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climb: fix issue that crashed on real hardware

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we were indexing off the end of the sprite and on real hardware the
uninitialied pointers there indexed into bad places
This commit is contained in:
Vince Weaver 2024-09-19 21:55:02 -04:00
parent 8391455d46
commit 345214d6b4
1 changed files with 18 additions and 0 deletions
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18
games/peasant_mini/cliff/hgr_sprite_bg_mask.s
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@ -52,6 +52,24 @@ hgr_draw_sprite_bg_mask:
sta hdsb_ysize_smc+1 sta hdsb_ysize_smc+1
clc clc
adc CURSOR_Y adc CURSOR_Y
cmp #192
bcc hdsb_ysize_ok
hdsb_ysize_not_ok:
; adjust self modify
; want it to be (192-SPRITE_Y)
; lda #192
; sec
; sbc SPRITE_Y
; sta sprite_ysize_smc+1 ; self modify for end row
lda #191 ; max out yend
hdsb_ysize_ok:
sta save_yend,Y sta save_yend,Y
;================================ ;================================