1989_MELPS_7700_Software_Manual

Immediate
Mode
Function
Immediate addressing mode
A portion of the instruction is the actual data. Such instruction code may cross over
the bank boundary.
Instruction:
ADC,
LDX,
AND,
LDY,
CLP,
MPY,
CMP,
ORA,
CPX,
RLA,
CPY,
SSC,
DIV,
SEP
EaR,
LDA,
LDT,
ex.
: Mnemonic
AOC A,#OA5H
(m=1)
Machine Code
69 16 A5 16
ex.
: Mnemonic
AOC A, # OA587H
(m=O)
Machine Code
6916 87 16 A5 16
Memory
,......
1------- ~ DODO,.
Memory
"....-
r------- ~ DODO,.
8-bit width
A-A+C+ Op Code (69,.) Program
Operand (AS,.) Bank Register
lAS,. I -
'-------
Program
bank-PG Op Code (69,.)
l6-bit width { Operand (87,.) Program
A-A+C+IAS,.! 87,.I~ Operand (AS,.) Bank Register
r- --
~ FFFF,.
1-------
~ FFFF,.
~
-
-- -
Program
bank-PG
ex. : Mnemonic Machine Code ex. : Mnemonic Machine Code
LOX #OA5H A2 16 A5 16 LOX #OA587H A2 16 87 16 A5 16
(x =1 ) (x=O)
Memory
'------ ~ DODO,.
Memory
j------- ~ DODO,.
Program
bank-PG
Program
l6-bit wIdth Op Code (A2,.) bank-PG
8-bit width Op Code (A2,.) Program
Operand (B7,.) Program
Operand (AS,.) Bank Register
X -lAS,.! B7,.I- {
Operand (AS,.) Bank Register
------- ~ FFFF,.
~ FFFF,.
1--------
-
x+--I AS,. I ~
10