I don't expect anyone to actually use it, but please take a look at bass v13:
Code:
http://byuu.org/files/bass_v13.tar.xz
If you go to arch/table/snes-smp.arch, it's my take on a 6502-syntax for the SPC700.
In fact, it's small enough to paste the table here. I'll post it below.
I'd be game to working with you guys to reach a consensus on the syntax (meaning changing mine.) I'd really like to avoid having multiple versions of this out there, as that would discourage its adoption.
But it really is a magnificent fix. It's pretty clear that the SPC700 is about 85% directly compatible with the 6502.
The main issues with this are: two-argument instructions (dp,imm), bit-syntax (addr.bit), new instructions (we'd usually want ora, but there's an or carry), more new instructions (mov1, etc.); the comma is particularly troublesome because 6502 uses it in place of + for addressing.
Code:
nop ;$00
brk ;$0f
rts ;$6f
rti ;$7f
xcn ;$9f
wai ;$ef
stp ;$ff
clp ;$20
clc ;$60
cli ;$c0
clv ;$e0
sep ;$40
sec ;$80
sei ;$a0
cmc ;$ed
php ;$0d
pha ;$2d
phx ;$4d
phy ;$6d
plp ;$8e
pla ;$ae
plx ;$ce
ply ;$ee
inx ;$3d
iny ;$fc
dex ;$1d
dey ;$dc
tax ;$5d
tay ;$fd
tsx ;$9d
txa ;$7d
txs ;$bd
tya ;$dd
mul ;$cf
div ;$9e
das ;$be
daa ;$df
jst *04 ;=a %0001
set *08:*03 ;=b %00010 =a
clr *08:*03 ;=b %10010 =a
bbs *08:*03=*08 ;=b %00011 =a +3c
bbc *08:*03=*08 ;=b %10011 =a +3c
jmp (*16,x) ;$1f =a
jmp *16 ;$5f =a
jsr *16 ;$3f =a
jsp *08 ;$4f =a
bne --y=*08 ;$fe +2a
bne --*08=*08 ;$6e =a +3b
bne *08,x=*08 ;$de =a +3b
bne *08=*08 ;$2e =a +3b
bra *08 ;$2f +2a
bpl *08 ;$10 +2a
bmi *08 ;$30 +2a
bvc *08 ;$50 +2a
bvs *08 ;$70 +2a
bcc *08 ;$90 +2a
bcs *08 ;$b0 +2a
bne *08 ;$d0 +2a
beq *08 ;$f0 +2a
tsb *16 ;$0e =a
trb *16 ;$4e =a
inw *08 ;$3a =a
dew *08 ;$1a =a
adw *08 ;$7a =a
sbw *08 ;$9a =a
cpw *08 ;$5a =a
ldw *08 ;$ba =a
stw *08 ;$da =a
orc !*13:*03 ;$2a ~b ~a
orc *13:*03 ;$0a ~b ~a
and !*13:*03 ;$6a ~b ~a
and *13:*03 ;$4a ~b ~a
eor *13:*03 ;$8a ~b ~a
ldc *13:*03 ;$aa ~b ~a
stc *13:*03 ;$ca ~b ~a
not *13:*03 ;$ea ~b ~a
ora (x) ;$06
orr (x)=(y) ;$19
ora (*08,x) ;$07 =a
ora (*08),y ;$17 =a
ora #*08 ;$08 =a
orr *08=#*08 ;$18 =b =a
ora *16,x ;$15 =a
ora *16,y ;$16 =a
ora *08,x ;$14 =a
orr *08=*08 ;$09 =b =a
ora *16 ;$05 =a
ora *08 ;$04 =a
//
ora.w *16,x ;$15 ~a
ora.b *08,x ;$14 ~a
ora.w *16 ;$05 ~a
ora.b *08 ;$04 ~a
and (x) ;$26
and (x)=(y) ;$39
and (*08,x) ;$27 =a
and (*08),y ;$37 =a
and #*08 ;$28 =a
and *08=#*08 ;$38 =b =a
and *16,x ;$35 =a
and *16,y ;$36 =a
and *08,x ;$34 =a
and *08=*08 ;$29 =b =a
and *16 ;$25 =a
and *08 ;$24 =a
//
and.w *16,x ;$35 ~a
and.b *08,x ;$34 ~a
and.w *16 ;$25 ~a
and.b *08 ;$24 ~a
eor (x) ;$46
eor (x)=(y) ;$59
eor (*08,x) ;$47 =a
eor (*08),y ;$57 =a
eor #*08 ;$48 =a
eor *08=#*08 ;$58 =b =a
eor *16,x ;$55 =a
eor *16,y ;$56 =a
eor *08,x ;$54 =a
eor *08=*08 ;$49 =b =a
eor *16 ;$45 =a
eor *08 ;$44 =a
//
eor.w *16,x ;$55 ~a
eor.b *08,x ;$54 ~a
eor.w *16 ;$45 ~a
eor.b *08 ;$44 ~a
cmp (x) ;$66
cmp (x)=(y) ;$79
cmp (*08,x) ;$67 =a
cmp (*08),y ;$77 =a
cmp #*08 ;$68 =a
cmp *08=#*08 ;$78 =b =a
cmp *16,x ;$75 =a
cmp *16,y ;$76 =a
cmp *08,x ;$74 =a
cmp *08=*08 ;$69 =b =a
cmp *16 ;$65 =a
cmp *08 ;$64 =a
//
cmp.w *16,x ;$75 ~a
cmp.b *08,x ;$74 ~a
cmp.w *16 ;$65 ~a
cmp.b *08 ;$64 ~a
adc (x) ;$86
adc (x)=(y) ;$99
adc (*08,x) ;$87 =a
adc (*08),y ;$97 =a
adc #*08 ;$88 =a
adc *08=#*08 ;$98 =b =a
adc *16,x ;$95 =a
adc *16,y ;$96 =a
adc *08,x ;$94 =a
adc *08=*08 ;$89 =b =a
adc *16 ;$85 =a
adc *08 ;$84 =a
//
adc.w *16,x ;$95 ~a
adc.b *08,x ;$94 ~a
adc.w *16 ;$85 ~a
adc.b *08 ;$84 ~a
sbc (x) ;$a6
sbc (x)=(y) ;$b9
sbc (*08,x) ;$a7 =a
sbc (*08),y ;$b7 =a
sbc #*08 ;$a8 =a
sbc *08=#*08 ;$b8 =b =a
sbc *16,x ;$b5 =a
sbc *16,y ;$b6 =a
sbc *08,x ;$b4 =a
sbc *08=*08 ;$a9 =b =a
sbc *16 ;$a5 =a
sbc *08 ;$a4 =a
//
sbc.w *16,x ;$b5 ~a
sbc.b *08,x ;$b4 ~a
sbc.w *16 ;$a5 ~a
sbc.b *08 ;$a4 ~a
sta (x) ;$c6
sta (x++) ;$af
sta (*08,x) ;$c7 =a
sta (*08),y ;$d7 =a
str *08=#*08 ;$8f =b =a
sta *16,x ;$d5 =a
sta *16,y ;$d6 =a
sta *08,x ;$d4 =a
str *08=*08 ;$fa =b =a
sta *16 ;$c5 =a
sta *08 ;$c4 =a
//
sta.w *16,x ;$d5 ~a
sta.b *08,x ;$d4 ~a
sta.w *16 ;$c5 ~a
sta.b *08 ;$c4 ~a
lda (x) ;$e6
lda (x++) ;$bf
lda (*08,x) ;$e7 =a
lda (*08),y ;$f7 =a
lda #*08 ;$e8 =a
lda *16,x ;$f5 =a
lda *16,y ;$f6 =a
lda *08,x ;$f4 =a
lda *16 ;$e5 =a
lda *08 ;$e4 =a
//
lda.w *16,x ;$f5 ~a
lda.b *08,x ;$f4 ~a
lda.w *16 ;$e5 ~a
lda.b *08 ;$e4 ~a
stx *08,y ;$d9 =a
stx *16 ;$c9 =a
stx *08 ;$d8 =a
//
stx.w *16 ;$c9 ~a
stx.b *08 ;$d8 ~a
sty *08,x ;$db =a
sty *16 ;$cc =a
sty *08 ;$cb =a
//
sty.w *16 ;$cc ~a
sty.b *08 ;$cb ~a
ldx #*08 ;$cd =a
ldx *08,y ;$f9 =a
ldx *16 ;$e9 =a
ldx *08 ;$f8 =a
//
ldx.w *16 ;$e9 ~a
ldx.b *08 ;$f8 ~a
ldy #*08 ;$8d =a
ldy *08,x ;$fb =a
ldy *16 ;$ec =a
ldy *08 ;$eb =a
//
ldy.w *16 ;$ec ~a
ldy.b *08 ;$eb ~a
cpx #*08 ;$c8 =a
cpx *16 ;$1e =a
cpx *08 ;$3e =a
//
cpx.w *16 ;$1e ~a
cpx.b *08 ;$3e ~a
cpy #*08 ;$ad =a
cpy *16 ;$5e =a
cpy *08 ;$7e =a
//
cpy.w *16 ;$5e ~a
cpy.b *08 ;$7e ~a
asl ;$1c
asl *08,x ;$1b =a
asl *16 ;$0c =a
asl *08 ;$0b =a
//
asl.w *16 ;$0c ~a
asl.b *08 ;$0b ~a
lsr ;$5c
lsr *08,x ;$5b =a
lsr *16 ;$4c =a
lsr *08 ;$4b =a
//
lsr.w *16 ;$4c ~a
lsr.b *08 ;$4b ~a
rol ;$3c
rol *08,x ;$3b =a
rol *16 ;$2c =a
rol *08 ;$2b =a
//
rol.w *16 ;$2c ~a
rol.b *08 ;$2b ~a
ror ;$7c
ror *08,x ;$7b =a
ror *16 ;$6c =a
ror *08 ;$6b =a
//
ror.w *16 ;$6c ~a
ror.b *08 ;$6b ~a
inc ;$bc
inc *08,x ;$bb =a
inc *16 ;$ac =a
inc *08 ;$ab =a
//
inc.w *16 ;$ac ~a
inc.b *08 ;$ab ~a
dec ;$9c
dec *08,x ;$9b =a
dec *16 ;$8c =a
dec *08 ;$8b =a
//
dec.w *16 ;$8c ~a
dec.b *08 ;$8b ~a