diff options
Diffstat (limited to 'test/subroutine.s')
| -rw-r--r-- | test/subroutine.s | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/test/subroutine.s b/test/subroutine.s new file mode 100644 index 0000000..03447fd --- /dev/null +++ b/test/subroutine.s @@ -0,0 +1,45 @@ +.org $2000 +buf: + +.org $0 +ptr: +.qword buf + +.org $8000 +reset: + cps + ldx.w #$FFFF + txs +start: + ldy #0 + ldb #0 + inb + stb $C010 + deb + jsl clr_buf + jmp start + +clr_buf: + lda #0 + cpy.w #$1FFF + bcs clr_buf_end + sta.q (ptr), y + tya + adc #8 + tay + tba + sta.q (ptr), y + tya + adc #8 + tay + tba + jmp clr_buf +clr_buf_end: + ldy.w #0 + rtl + + +.org $FFC0 +.qword reset +done + |