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Synertek Systems Sym-1 machine-specific files

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Wayne Parham
2021-05-09 16:34:53 -05:00
parent 07bd5089ec
commit 6e79379405
23 changed files with 2088 additions and 0 deletions
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libsrc/sym1/getchar.s Normal file
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; ---------------------------------------------------------------------------
; getchar.s
;
; for Sym-1
;
; Wayne Parham
; ---------------------------------------------------------------------------
.include "sym1.inc"
.export _getchar
.segment "CODE"
.proc _getchar: near
; ---------------------------------------------------------------------------
jsr INTCHR ; Get character using Monitor ROM call
and #$7F ; Strip off top bit
ldx #$00 ;
rts ; Return char
; ---------------------------------------------------------------------------
.endproc