Undo changes

zsnes/src/cpu/dma.asm

@@ -23,7 +23,7 @@ EXTSYM memtablew8,regptr
 EXTSYM dmadata
 EXTSYM hdmatype
 EXTSYM nexthdma
-EXTSYM curhdma,curypos,pdh,cycphb,hdmadata,hdmadelay,hdmaearlstart
+EXTSYM curhdma,curypos,disablehdma,hdmadata,hdmadelay,hdmaearlstart
 EXTSYM resolutn
 EXTSYM memtabler16
 
@@ -778,9 +778,8 @@ NEWSYM reg420Cw
     mov bx,[resolutn]
     cmp word[curypos],bx
     jae near .nohdma
-    mov dh,[pdh]
-    cmp dh,[cycphb]
-    jb near .nohdma
+    cmp byte[disablehdma],0
+    jne near .nohdma
 ;    jmp starthdma
     mov al,[curhdma]
     mov [nexthdma],al

zsnes/src/init.asm

@@ -1320,6 +1320,7 @@ NEWSYM StoreBuffer, times 128*32 db 0
 
 SECTION .data
 NEWSYM execatzerovirq, db 0
+NEWSYM disablehdma,    db 0
 NEWSYM disableeffects, db 0
 NEWSYM hdmaearlstart,  db 0
 NEWSYM hdmadelay,      db 0
@@ -1451,6 +1452,7 @@ headerhack2:
 .mmx2head db 50,58,56,62,50,62,49,95,39,77,95,95,95,95,95,95,95,95,95,95
 
 NEWSYM headerhack
+    mov byte[disablehdma],0
     mov byte[Offby1line],0
     mov byte[CacheCheckSkip],0
     mov word[IRQHack],0
@@ -1616,6 +1618,30 @@ NEWSYM headerhack
     mov byte[opexec358],187
 .notds9
 
+    mov esi,[romdata]
+    add esi,0FFC0h
+    cmp dword[esi],'Baha'
+    jne .notbahamutlagoon
+    cmp dword[esi+4],'mut '
+    jne .notbahamutlagoon
+    cmp dword[esi+8],'Lago'
+    jne .notbahamutlagoon
+    mov byte[disablehdma],1
+.notbahamutlagoon
+
+    mov esi,[romdata]
+    add esi,07FC0h
+    cmp dword[esi],'MORT'
+    jne .notmk
+    cmp dword[esi+4],'AL K'
+    jne .notmk
+    cmp dword[esi+8],'OMBA'
+    jne .notmk
+    cmp dword[esi+12],'T   '
+    jne .notmk
+    mov byte[disablehdma],1
+.notmk
+
     mov esi,[romdata]
     add esi,0FFC0h
     cmp dword[esi],'CLOC'
@@ -1642,6 +1668,20 @@ NEWSYM headerhack
     mov byte[opexec358cph],58
 .notequinox
 
+    mov esi,[romdata]
+    add esi,07FC0h
+    cmp dword[esi],'DRAG'
+    jne .notdq5
+    cmp dword[esi+4],'ONQU'
+    jne .notdq5
+    cmp dword[esi+8],'EST5'
+    jne .notdq5
+    mov byte[opexec268],220
+    mov byte[opexec358],220
+    mov byte[opexec268cph],64
+    mov byte[opexec358cph],64
+.notdq5
+
     ; Lamborgini Challenge - -p 110
     mov esi,[romdata]
     add esi,07FC0h
@@ -1678,6 +1718,11 @@ NEWSYM headerhack
     mov byte[cycpblt],75
 .nottuffenuff
 
+    cmp byte[DSP1Type],0
+    je .notdis
+    mov byte[disablehdma],1
+.notdis
+
     ; Here are the individual game hacks.  Some of these probably can
     ;   be removed since many of them were created very early in ZSNES
     ;   development.
@@ -1803,6 +1848,16 @@ NEWSYM headerhack
     mov byte[opexec358cph],44
 .noromhead5
 
+    ; PunchOut - Disable HDMA start in middle of screen
+    mov esi,[romdata]
+    add esi,07FC0h
+    mov edi,.pouthead
+    call Checkheadersame
+    cmp al,0
+    jne .noromhead7
+    mov byte[disablehdma],1
+.noromhead7
+
     ; Front Mission - -p 140
     mov esi,[romdata]
     add esi,0FFC0h
@@ -2014,6 +2069,7 @@ NEWSYM init65816
 
     mov byte[prevoamptr],0FFh
     mov byte[execatzerovirq],0
+    mov byte[disablehdma],0
     mov byte[disableeffects],0
     mov byte[dracxhack],0
     mov al,[opexec268b]