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iigs-game-engine
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Fix nasty RTable initialization bug

This commit is contained in:
Lucas Scharenbroich 2022-05-22 23:52:54 -05:00
parent 8582ecb320
commit d27b10b6fd
1 changed files with 11 additions and 4 deletions
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15
src/Graphics.s
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@ -244,7 +244,7 @@ SetScreenRect sty ScreenHeight ; Save the screen height and
lda ScreenY0 ; Calculate the address of the first byte
asl ; of the right side of the playfield
tax
lda ScreenAddr,x ; This is the address for the left edge of the physical screen
lda ScreenAddr,x ; This is the address for the edge of the physical screen
clc
adc ScreenX1
dec
@ -252,9 +252,6 @@ SetScreenRect sty ScreenHeight ; Save the screen height and
ldx #0
ldy ScreenHeight
jsr :loop
pla ; Reset the address and continue filling in the
ldy ScreenHeight ; second half of the table
:loop clc
sta RTable,x
adc #160
@ -263,6 +260,16 @@ SetScreenRect sty ScreenHeight ; Save the screen height and
dey
bne :loop
ldy ScreenHeight
pla ; Reset the address and continue filling in the
:loop2 clc
sta RTable,x
adc #160
inx
inx
dey
bne :loop2
; Calculate the screen locations for each tile corner
lda ScreenY0 ; Calculate the address of the first byte