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ZiLOG Z80380, User Manual

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ZiLOG Z80380 User Manual Download Page 140

5-106

Z380

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U

SER

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S

 M

ANUAL

DC-8297-03

Z

ILOG

MULTW
MULTIPLY (WORD)

MULTW [HL,]src

src = R, RX, IM, X

Operation:

HL(31-0)

←

HL(15-0) x src(15-0)

The contents of the HL register are multiplied by the source operand and the product is
stored in the HL register. The contents of the source are unaffected. Both operands are
treated as signed, two’s complement integers.

The initial contents of the HL register are overwritten by the result. The Carry flag is set to
indicate that the upper word of the HL register is required to represent the result; if the Carry
flag is cleared, the product can be correctly represented in 16 bits and the upper word of
the HL register merely holds sign-extension data.

Flags:

S:

Set if the result is negative; cleared otherwise

Z:

Set if the result is zero; cleared otherwise

H:

Unaffected

V:

Cleared

N:

Unaffected

C:

Set if the product is less than –32768 or greater than or equal to 32768; cleared
otherwise

Addressing

Execute

Mode

Syntax

Instruction Format

Time

Note

R:

MULTW [HL,]R

11101101 11001011 100100rr

10

RX:

MULTW [HL,]RX

11101101 11001011 1001010y

10

IM:

MULTW [HL,]nn

11101101 11001011 10010111 -n(low)- -n(high)

10

X:

MULTW [HL,](XY+d)

11y11101 11001011 ——d— 10010010

12+r

I

Field Encodings:

rr: 00 for BC, 01 for DE, 11 for HL
y:

0 for IX, 1 for IY

Summary of Contents for Z80380

Page 1: ...the Z380 CPU can handle Also this chapter includes a brief description of the on chip regis ters 3 Native Extended Mode Word Long Word Mode of Operation and Decoder Directives This chapter provides a...

Page 2: ...systems are those which are intended for surgical implantation into the body or which sustains life whose failure to perform when properly used in accordance with instructions for use provided in the...

Page 3: ...inter Relative loads and stores 16 bit and 24 bit Indexed offsets and in creased Indirect register addressing flexibility with all of the addressing modes allowing access to the entire 32 bit address...

Page 4: ...297 03 ZILOG 1 1 INTRODUCTION Continued A F B C D E H L IXU IXL IYU IYL A F B C D E H L IXU IXL IYU IYL BCz DEz HLz IXz IYz BCz DEz HLz IXz IYz R I SPz PCz Iz SP PC 4 Sets of Registers Figure 1 1 Z380...

Page 5: ...and Extended modes the Z380 drives all 32 bits of the address onto the external address bus only the width of the manipulated addresses distinguishes Native from Extended mode The Z380 CPU implements...

Page 6: ...asic data type is the 8 bit byte which is also the basicaddressablememoryelement Thearchitecturealso supports operations on bits BCD Binary Coded Decimal digits words 16 bits or 32 bits byte strings a...

Page 7: ...380 CPU due to the basic machine cycle s reduction to two clocks cycle from four clocks cycle on the Z80 CPU fine tuned four staged pipeline with prefetch cue This well designed pipeline and prefetch...

Page 8: ...emory addressing space and efficient handling of nested interrupts The benefits of this architecture including high throughput rates code den sity and compiler efficiency greatly enhance the power and...

Page 9: ...he pro gram has immediate access to both primary and alternate registers in the selected register set Changing register sets is a simple matter of an LDCTL instruction to program the Select Register S...

Page 10: ...3 ZILOG 2 2 CPU REGISTER SPACE Continued A F B C D E H L IXU IXL IYU IYL A F B C D E H L IXU IXL IYU IYL BCz DEz HLz IXz IYz BCz DEz HLz IXz IYz R I SPz PCz Iz SP PC 4 Sets of Registers Figure 2 1 Reg...

Page 11: ...g mode Only one register of each can be active at any given time although data in the inactive file can still be accessed by using EX IX IX and EX IY IY either in 16 bit or 32 bit wide depending on th...

Page 12: ...of 4 Gbytes numbered consecutively in ascending order The8 bitbyteisthebasicaddressableelementintheZ380 MPU memory address space However there are other addressabledataelements bits 2 bytewords bytest...

Page 13: ...te Address n Address n 1 32 bit word at address n D7 0 Least Significant Byte D15 8 Address n Address n 1 Address n 2 Address n 3 D31 24 Most Significant Byte D23 16 Memory addresses Least Significant...

Page 14: ...al on chip registers which occupy an on chip I O address space This on chip I Oaddressspacecanbeaccessedonlywiththefollowing reserved on chip I O instructions which are identical to the Z180 original...

Page 15: ...6 Internet http www zilog com 1994 1995 1996 1997 by Zilog Inc All rights reserved No part of this document may be copied or reproduced in any form or by any means without the prior written consent of...

Page 16: ...he pro gram has immediate access to both primary and alternate registers in the selected register set Changing register sets is a simple matter of an LDCTL instruction to program the Select Register S...

Page 17: ...3 ZILOG 2 2 CPU REGISTER SPACE Continued A F B C D E H L IXU IXL IYU IYL A F B C D E H L IXU IXL IYU IYL BCz DEz HLz IXz IYz BCz DEz HLz IXz IYz R I SPz PCz Iz SP PC 4 Sets of Registers Figure 2 1 Reg...

Page 18: ...g mode Only one register of each can be active at any given time although data in the inactive file can still be accessed by using EX IX IX and EX IY IY either in 16 bit or 32 bit wide depending on th...

Page 19: ...of 4 Gbytes numbered consecutively in ascending order The8 bitbyteisthebasicaddressableelementintheZ380 MPU memory address space However there are other addressabledataelements bits 2 bytewords bytest...

Page 20: ...te Address n Address n 1 32 bit word at address n D7 0 Least Significant Byte D15 8 Address n Address n 1 Address n 2 Address n 3 D31 24 Most Significant Byte D23 16 Memory addresses Least Significant...

Page 21: ...al on chip registers which occupy an on chip I O address space This on chip I Oaddressspacecanbeaccessedonlywiththefollowing reserved on chip I O instructions which are identical to the Z180 original...

Page 22: ...6 Internet http www zilog com 1994 1995 1996 1997 by Zilog Inc All rights reserved No part of this document may be copied or reproduced in any form or by any means without the prior written consent of...

Page 23: ...is condition it behaves exactly the same as the Z80 CPU even though it has access to the entire 4 Gbytes of memory for data access and 4G locations of I O space access to the newly added registers whi...

Page 24: ...cution in Word mode This is useful while the Long Word LW bit in the Select Register SR is set but 16 bit data manipulation is required for this instruction The LW decoder directive causes the instruc...

Page 25: ...00H is appended as the Most significant byte as HL31 HL24 DDIR LW LD HL 1234H Loads 00001234H into HL31 HL0 0000H is appended as the HL31 HL16 portion Zilog s products are not authorized for use as c...

Page 26: ...e is used the instruction pro cesses data taken from one of the 8 bit registers A B C D E H L IXU IXL IYU IYL one of the 16 bit registers BC DE HL IX IY SP or one of the special byte registers I or R...

Page 27: ...mode is located in either the I O address space I O instruction or memory address space all other instruc tions Indirect Register mode can save space and reduce ex ecution time when consecutive locati...

Page 28: ...24 or 32 bits Operand width is affected by LW bit status for the load and exchange instructions Example of DA mode 1 Load BC register from memory location 00005E22H in Word mode LD BC 5E22H Load BC w...

Page 29: ...offset DDIR IW for 24 bit offset Note that computation of the effective address is affected by the operation mode Native or Extended In Native mode address computation is done in modulo 216 and in Ex...

Page 30: ...ssing allows reference forward or backward from the current Program Counter value it is used for program control instructions such as Jumps and Calls that access constants in the memory As a displacem...

Page 31: ...culation Since this is a 4 byte instruction the PC value after fetch but before jump taking place is 19590807 00000004 1959080B The displacement portion 5000H is sign extended to a 32 bit value before...

Page 32: ...n is done in modulo 216 mean ingcomputationisdonein16 bitanddoesnotaffectupper halfoftheSPportionforcalculation wraparoundwithinthe 16 bit In Extended mode address computation is done in modulo 232 Al...

Page 33: ...sign extended to a 32 bit value before the address calculation and calculation is done in modulo 232 07FF7F00 FFFFFFFC 07FF7EFC 3 Load HL from location SP 10000H in Extended mode Long Word mode SETC X...

Page 34: ...move instructions allow strings of bytes words in memory to be moved from one location to another Block search instruc tionsprovideforscanningstringsofbytes wordsinmemory to locate a particular value...

Page 35: ...ed instructions in that the result of executing one instruction may alter the flags and the resulting value of the flags can be used to determine the operation of a subse quent instruction The program...

Page 36: ...arity P 1 During block search and block transfer instructions the P V flag monitors the state of the Byte Count register BC When decrementing the byte counter results in a zero value the flag is clear...

Page 37: ...itself Table 5 1 lists the condition code mnemonic the flag setting it represents and the binary encoding for each condition code Table 5 1 Condition codes Condition Codes for Jump Call and Return In...

Page 38: ...ars this bit selecting IY 5 3 3 IX Bank Select IXBANK This 2 bit field selects the register set to be used for the IX and IX registers This field can be set independently of the register set selection...

Page 39: ...Resetisanasynchronouseventgeneratedby outside circuits It terminates all current activities and puts the CPU into a known state Interrupts and Traps are discussed in detail in Chapter 6 and Reset is...

Page 40: ...le5 2 includesloadinstruc tions for transferring data between byte registers transfer ring data between a byte register and memory and load ing immediate data into byte register or memory For the supp...

Page 41: ...upported sources are listed in Table 5 7 Swap instructions allows swapping of the contents of the Word wide register BC DE HL IX or IY with its Extended portion These instructions are useful to manipu...

Page 42: ...ptible this is essential since the repetition count can be as high as 65536 The instruction can be interrupted after any interaction in which case the address of the instruction itself rather than nex...

Page 43: ...ruction itself or from memory For memory addressing modes followsaresupported IndirectRegister Indexed and Direct Address except multiplies which returns the 16 bit result to the same register by mult...

Page 44: ...SP nn src X AND Word ANDW HL src src Complement Accumulator CPLW HL dst Compare Word CPW HL src src Decrement Word DEC W dst dst X Divide Unsigned DIVUW HL src src Extend Sign Word EXTSW HL dst Incre...

Page 45: ...D E H L HL IX d IY d Bit Test BIT dst Reset Bit RES dst Rotate Left RL dst Rotate Left Accumulator RLA Rotate Left Circular RLC dst Rotate Left Circular Accumulator RLCA Rotate Left Digit RLD Rotate...

Page 46: ...current contents of the PC are pushed onto the stack and the effective address indicated by the instruction is loaded Table 5 13 Program Control Group Instructions Instruction Name Format nn PC d HL I...

Page 47: ...structionsfortransferringasingleword INW OUTW can transfer data between the register pair and the periph eral port specified by the contents of the C register For Word I O the contents of B D or H app...

Page 48: ...t Decrement and Repeat Word INDRW Input and Increment Byte INI Input and Increment Word INIW Input Increment and Repeat Byte INIR Input Increment and Repeat Word INIRW Output OUT C src src A B C D E H...

Page 49: ...tructions for transferring blocks of data from memory to Internal I O locations The operation of these instructions is very similar to that of the block move instructions described earlier with the ex...

Page 50: ...uses the alter nate bank to save a register for the first time and saves registers into memory thereafter Mode Test instructions reports the current mode of opera tion Native Extended Word Long Word...

Page 51: ...d description a listing of all the flags that are affected by the instruction and illustrations of the opcodes for all variants of the instruction Symbols The following symbols are used to describe th...

Page 52: ...the table replace d value with the real number The results being 76 543 210 HEX 11 011 101 DD 01 110 001 71 00 010 010 21 5 7 EXECUTION TIME i in the execution time column indicates an I O read opera...

Page 53: ...N A N A N A N A 1X External I O Write 1 2 1 2 N A N A N A N A N A N A 2X External I O Read 9 11 9 11 N A N A N A N A N A N A 2X External I O Write 1 3 1 3 N A N A N A N A N A N A 4X External I O Read...

Page 54: ...if the result is zero cleared otherwise H Set if there is a carry from bit 3 of the result cleared otherwise V Set if arithmetic overflow occurs that is if both operands cleared otherwise N Cleared C...

Page 55: ...if the result is negative cleared otherwise Z Set if the result is zero cleared otherwise H Set if there is a carry from bit 11 of the result cleared otherwise V Set if arithmetic overflow occurs that...

Page 56: ...o cleared otherwise H Set if there is a carry from bit 11 of the result cleared otherwise V Set if arithmetic overflow occurs that is if both operands are of the same sign and the result is of the opp...

Page 57: ...ere is a carry from bit 3 of the result cleared otherwise V Set if arithmetic overflow occurs that is if both operands are of the same sign and the result is of the opposite sign cleared otherwise N C...

Page 58: ...length of the operand is controlled by the Extended Native mode selection which is consistent with the manipulation of an address by the instruction Flags S Unaffected Z Unaffected H Set if there is a...

Page 59: ...ed in the SP register This has the effect of allocating or allocating space on the stack Two s complement addition is performed Flags S Unaffected Z Unaffected H Set if there is a carry from bit 11 of...

Page 60: ...Set if there is a carry from bit 11 of the result cleared otherwise V Set if arithmetic overflow occurs that is if both operands are of the same sign and the result is of the opposite sign cleared ot...

Page 61: ...red The contents of the source are unaffected Flags S Set if the most significant bit of the result is set cleared otherwise Z Set if all bits of the result are zero cleared otherwise H Set P Set if t...

Page 62: ...a 0 is stored The contents of the source are unaffected Flags S Set if the most significant bit of the result is set cleared otherwise Z Set if all bits of the result are zero cleared otherwise H Set...

Page 63: ...be tested is specified by a 3 bit field in the instruction this field contains the binary encoding for the bit number to be tested The bit number b must be between 0 and 7 Flags S Unaffected Z Set if...

Page 64: ...am to determine the state of the machine Flags S Set if the alternate bank IX is in use cleared otherwise Z Set if the alternate bank IY is in use cleared otherwise H Unaffected V Set if the alternate...

Page 65: ...n byte following the Call instruction The destination address is then loaded into the PC and points to the first instruction of the called procedure At the end of a procedure a Return instruction RET...

Page 66: ...e a RETurn instruction is used to return to the original program These instructions employ either an 8 bit 16 bit or 24 bit signed two s complement displacement from the PC to permit calls within the...

Page 67: ...n C NOT C The Carry flag is inverted Flags S Unaffected Z Unaffected H The previous state of the Carry flag V Unaffected N Cleared C Set if the Carry flag was clear before the operation cleared otherw...

Page 68: ...Set if there is a borrow from bit 4 of the result cleared otherwise V Set if arithmetic overflow occurs that is if the operands are of different signs and the result is of the same sign as the source...

Page 69: ...ise H Set if there is a borrow from bit 12 of the result cleared otherwise V Set if arithmetic overflow occurs that is if the operands are of different signs and the result is of the same sign as the...

Page 70: ...tes are unaffected Two s complement subtraction is performed Next the HL register is decremented by one thus moving the pointer to the previous element in the string The BC register used as a counter...

Page 71: ...er is decremented by one thus moving the pointer to the previous element in the string TheBCregister usedasacounter isthendecrementedbyone Iftheresultofdecrementing the BC register is not zero and no...

Page 72: ...rybytesareunaffected Two scomplementsubtractionisperformed Nextthe HL register is incremented by one thus moving the pointer to the next element in the string The BC register used as a counter is then...

Page 73: ...s incremented by one thus moving the pointer to the next element in the string The BC register used as a counter is then decremented by one If the result of decrementing the BC register is not zero an...

Page 74: ...CPL A Operation A NOT A Thecontentsoftheaccumulatorarecomplemented one scomplement all1sarechanged to 0 and vice versa Flags S Unaffected Z Unaffected H Set V Unaffected N Set C Unaffected Addressing...

Page 75: ...tion HL 15 0 NOT HL 15 0 The contents of the HL register are complemented ones complement all 1s are changed to 0 and vice versa Flags S Unaffected Z Unaffected H Set V Unaffected N Set C Unaffected A...

Page 76: ...peration DAA Bits 7 4 DAA Bits 3 0 to Byte DAA DAA 0 0 9 0 0 9 00 0 0 0 0 8 0 A F 06 0 1 ADD 0 0 9 1 0 3 06 0 0 ADC 0 A F 0 0 9 60 1 0 INC 0 9 F 0 A F 66 1 1 N 0 0 A F 1 0 3 66 1 0 1 0 2 0 0 9 60 1 0...

Page 77: ...ct address and in front of any trailing opcode bytes Byte ordering within the instruction follows the usual convention least significant byte first followed by more significant bytes More significant...

Page 78: ...zero cleared otherwise H Set if there is a borrow from bit 4 of the result cleared otherwise V Set if arithmetic overflow occurs that is if the destination was 80H cleared otherwise N Set C Unaffecte...

Page 79: ...plement subtraction is performed Note that the length of the operand is controlledbytheExtended Nativemodeselection whichisconsistentwiththemanipulation of an address by the instruction Flags S Unaffe...

Page 80: ...r and then clear the Interrupt Enable Flag IEF1 in the Select Register SR if the least significant bit of the argument is set disabling maskable interrupts Bits 7 5 of the argument are ignored If no a...

Page 81: ...ero flag is set according to the value of the quotient Case 2 If the divisor is zero the HL register is unchanged the Zero and Overflow flags are set to 1 and the Sign flag is cleared to 0 Case 3 If t...

Page 82: ...of loop control The destination address is calculated using Relative addressing The displacement in the instruction is added to the PC the PC value used is the address of the instruction following the...

Page 83: ...the Interrupt Enable Flag IEF1 in the Select Register SR if the least significant bit of the argument is set enabling maskable interrupts Bits 7 5 of the argument are ignored If no argument is presen...

Page 84: ...ch controls the selection of primary or alternate bank for the accumulator and flag register is complemented thus effectively exchanging the accumulator and flag registers between the two banks Flags...

Page 85: ...0 The contents of the destination register are exchanged with the top of the stack In Long Word mode this exchange is two words otherwise it is one word Flags S Unaffected Z Unaffected H Unaffected V...

Page 86: ...are exchanged with the contents of the source Flags S Unaffected Z Unaffected H Unaffected V Unaffected N Unaffected C Unaffected Addressing Execute Mode Syntax Instruction Format Time Note R EX BC D...

Page 87: ...hanged with the contents of the source where the destination is a register in the primary bank and the source is the corresponding register in the alternate bank Flags S Unaffected Z Unaffected H Unaf...

Page 88: ...ntents of the source where the destination is a word register in the primary bank and the source is the corresponding word register in the alternate bank Flags S Unaffected Z Unaffected H Unaffected V...

Page 89: ...ntents of the accumulator are exchanged with the contents of the source Flags S Unaffected Z Unaffected H Unaffected V Unaffected N Unaffected C Unaffected Addressing Execute Mode Syntax Instruction F...

Page 90: ...ect Register SR which control the selection of primary or alternate bank for the BC DE HL IX and IY registers are complemented thus effectively exchanging the BC DE HL IX and IY registers between the...

Page 91: ...r considered as a signed two s complement integer are sign extended to 16 bits and the result is stored in the HL register The contents of the accumulator are unaffected This instruction is useful for...

Page 92: ...of the HL register considered as a signed two s complement integer are sign extended to 32 bits in the HL register This instruction is useful for conversion of 16 bit signed operands into 32 bit signe...

Page 93: ...R which controls the selection of primary or alternate bank for the BC DE and HL registers is complemented thus effectively exchanging the BC DE and HL registers between the two banks Flags S Unaffect...

Page 94: ...egister SR which controls the selection of primary or alternate bank for the IX register is complemented thus effectively exchanging the IX register between the two banks Flags S Unaffected Z Unaffect...

Page 95: ...egister SR which controls the selection of primary or alternate bank for the IY register is complemented thus effectively exchanging the IY register between the two banks Flags S Unaffected Z Unaffect...

Page 96: ...r reset request is accepted After an interrupt is serviced the instruction following HALT is executed While the CPU is halted memory refresh cycles still occur and bus requests are honored When this i...

Page 97: ...r a description of the various modes for responding to interrupts The current interrupt mode can be read from the Select Register SR Flags S Unaffected Z Unaffected H Unaffected V Unaffected N Unaffec...

Page 98: ...on the contents of the 32 bit BC register are placed on the address bus Flags S Set if the input data is negative cleared otherwise Z Set if the input data is zero cleared otherwise H Cleared P Set if...

Page 99: ...contents of the 32 bit BC register are placed on the address bus Flags S Set if the input data is negative cleared otherwise Z Set if the input data is zero cleared otherwise H Cleared P Set if the in...

Page 100: ...ction the 8 bit peripheral address from the instruction is placed on the low byte of the address bus the contents of the accumulator are placed on address lines A15 A8 and the high order address lines...

Page 101: ...ipheral address is placed on the low byte of the address bus and zeros are placed on all other address lines When the second opcode byte is 30h no data is stored in a destination only the flags are up...

Page 102: ...ing the I O transaction the peripheral address from the instruction is placed on the address bus Any bytes of address not specified in the instruction are driven on the address lines as all zeros Flag...

Page 103: ...During the I O transaction the peripheral address from the instruction is placed on the address bus Any bytes of address not specified in the instruction are driven on the address lines as all zeros F...

Page 104: ...o cleared otherwise H Set if there is a carry from bit 3 of the result cleared otherwise V Set if arithmetic overflow occurs that is if the destination was 7FH cleared otherwise N Cleared C Unaffected...

Page 105: ...nt addition is performed Note that the length of the operand is controlled by the Extended Native mode selection which is consistent with the manipulation of an address by the instruction Flags S Unaf...

Page 106: ...seable as part of a fixed port address First the byte of data from the selected peripheral is loaded into the memory location addressed by the HL register Then the B register used as a counter is decr...

Page 107: ...a from the selected peripheral is loaded into the memory location addressed by the HL register Then the BC register used as a counter is decremented by one The HL register is then decremented by two t...

Page 108: ...n addressed by the HL register Then the B register used as a counter is decremented by one The HL register is then decremented by one thus moving the pointer to the next destination for the input If t...

Page 109: ...Then the BC register used as a counter is decremented by one The HL register is then decremented by two thus moving the pointer to the next destination for the input If the result of decrementing the...

Page 110: ...seable as part of a fixed port address First the byte of data from the selected peripheral is loaded into the memory location addressed by the HL register Then the B register used as a counter is decr...

Page 111: ...a from the selected peripheral is loaded into the memory location addressed by the HL register Then the BC register used as a counter is decremented by one The HL register is then incremented by two t...

Page 112: ...n addressed by the HL register Then the B register used as a counter is decremented by one The HL register is then incremented by one thus moving the pointer to the next destination for the input If t...

Page 113: ...counter is decremented by one The HL register is then incremented by two thus moving the pointer to the next destination for the input If the result of decrementing the BC register is 0 the instructio...

Page 114: ...ss otherwise the instruction following the Jump instruction is executed Each of the Zero Carry Sign and Overflow flags can be individually tested and a jump performed conditionally on the setting of t...

Page 115: ...address is calculated using relative addressing The displacement in the instruction is added to the PC value for the instruction following the JR instruction not the value of the PC for the JR instru...

Page 116: ...Note R LD A R 01111 r 2 RX LD A RX 11y11101 0111110w 2 IM LD A n 00111110 n 2 IR LD A HL 01111110 2 r LD A IR 000a1010 2 r DA LD A nn 00111010 n low n high 3 r I X LD A XY d 11y11101 01111110 d 4 r I...

Page 117: ...tion Flags S Unaffected Z Unaffected H Unaffected V Unaffected N Unaffected C Unaffected Addressing Execute Mode Syntax Instruction Format Time Note R LD R n 00 r 110 n 2 RX LD RX n 11y11101 0010w110...

Page 118: ...e word of immediate data is loaded into the destination Flags S Unaffected Z Unaffected H Unaffected V Unaffected N Unaffected C Unaffected Addressing Execute Mode Syntax Instruction Format Time Note...

Page 119: ...se begin dst 15 0 nn end The word of immediate data is loaded into the destination Flags S Unaffected Z Unaffected H Unaffected V Unaffected N Unaffected C Unaffected Addressing Execute Mode Syntax In...

Page 120: ...Rd RX 11y11101 01 ra10w 2 LD RXa RXb 11y11101 0110a10b 2 IM LD R n 00 r 110 n 2 IR LD R HL 01 r 110 5 w X LD R XY d 11y11101 01 r 110 d 7 w I Load from Register Addressing Execute Mode Syntax Instruct...

Page 121: ...r Addressing Execute Mode Syntax Instruction Format Time Note R LD Rd Rs 11rs1101 00rd0010 2 L RX LD R RX 11y11101 00rr1011 2 L IR LD R IR 11011101 00rr11ri 2 r L LD RX IR 11y11101 00ri0011 2 r L DA L...

Page 122: ...w I L LD nn R 11101101 01ra0011 n low n high 4 w I L LD nn RX 11y11101 00100010 n low n high 4 w I L X LD XY d R 11y11101 11001011 d 00rr1011 5 w I L LD IY d IX 11111101 11001011 d 00101011 5 w I L LD...

Page 123: ...d Z Unaffected H Unaffected V Unaffected N Unaffected C Unaffected Load into Stack Pointer Addressing Execute Mode Syntax Instruction Format Time Note R LD SP HL 11111001 2 L RX LD SP RX 11y11101 1111...

Page 124: ...uring execution of either of these instructions the Overflow flag reflects the prior state of the interrupt enable Also note that the R register does not contain the refresh address and is not modifie...

Page 125: ...umulatorareloadedintothedestination NotethattheRregisterdoes not contain the refresh address and is not modified by refresh transactions Flags S Unaffected Z Unaffected H Unaffected V Unaffected N Una...

Page 126: ...15 0 end The contents of the source are loaded into the destination Flags S Unaffected Z Unaffected H Unaffected V Unaffected N Unaffected C Unaffected Load from I Register Addressing Execute Mode Syn...

Page 127: ...Unaffected Z Unaffected H Unaffected V Unaffected N Unaffected C Unaffected Load into Control Register Addressing Execute Mode Syntax Instruction Format Time Note R LDCTL SR A 11011101 11001000 4 LDCT...

Page 128: ...dst 31 0 src 31 0 end else begin dst 15 0 src 15 0 end The contents of the Select Register SR are loaded into the HL register Flags S Unaffected Z Unaffected H Unaffected V Unaffected N Unaffected C...

Page 129: ...the Select Register SR If Long Word mode is not in effect the upper byte of the HL register is copied into the three most significant bytes of the select register This instruction does not modify the...

Page 130: ...nto the location addressed by the DE register Both the DE and HL registers are then decremented by one thus moving the pointers to the preceeding elements in the string The BC register used as a count...

Page 131: ...by the DE register Both the DE and HL registers are then decremented by two or four thus moving the pointers to the preceeding words in the array The BC register used as a byte counter is then decrem...

Page 132: ...crementing the pointers during the transfer is important if the source and destination strings overlap with the source string starting at a lower memory address Placing the pointers at the highest add...

Page 133: ...truction is executed 65 536 words are transferred The effect of decrementing the pointers during the transfer is important if the source and destination strings overlap with the source string starting...

Page 134: ...d into the location addressed by the DE register Both the DE and HL registers are then incremented by one thus moving the pointers to the next elements in the string The BC register used as a counter...

Page 135: ...by the DE register Both the DE and HL registers are then incremented by two or four thus moving the pointers to the succeeding words in the array The BC register used as a byte counter is then decrem...

Page 136: ...incrementing the pointers during the transfer is important if the source and destination strings overlap with the source string starting at a higher memory address Placing the pointers at the lowest...

Page 137: ...struction is executed 65 536 words are transferred The effect of incrementing the pointers during the transfer is important if the source and destination strings overlap with the source string startin...

Page 138: ...ents of the lower byte of the source register and the product is stored in the source register Both operands Both operands are treated as unsigned binary integers Flags S Unaffected Z Unaffected H Una...

Page 139: ...to the flags This allows the program to determine the state of the machine Flags S Set if Extended mode is in effect cleared otherwise Z Set if Long word mode is in effect cleared otherwise H Unaffect...

Page 140: ...result if the Carry flag is cleared the product can be correctly represented in 16 bits and the upper word of the HL register merely holds sign extension data Flags S Set if the result is negative cle...

Page 141: ...egister is required to represent the result if the Carry flag is cleared the product can be correctly represented in 16 bits and the upper word of the HL register merely holds zero Flags S Cleared Z S...

Page 142: ...erpart for this case the Overflow flag is set to 1 Flags S Set if the result is negative cleared otherwise Z Set if the result is zero cleared otherwise H Set if there is a borrow from bit 4 of the re...

Page 143: ...e counterpart for this case the Overflow flag is set to 1 Flags S Set if the result is negative cleared otherwise Z Set if the result is zero cleared otherwise H Set if there is a borrow from bit 4 of...

Page 144: ...DC 8297 03 ZILOG NOP NO OPERATION NOP Operation None No operation Flags S Unaffected Z Unaffected H Unaffected V Unaffected N Unaffected C Unaffected Addressing Execute Mode Syntax Instruction Format...

Page 145: ...bit is stored The contents of the source are unaffected Flags S Set if the most significant bit of the result is set cleared otherwise Z Set if all bits of the result are zero cleared otherwise H Cle...

Page 146: ...wise a 0 bit is stored The contents of the source are unaffected Flags S Set if the most significant bit of the result is set cleared otherwise Z Set if all bits of the result are zero cleared otherwi...

Page 147: ...ster The C register holding the port address is decremented by one to select the next output port The B register used as a counter is then decremented by one The HL register is then decremented by one...

Page 148: ...the port address is decremented by one to select the next output port The B register used as a counter is then decremented by one The HL register is then decremented by one thus moving the pointer to...

Page 149: ...d by one The byte of data from the memory location addressed by the HL register is loaded into the selected peripheral The HL register is then decremented by one thus moving the pointer to the next so...

Page 150: ...aded into the selected peripheral The HL register is then decremented by two thus moving the pointer to the next source for the output If the result of decrementing the BC register is 0 the instructio...

Page 151: ...C register TheCregister holdingtheportaddress isincrementedbyonetoselectthenextoutputport The B register used as a counter is then decremented by one The HL register is then incremented by one thus m...

Page 152: ...ldingtheportaddress isincrementedbyonetoselectthenextoutputport The B register used as a counter is then decremented by one The HL register is then incremented by one thus moving the pointer to the ne...

Page 153: ...d by one The byte of data from the memory location addressed by the HL register is loaded into the selected peripheral The HL register is then incremented by one thus moving the pointer to the next so...

Page 154: ...aded into the selected peripheral The HL register is then incremented by two thus moving the pointer to the next source for the output If the result of decrementing the BC register is 0 the instructio...

Page 155: ...d peripheral During the I O transaction the contents of the 32 bit BC register are placed on the address bus Flags S Unaffected Z Unaffected H Unaffected V Unaffected N Unaffected C Unaffected Address...

Page 156: ...uring the I O transaction the contents of the 32 bit BC register are placed on the address bus Flags S Unaffected Z Unaffected H Unaffected V Unaffected N Unaffected C Unaffected Addressing Execute Mo...

Page 157: ...saction the 8 bit peripheral address from the instruction is placed on the low byte of the address bus the contents of the accumulator are placed on address lines A 15 8 and the high order address lin...

Page 158: ...hough the I O address will appear on the address bus and the write data will appear on the data bus while this internal write is occurring The peripheral address is placed on the low byte of the addre...

Page 159: ...ng the I O transaction the peripheral address from the instruction is placed on the address bus Any bytes of address not specified in the instruction are driven on the address lines are all zeros Flag...

Page 160: ...uring the I O transaction the peripheral address from the instruction is placed on the address bus Any bytes of address not specified in the instruction are driven on the address lines are all zeros F...

Page 161: ...a fixed port address The decremented B register is used in the address First the B register used as a counter is decremented by one The byte of data from the memory location addressed by the HL regist...

Page 162: ...gister used as a counter is decremented by one The word of data from the memory location addressed by the HL register is loaded into the selected peripheral The HL register is then decremented by two...

Page 163: ...a fixed port address The decremented B register is used in the address First the B register used as a counter is decremented by one The byte of data from the memory location addressed by the HL regist...

Page 164: ...gister used as a counter is decremented by one The word of data from the memory location addressed by the HL register is loaded into the selected peripheral The HL register is then incremented by two...

Page 165: ...s memory locations For this instruction the Flag register is the least significant byte followed by the Accumulator The SP is then incremented by two by four in the Long Word mode Note that in the Lon...

Page 166: ...ded into the destination in ascending byte order from ascending address memory locations The SP is then incremented by two by four in the Long Word mode Note that when not in the Long Word mode the mo...

Page 167: ...ssed by the Stack Pointer SP are loaded into the destination in ascending byte order from ascending address memory locations The SP is then incremented by two by four in the Long Word mode Flags S Una...

Page 168: ...o the memory locations addressed by the SP in ascending byte order in ascending address memory locations For this instruction the Flag register is the least significant byte followed by the Accumulato...

Page 169: ...end The Stack Pointer SP is decremented by two by four in Long Word mode and the source is loaded into the memory locations addressed by the SP in ascending byte order in ascending address memory loca...

Page 170: ...rc 15 8 end The Stack Pointer SP is decremented by two by four in Long Word mode and the source is loaded into the memory locations addressed by the SP in ascending byte order in ascending address mem...

Page 171: ...our in Long Word mode and the source is loaded into the memory locations addressed by the SP in ascending byte order in ascending address memory locations The contents of the source are unaffected Fla...

Page 172: ...bit field in the instruction this field contains the binary encoding for the bit number to be cleared The bit number b must be between 0 and 7 Flags S Unaffected Z Unaffected H Unaffected V Unaffected...

Page 173: ...instructionhasbeenexecuted andthatoneormoreofthesucceedinginstructionsmayalso have been fetched for decoding before this instruction has been executed When reseting Long Word mode LW the LW bit bit 6...

Page 174: ...ecuted otherwise a value is popped from the stack and loaded into the ProgramCounter PC therebyspecifyingthelocationofthenextinstructiontobeexecuted For an unconditional return the return is always ta...

Page 175: ...ter SPC which holds the address of the next instruction of the previously executing procedure are loaded into the Program Counter PC Note that maskable interrupts if IEF1 is set and non maskable inter...

Page 176: ...contents of the location addressed by the Stack Pointer SP are popped into the Program Counter PC thereby specifying the location of the next instruction to be executed A special sequence of bus tran...

Page 177: ...at the end of a procedure entered by a nonmaskable interrupt The contents of the location addressed by the Stack Pointer SP are popped into the Program Counter PC thereby specifying the location of t...

Page 178: ...d the Carry flag is moved to bit 0 of the destination Flags S Set if the most significant bit of the result is set cleared otherwise Z Set if the result is zero cleared otherwise H Cleared P Set if pa...

Page 179: ...of the destination Flags S Set if the most significant bit of the result is set cleared otherwise Z Set if the result is zero cleared otherwise H Cleared P Set if parity of the result is even cleared...

Page 180: ...h the Carry flag and together they are rotated left one bit position Bit 7 of the accumulator is moved to the Carry flag and the Carry flag is moved to bit 0 of the accumulator Flags S Unaffected Z Un...

Page 181: ...eplaces the Carry flag Flags S Set if the most significant bit of the result is set cleared otherwise Z Set if the result is zero cleared otherwise H Cleared P Set if parity of the result is even clea...

Page 182: ...if the most significant bit of the result is set cleared otherwise Z Set if the result is zero cleared otherwise H Cleared P Set if parity of the result is even cleared otherwise N Cleared C Set if th...

Page 183: ...ents of the accumulator are rotated left one bit position Bit 7 of the accumulator is moved to the bit 0 position and also replaces the Carry flag Flags S Unaffected Z Unaffected H Cleared P Unaffecte...

Page 184: ...er digit of the source The upper digit of the accumulator is unaffected In multiple digit BCD arithmetic this instruction can be used to shift to the left a string of BCD digits thus multiplying it by...

Page 185: ...nd the Carry flag is moved to bit 7 of the destination Flags S Set if the most significant bit of the result is set cleared otherwise Z Set if the result is zero cleared otherwise H Cleared P Set if p...

Page 186: ...ficant bit of the destination Flags S Set if the most significant bit of the result is set cleared otherwise Z Set if the result is zero cleared otherwise H Cleared P Set if parity of the result is ev...

Page 187: ...h the Carry flag and together they are rotated right one bit position Bit 0 of the accumulator is moved to the Carry flag and the Carry flag is moved to bit 7 of the accumulator Flags S Unaffected Z U...

Page 188: ...replaces the Carry flag Flags S Set if the most significant bit of the result is set cleared otherwise Z Set if the result is zero cleared otherwise H Cleared P Set if parity of the result is even cle...

Page 189: ...s S Set if the most significant bit of the result is set cleared otherwise Z Set if the result is zero cleared otherwise H Cleared P Set if parity of the result is even cleared otherwise N Cleared C S...

Page 190: ...ents of the accumulator are rotated right one bit position Bit 0 of the accumulator is moved to the bit 7 position and also replaces the Carry flag Flags S Unaffected Z Unaffected H Cleared P Unaffect...

Page 191: ...pper digit of the source The upper digit of the accumulator is unaffected In multiple digit BCD arithmetic this instruction can be used to shift to the right a string of BCD digits thus dividing it by...

Page 192: ...all to one of eight fixed locations as shown in the table below The table also indicates the encoding of the address used in the instruction encoding The address is in hexadecimal the encoding in bina...

Page 193: ...leared otherwise H Set if there is a borrow from bit 4 of the result cleared otherwise V Set if arithmetic overflow occurs that is if the operands are of different signs and the result is of the same...

Page 194: ...Set if the result is negative cleared otherwise Z Set if the result is zero cleared otherwise H Set if there is a borrow from bit 12 of the result cleared otherwise V Set if arithmetic overflow occur...

Page 195: ...is zero cleared otherwise H Set if there is a borrow from bit 12 of the result cleared otherwise V Set if arithmetic overflow occurs that is if the operands are of different signs and the result is o...

Page 196: ...C 8297 03 ZILOG SCF SET CARRY FLAG SCF Operation C 1 The Carry flag is set to 1 Flags S Unaffected Z Unaffected H Cleared V Unaffected N Cleared C Set Addressing Execute Mode Syntax Instruction Format...

Page 197: ...t field in the instruction this field contains the binary encoding for the bit number to be set The bit number b must be between 0 and 7 Flags S Unaffected Z Unaffected H Unaffected V Unaffected N Una...

Page 198: ...32 bit words all word load instructions transfer 32 bits WhensettingExtendedmode XM theXMbit bit7 intheSRissetto1 selectingaddresses modulo 4 294 967 296 32 bits as opposed to addresses modulo 65536 1...

Page 199: ...to bit 0 of the destination Flags S Set if the most significant bit of the result is set cleared otherwise Z Set if the result is zero cleared otherwise H Cleared P Set if parity of the result is even...

Page 200: ...Set if the most significant bit of the result is set cleared otherwise Z Set if the result is zero cleared otherwise H Cleared P Set if parity of the result is even cleared otherwise N Cleared C Set...

Page 201: ...peration to stop thus minimizing power dissipation The STNBY signal is asserted to indicate this Standby mode status STNBY remains asserted until an interrupt or reset request is accepted which causes...

Page 202: ...lag and bit 7 remains unchanged Flags S Set if the result is negative cleared otherwise Z Set if the result is zero cleared otherwise H Cleared P Set if parity of the result is even cleared otherwise...

Page 203: ...anged Flags S Set if the result is negative cleared otherwise Z Set if the result is zero cleared otherwise H Cleared P Set if parity of the result is even cleared otherwise N Cleared C Set if the bit...

Page 204: ...rry flag and zero is shifted into bit 7 of the destination Flags S Cleared Z Set if the result is zero cleared otherwise H Cleared P Set if parity of the result is even cleared otherwise N Cleared C S...

Page 205: ...gnificant bit of the destination Flags S Cleared Z Set if the result is zero cleared otherwise H Cleared P Set if parity of the result is even cleared otherwise N Cleared C Set if the bit shifted from...

Page 206: ...t if there is a borrow from bit 4 of the result cleared otherwise V Set if arithmetic overflow occurs that is if the operands are of different signs and the result is of the same sign as the source cl...

Page 207: ...complement subtraction is performed Note that the length of the operand is controlled by the Extended Native mode selection which is consistent with the manipulation of an address by the instruction...

Page 208: ...ce is stored in the SP register This has the effect of allocating or deallocating space on the stack Two s complement subtraction is performed Flags S Unaffected Z Unaffected H Set if there is a borro...

Page 209: ...rwise H Set if there is a borrow from bit 12 of the result cleared otherwise V Set if arithmetic overflow occurs that is if the operands are of different signs and the result is of the same sign as th...

Page 210: ...ficant word of the source are exchanged with the contents of the least significant word of the source Flags S Unaffected Z Unaffected H Unaffected V Unaffected N Unaffected C Unaffected Addressing Exe...

Page 211: ...ed only the flags are modified as a result of this instruction Flags S Set if the most significant bit of the result is set cleared otherwise Z Set if all bits of the result are zero cleared otherwise...

Page 212: ...ll be generated as a result of this instruction although the I O address will appear on the adress bus while the internal read is occurring The peripheral address in the C register is placed on the lo...

Page 213: ...wise a 0 bit is stored The contents of the source are unaffected Flags S Set if the most significant bit of the result is set cleared otherwise Z Set if all bits of the result are zero cleared otherwi...

Page 214: ...tomer and Zilog prior to use Life support devices or systems are those which are intended for surgical implantation into the body or which sustains life whose failure to perform when properly used in...

Page 215: ...NMI is reserved for high priority external events that need imme diateattention suchasanimminentpowerfailure Maskable Interrupts are Interrupts that can be disabled masked through software by cleaning...

Page 216: ...U provides an Interrupt Register Extension whose contents are always output as the address bus signals A31 A16 when fetching the starting addresses of service routines from memory in Interrupt Modes 2...

Page 217: ...vice routine Z80 I O device RET NC NC Returns from service routine or returns from Interrupt service routine for a non Z80 I O device EI 1 1 DI 0 0 LD A I or LD R I NC NC IEF2 value is copied to P V F...

Page 218: ...to increase software reliability or to implement extended instructions An undefined opcode can be fetched from the instruction stream or it can be returned as a vector in an Interrupt acknowledge tra...

Page 219: ...a bus contents are ignored by theZ380MPU TheinterruptedPCvalueispushedontothe stack The size of the PC value pushed onto the stack is depends on Native one word or Extended mode two words in effect Th...

Page 220: ...onto both portions of the data bus D15 D8 and D7 D0 in the transactions Regardless of the Interrupt Mode in effect interrupts on INT3 INT1 is always handled by the Assigned Interrupt Mode This mode i...

Page 221: ...6 Internet http www zilog com 1994 1995 1996 1997 by Zilog Inc All rights reserved No part of this document may be copied or reproduced in any form or by any means without the prior written consent of...

Page 222: ...LK input must be stable for more than five cycles with RESET held Low The Z380 CPU proceeds to fetch the first instruction 3 5 BUSCLK cycles after RESET is deasserted provided such deassertion meets t...

Page 223: ...lected AF Main Bank IX IY Native Mode Maskable Interrupts Disabled in Mode 0 Bus Request Lock Off A and F Registers Register Banks 3 0 A F A F Unaffected Register Extensions 0000 Register Bank 0 BCz D...

Page 224: ...http www zilog com 1994 1995 1996 1997 by Zilog Inc All rights reserved No part of this document may be copied or reproduced in any form or by any means without the prior written consent of Zilog Inc...

Page 225: ...ormat 2 is for instructions with an opcode escape byte Format 3 is for instructions whose opcode escape byte has the value 0CBH and Format 4 is for instructions whose escape bytes are 0ED followed by...

Page 226: ...code 1 byte Displacement LD A IX d DD 7E disp A esc Opcode Immediate LD IX nn DD 21 n L n H A esc Opcode 1 byte Displacement Immediate LD IY d n FD 36 d n Note A esc is an addressing mode escape byte...

Page 227: ...http www zilog com 1994 1995 1996 1997 by Zilog Inc All rights reserved No part of this document may be copied or reproduced in any form or by any means without the prior written consent of Zilog Inc...

Page 228: ...iateDecoderDirectives Extended mode orNativemode ofoperation and WordorLong Word mode of operation I means the instruction can be used with DDIR IM to expand its immediate constant X means that the op...

Page 229: ...IYL FD 85 ADD A IYU FD 84 ADD A L 85 ADD HL 1234H I X ED C6 34 12 ADD HL BC X 09 ADD HL DE X 19 ADD HL HL X 29 Source Code Mode Object Code ADD HL SP X 39 ADD IX BC X DD 09 ADD IX DE X DD 19 ADD IX I...

Page 230: ...3 IX 12H I DD CB 12 5E BIT 3 IY 12H I FD CB 12 5E BIT 3 A CB 5F BIT 3 B CB 58 BIT 3 C CB 59 Source Code Mode Object Code BIT 3 D CB 5A BIT 3 E CB 5B BIT 3 H CB 5C BIT 3 L CB 5D BIT 4 HL CB 66 BIT 4 I...

Page 231: ...CP IY 12H I FD BE 12 CP 12H FE 12 CP A BF CP A HL BE CP A IX 12H I DD BE 12 CP A IY 12H I FD BE 12 CP A 12H FE 12 CP A A BF CP A B B8 CP A C B9 CP A D BA CP A E BB CP A H BC CP A IXL DD BD CP A IXU DD...

Page 232: ...EX A A ED 3F EX A A CB 37 EX A B ED 07 EX A C ED 0F EX A D ED 17 EX A E ED 1F EX A H ED 27 EX A L ED 2F EX AF AF 08 EX B B CB 30 Source Code Mode Object Code EX BC BC L ED CB 30 EX BC DE L ED 05 EX BC...

Page 233: ...12 Source Code Mode Object Code JR C 12H X 38 12 JR NC 123456H X FD 30 56 34 12 JR NC 1234H X DD 30 34 12 JR NC 12H X 30 12 JR NZ 123456H X FD 20 56 34 12 JR NZ 1234H X DD 20 34 12 JR NZ 12H X 20 12 J...

Page 234: ...06 12 LD B A 47 LD B B 40 LD B C 41 LD B D 42 LD B E 43 LD B H 44 LD B IXL DD 45 LD B IXU DD 44 LD B IYL FD 45 LD B IYU FD 44 LD B L 45 Source Code Mode Object Code LD BC 1234H I L ED 4B 34 12 LD BC...

Page 235: ...D IX IY 12H I L FD CB 12 23 LD IX SP 12H I L DD CB 12 21 LD IX 1234H I L DD 21 34 12 LD IX BC L DD 07 LD IX DE L DD 17 Source Code Mode Object Code LD IX HL L DD 37 LD IX IY L DD 27 LD IXL 12H DD 2E 1...

Page 236: ...IY 12H I FD CB 12 9A MULTUW HL 1234H ED CB 9F MULTUW HL BC ED CB 98 MULTUW HL DE ED CB 99 MULTUW HL HL ED CB 9B MULTUW HL IX ED CB 9C MULTUW HL IY ED CB 9D MULTUW IX ED CB 9C MULTUW IY ED CB 9D Source...

Page 237: ...POP DE L D1 POP HL L E1 POP IX L DD E1 POP IY L FD E1 POP SR L ED C1 PUSH 1234H I L FD F5 34 12 Source Code Mode Object Code PUSH AF L F5 PUSH BC L C5 PUSH DE L D5 PUSH HL L E5 PUSH IX L DD E5 PUSH I...

Page 238: ...X E8 RET Z X C8 RET X C9 RETI X ED 4D RETN X ED 45 RL HL CB 16 RL IX 12H I DD CB 12 16 RL IY 12H I FD CB 12 16 Source Code Mode Object Code RL A CB 17 RL B CB 10 RL C CB 11 RL D CB 12 RL E CB 13 RL H...

Page 239: ...4H ED 9E 34 12 SBCW BC ED 9C SBCW DE ED 9D SBCW HL ED 9F SBCW HL IX 12H DD DE 12 Source Code Mode Object Code SBCW HL IY 12H FD DE 12 SBCW HL 1234H ED 9E 34 12 SBCW HL BC ED 9C SBCW HL DE ED 9D SBCW H...

Page 240: ...SLA L CB 25 SLAW HL ED CB 22 SLAW IX 12H I DD CB 12 22 SLAW IY 12H I FD CB 12 22 SLAW BC ED CB 20 SLAW DE ED CB 21 Source Code Mode Object Code SLAW HL ED CB 23 SLAW IX ED CB 24 SLAW IY ED CB 25 SLP...

Page 241: ...ED 1C TST H ED 24 TST L ED 2C TSTIO 12H ED 74 12 XOR HL AE XOR IX 12H I DD AE 12 XOR IY 12H I FD AE 12 XOR 12H EE 12 XOR A AF XOR A HL AE XOR A IX 12H I DD AE 12 XOR A IY 12H I FD AE 12 XOR A 12H EE...

Page 242: ...http www zilog com 1994 1995 1996 1997 by Zilog Inc All rights reserved No part of this document may be copied or reproduced in any form or by any means without the prior written consent of Zilog Inc...

Page 243: ...Extended mode orNativemode ofoperation and WordorLong Word Mode of operation I means the instruction can be used with DDIR IM to expand its immediate constant X means that the operation of the instruc...

Page 244: ...EC H 26 12 LD H 12H 27 DAA 28 12 JR Z 12H X 29 ADD HL HL X 2A 34 12 LD HL 1234H I L 2B DEC HL X 2B DECW HL X 2C INC L 2D DEC L 2E 12 LD L 12H 2F CPL A Object Code Source Code Mode 2F CPL 30 12 JR NC 1...

Page 245: ...C A L 8E ADC A HL 8F ADC A A 90 SUB A B 91 SUB A C 92 SUB A D 93 SUB A E 94 SUB A H 95 SUB A L 96 SUB A HL 97 SUB A A 98 SBC A B Object Code Source Code Mode 99 SBC A C 9A SBC A D 9B SBC A E 9C SBC A...

Page 246: ...B 12 RL D CB 13 RL E CB 14 RL H CB 15 RL L CB 16 RL HL CB 17 RL A CB 18 RR B CB 19 RR C Object Code Source Code Mode CB 1A RR D CB 1B RR E CB 1C RR H CB 1D RR L CB 1E RR HL CB 1F RR A CB 20 SLA B CB 2...

Page 247: ...7F BIT 7 A CB 80 RES 0 B CB 81 RES 0 C CB 82 RES 0 D CB 83 RES 0 E CB 84 RES 0 H CB 85 RES 0 L CB 86 RES 0 HL Object Code Source Code Mode CB 87 RES 0 A CB 88 RES 1 B CB 89 RES 1 C CB 8A RES 1 D CB 8...

Page 248: ...F1 SET 6 C CB F2 SET 6 D Object Code Source Code Mode CB F3 SET 6 E CB F4 SET 6 H CB F5 SET 6 L CB F6 SET 6 HL CB F7 SET 6 A CB F8 SET 7 B CB F9 SET 7 C CB FA SET 7 D CB FB SET 7 E CB FC SET 7 H CB F...

Page 249: ...L DD 5D LD E IXL DD 5D LD E IYL DD 5E 12 LD E IX 12H I DD 60 LD IXU B DD 61 LD IXU C DD 62 LD IXU D Object Code Source Code Mode DD 63 LD IXU E DD 64 LD IXU IXU DD 65 LD IXU IXL DD 66 12 LD H IX 12H...

Page 250: ...de Source Code Mode DD CB 12 2B LD IX 12H IY I L DD CB 12 2E SRA IX 12H I DD CB 12 31 LD HL SP 12H I L DD CB 12 33 LD HL IX 12H I L DD CB 12 39 LD SP 12H HL I L DD CB 12 3A SRLW IX 12H I DD CB 12 3B L...

Page 251: ...2H B ED 02 LD BC BC L ED 03 EX BC IX L ED 04 TST B ED 05 EX BC DE L ED 06 34 12 LDW BC 1234H I L ED 07 EX A B ED 08 12 IN0 C 12H ED 09 12 OUT0 12H C ED 0B EX BC IY L ED 0C TST C ED 0D EX BC HL L ED 0E...

Page 252: ...6 34 12 ADDW HL 1234H ED 87 ADDW HL ED 87 ADDW HL HL ED 8B OTDM ED 8C ADCW BC ED 8C ADCW HL BC ED 8D ADCW DE Object Code Source Code Mode ED 8D ADCW HL DE ED 8E 34 12 ADCW 1234H ED 8E 34 12 ADCW HL 12...

Page 253: ...ED CB 20 SLAW BC ED CB 21 SLAW DE ED CB 22 SLAW HL ED CB 23 SLAW HL ED CB 24 SLAW IX ED CB 25 SLAW IY Object Code Source Code Mode ED CB 28 SRAW BC ED CB 29 SRAW DE ED CB 2A SRAW HL ED CB 2B SRAW HL E...

Page 254: ...RET S X F9 LD SP HL L FA 34 12 JP M 1234H I X Object Code Source Code Mode FA 34 12 JP S 1234H I X FB EI FC 34 12 CALL S M 1234H I X FD 01 LD BC IY L FD 02 LD BC HL L FD 03 LD IY BC L FD 07 LD IY BC...

Page 255: ...HL IY FD 8F ADCW IY FD 94 SUB A IYU FD 95 SUB A IYL FD 96 12 SUB A IY 12H I FD 97 SUBW HL IY Object Code Source Code Mode FD 97 SUBW IY FD 9C SBC A IYU FD 9D SBC A IYL FD 9E 12 SBC A IY 12H I FD 9F SB...

Page 256: ...IVUW IY 12H I FD CB 12 BA DIVUW HL IY 12H I FD CB 12 BE RES 7 IY 12H I FD CB 12 C6 SET 0 IY 12H I FD CB 12 CE SET 1 IY 12H I FD CB 12 D6 SET 2 IY 12H I FD CB 12 DE SET 3 IY 12H I FD CB 12 E6 SET 4 IY...

Page 257: ...http www zilog com 1994 1995 1996 1997 by Zilog Inc All rights reserved No part of this document may be copied or reproduced in any form or by any means without the prior written consent of Zilog Inc...

Page 258: ...able in the Appendix B The Table D 1 has the instructions which works differently in the Native and Extended mode of operation and the Table D 2 has the instructions which works differently in Word Lo...

Page 259: ...ALR PO 123456H FD E4 56 34 12 CALR PO 1234H DD E4 34 12 CALR PO 12H ED E4 12 CALR Z 123456H FD CC 56 34 12 CALR Z 1234H DD CC 34 12 CALR Z 12H ED CC 12 CPD ED A9 CPDR ED B9 CPI ED A1 CPIR ED B1 DEC BC...

Page 260: ...E BC FD 0D LD DE DE FD 1D LD DE HL FD 3D LD DE IX DD 11 LD DE IY FD 11 LD HL BC FD 0F LD HL DE FD 1F LD HL HL FD 3F LD HL IX DD 31 LD HL IY FD 31 LD BC BC DD 0C LD BC DE DD 0D LD BC HL DD 0F LD BC BC...

Page 261: ...gnificant injury to the user Zilog Inc 210 East Hacienda Ave Campbell CA 95008 6600 Telephone 408 370 8000 Telex 910 338 7621 FAX 408 370 8056 Internet http www zilog com 1994 1995 1996 1997 by Zilog...

Page 262: ...P 123456H ED 92 56 34 12 Table E 2 Valid with DDIR IB XM bit status does not affect the operation Transfer size determined by LW bit Either with DDIR IB DDIR IB LW or DDIR IB W LD 123456H BC ED 43 56...

Page 263: ...7 IY 1234H FD CB 34 12 7E CP IX 1234H DD BE 34 12 CP IY 1234H FD BE 34 12 CP A IX 1234H DD BE 34 12 CP A IY 1234H FD BE 34 12 CPW IX 1234H DD FE 34 12 CPW IY 1234H FD FE 34 12 CPW HL IX 1234H DD FE 3...

Page 264: ...CB 34 12 0A RRW IX 1234H DD CB 34 12 1A RRW IY 1234H FD CB 34 12 1A SBC A IX 1234H DD 9E 34 12 SBC A IY 1234H FD 9E 34 12 SBCW IX 1234H DD DE 34 12 SBCW IY 1234H FD DE 34 12 SET 0 IX 1234H DD CB 34 1...

Page 265: ...ED 63 78 56 34 12 LD 12345678H IX DD 22 78 56 34 12 LD 12345678H IY FD 22 78 56 34 12 LD 12345678H SP ED 73 78 56 34 12 LD IX 123456H BC DD CB 56 34 12 0B LD IX 123456H DE DD CB 56 34 12 1B LD IX 1234...

Page 266: ...2 CP IY 123456H FD BE 56 34 12 CP A IX 123456H DD BE 56 34 12 CP A IY 123456H FD BE 56 34 12 CPW IX 123456H DD FE 56 34 12 CPW IY 123456H FD FE 56 34 12 CPW HL IX 123456H DD FE 56 34 12 CPW HL IY 1234...

Page 267: ...123456H DD CB 56 34 12 86 RES 0 IY 123456H FD CB 56 34 12 86 RES 1 IX 123456H DD CB 56 34 12 8E RES 1 IY 123456H FD CB 56 34 12 8E RES 2 IX 123456H DD CB 56 34 12 96 RES 2 IY 123456H FD CB 56 34 12 9...

Page 268: ...http www zilog com 1994 1995 1996 1997 by Zilog Inc All rights reserved No part of this document may be copied or reproduced in any form or by any means without the prior written consent of Zilog Inc...

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