1
0
mirror of https://github.com/cc65/cc65.git synced 2024-12-25 02:29:52 +00:00
cc65/libsrc/telestrat/read.s
jede 6f58b9a22d Correcting comments alignment
Correcting an address error in telestrat.inc when cleaning files which broke read.s primitive
2017-01-31 22:20:19 +01:00

44 lines
901 B
ArmAsm

;
; jede jede@oric.org 2017-01-22
;
.FEATURE c_comments,labels_without_colons,pc_assignment, loose_char_term
.export _read
.import popax
.include "zeropage.inc"
.include "telestrat.inc"
; int read (int fd, void* buf, unsigned count);
.proc _read
sta ptr1 ; count
stx ptr1+1 ; count
jsr popax ; get buf
sta PTR_READ_DEST
stx PTR_READ_DEST+1
sta ptr2 ; in order to calculate nb of bytes read
stx ptr2+1 ;
; jsr popax ; fp pointer don't care in this version
lda ptr1 ;
ldy ptr1+1 ;
BRK_TELEMON XFREAD ; calls telemon30 routine
; compute nb of bytes read
lda PTR_READ_DEST+1
sec
sbc ptr2+1
tax
lda PTR_READ_DEST
sec
sbc ptr2
; Here A and X contains number of bytes read
rts
.endproc