Absolute Addressing Mode !Abs - Hyundai GMS800 Instruction Manual

1.4. Absolute Addressing Mode
The address field of the instruction gives the address of the operand in memory. 2nd byte instruction is the
lower address and 3rd byte is the upper address. The disadvantage of absolute addressing mode is to
require 3-byte instruction.
OP CODE
Operand
A
X
Y
PSW
Memory
Example)
07 35 D0
Example)
98 35 01


!abs
Low Address Upper Address
ADC AND CMP
CMPX LDX STX
CMPY LDY STY
JMP CALL
ASL BIT DEC
ADC !0D035H
( G=1 )
INC !0135H
Instructions
LDA EOR OR
INC LSR ROL
A ← A+data+C
data ← data + 1
Addressing Mode
SBC STA
ROR TCLR1 TSET1
MEMORY
data
D035
h
Op code ( 07 )
Operand( 35 )
Operand( D0 )
MEMORY
000
h
0 Page 0 Page
0FF
h
100
h
1 Page
data
135
h
1FF
h
Op code ( 98 )
Operand ( 35 )
Operand ( 01 )
5