mirror of
https://github.com/cc65/cc65.git
synced 2024-11-18 00:07:21 +00:00
57 lines
755 B
ArmAsm
57 lines
755 B
ArmAsm
;;
|
|
;; Kevin Ruland
|
|
;;
|
|
;; int write (int fd, const void* buf, int count);
|
|
;;
|
|
;; for now will only write to fd = stdout
|
|
;;
|
|
|
|
.export _write
|
|
|
|
.import popax
|
|
|
|
.importzp ptr1, ptr2, ptr3
|
|
|
|
.include "apple2.inc"
|
|
|
|
.proc _write
|
|
|
|
sta ptr2 ; Save count for later
|
|
stx ptr2+1
|
|
sta ptr3
|
|
sta ptr3+1 ; save for result
|
|
jsr popax ; get buf
|
|
sta ptr1
|
|
stx ptr1+1
|
|
jsr popax ; get fd and discard
|
|
L1: lda ptr2
|
|
ora ptr2+1 ; count zero?
|
|
beq L9
|
|
ldy #0
|
|
lda (ptr1),y
|
|
cmp #$0A ; Check for \n = Crtl-j
|
|
bne rawout
|
|
lda #$0D ; Issue cr
|
|
rawout:
|
|
ora #$80
|
|
jsr COUT
|
|
inc ptr1
|
|
bne L2
|
|
inc ptr1+1
|
|
L2: lda ptr2
|
|
bne L3
|
|
dec ptr2
|
|
dec ptr2+1
|
|
jmp L1
|
|
L3: dec ptr2
|
|
jmp L1
|
|
|
|
; No error, return count
|
|
|
|
L9: lda ptr3
|
|
ldx ptr3+1
|
|
rts
|
|
|
|
.endproc
|
|
|