M8C REGISTER SET
The following is a list of the M8C registers used by ASM8C:
A - Accumulator
X - Index
SP - Stack Pointer
F - Flags
M8C ADDRESSING MODES
The M8C instructions may have none, one, or two operands
selected from the registers listed above or an addressing mode
from the following list:
expr - immediate argument
- In the lcall, ljmp, index,
and pc relative branching
instructions expr is an
address expression.
#expr - immediate argument
[expr] - argument at location expr
[x+expr] - argument at location x + expr
reg[expr] - argument at location expr
in register space
reg[x+expr] - argument at location x + expr
in register space
[[expr]++] - The value in memory at address
expr (the indirect address)
points to a memory location in
RAM. The value in memory at
address expr is then incremented.
This addressing mode is used only
by the mvi instruction and
allows the short form [expr]
for this addressing mode.
The following tables list all M8C mnemonics and addressing
modes recognized by the ASM8C assembler.
Double Operand Arithmetic Instructions
adc a,expr
adc a,[expr] adc [expr],a
adc a,[x+expr] adc [x+expr],a
adc [expr],expr adc [x+expr],expr
add a,expr
add a,[expr] add [expr],a
add a,[x+expr] add [x+expr],a
add [expr],expr add [x+expr],expr
add sp,expr
cmp a,expr
cmp a,[expr]
cmp a,[x+expr]
cmp [expr],expr cmp [x+expr],expr
sbb a,expr
sbb a,[expr] sbb [expr],a
sbb a,[x+expr] sbb [x+expr],a
sbb [expr],expr sbb [x+expr],expr
sub a,expr
sub a,[expr] sub [expr],a
sub a,[x+expr] sub [x+expr],a
sub [expr],expr sub [x+expr],expr
Double Operand Logic Instructions
and a,expr and f,expr
and a,[expr] and [expr],a
and a,[x+expr] and [x+expr],a
and [expr],expr and [x+expr],expr
and reg[expr],expr and reg[x+expr],expr
or a,expr or f,expr
or a,[expr] or [expr],a
or a,[x+expr] or [x+expr],a
or [expr],expr or [x+expr],expr
or reg[expr],expr or reg[x+expr],expr
xor a,expr xor f,expr
xor a,[expr] xor [expr],a
xor a,[x+expr] xor [x+expr],a
xor [expr],expr xor [x+expr],expr
xor reg[expr],expr xor reg[x+expr],expr
Miscellaneous Double Operand Instructions
swap a,x swap a,sp
swap a,[expr] swap a,[x+expr]
tst [expr] tst [x+expr]
tst reg[expr] tst reg[x+expr]
Single Operand Shift/Rotate Instructions
asl a
asl [expr] asl [x+expr]
asr a
asr [expr] asr [x+expr]
rlc a
rlc [expr] rlc [x+expr]
rrc a
rrc [expr] rrc [x+expr]
Miscellaneous Single Operand Instructions
cpl a
dec a dec x
dec [expr] dec [x+expr]
inc a inc x
inc [expr] inc [x+expr]
pop a pop x
push a push x
tst [expr] tst [x+expr]
tst reg[expr] tst reg[x+expr]
AZ.3.6 Move Instructions
mov a,x
mov a,expr
mov a,[expr] mov [expr],a
mov a[x+expr] mov [x+expr],a
mov x,a mov x,sp
mov x,expr
mov x,[expr] mov [expr],x
mov x,[x+expr]
mov [expr],expr mov [x+expr],expr
mov [expr],[expr]
mov a,reg[expr] mov a,reg[x+expr]
mov reg[expr],a mov reg[x+expr],a
mov reg[expr],expr mov reg[x+expr],expr
mvi a,[expr] == mvi a,[[expr]++]
mvi [expr],a == mvi [[expr]++],a
Inherent Instructions
halt nop
romx ssc
ret reti
Branching Instructions
lcall expr ljmp expr
jz expr jnz expr
jc expr jnc expr
jacc expr
Relative Table Read Instruction
index expr
... Exit the ASxxxx Documentation
... Home Page