DSP-4 Support (Quite buggy at the moment).

zsnes/src/chips/dsp4proc.asm

@@ -0,0 +1,62 @@
+;Copyright (C) 1997-2005 ZSNES Team ( zsKnight, _Demo_, pagefault, Nach )
+;
+;http://www.zsnes.com
+;http://sourceforge.net/projects/zsnes
+;
+;This program is free software; you can redistribute it and/or
+;modify it under the terms of the GNU General Public License
+;as published by the Free Software Foundation; either
+;version 2 of the License, or (at your option) any later
+;version.
+;
+;This program is distributed in the hope that it will be useful,
+;but WITHOUT ANY WARRANTY; without even the implied warranty of
+;MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;GNU General Public License for more details.
+;
+;You should have received a copy of the GNU General Public License
+;along with this program; if not, write to the Free Software
+;Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+%include "macros.mac"
+
+EXTSYM dsp4_address,dsp4_byte,DSP4GetByte,DSP4SetByte
+
+NEWSYM DSP4Read8b
+    mov word[dsp4_address],cx
+    pushad
+    call DSP4GetByte
+    popad
+    mov al,byte[dsp4_byte]
+    ret
+
+NEWSYM DSP4Write8b
+    mov word[dsp4_address],cx
+    mov byte[dsp4_byte],al
+    pushad
+    call DSP4SetByte
+    popad
+    ret
+    
+NEWSYM DSP4Read16b
+    mov word[dsp4_address],cx
+    pushad
+    call DSP4GetByte
+    popad
+    mov al,byte[dsp4_byte]
+    pushad
+    call DSP4GetByte
+    popad    
+    mov ah,byte[dsp4_byte]    
+    ret
+; 
+NEWSYM DSP4Write16b
+    mov word[dsp4_address],cx
+    mov byte[dsp4_byte],al
+    pushad
+    call DSP4SetByte
+    mov byte[dsp4_byte],ah
+    call DSP4SetByte
+    popad
+    ret
+