cc65/libsrc/atari/write.s

30 lines
790 B
ArmAsm

;
; int __fastcall__ write (int fd, const void* buf, unsigned count);
;
.include "atari.inc"
.import __rwsetup,__do_oserror,__inviocb,___oserror
.export _write
_write:
jsr __rwsetup ; do common setup
beq write9 ; if size 0, it's a no-op
cpx #$FF ; invalid iocb?
beq _inviocb
lda #PUTCHR
sta ICCOM,x
jsr CIOV
bpl write9
jmp __do_oserror ; update errno
write9:
lda ICBLL,x ; get buf len low
pha
lda ICBLH,x ; buf len high
tax
lda #0
sta ___oserror ; clear system dependend error code
pla
rts
_inviocb:
jmp __inviocb