initial import

git-svn-id: file:///home/notaz/opt/svn/PicoDrive@2 be3aeb3a-fb24-0410-a615-afba39da0efa
2025-09-06 07:38:05 -04:00 · 2006-12-19 20:53:21 +00:00 · 2006-12-19 20:53:21 +00:00 · cc68a136aa
commit cc68a136aa
parent 2cadbd5e56
341 changed files with 180839 additions and 0 deletions
--- a/platform/win32/GenaDrive/Emu.cpp
+++ b/platform/win32/GenaDrive/Emu.cpp
@ -0,0 +1,112 @@
+
+#include "app.h"
+
+extern "C" {
+struct Pico
+{
+  unsigned char ram[0x10000];  // 0x00000 scratch ram
+  unsigned short vram[0x8000]; // 0x10000
+  unsigned char zram[0x2000];  // 0x20000 Z80 ram
+  unsigned char ioports[0x10];
+  unsigned int pad[0x3c];      // unused
+  unsigned short cram[0x40];   // 0x22100
+  unsigned short vsram[0x40];  // 0x22180
+
+  unsigned char *rom;          // 0x22200
+  unsigned int romsize;        // 0x22204
+
+//  struct PicoMisc m;
+//  struct PicoVideo video;
+};
+  extern struct Pico Pico;
+}
+
+unsigned short *EmuScreen=NULL;
+extern "C" unsigned short *framebuff=NULL;
+int EmuWidth=0,EmuHeight=0;
+static int frame=0;
+static int EmuScan(unsigned int num, void *sdata);
+
+int EmuInit()
+{
+  int len=0;
+
+//  PicoOpt=-1;
+//  PsndRate=44100; PsndLen=DSoundSeg;
+
+  PicoInit();
+
+  // Allocate screen:
+  EmuWidth=320; EmuHeight=224;
+  len=EmuWidth*EmuHeight; len<<=1;
+  EmuScreen=(unsigned short *)malloc(len); if (EmuScreen==NULL) return 1;
+  framebuff=(unsigned short *)malloc((8+320)*(8+224+8)*2);
+  memset(EmuScreen,0,len);
+
+  PicoScan=EmuScan;
+
+  return 0;
+}
+
+void EmuExit()
+{
+  //RomFree();
+  free(EmuScreen); EmuScreen=NULL; // Deallocate screen
+  free(framebuff);
+  EmuWidth=EmuHeight=0;
+
+  PicoExit();
+}
+
+// Megadrive scanline callback:
+static int EmuScan(unsigned int num, void *sdata)
+{
+  unsigned short *pd=NULL,*end=NULL;
+  unsigned short *ps=NULL;
+
+  if (num>=(unsigned int)EmuHeight) return 0;
+
+  // Copy scanline to screen buffer:
+  pd=EmuScreen+(num<<8)+(num<<6); end=pd+320;
+  ps=(unsigned short *)sdata;
+
+  do { *pd++=(unsigned short)PicoCram(*ps++); } while (pd<end);
+  
+  return 0;
+}
+
+int EmuFrame()
+{
+  char map[12]={0,1,2,3,8,9,10,4,11,12,13,14};  // Joypads, format is UDLR BCAS ZYXM
+  int a=0,input=0;
+ 
+  // Set Megadrive buttons:
+  for (a=0;a<12;a++)
+  {
+    int m=map[a];
+    if (m>=0) if (Inp.button[m]>30) input|=1<<a;
+  }
+
+  PicoPad[0]=input;
+
+  frame++;
+  PsndOut=(short *)DSoundNext; PicoFrame(); PsndOut=NULL;
+
+  // rendermode2
+  if(PicoOpt&0x10) {
+	unsigned short *pd=EmuScreen;
+	unsigned char  *ps=(unsigned char*)framebuff+328*8;
+
+	unsigned short palHigh[0x40];
+	for(int i = 0; i < 0x40; i++)
+	  palHigh[i]=(unsigned short)PicoCram(Pico.cram[i]);
+
+    for(int y=0; y < 224; y++) {
+	  ps+=8;
+	  for(int x=0; x < 320; x++)
+		*pd++=palHigh[*ps++];
+	}
+  }
+
+  return 0;
+}