SGS ATES Z80 Скачать руководство пользователя страница 272

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RRCA

RRD

RST P

SBC

A.8

SCF
SET b.(HL)
SET b.(IX+d)

SET b.(IY+d)

SET b.r
SLA m
SRA m
SRL m

SUB

XOR

Rotate

right

circular

Ace ••••••••••••••

150

Rotate

digit

r~ght

and

left

between

Ace.

and

location

(HL) ••••••••••

182

Restart

to location

p •••••••••••••••••••

234

Subtract

operand

from

Ace.

with

carry ••••••••••••••••••••

Subtract

Reg.

pair

from

1 the

a r r

y • • • • • • • • • • • • • • • • • • • • • • • • • ••

132

Set

carry

flag

(C·l)

••••••••••••••••••••

118

Set

Bit

cat

ion

(H L) • • • • • • • • • • • • ••

195

Set

Bit

location

(IX+d)

••••••••••••

196

Set

Bit b of location

(IY+d) ••••••••••••

198

Set

Bit

Reg.

r.....................

194

Shift

operand

m left

arithoetic

•••••••••

171

Shift

operand

m right

arithmetic

••••••••

174

Shift

operand

m right

logical...........

177

Subtract

operand

from

Ace ••••••••••••

Exclusive

'OR'

operand

and

Ace.

2-10

- 6

2- 8

- 7

- 8

7-1

- 7

- 7-

2- 4

Information

furnished

s believed to be accurate

and reliable

However

no resp

nsibility

is assumed fo

the c

nsequen

ces

of i

se n

for an infringement

of patents or other rights of third parties which may result from its use

No license is granted b

impl

icat

the

r·

wis

under any patent

or patent

rights of SGS-ATES.

This pub

ication

supersedes

nd substitutes

all information

pre

SGS - ATES GROUP OF COMPANIES

Italy - France - Germany - Singapore

- Sweden - United Kingdom - U

S.A.

Printed in Italy by permission of Zilog Inc

"'"

Содержание ATES Z80

Страница 1: ......

Страница 2: ...the Z80 CPU is not intended exclusively as an application support for the device itself but forms the second part of the instruction manual for SGS ATES CLZ80 microcomputer which is based on the Z80 m...

Страница 3: ...h M cycle For exanple is Total indicates that the instruction consists of 2 nachine cycles ihe first cycle contains 4 clock periods T States The second cycle contains 3 clock periods for a total of 7...

Страница 4: ...SEARCH GROUP 55 2 3 8 BIT ARITHMETIC AND LOGICAL GROUP 79 2 4 GENERAL PURPOSE ARITHMETIC AND CPU CONTROL GROUPS 111 2 5 16 BIT ARITHMETIC GROUP 127 2 6 ROTATE AND SHIFT GROUP 145 2 7 BIT SET RESET AN...

Страница 5: ......

Страница 6: ...Juanlurn c cc r 11 SoJt 391262 Jr ml tOl...

Страница 7: ...any other register r Note r r identifies any of the registers A B C D E li or L assembled as follows in the object code A 111 B 000 COOl DOlO E 011 li 100 L 101 If the li register contains the number...

Страница 8: ...a o r 01 I in 1 The eight bit integer n is loaded into any register r where r identifies register A n C D E H or L assembled as follows in the object code Register r A 111 B 000 C 001 D 010 E 011 H 10...

Страница 9: ...loaded into register r where r identifies register A B C D E H or L assembled as follo ls in the object code A 111 BODO COOl DOlO E 011 H 100 L 101 If register pair HL contains the number 7SA1H and me...

Страница 10: ...egister IX summed with a displacement integer d is loaded into register r where r identifies register A B C D E H or L assembled as follows in the object code Register r A III B 000 C 001 D 010 E 011...

Страница 11: ...will cause the calculation of the sum 25AFH 19H which points to memory location 25C8H If this address contains byte 39H the ins truction will result in register B also containing 39H...

Страница 12: ...perand IY d the contents of the Index Register IY sUQQed with a displacement integer d is loaded into register r where r identifies register A n C D E H or L assembled as follows in the object code A...

Страница 13: ...contains the number 2SAFll the instruction will cause the calculation of the sum 2SAFll 19H which points to memory location 2SC8H If this address contains byte 39H the instruction will result in regis...

Страница 14: ...he contents of the ilL register pair The symbol r identifies register A B C D E il or L assembled as follows in the object code A 111 B 000 COOl DOlO E all H 100 L 101 If the contents of register pair...

Страница 15: ...ed into the memory address specified by the contents of Index Register IX summed with d a two s complement displacement integer The symbol r identifies register A B C D E H or L assembled as follows i...

Страница 16: ...If the C register contains the byte lCH and the Index Register IX contains 3100H then the instruction will perform the sum 3100H 6H and will load lCH into memory location 3106H...

Страница 17: ...r are loaded into the memory address specified by the sum of the contents of the Index Register IY and d a two s complenent displacenent integer The symbol r is specified according to the following t...

Страница 18: ...If the C register contains the byte 48H and the Index Register IY contains 2AIIH then the instruction will perform the sum 2AIIH 4H and will load 48H into memory location 2A15...

Страница 19: ...LD HLJ I0 0 a 0 I 36 I In 1 Integer n is loaded into the memory address specified by the contents of the HL register pair will result in the memory location 4444H containing the byte 281I...

Страница 20: ...oaded into the memory address specified by the sum of the contents of the Index Register IX and the two s complement displacement operand d If the Index Register IX contains the number 219AH the instr...

Страница 21: ...a a a I 36 1 I 1 In I Integer n is loaded into the memory location specified by the contents of the Index Register sUDDed with a displacement integer d If the Index Register IY contains the number A9...

Страница 22: ...he memory location specified by the contents of the BC register pair are loaded into the AccuJ lulator If the BC register pair contains the number 4747H and J leJ lory address 4747H contains the byte...

Страница 23: ...ntents of the memory location specified by the reg ster pair DE are loaded into the Accumulator If the DE register pair contains the number 30A2H and memory address 30A2H contains the byte 22H then th...

Страница 24: ...In 1 The contents of the memory location specified operands nn are loaded into the Accumulator n operand is the low order byte of a two byte address by the The first memory If the contents of nn is n...

Страница 25: ...The contents of the Accumulator are loaded into the memory location specified by the contents of the register pair BG If the Accumulator contains 7AH and the BG register pair contains 1212H the instr...

Страница 26: ...A The contents of the Accuflulator are loaded into the memory location specified by the DE register pair If the contents of register pair DE are ll28H and the Accuculator contains byte AOH the instru...

Страница 27: ...ontents of the Accumulator are loaded into the memory address specified by the operands nn The first n operand in the assembled object code above is the low order byte of nn If the contents of the Acc...

Страница 28: ...ctor Register I are loaded into the Accumulator Set if I Reg is negative reset otherwise Set if I Reg is zero reset otherwise Reset Contains contents of IFF2 Reset Not affected II P V N C If the Inter...

Страница 29: ...Register R are loaded into the Accumulator Set if R Reg is negative reset otherwise Set if R Reg is zero reset otherwise Re se t Contains contents of IFF2 Re se t Not affected H P V N C If the Memory...

Страница 30: ...LD A I a a I ED I a a a a I 47 The contents of the Accunulator are loaded into the Interrupt Control Vector Register I If the Accumulator contains the number B1R after the instruction...

Страница 31: ...LD R A I a a I ED I a a a I 4F The contents of the Accumulator are loaded into the Memory Refresh register R If the Accumulator contains the number B4H after the instruction...

Страница 32: ......

Страница 33: ...two byte integer nn is loaded into the dd register pair where dd defines the BC DE HL or SP register pairs assembled as follows in the object code BC 00 DE 01 HL 10 SP 11 The first n operand in the a...

Страница 34: ...LD IX I a a I DO Ia a a a a a I 21 I in I I in I Integer nn is loaded into the Index Register IX The first n operand in the assembled object code above is the low order byte...

Страница 35: ...LD IY 11 1 1 0 1 FD I 0 0 0 0 0 0 1 I 21 I I In I I 1 I In I I 1 Integer nn is loaded into the Index Register IY The first n operand in the assembled object code above is the low order byte...

Страница 36: ...on of register pair HL register L and the contents of the next highest memory address nn l are loaded into the high order portion of ilL register H The first n operand in the assembled object code abo...

Страница 37: ...register pair dd and the contents of the next highest memory address nn l are loaded into the high order portion of dd Register pair dd defines BC DE HL or SP register pairs assembled as follows in t...

Страница 38: ...If Address 2130ll contains 65ll and address 2131H contains 78ll after the instruction...

Страница 39: ...the low order portion of Index Register IX and the contents of the next highest menory address nn l are loaded into the high order portion of IX The first n operand in the assembled object code above...

Страница 40: ...10 order portion of Index Register IY and the content the next highest cemory address nn l are loaded il the high order portion of IY The first n operand il assembled object code above is the low ord...

Страница 41: ...s nn and the contents of the high order portion of ilL register II are loaded into the next highest memory address nn l The first n operand in the assembled object code above is the low order byte of...

Страница 42: ...loaded into memory address nn the upper byte is loaded into memory address nn 1 Register pair dd defines either BC DE HL or SP assembled as follows in the object code Pair dd BC 00 DE 01 HL 10 SP 11...

Страница 43: ...If register pair BG contains the number 4644H the instruc tion will result in 44H in memory location lOOOH and 46H in memory location lOOlH...

Страница 44: ...to memory address nn the upper order byte is loaded into the next highest address nn l The first n operand in the assembled object code above is the low order byte of nn If the Index Register IX conta...

Страница 45: ...o memory address nn the upper order byte is loaded into memory location nn l The first n operand in the assembled object code above is the low order byte of nn If the Index Register IY contains 4174H...

Страница 46: ...LD SP HL The contents of the register pair HL are loaded into the Stack Pointer SP If the register pair ilL contains 442EH after the instruction...

Страница 47: ...LD SP IX I 0 a I DO I a a 1 I F9 The two byte contents of Index Register IX are loaded into the Stack Pointer SP If the contents of the Index Register IX are 98DAH after the instruction...

Страница 48: ...LD SP IY 11 a I FD 11 a a I F9 The two byte contents of Index Register IY are loaded into the Stack Pointer SP If Index Register IY contains the integer A227U after the instruction...

Страница 49: ...w specified by the SP then decrements the SP again and loads the low order byte of qq into the memory location corresponding to this new address in the SP The operand qq means register pair BC DE HL o...

Страница 50: ...rst decrements the SP and loads the high order byte of IX into the memory address now specified by the SP then decrements the SP again and loads the low order byte into the memory location correspondi...

Страница 51: ...st decrecents the SP and loads the high order byte of IY into the memory address now specified by the SP then decrements the SP again and loads the low order byte into the ce ory location correspondin...

Страница 52: ...instruction first loads into the low order portion of qq the byte at the memory location corresponding to the contents of SP then SP is incremented and the contents of the corresponding adjacent menor...

Страница 53: ...the Stack Pointer contains 1000H memory location 1000H contains 55H and location 1001H contains 33H the instruction will result in register pair HL containing 3355H and the Stack Pointer containing 10...

Страница 54: ...the low order portion of IX the byte at the memory location corresponding to the contents of SP then SP is incremented and the contents of the corresponding adjacent memory location are loaded into t...

Страница 55: ...ow order portion of IY the byte at the memory location corresponding to the contents of SP then SP is incremented and the contents of the corresponding adjacent Qemory location are loaded into the hig...

Страница 56: ......

Страница 57: ...and HL are exchanged If the content of register pair DE is the number 2822H and the content of the register pair HL is number 499AH after the instruction the content of register pair DE will be 499AH...

Страница 58: ...are exchanged Note register pair AF consists of registers A and F If the content of register pair AF is number 9900H and the content of register pair AF is number 5944H after the instruction the cont...

Страница 59: ...If the contents of register pairs BC DE and HL are the numbers 445AH 3DA2H and 88590 respectively and the contents of register pairs BC DE and HL are 0988H 9300H and OOE7H respectively after the inst...

Страница 60: ...ext highest memory address SP l If the HL register pair contains 7012ll the SP register pair contains 8856H the memory location 8856H contains the byte IlH and the memory location 8857H contains the b...

Страница 61: ...is exchanged with the next highest memory address SP l If the Index Register IX contains 3988H the SP register pair contains olooH the memory location olooH contains the byte 90H and memory location...

Страница 62: ...s exchanged with the next highest memory address SP l If the Index Register IY contains 3988H the SP register pair contains 0100ll the memory location 0100H contains the byte 90ll and memory location...

Страница 63: ...the contents of the HL register pair to the memory location addressed by the contents of the DE register pair Then both these register pairs are incremented and the BC Byte Counter register pair is de...

Страница 64: ...s the byte BSH the DE register pair contains 2222H the memory location 2222H contains byte 66ll and the BC register pair contains 7H then the instruc tion will result in the following contents in regi...

Страница 65: ...airs are incremented and the BC Byte Counter register pair is decremented If decreoenting causes the BC to go to zero the instruction is terminated If BC is not zero the progra counter is decremented...

Страница 66: ...DE register pair contains 2222H the BC register pair contains 0003H and memory locations have these contents llllH 1112H l113H 88H 36ll A5H 2222ll 2223H 2224H 66H 59H C5H the contents of register pai...

Страница 67: ...eidressed by the contents of the HL register pair to the memory location addressed by the contents of the DE register pair Then both of these register pairs including the BC Byte Counter register pai...

Страница 68: ...the byte 88H the DE register pair contains 2222H memory location 2222H contains byte 66H and the BC register pair contains 7H then the in str uc tion will result in the following contents in register...

Страница 69: ...Byte Counter are decremented If decrementing causes the BC to go to zero the instruction is ter inated If BC is not zero the progra counter is decre ented by 2 and the instruction is repeated Note tha...

Страница 70: ...C register pair contains 0003H and memory locations have these contents l114H l113H l112H A5H 36H SSH 2225Il 2224H 2223H C5Il 59H 66H the contents of register pairs and memory locations will be HL lll...

Страница 71: ...HL is incremented and the Byte Counter register pair BC is decremented Set if result is negative reset otherwise Set if A llL reset otherwi5e Set ifthere is a borrow and reset otherwise Set if BC L fO...

Страница 72: ...contain OOOOH the HL register pair will contain 1112H the Z flag in the F register will be set and the P V flag in the F register will be reset There will be no effect on the contents of the Accumula...

Страница 73: ...register pair BC is decremented If decrementing causes the BC to go to zero or if A HL the instruction is terminated If BC is not zero and A HL the program counter is decremented by 2 and the instruc...

Страница 74: ...d If the ilL register pair contains 1111il the Accumulator contains F3il the Byte Counter contains On07H and memory locations have these contents 111111 52il 111211 OOil 1113H F3il the contents of reg...

Страница 75: ...et The ilL and the Byte Counter register pair BC are decremented Set if result is negative reset otherwise Set if A HL reset otherwise Set if there is a borrow and reset otherwise Set if BC l oio rese...

Страница 76: ...contain OOOOH the HL register pair will contain IIIOH the Z flag in the F register will be set and the P V flag in the F register will be reset There will be no effect on the contents of the Accumula...

Страница 77: ...pairs are decremented If decrementing causes the BC to go to zero or if A HL the instruction is terminated If BC is not zero and AI HL the program counter is decremented by 2 and the instruction is re...

Страница 78: ...cted If the HL register pair contains 1118H the Accumulator contains F3H the Byte Counter contains 0007H and memory locations have these contents 1118H 1117H 1116H 52H OOH F3H the contents of register...

Страница 79: ......

Страница 80: ......

Страница 81: ...identifies the registers A B C D E H or L assembled as follows in the object code Register r A 111 B 000 C 001 D 010 E 011 H 100 L 101 Set if result is negative reset otherwise Set if result is zero r...

Страница 82: ...If the contents of the Accumulator are 44H and the contents of register Care IlH after the execution of...

Страница 83: ...lts are stored in the Accumulator Set if result is negative reset otherwise Set if result is zero reset otherwise Set if carry from Bit 3 reset otherwise Set if overflow reset otherwise Reset Set if c...

Страница 84: ...T 1 75 Condi tion Bits Affected S Set if result is negative reset otherwise Z Set if result is zero reset otherwise H Se t if carry from Bit 3 reset otherwise P V Set if overflow reset otherwise N Re...

Страница 85: ...n added to the contents of the Accumulator and the result is stored in the Accumulator Set if result is negative reset otherwise Set if result is zero reset otherwise Set if carry from Bit 3 reset oth...

Страница 86: ...10050 is 220 after the execution of ADD A IX SH the contents of the Accumulator will be 33H...

Страница 87: ...en added to the contents of the Accumulator and the result is stored in the AccuQulator Set if result is negative reset otherwise Set if result is zero reset otherwise Set if carry from Bit 3 reset ot...

Страница 88: ......

Страница 89: ...r the analogous ADD instruction These various possible opcode operand combinations are assembled as follows in the object code 11 0 0 0 1 r I I a a 0 I CE in 1 I a a a 0 I 8E I 0 a I DD I a a a 0 8E I...

Страница 90: ...3 1 75 ADC A HL 2 7 4 3 1 75 ADC A IX d 5 19 4 4 3 5 3 4 75 ADC A IY d 5 19 4 4 3 5 3 4 75 Condi tion Bits Affected Set if result is negative reset otherwise Set if result is zero reset otherwise Set...

Страница 91: ...These various possible opcode operand combinations are assembled as follows in the object code I 0 a a r I a a 0 06 1 In l I a a a 0 96 11 1 0 1 1 1 0 1 DO I a a a 0 96 I 1 a 1 FD I 0 0 0 a I 96 1 1...

Страница 92: ...0 SUB n 2 7 4 3 1 75 SUB ilL 2 7 4 3 1 75 SUB IX d 5 19 4 4 3 5 3 4 75 SUB IY d 5 19 4 4 3 5 3 4 75 Condition Bits Affected Set if result is negative reset otherwise Set if result is zero reset otherw...

Страница 93: ...fined for the analogous ADD instructions These various possible opcode operand combinations are assembled as follows in the object code 11 a a r 1 11 0 0 I 1 In I 1 0 0 1 1 a 0 I a 0 0 I d I I 11 0 I...

Страница 94: ...3 1 75 SBC A HL 2 7 4 3 1 75 SBC A IX d 5 19 4 4 3 5 3 4 75 SBC A IY d 5 19 4 4 3 5 3 4 75 Condition Bits Affected Set if result is negative reset other iise Set if result is zero reset otherwise Set...

Страница 95: ...instructions These various possible opcode operand combinations are assembled as follows in the object code 1 a a a r 1 a a 0 E6 In a a 0 0 A6 1 a a DO a a a 0 A6 1 0 1 FD 0 0 0 0 1 A6 I r identifies...

Страница 96: ...STRUCTION H CYCLES T STATES 4 11HZ E T AND r 1 4 1 00 AND n 2 7 4 3 1 75 AND HL 2 7 4 3 1 75 AND IX d 5 19 4 4 3 5 3 4 75 AND IX d 5 19 4 4 3 5 3 4 75 Condition Bits Affected Set if result is negative...

Страница 97: ...tions These various possible opcode operand conbinations are assembled as follows in the object code 0 o r 1 0 0 I F6 in I 0 1 0 0 I 86 1 1 0 1 1 1 0 1 DO 1 0 0 a 86 I l I 1 1 0 1 FD I a a 0 B6 I r id...

Страница 98: ...STRUCTION 1 1 CYCLES T STATES 4 MHZ E T OR r 1 4 1 00 OR n 2 7 4 3 1 75 OR HL 2 7 4 3 1 75 OR IX d 5 19 4 4 3 5 3 4 75 OR IY d 5 19 4 4 3 5 3 4 75 Condi tion Bits Affected Set if result is negative re...

Страница 99: ...ions These various possible opcode operand combinations are assembled as follows in the object code I a a l r 1 1 a 0 I EE 1 In 1 I a a 0 I AE I a a I DO I a a a I AE 1 1 1 a I FD I a a 0 I AE 1 1 r i...

Страница 100: ...d in the Accumulator INSTRUCTION M CYCLES T STATES 4 MHZ E T XOR r 1 4 1 00 XOR n 2 7 4 3 1 75 XOR HL 2 7 4 3 1 75 XOR IX d 5 19 4 4 3 5 3 4 75 XOR IY d 5 19 4 4 3 5 3 4 75 Condition Bits Affected Set...

Страница 101: ...DD instructions These various possible opcode operand combinations are assembled as follows in the object code o r 1 a I FE In 1 1 a a I BE a a I DD 1 a a I BE I 1 a I FD I 0 aI BE 1 1 r identifies re...

Страница 102: ...2 7 4 3 1 75 CP IX d 5 19 4 4 3 5 3 4 75 CP IY d 5 19 4 4 3 5 3 4 75 Set if result is negative reset otherwise Set if result is zero reset otherwise Set ifthere is a borrow and reset otherwise Set if...

Страница 103: ...ect code Register r A 111 B 000 C 001 D 010 E 011 H 100 L 101 M CYCLES T STATES 4 4 HHZ E T 1 00 Condition Bits Affected Set if result is negative reset otherwise Set if result is zero reset otherwise...

Страница 104: ...If the contents of register Dare 280 after the execution of...

Страница 105: ...Set if result is negative reset otherwise Set if result is zero reset otherwise Set if carry from Bit 3 reset otherwise Set if HL was 7FH before operation reset otherwise Re se t Not Affected If the c...

Страница 106: ...o s complement displacement integer d to point to an address in memory The contents of this address are then incremented Set if result is negative reset otherwise Set if result is zero reset otherwise...

Страница 107: ...If the contents of the Index Register pair IX are 2020H and the Demory location 2030H contains byte 348 after the execution of...

Страница 108: ...o s cOQplement displacement integer d to point to an address in memory The contents of this address are then incremented Set if result is negative reset otherwise Set if result is zero reset otherwise...

Страница 109: ...If the contents of the Index Register pair IY are 2020H and the memory location 2030H contain byte 34H after the execution of...

Страница 110: ...nalogous INC instructions These various possible opcode operand combinations are assembled as follows in the object code o a r a 1 o 0 1 1 0 1 0 1 1 0 0 0 0 o 0 1 1 0 1 0 1 d r identifies registers B...

Страница 111: ...C IX d 6 23 4 4 3 5 4 3 5 75 DEC IY d 6 23 4 4 3 5 4 3 5 75 Condition Bits Affected Set if result is negative reset otherwise Set if result is zero reset otherwise Set ifthere is a borrow and re set o...

Страница 112: ......

Страница 113: ...n performed HEX HEX VALUE VALUE NUHBER C IN 11 IN ADDED C BEFORE UPPER BEFORE LOWER TO AFTER OPERATION DAA DIGIT DAA DIGIT BYTE DAA bit b it 7 4 3 0 0 0 9 0 0 9 00 0 0 0 8 0 A F 06 0 0 0 9 1 0 3 06 0...

Страница 114: ...See instruction If an addition operation is performed between 15 BCD and 27 BCD simple decimal arithmetic gives this result 15 27 42 But yhen the binary representations are added in the Accumulator a...

Страница 115: ...lator register A are inverted l s complement Condition Bits Affected S No t affected Z Not affected H Se t P V Not affected N Set C No t affected Example If the contents of the Accumulator are 1011 01...

Страница 116: ...cting the contents of the Accumulator from zero Note that 80H is left unchanged Set if result is negative reset otherwise Set if result is zero reset otherwise Set ifthere is a borrow and reset otherw...

Страница 117: ...Example If the contents of the Accumulator are...

Страница 118: ...CCF S z H P V H c Not affected Not affected Previous carry will be copied Not affected Reset Set if CY was 0 before operation reset otherwise...

Страница 119: ...SCF S z H P V N C Not affected Not affected Rese t Not affected Re se t Set...

Страница 120: ...NOP Operation Format Opcode NOP Description CPU perforos no operation during this machine cycle M CYCLES 1 T STATES 4 Condition Bits Affected...

Страница 121: ...HALT The HALT instruction suspends CPU operation until a subsequent interrupt or reset is received While in the halt state the processor will execute NOP s to maintain memory refresh logic...

Страница 122: ...enable flip flops IFFl and IFF2 Note that this instruction disables the maskable interrupt during its execution the maskable interrupt is disabled until it is subsequently re enabled by an EI instruc...

Страница 123: ...pt by setting the interrupt enable flip flops IFFl and IFF2 Note that this instruction disables the maskable interrupt during its execution the maskable interrupt is enabled The CPU will now respond t...

Страница 124: ...1M o I 0 a I ED 10 1 0 0 0 1 1 0 I 46 The 1M 0 instruction sets interrupt mode O In this mode the interrupting device can insert any instruction on the data bus and allow the CPU to execute it...

Страница 125: ...1M 11 0 a I ED I0 0 0 a I 56 The 1M instruction sets interrupt mode 1 In this mode the processor will respond to an interrupt by executing a restart to location 0038H...

Страница 126: ...rrupt mode 2 This mode allows an indirect call to any location in memory With this mode the CPU forms a 16 bit memory address The upper eight bits are the contents of the Interrupt Vector Register I a...

Страница 127: ......

Страница 128: ......

Страница 129: ...nts of regi pair ilL and the result is stored in ilL Operand i specified as follows in the assembled object code Register Pair ss BC 00 DE 01 ilL 10 SP 11 Not affected Not affected Set if carry out of...

Страница 130: ...If register pair HL contains the integer 42428 and register pair DE contains IlllH after the execution of...

Страница 131: ...in the F register to the contents of register pair HL and the result is stored in HL Operand ss is specified as follows in the assembled object code Register Pair ss BC 00 DE 01 HL 10 SP 11 Set if res...

Страница 132: ...If the register pair BC contains 2222H register pair HL contains 5437H and the Carry Flas is set after the execution of...

Страница 133: ...he F register are subtracted from the contents of register pair ilL and the result is stored in ilL Operand ss is specified as follows in the assembled object code Register Pair ss BC 00 DE 00 ilL 10...

Страница 134: ...If the contents of the HL register pair are 9999H the contents of registeT pair DE are 11118 and the Carry Flag is set after the execution of...

Страница 135: ...dded to the contents of the Index Register IX and the results are stored in IX Operand pp is specified as follows in the assembled object code Register Pair BC 00 DE 01 IX 10 SP 11 Not affected Not af...

Страница 136: ...If the contents of Index Register IX are 333H and the contents of register pair Be are 5555H after the execution of...

Страница 137: ...ed to the contents of Index Register IY and the result is stored in IY Operand rr is specified as follows in the assembled object code Register Pair rr BC 00 DE 01 IY 10 SP 11 Not affected Not affecte...

Страница 138: ...If the contents of Index Register IY are 333H and the contents of register pair Be are SSSH after the execution of...

Страница 139: ...DE HL or SP are increnented Operand ss is specified as follows in the assembled object code i egister Pair ss BC 00 DE 01 ilL 10 SP 11 M CYCLES 1 T STATES 6 4 MHZ E T 1 SO Condi tion Bits Affected No...

Страница 140: ...INC x 11 0 a I DO I0 a a a a I 23 If the Index Register IX contains the integer 3300H after the execution of...

Страница 141: ...INC IY I 1 0 1 I FD I 0 a a a a I 23 If the contents of the Index Register are 2977H after the execution of...

Страница 142: ...airs BC DE HL or SP are decremented Operand ss is specified as follows in the assembled object code Pair ss BC 00 DE 01 HL 10 SP 11 11 CYCLES 1 T STATES 6 4 HIlZ E T 1 50 Condition Bits Affected None...

Страница 143: ...DEe IX 1 1 0 1 1 1 0 1 I DO I0 0 1 0 1 0 1 I 2B If the contents of Index Register IX are 2006ll after the execution of...

Страница 144: ...DEe IY I 1 0 I FD I 0 a a a I 28 If the contents of the Index Register IY are 7649H after the execution of...

Страница 145: ......

Страница 146: ......

Страница 147: ...previous content of bit 1 is moved to bit 2 this pattern is continued throughout the register The content of bit 7 is copied into the Carry Flag C flag in register F and also into bit O Bit 0 is the l...

Страница 148: ...Example If the contents of the Accumulator are...

Страница 149: ...s pattern is continued throughout the register The content of bit 7 is copied into the Carry Flag C flag in register F and the previous content of the Carry Flag is copied into bit O Bit 0 is the leas...

Страница 150: ...If the contents of the Accumulator and the Carry Flag are the contents of the Accumulator and the Carry Flag will be...

Страница 151: ...evious content of bit 6 is copied into bit 5 this pattern is continued throughout the register The content of bit 0 is copied into bit 7 and also into the Carry Flag C flag in register F Bit 0 is the...

Страница 152: ...the contents of the Accumulator and the Carry Flag will be...

Страница 153: ...t 6 is copied into bit 5 this pattern is continued throughout the register The content of bit 0 is copied into the Carry Flag C flag in register F and the previous content of the Carry Flag is copied...

Страница 154: ...If the contents of the Accumulator and the Carry Flag are the contents of the Accumulator and the Carry Flag will be...

Страница 155: ...into bit 1 the previous content of bit 1 is copied into bit 2 this pattern is continued throughout the register Ihe content of bit 7 is copied into the Carry Flag C flag in register F and also into b...

Страница 156: ...Set if result is negative reset othervlise Set if result is zero reset otherwise Re se t Set if parity even reset otherwise Re se t Data from Bit 7 of source register ll P V...

Страница 157: ...e previous content of bit 1 is copied into bit 2 this pattern is continued throughout the byte The content of bit 7 is copied into the Carry Flag C flag in register F and also into bit O Bit 0 is the...

Страница 158: ...If the contents of the ilL register pair are 2828H and the contents of memory location 2828H are the contents of memory location 2828il and the Carry Flag will be...

Страница 159: ...teger d are rotated left the contents of bit 0 is copied into bit 1 the previous content of bit 1 is copied into bit 2 this pattern is continued throughout the byte The content of bit 7 is copied into...

Страница 160: ...If the contents of the Index Register IX are 1000H and the contents of memory location 1022 are the contents of menory location 1002H and the Carry Flag v ill be...

Страница 161: ...nteger d are rotated left the content of bit 0 is copied into bit 1 the previous content of bit 1 is copied into bit 2 this process is continued throughout the byte The content of bit 7 is copied into...

Страница 162: ...If the contents of the Index Register IY are lOOOH and the contents of memory location l002H are the contents of memory location l002H and the Carry Flag illbe...

Страница 163: ...d as defined for the analogous RLe instructions These various possible opcode operand combinations are specified as follows in the assembled object code 1 1 0 0 1 0 I CB 0 a 0 a 7 r 1 a a 1 a CB a a a...

Страница 164: ...f bit 0 is copied into bit 1 the previous content of bit 1 is copied into bit 2 this pattern is continued throughout the byte The content of bit 7 is copied into the Carry Flag C flag in register F an...

Страница 165: ...Set if result is negative reset otherwise Set if result is zero reset otherwise Rese t Set if parity even reset otherwise Re se t Data from Bit 7 of source register Ii P V...

Страница 166: ...or IY d as defined for the analogous RLC instructions These various possible opcode operand combinations are specified as follows in the assembled object code 1 0 0 0 I CB 0 0 0 0 1 r 1 0 0 0 CB o 0...

Страница 167: ...ight the content of bit 7 is copied into bit 6 the previous content of bit 6 is copied into bit 5 this pattern is continued throughout the byte The content of bit 0 is copied into the Carry Flag C fla...

Страница 168: ...Set if result is negative reset otherwise Set if result is zero reset otherwise Re se t Set if parity even reset otherwise Re se t Data from Bit 0 of source register H P V...

Страница 169: ...is any of r HL IX d or IY d as defined for the analogous RLC instructions These various possible opcode operand combinations are specified as follows in the assembled object code 1 1 0 0 1 0 1 1 CB o...

Страница 170: ...s copied into bit 6 the previous content of bit 6 is copied into bit 5 this pattern is continued throughout the byte The content of bit a is copied into the Carry Flag C flag in register F and the pre...

Страница 171: ...rwise Re se t Set if parity is even reset otherwise Re se t Data from Bit 0 of source register H P V If the contents of the HL register pair are 4343H and the contents of nemory location 4343H and the...

Страница 172: ...r IY d as defined for the analogous RLC instructions These various possible opcode operand conbinations are specified as follows in the assembled object code 1 1 0 0 1 0 1 1 0 r 1 1 0 0 1 0 1 1 o 0 1...

Страница 173: ...contents of operand m bit 0 is reset the previous content of bit 0 is copied into bit 1 the previous content of bit 1 is copied into bit 2 this pattern is continued throughout the content of bit 7 is...

Страница 174: ...Affected S Se t if result is negative reset otherwise z Se t if result is zero reset otherwise H Re se t p V Se t if parity is even reset otherwise N Reset C Data from Bit 7 Example If the contents of...

Страница 175: ...d as defined for the analogous RLC instructions These various possible opcode operand combinations are specified as follows in the assembled object code 1 a a a I CB a a a l r 1 1 1 0 0 1 0 1 1 CB 0...

Страница 176: ...tents of operand m the content of bit 7 is copied into bit 6 he previous content of bit 6 is copied into bit 5 this pattern is continued throughout the byte The content of bit 0 is copied into the Car...

Страница 177: ...t otherwise Re se t Set if parity is even reset otherwise Re se t Data fro Bit 0 of source register H p v If the contents of the Index Register IX are lOOOH and the contents of me ory location l003H a...

Страница 178: ...fined for the analogous RLC instructions These various possible opcode operand combinations are specified as ollows in the assembled object code 11 0 0 0 I CB 10 0 1 1 1 r 1 I 0 0 0 1 I CB I 0 0 1 1 1...

Страница 179: ...and m are shifted right the content of bit 7 is copied into bit 6 the content of bit 6 is copied into bit 5 this pattern is continued throughout the byte The content of bit 0 is copied into the Carry...

Страница 180: ...Set if result is negative reset otherwise Set if result is zero reset otherwise Re se t Set if parity is even reset otherwise Re se t Data from Bit 0 of source register H P V...

Страница 181: ...r register A and the previous contents of the low order four bits of the Accumulator are copied into he low order four bits of memory location IlL The contents of the high order bits of the Accumulato...

Страница 182: ...If the contents of the HL register pair are SOOOH and the contents of the Accumu ator and memory location SOOOH are the contents of the Accumulator and memory location SOOOH will be...

Страница 183: ...5 and 4 of location ilL and the previous contents of the high order four bits of ilL are copied into the low order four bits of ilL The contents of the high order bits of the Accumulator are unaffecte...

Страница 184: ...If the contents of the HL register pair are SOOOH and the contents of the Accu ulator and memory location SOOOH are the contents of the Accumulator and menory location 5000H will be...

Страница 185: ......

Страница 186: ......

Страница 187: ...of the indicated bit within the indicated register Operands b and r are specified as follows in the assenbled object code Bit Tested b R g_ e r a 000 B 000 1 001 C 001 2 010 D 010 3 all E all 4 100 II...

Страница 188: ...If bit 2 in register B contains 0 after the execution of the Z flag in the F register will contain 1 and bit 2 in register B will remain O Bit 0 in register B is the least significant bit...

Страница 189: ...dicated bit within the contents of the ilL register pair Operand b is specified as follows in the assembled object code Bit Tested b 0 000 1 001 2 010 3 011 4 100 5 101 6 110 7 111 M CYCLES 3 T STATES...

Страница 190: ...444H and bit 4 in the memory location 444H contains 1 after the execution of the Z flag in the F register will contain 0 and bit 4 in memory location 44448 will still contain 1 Bit in memory location...

Страница 191: ...ll contain the complement of the indicated bit within the contents of the memory locati pointed to by the sum of the contents register pair I Index Register IX and the two s complement displacement in...

Страница 192: ...P V N C If the contents of Index Register IX are 2000H and bit 6 in memory location 2004H contains 1 after the execution of the Z flag in the F register will contain 0 and bit 6 in memory location 20...

Страница 193: ...nt of the indicated bit within the contents of the memory location pointed to by the sum of the contents of register pair IY Index Register IY and the two s complement displacement integer d Operand b...

Страница 194: ...H P V N C If the contents of Index Register are 2000H and bit 6 in memory location 2004H contains 1 after the execution of the Z flag in the F register sill contain 0 and bit 6 in memory location 200...

Страница 195: ...B C D E H L or A is set Operands band r are specified as follows in the assembled object code Bit b Register r a 000 B 000 1 001 C 001 2 010 D 010 3 all E all 4 100 H 100 5 101 L 101 6 110 A 111 7 111...

Страница 196: ...r pair HL is set Operand b is specified as follows in the assembled object code Bit Tested b 0 000 1 001 2 010 3 011 4 100 5 101 6 110 7 111 If the contents of the HL register pair are 3000H after the...

Страница 197: ...gh 0 in the memory location addressed by the sum of the contents of the IX register pair Index Register IX and the two s complement integer d is set Operand b is specified as follows in the assembled...

Страница 198: ...If the contents of Index Register are 2000H after the execution of bit 0 in memory location 2003H will be 1 Bit 0 in memory location 2003H is the least significant bit...

Страница 199: ...on addressed by the sum of the contents of the IY register pair Index Register IY and the two s complement displacement d is set Operand b is specified as follows in the assembled object code Bit Test...

Страница 200: ...If the contents of Index Register IY are 2000H after the execution of bit 0 in memory location 2003H will be 1 Bit 0 in memory location 2003H is the least significant bit...

Страница 201: ...of r 1iL IX d or IY d as defined for the analogous SET instructions These various possible opcode operand combinations are assembled as follows in the object code 1 1 1 0 11 0 b7 r 1 1 0 0 11 0 7 b 1...

Страница 202: ...2 010 D 010 3 all E all 4 100 H 100 5 101 L 101 6 110 A 111 7 111 RES r RES HL RES IX d RES IY d 8 4 4 15 4 4 4 3 23 4 4 3 5 4 3 23 4 4 3 5 4 3 2 00 3 75 5 75 5 75 bit 6 in register D will be reset Bi...

Страница 203: ......

Страница 204: ......

Страница 205: ...Note The first operand in this assembled object code is the low order byte of a 2 byte address Operand nn is loaded into register pair PC Program Counter and points to the address of the next program...

Страница 206: ...rogram Counter is incremented as usual and the program continues with the next sequential instruction Condition cc is programmed as one of eight status which corresponds to condition bits in the Flag...

Страница 207: ...C flag in the F register is set and the contents of address 1520 are 03H after the execution of the Program Counter will contain 1520ll and on the next machine cycle the CPU will fetch from address 1...

Страница 208: ...ontents of the PC This jump is measured from the address of the instruction opcode and has a range of 126 to 129 bytes The assembler calculate s the displacement e and automatically adjusts for the tw...

Страница 209: ...ext instruction is fetched from the location designated by the new contents of the PC The jump is measured from the address of the instruction opcode and has a range of 126 to 129 bytes The assembler...

Страница 210: ...The resulting object code and final PC value is shown below 47C LABEL 47D 47E 47F 480 JR C L ABEL 481 38 FA 2 5 complement 6...

Страница 211: ...xt instruction is fetched from the location designated by the new contents of the PC The jump is measured from the address of the instruction opcode and has a range of 126 to 129 bytes The assembler c...

Страница 212: ...The resulting object code and PC after the jump are shown below 480 LABEL JR NC LABEL 30 PC after jump 481 00...

Страница 213: ...is fetched from the location designated by the new contents of the PC The jump is measured from the address of the instruction opcode and has a range of 126 to 129 bytes The assembler calculates the d...

Страница 214: ...The resulting object code and final PC value is shown below 300 JR Z LPBEL 301 302 303 304 305 LABEL...

Страница 215: ...xt instruction is fetched from the location designated by the new contents of the PC The jump is measured from the address of the instruction opcode and has a range of 126 to 129 bytes The assembler c...

Страница 216: ...The resulting object code and final PC value is shown below 47C LABEL 47D 47E 47F 480 JR NZ LABEL 481...

Страница 217: ...h the contents of the HL register pair The next instruction is fetched from the location designated by the new contents of the PC If the contents of the Program Counter are 1000ll and the contents of...

Страница 218: ...aded with the contents of the IX Register Pair Index Register IX The next instruction is fetched from the location designated by the new contents of the PC If the contents of the Program Counter are l...

Страница 219: ...with the contents of the IY register pair Index Register IY The next instruction is fetched from the location designated by the new contents of the PC If the contents of the Program Counter are lOOOH...

Страница 220: ...e address of the instruction opcode and has a range of 126 to 129 bytes The assembler calculates the displacement e and automatically adjusts for the twice incremented PC If the result of decrementing...

Страница 221: ...ver occurs first LD B 80 Se t up counter LD HL Inbuf Set up pointers LD DE Outbuf OP LD A HL Get next byte from input buffer LD DE A Store in output buffer CP DOH Is it a CR JR Z DONE Yes finished INC...

Страница 222: ......

Страница 223: ...o be fetched At the end of the subroutine a RETurn instruction can be used to return to the origina program flow by popping the top of the stack back into PC The push is accomplished by first decremen...

Страница 224: ...byte instruction CD352lH will be fetched to the CPU for execution The mnemonic equivalent of this is After the execution of this instruction the contents of memory address 300lH will be IAH the conte...

Страница 225: ...he end of the subroutine a RETurn instruction can be used to return to the original program flow by popping the top of the stack back into PC If condition cc is false the Program Counter is incremente...

Страница 226: ...111 HZ non zero Z zero HC non carry C carry PO parity odd PE parity even P sign positive H sign negative Relevan t Flag Z Z C C p v p v S S If the C Flag in the F register is reset the contents of th...

Страница 227: ...emory address 300lH will be lAH the contents of address 3000H will be 4AH the contents of the Stack Pointer will be 3000H and the contents of the Program Counter will be 2l35H pointing to the address...

Страница 228: ...the contents of the memory address now pointed to by the SP The SP is now incremented a second time On the following machine cycle the CPU will fetch the next program opcode from the location in memo...

Страница 229: ...P is now incremented a second time On the following machine cycle the CPU will fetch the next program opcode from the location in memory now pointed to by the PC If condition cc is false the PC is sim...

Страница 230: ...Pointer are ZOOOH the contents of mecory location ZOOOH are B5H and the contents of memory location ZOOIH are IBH then after the execution of the contents of the Stack Pointer will be ZOOZH and the c...

Страница 231: ...an I O device that the interrupt routine has been conpleted The REII instruction facilitates the nesting of interrupts allowing higher priority devices to suspend service of lower priority service ro...

Страница 232: ...A generates an i terrupt suspending service of B The lEO of A goes low indicating that a higher priority device is being serviced The A routine is completed and a RETl is issu d resetting the lEO of...

Страница 233: ...mory location now pointed to by SP and SP is incremented again Control is now returned to the original program flow on the following machine cycle the CPU will fetch the next opcode from the location...

Страница 234: ...rvice routine uhich ends with RETN instruction Upon the execution of RETN the former Program Counter contents are popped off the external memory stack low order first resulting in a Stack Pointer cont...

Страница 235: ...memory address now pointed to by SP decrementing SP again and loading the low order byte of PC into the address now pointed to by SP The ReSTart instruction allows for a jump to one of eight addresse...

Страница 236: ...If the contents of the Program Counter are l5B3R after the execution of the PC will contain DDl8R as the address of the next opcode to be fetched...

Страница 237: ......

Страница 238: ......

Страница 239: ...of the Accumulator also appear on the top half A8 through A15 of the address bus at this time Then one byte from the selected port is placed on the data bus and written into the Accumulator register...

Страница 240: ...alf A8 through A15 of the address bus at this time Then one byte from the selected port is placed on the data bus and vritten into register r in the CPU Register r identifies any of the CPU registers...

Страница 241: ...reset otherwise Reset Set if parity is even reset otherwise Re se t Not affected R P V If the contents of register Care 07R the contents of register B are lOR and the byte 7BR is available at the peri...

Страница 242: ...aced on the data bus and written to the CPU The contents of the HL register pair are then placed on the address bus and the input byte is written into the corresponding location of memory Finally the...

Страница 243: ...memory location lOOOH will contain 7BH the HL register pair will contain lOOlH and register B will contain OFH...

Страница 244: ...and written to the CPU The contents of the HL register pair are placed on the address bus and the input byte is written into the corresponding location of cemory Then register pair HL is incremented t...

Страница 245: ...re 03H the contents of the HL register pair are lOOOH and the following sequence of bytes are available at the peripheral device mapped to I O port of address 07H SlH A9H 03H the HL register pair will...

Страница 246: ...e from the selected port is placed on the data bus and written to the CPU The contents of the HL register pair are placed on the address bus and the input byte is written into the corresponding locati...

Страница 247: ...peripheral device mapped to I O port address 07H then after the execution of memory location lOOOH will contain 7BH the ilL register pair will contain OFFFH and register B will contain OFH...

Страница 248: ...a bus and written to the CPU The contents of the ilL register pair are placed on the address bus and the input byte is written into the corresponding location of memory Then ilL and the byte counter a...

Страница 249: ...Bare 03H the contents of the HL register pair are 1000H and the following sequence of bytes are available at the peripheral device apped to I O port address 07H SIll A9H 03H the HL register pair will...

Страница 250: ...AccuQulator register A also appear on the top half AB through A15 of the address bus at this tiJ le Then the byte contained in the Accumulator is placed on the data bus and written into the selected p...

Страница 251: ...e placed on the top half A8 through A15 of the address bus at this time Then the byte contained in register r is placed on the data bus and written into the selected peripheral device Register r ident...

Страница 252: ...If the contents of register Care 01ll and the contents of register Dare SAH after the execution of the byte SAH will have been written to the peripheral device mapped to I O ort address 01H...

Страница 253: ...he I O device at one of 256 possible ports Register B may be used as a byte counter and its decremented value is placed on the top half A8 through A15 of the address bus The byte to be output is place...

Страница 254: ...register B will contain OFH the HL register pair will contain 1001H and the byte 59H will have been written to the peripheral device mapped to I O port address 07H...

Страница 255: ...e counter and its decremented value is placed on the top half A8 through A15 of the address bus at this time Next the byte to be output is placed on the data bus and written into the selected peripher...

Страница 256: ...he contents of the HL register pair are 1000H and memory locations have the following contents l OOOH 100lH 1002H 5lH A9H 03H the HL register pair will contain 1003H register B will contain zero and a...

Страница 257: ...C are placed on the bottom half AD through A7 of the address bus to select the I O device at one of 256 possible ports Register B may be used as a byte counter and its decremented value is placed on t...

Страница 258: ...air are 1000H and the contents of memory location 1000H are 59H after the execution of register B will contain OFH the HL register pair will contain OFFFH and the byte 59H will have been written to th...

Страница 259: ...ter and its decremented value is placed on the top half A8 through A15 of the address bus at this time Next the byte to be output is placed on the data bus and written into the selected peripheral dev...

Страница 260: ...the contents of the RL register pair are lOOOH and memory locations have the following contents OFFER OFFFH lOOOH 5lR A9H 03H the HL register pair will contain OFFDR register B will contain zero and...

Страница 261: ......

Страница 262: ......

Страница 263: ...thmetic The carry bit is set or reset depending on the operation being performed For ADD instructions that generate a carry and SUBTRACT instructions that generate a borrow the Carry Flag will be set...

Страница 264: ...in the Accumulator is greater than the maximum possible number 127 or is less than the minimum possible number 128 This overflow condition can be determined by examining the sign bits of the operands...

Страница 265: ...LDDR 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 reset to 0 otherwise the flag is a Logic 1 During LD A I and...

Страница 266: ...and OUTD if the result of B 1 is zero the Z flag is set otherwise it is reset Also for byte inputs from I O devices using IN r C the Z Flag is set to indicate a zero byte input The 5ign Flag 5 stores...

Страница 267: ......

Страница 268: ...t BIT b of Reg r Call subroutine at location nn if condition cc 1s true Unconditional call subroutine at location nn Complement carry flag Compare operand 8 with Ace Cocpare location lIL and Ace decre...

Страница 269: ...Increment location IY d 107 Increment Reg r 102 In c rem e n t Re g p air s s 138 Load location HL with input from port C decrement HL and B 5 Load location HL with input from port C decrement HL and...

Страница 270: ...h value n 19 2 1 10 LD IX d r Load location IX d with Reg r 14 2 1 7 LD IY nn Load IY with value nn 34 2 2 3 LD IY nn Load IY with location nn 39 2 2 7 LD I Y d n Load location IY d with value n 20 2...

Страница 271: ...B 252 Load IX with top of staCk Load IY with top of stack 54 Load Reg pair qq with top of stack 51 Load IX onto stack 49 Load IY onto stack 50 Load Reg pair qq onto stack 48 Reset Bit b of operand m 2...

Страница 272: ...hift operand m right logical 177 Subtract operand s from Ace 90 Exclusive OR operand 8 and Ace 98 2 7 16 2 10 7 2 6 3 2 5 5 2 8 6 2 8 7 2 8 8 2 8 5 2 7 12 2 7 13 2 7 14 2 4 7 2 4 11 Information furnis...

Страница 273: ...Hannover 1 Lange Laube 19 Tel 0511 17522 3 Telex 0923195 8000 Miinchen 40 Gernotstrasse 10 Tel 089 304270 304485 Telex 05215784 8500 Nurnberg 15 Parsifalstrasse 10 Tel 0911 40645 7000 Stuttgart 80 Kal...

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