52
Rabbit 2000/3000 Microprocessor
Description
Loads the register pair dd (any of the register pairs BC, DE, HL, or SP) with the 16-bit value mn.
Description
•
LD EIR,A:
Loads the External Interrupt Register, EIR, with the data in the Accumulator. The
EIR is used to specify the Most Significant Byte (MSB) of the External Interrupt address. The
value loaded in the EIR is concatenated with the appropriate External Interrupt address to form
the 16-bit ISR starting address.
•
LD IIR,A:
Loads the Internal Interrupt Register, IIR, with the data in the Accumulator. The
IIR is used to specify the Most Significant Byte (MSB) of the Internal Peripheral Interrupt
address. The value loaded in the IIR is concatenated with the appropriate Internal Peripheral
address to form the 16-bit ISR starting address for that peripheral.
LD dd,mn
Opcode
Instruction
Clocks
Operation
——
01 n m
11 n m
21 n m
31 n m
LD dd,mn
LD BC,mn
LD DE,mn
LD HL,mn
LD SP,mn
6 (2,2,2)
6 (2,2,2)
6 (2,2,2)
6 (2,2,2)
6 (2,2,2)
dd = mn
BC = mn
DE = mn
HL = mn
SP = mn
Flags
ALTD
I/O
S
Z
L/V
C
F
R
SP
S
D
-
-
-
-
•
LD EIR,A
LD IIR,A
Opcode
Instruction
Clocks
Operation
ED 47
LD EIR,A
4 (2,2)
EIR = A
ED 4F
LD IIR,A
4 (2,2)
IIR = A
Flags
ALTD
I/O
S
Z
L/V
C
F
R
SP
S
D
-
-
-
-
Содержание 2000
Страница 2: ...ii Rabbit 2000 3000 Microprocessor...
Страница 4: ...iv Rabbit 2000 Microprocessor...
Страница 16: ...12 Rabbit 2000 3000 Microprocessor...
Страница 112: ...108 Rabbit 2000 3000 Microprocessor...
Страница 120: ...ii Rabbit 2000 3000 Microprocessor...