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Rollback read.s

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This commit is contained in:
jede 2021-02-01 23:21:41 +01:00 committed by Oliver Schmidt
parent f622783ae1
commit b52ee25385
1 changed files with 5 additions and 17 deletions
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22
libsrc/telestrat/read.s
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@ -8,33 +8,21 @@
.include "zeropage.inc"
.include "telestrat.inc"
.include "fcntl.inc"
;int read (int fd, void* buf, unsigned count);
.proc _read
sta ptr1 ; count
stx ptr1+1 ; count
jsr popax ; get buf
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
sta ptr2 ; in order to calculate nb of bytes read
stx ptr2+1 ;
jsr popax ; fp pointer don't care in this version
cpx #$00
bne @is_not_stdin
cmp #STDIN_FILENO
bne @is_not_stdin
; stdin
@L1:
BRK_TELEMON XRD0 ; waits until key is pressed
bcs @L1
rts
; jsr popax ; fp pointer don't care in this version
@is_not_stdin:
lda ptr1 ;
ldy ptr1+1 ;
BRK_TELEMON XFREAD ; calls telemon30 routine