H-DMA fix

zsnes/src/cpu/dma.asm

@@ -23,7 +23,7 @@ EXTSYM memtablew8,regptr
 EXTSYM dmadata
 EXTSYM hdmatype
 EXTSYM nexthdma
-EXTSYM curhdma,curypos,disablehdma,hdmadata,hdmadelay,hdmaearlstart
+EXTSYM curhdma,curypos,hdmadata,hdmadelay,hdmaearlstart
 EXTSYM resolutn
 EXTSYM memtabler16
 
@@ -771,6 +771,7 @@ NEWSYM setuphdma2
 
 NEWSYM hdmastartsc, db 0
 NEWSYM hdmarestart, db 0
+NEWSYM hdmaoff, db 0
 
 NEWSYM reg420Cw
 
@@ -778,8 +779,8 @@ NEWSYM reg420Cw
     mov bx,[resolutn]
     cmp word[curypos],bx
     jae near .nohdma
-    cmp byte[disablehdma],0
-    jne near .nohdma
+    cmp byte[hdmaoff],1
+    je near .nohdma
 ;    jmp starthdma
     mov al,[curhdma]
     mov [nexthdma],al
@@ -855,6 +856,7 @@ NEWSYM reg420Cw
     pop ebx
 ;    call exechdma
 ;    call exechdma
+    mov byte[hdmaoff],1
 .nohdma
     mov byte[hdmarestart],0
     ret

zsnes/src/init.asm

@@ -69,7 +69,7 @@ EXTSYM reg4read,resolutn,romdata,scrndis,spcBuffera,spcP,spcRam
 EXTSYM spcnumread,tableD,timeron,vidbright,DSPMem,OldGfxMode2
 EXTSYM SPC700read,SPC700write,GUIDoReset,spc700read
 EXTSYM InitC4,SA1Reset,SetAddressingModesSA1,SetAddressingModes,SDD1BankA,SPC7110init
-EXTSYM RTCinit,InitOBC
+EXTSYM RTCinit,InitOBC,hdmaoff
 EXTSYM memaccessspc7110r8,memaccessspc7110r16,memaccessspc7110w8
 EXTSYM memaccessspc7110w16
 EXTSYM ram7f,snesmap2,snesmmap,sram,MultiTap
@@ -1321,7 +1321,6 @@ 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
@@ -1454,7 +1453,6 @@ 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
@@ -1618,30 +1616,6 @@ 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'
@@ -1690,11 +1664,6 @@ 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.
@@ -1821,16 +1790,6 @@ 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
@@ -2121,7 +2080,6 @@ 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]
@@ -2170,6 +2128,7 @@ NEWSYM init65816
     mov byte[NMIEnab],1
     mov word[VIRQLoc],0
     mov byte[doirqnext],0
+    mov byte[hdmaoff],0
     mov dword[reg1read],0
     mov word[resolutn],224
     mov byte[vidbright],0