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Fixed the 65816/65802 detection.

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This commit is contained in:
Marco van den Heuvel 2018-02-27 11:44:34 -08:00
parent e79e779aba
commit 5d029af79e
1 changed files with 13 additions and 12 deletions
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25
libsrc/common/getcpu.s
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@ -35,7 +35,7 @@ _getcpu:
cmp #1
beq @L6
; check for 4510
; This is at least a 65ce02, check for 4510
lda #5 ; CPU_65CE02 constant
.byte $5c ; map on 4510, aug on 65ce02 (acts like 4 byte nop)
@ -43,25 +43,26 @@ _getcpu:
nop
bne @L9
; Check for 65816/65802
@L6: xba ; .byte $eb, put $01 in B accu (nop on 65c02/65sc02)
dec a ; .byte $3a, A=$00
xba ; .byte $eb, A=$01 if 65816/65802 and A=$00 if 65c02/65sc02
inc a ; .byte $1a, A=$02 if 65816/65802 and A=$01 if 65c02/65sc02
cmp #2
beq @L9
; check for 65sc02
@L6: ldy $f7
ldx #$00
ldy $f7
ldx #0
stx $f7
.byte $f7,$f7 ; nop nop on 65sc02, smb7 $f7 on 65c02 and 65816
.byte $f7,$f7 ; nop nop on 65sc02, smb7 $f7 on 65c02
ldx $f7
sty $f7
cpx #$00
bne @L7
lda #4 ; CPU_65SC02 constant
bne @L9
lda #4 ; CPU_65SC02 constant
; check for 65816; after 4510, because $eb there is row (rotate word)
@L7: xba ; .byte $eb, put $01 in B accu
dec a ; .byte $3a, A=$00 if 65C02
xba ; .byte $eb, get $01 back if 65816
inc a ; .byte $1a, make $01/$02
@L9: ldx #0 ; Load high byte of word
rts