You cannot select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

25 lines
355 B
ArmAsm

;
; Ullrich von Bassewitz, 23.11.2002
;
; CC65 runtime: Convert char in ax into a long
;
.export aulong, along
.importzp sreg
; Convert A from char to long in EAX
aulong: ldx #0
stx sreg
stx sreg+1
rts
along: cmp #$80 ; Positive?
bcc aulong ; Yes, handle like unsigned type
ldx #$ff
stx sreg
stx sreg+1
rts