6800 REGISTER SET
The following is a list of the 6800 registers used by AS6800:
a,b - 8-bit accumulators
x - index register
6800 INSTRUCTION SET
The following tables list all 6800/6802/6808 mnemonics recog-
nized by the AS6800 assembler. The designation [] refers to a
required addressing mode argument. The following list specifies
the format for each addressing mode supported by AS6800:
#data immediate data
byte or word data
*dir direct page addressing
(see .setdp directive)
0 <= dir <= 255
,x register indirect addressing
zero offset
offset,x register indirect addressing
0 <= offset <= 255
ext extended addressing
label branch label
The terms data, dir, offset, ext, and label may all be expres-
sions.
Note that not all addressing modes are valid with every in-
struction, refer to the 6800 technical data for valid modes.
Inherent Instructions
aba cba
clc cli
clv daa
des dex
ins inx
nop rti
rts sba
sec sei
sev swi
tab tap
tba tpa
tsx txs
wai
psha pshb
psh a psh b
pula pulb
pul a pul b
Branch Instructions
bra label bhi label
bls label bcc label
bhs label bcs label
blo label bne label
beq label bvc label
bvs label bpl label
bmi label bge label
blt label bgt label
ble label bsr label
Single Operand Instructions
asla aslb
asl a asl b
asl []
asra asrb
asr a asr b
asr []
clra clrb
clr a clr b
clr []
coma comb
com a com b
com []
deca decb
dec a dec b
dec []
inca incb
inc a inc b
inc []
lsla lslb
lsl a lsl b
lsl []
lsra lsrb
lsr a lsr b
lsr []
nega negb
neg a neg b
neg []
rola rolb
rol a rol b
rol []
rora rorb
ror a ror b
ror []
tsta tstb
tst a tst b
tst []
Double Operand Instructions
adca [] adcb []
adc a [] adc b []
adda [] addb []
add a [] add b []
anda [] andb []
and a [] and b []
bita [] bitb []
bit a [] bit b []
cmpa [] cmpb []
cmp a [] cmp b []
eora [] eorb []
eor a [] eor b []
ldaa [] ldab []
lda a [] lda b []
oraa [] orab []
ora a [] ora b []
sbca [] sbcb []
sbc a [] sbc b []
staa [] stab []
sta a [] sta b []
suba [] subb []
sub a [] sub b []
Jump and Jump to Subroutine Instructions
jmp [] jsr []
Long Register Instructions
cpx []
lds [] sts []
ldx [] stx []
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