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cc65/libsrc/sym1/tapeio.s
2021-06-11 19:55:13 -05:00

48 lines
1.1 KiB
ArmAsm

;
; Wayne Parham (wayne@parhamdata.com)
;
; int __fastcall__ loadt (unsigned char id);
; int __fastcall__ dumpt (unsigned char id, void* start_addr, void* end_addr);
;
.include "sym1.inc"
.import popa, popax, return0, return1
.export _loadt, _dumpt
.segment "CODE"
.proc _loadt: near
sta P1L ; Tape record ID to P1L
ldx #$00
stx P1H
ldy #$80
jsr LOADT ; Read data from tape
bcs error
jmp return0 ; Return 0 if sucessful
error: jmp return1 ; or 1 if not
.endproc
.proc _dumpt: near
sta P3L ; End address
stx P3H
jsr popax
sta P2L ; Start address
stx P2H
jsr popa
sta P1L ; Tape Record ID
ldx #$00
stx P1H
ldy #$80
jsr DUMPT ; Write data to tape
bcs error
jmp return0 ; Return 0 if sucessful
error: jmp return1 ; or 1 if not
.endproc