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Fixed a mode7 problem when center coordinates are negative.

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zsknight
2001-04-26 06:13:55 +00:00
parent 669bbb2da1
commit 7402690c08
2 changed files with 6 additions and 2 deletions
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6
zsnes/src/video/mode7.mac
View File

@@ -20,8 +20,6 @@
%macro Mode7Calculate 0
; mode 7, ax = curyposition, dx = curxposition (left side)
; draw center map coordinates at (X0-bg1scrolx,Y0-bg1scroly) on screen
@@ -33,6 +31,7 @@
test bx,0001000000000000b
jz .nonega
or bx,1110000000000000b
or word[mode7X0],1110000000000000b
.nonega
mov [.cxloc],bx
mov bx,dx
@@ -54,6 +53,7 @@
test bx,0001000000000000b
jz .nonegd
or bx,1110000000000000b
or word[mode7Y0],1110000000000000b
.nonegd
sub word[.cyloc],bx
@@ -113,6 +113,7 @@
test bx,0001000000000000b
jz .nonega
or bx,1110000000000000b
or word[mode7X0],1110000000000000b
.nonega
mov [.cxloc],bx
mov bx,dx
@@ -134,6 +135,7 @@
test bx,0001000000000000b
jz .nonegd
or bx,1110000000000000b
or word[mode7Y0],1110000000000000b
.nonegd
add bx,bx
sub word[.cyloc],bx

2
zsnes/src/video/mode716.mac
View File

@@ -109,6 +109,7 @@ EXTSYM pesimpng
test bx,0001000000000000b
jz .nonega
or bx,1110000000000000b
or word[mode7X0],1110000000000000b
.nonega
mov [mcxloc],bx
mov bx,dx
@@ -130,6 +131,7 @@ EXTSYM pesimpng
test bx,0001000000000000b
jz .nonegd
or bx,1110000000000000b
or word[mode7Y0],1110000000000000b
.nonegd
sub word[mcyloc],bx