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CATSFC/source/c4emu.cpp
Kitty Draper d40ae99422 first commit
2011-03-05 21:39:25 -05:00

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/*******************************************************************************
Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
(c) Copyright 1996 - 2002 Gary Henderson (gary.henderson@ntlworld.com) and
Jerremy Koot (jkoot@snes9x.com)
(c) Copyright 2001 - 2004 John Weidman (jweidman@slip.net)
(c) Copyright 2002 - 2004 Brad Jorsch (anomie@users.sourceforge.net),
funkyass (funkyass@spam.shaw.ca),
Joel Yliluoma (http://iki.fi/bisqwit/)
Kris Bleakley (codeviolation@hotmail.com),
Matthew Kendora,
Nach (n-a-c-h@users.sourceforge.net),
Peter Bortas (peter@bortas.org) and
zones (kasumitokoduck@yahoo.com)
C4 x86 assembler and some C emulation code
(c) Copyright 2000 - 2003 zsKnight (zsknight@zsnes.com),
_Demo_ (_demo_@zsnes.com), and Nach
C4 C++ code
(c) Copyright 2003 Brad Jorsch
DSP-1 emulator code
(c) Copyright 1998 - 2004 Ivar (ivar@snes9x.com), _Demo_, Gary Henderson,
John Weidman, neviksti (neviksti@hotmail.com),
Kris Bleakley, Andreas Naive
DSP-2 emulator code
(c) Copyright 2003 Kris Bleakley, John Weidman, neviksti, Matthew Kendora, and
Lord Nightmare (lord_nightmare@users.sourceforge.net
OBC1 emulator code
(c) Copyright 2001 - 2004 zsKnight, pagefault (pagefault@zsnes.com) and
Kris Bleakley
Ported from x86 assembler to C by sanmaiwashi
SPC7110 and RTC C++ emulator code
(c) Copyright 2002 Matthew Kendora with research by
zsKnight, John Weidman, and Dark Force
S-DD1 C emulator code
(c) Copyright 2003 Brad Jorsch with research by
Andreas Naive and John Weidman
S-RTC C emulator code
(c) Copyright 2001 John Weidman
ST010 C++ emulator code
(c) Copyright 2003 Feather, Kris Bleakley, John Weidman and Matthew Kendora
Super FX x86 assembler emulator code
(c) Copyright 1998 - 2003 zsKnight, _Demo_, and pagefault
Super FX C emulator code
(c) Copyright 1997 - 1999 Ivar, Gary Henderson and John Weidman
SH assembler code partly based on x86 assembler code
(c) Copyright 2002 - 2004 Marcus Comstedt (marcus@mc.pp.se)
Specific ports contains the works of other authors. See headers in
individual files.
Snes9x homepage: http://www.snes9x.com
Permission to use, copy, modify and distribute Snes9x in both binary and
source form, for non-commercial purposes, is hereby granted without fee,
providing that this license information and copyright notice appear with
all copies and any derived work.
This software is provided 'as-is', without any express or implied
warranty. In no event shall the authors be held liable for any damages
arising from the use of this software.
Snes9x is freeware for PERSONAL USE only. Commercial users should
seek permission of the copyright holders first. Commercial use includes
charging money for Snes9x or software derived from Snes9x.
The copyright holders request that bug fixes and improvements to the code
should be forwarded to them so everyone can benefit from the modifications
in future versions.
Super NES and Super Nintendo Entertainment System are trademarks of
Nintendo Co., Limited and its subsidiary companies.
*******************************************************************************/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <math.h>
#include "snes9x.h"
#include "sar.h"
#include "memmap.h"
#include "ppu.h"
#include "c4.h"
void S9xInitC4 ()
{
// Stupid zsnes code, we can't do the logical thing without breaking
// savestates
// Memory.C4RAM = &Memory.FillRAM [0x6000];
memset(Memory.C4RAM, 0, 0x2000);
}
uint8 S9xGetC4 (uint16 Address)
{
#ifdef DEBUGGER
if(Settings.BGLayering) printf("%02x from %04x\n", Memory.C4RAM[Address-0x6000], Address);
#endif
return (Memory.C4RAM [Address-0x6000]);
}
static uint8 C4TestPattern [12 * 4] =
{
0x00, 0x00, 0x00, 0xff,
0xff, 0xff, 0x00, 0xff,
0x00, 0x00, 0x00, 0xff,
0xff, 0xff, 0x00, 0x00,
0xff, 0xff, 0x00, 0x00,
0x80, 0xff, 0xff, 0x7f,
0x00, 0x80, 0x00, 0xff,
0x7f, 0x00, 0xff, 0x7f,
0xff, 0x7f, 0xff, 0xff,
0x00, 0x00, 0x01, 0xff,
0xff, 0xfe, 0x00, 0x01,
0x00, 0xff, 0xfe, 0x00
};
static void C4ConvOAM(void){
uint8 *OAMptr=Memory.C4RAM+(Memory.C4RAM[0x626]<<2);
for(uint8 *i=Memory.C4RAM+0x1fd; i>OAMptr; i-=4){
// Clear OAM-to-be
*i=0xe0;
}
uint16 globalX, globalY;
uint8 *OAMptr2;
int16 SprX, SprY;
uint8 SprName, SprAttr;
uint8 SprCount;
globalX=READ_WORD(Memory.C4RAM+0x0621);
globalY=READ_WORD(Memory.C4RAM+0x0623);
OAMptr2=Memory.C4RAM+0x200+(Memory.C4RAM[0x626]>>2);
#ifdef DEBUGGER
if(Memory.C4RAM[0x625]!=0) printf("$6625=%02x, expected 00\n", Memory.C4RAM[0x625]);
if((Memory.C4RAM[0x626]>>2)!=Memory.C4RAM[0x629]) printf("$6629=%02x, expected %02x\n", Memory.C4RAM[0x629], (Memory.C4RAM[0x626]>>2));
if(((uint16)Memory.C4RAM[0x626]<<2)!=READ_WORD(Memory.C4RAM+0x627)) printf("$6627=%04x, expected %04x\n", READ_WORD(Memory.C4RAM+0x627), ((uint16)Memory.C4RAM[0x626]<<2));
#endif
if(Memory.C4RAM[0x0620]!=0){
SprCount=128-Memory.C4RAM[0x626];
uint8 offset=(Memory.C4RAM[0x626]&3)*2;
for(int prio=0x30; prio>=0; prio-=0x10){
uint8 *srcptr=Memory.C4RAM+0x220;
for(int i=Memory.C4RAM[0x0620]; i>0 && SprCount>0; i--, srcptr+=16){
if((srcptr[4]&0x30)!=prio) continue;
SprX=READ_WORD(srcptr)-globalX;
SprY=READ_WORD(srcptr+2)-globalY;
SprName=srcptr[5];
SprAttr=srcptr[4] | srcptr[0x06]; // XXX: mask bits?
uint8 *sprptr=S9xGetMemPointer(READ_3WORD(srcptr+7));
if(*sprptr!=0){
int16 X, Y;
for(int SprCnt=*sprptr++; SprCnt>0 && SprCount>0; SprCnt--, sprptr+=4){
X=(int8)sprptr[1];
if(SprAttr&0x40){ // flip X
X=-X-((sprptr[0]&0x20)?16:8);
}
X+=SprX;
if(X>=-16 && X<=272){
Y=(int8)sprptr[2];
if(SprAttr&0x80){
Y=-Y-((sprptr[0]&0x20)?16:8);
}
Y+=SprY;
if(Y>=-16 && Y<=224){
OAMptr[0]=X&0xff;
OAMptr[1]=(uint8)Y;
OAMptr[2]=SprName+sprptr[3];
OAMptr[3]=SprAttr^(sprptr[0]&0xc0); // XXX: Carry from SprName addition?
*OAMptr2 &= ~(3<<offset);
if(X&0x100) *OAMptr2 |= 1<<offset;
if(sprptr[0]&0x20) *OAMptr2 |= 2<<offset;
OAMptr+=4;
SprCount--;
offset=(offset+2)&6;
if(offset==0) OAMptr2++;
}
}
}
} else if(SprCount>0){
OAMptr[0]=(uint8)SprX;
OAMptr[1]=(uint8)SprY;
OAMptr[2]=SprName;
OAMptr[3]=SprAttr;
*OAMptr2 &= ~(3<<offset);
if(SprX&0x100) *OAMptr2 |= 3<<offset;
else *OAMptr2 |= 2<<offset;
OAMptr+=4;
SprCount--;
offset=(offset+2)&6;
if(offset==0) OAMptr2++;
}
}
}
}
// XXX: Copy to OAM? I doubt it.
}
static void C4DoScaleRotate(int row_padding){
int16 A, B, C, D;
// Calculate matrix
int32 XScale=READ_WORD(Memory.C4RAM+0x1f8f);
if(XScale&0x8000) XScale=0x7fff;
int32 YScale=READ_WORD(Memory.C4RAM+0x1f92);
if(YScale&0x8000) YScale=0x7fff;
if(READ_WORD(Memory.C4RAM+0x1f80)==0)
{ // no rotation
// XXX: only do this for C and D?
// XXX: and then only when YScale is 0x1000?
A=(int16)XScale;
B=0;
C=0;
D=(int16)YScale;
}
else if(READ_WORD(Memory.C4RAM+0x1f80)==128){ // 90 degree rotation
// XXX: Really do this?
A=0;
B=(int16)(-YScale);
C=(int16)XScale;
D=0;
} else if(READ_WORD(Memory.C4RAM+0x1f80)==256){ // 180 degree rotation
// XXX: Really do this?
A=(int16)(-XScale);
B=0;
C=0;
D=(int16)(-YScale);
} else if(READ_WORD(Memory.C4RAM+0x1f80)==384){ // 270 degree rotation
// XXX: Really do this?
A=0;
B=(int16)YScale;
C=(int16)(-XScale);
D=0;
} else {
A=(int16)SAR(C4CosTable[READ_WORD(Memory.C4RAM+0x1f80)&0x1ff]*XScale, 15);
B=(int16)(-SAR(C4SinTable[READ_WORD(Memory.C4RAM+0x1f80)&0x1ff]*YScale, 15));
C=(int16)SAR(C4SinTable[READ_WORD(Memory.C4RAM+0x1f80)&0x1ff]*XScale, 15);
D=(int16)SAR(C4CosTable[READ_WORD(Memory.C4RAM+0x1f80)&0x1ff]*YScale, 15);
}
// Calculate Pixel Resolution
uint8 w=Memory.C4RAM[0x1f89]&~7;
uint8 h=Memory.C4RAM[0x1f8c]&~7;
// printf("%dx%d XScale=%04x YScale=%04x angle=%03x\n", w, h, XScale, YScale, READ_WORD(Memory.C4RAM+0x1f80)&0x1ff);
// printf("Matrix: [%10g %10g] [%04x %04x]\n", A/4096.0, B/4096.0, A&0xffff, B&0xffff);
// printf(" [%10g %10g] [%04x %04x]\n", C/4096.0, D/4096.0, C&0xffff, D&0xffff);
// Clear the output RAM
memset(Memory.C4RAM, 0, (w+row_padding/4)*h/2);
int32 Cx=(int16)READ_WORD(Memory.C4RAM+0x1f83);
int32 Cy=(int16)READ_WORD(Memory.C4RAM+0x1f86);
#ifdef DEBUGGER
if(Memory.C4RAM[0x1f97]!=0) printf("$7f97=%02x, expected 00\n", Memory.C4RAM[0x1f97]);
if((Cx&~1)!=w/2 || (Cy&~1)!=h/2) printf("Center is not middle of image! (%d, %d) != (%d, %d)\n", Cx, Cy, w/2, h/2);
#endif
// Calculate start position (i.e. (Ox, Oy) = (0, 0))
// The low 12 bits are fractional, so (Cx<<12) gives us the Cx we want in
// the function. We do Cx*A etc normally because the matrix parameters
// already have the fractional parts.
int32 LineX=(Cx<<12) - Cx*A - Cx*B;
int32 LineY=(Cy<<12) - Cy*C - Cy*D;
// Start loop
uint32 X, Y;
uint8 byte;
int outidx=0;
uint8 bit=0x80;
for(int y=0; y<h; y++){
X=LineX;
Y=LineY;
for(int x=0; x<w; x++){
if((X>>12)>=w || (Y>>12)>=h){
byte=0;
} else {
uint32 addr=(Y>>12)*w+(X>>12);
byte=Memory.C4RAM[0x600+(addr>>1)];
if(addr&1) byte>>=4;
}
// De-bitplanify
if(byte&1) Memory.C4RAM[outidx]|=bit;
if(byte&2) Memory.C4RAM[outidx+1]|=bit;
if(byte&4) Memory.C4RAM[outidx+16]|=bit;
if(byte&8) Memory.C4RAM[outidx+17]|=bit;
bit>>=1;
if(bit==0){
bit=0x80;
outidx+=32;
}
X+=A; // Add 1 to output x => add an A and a C
Y+=C;
}
outidx+=2+row_padding;
if(outidx&0x10){
outidx&=~0x10;
} else {
outidx-=w*4+row_padding;
}
LineX+=B; // Add 1 to output y => add a B and a D
LineY+=D;
}
}
static void C4DrawLine(int32 X1, int32 Y1, int16 Z1,
int32 X2, int32 Y2, int16 Z2, uint8 Color){
// Transform coordinates
C4WFXVal=(short)X1;
C4WFYVal=(short)Y1;
C4WFZVal=Z1;
C4WFScale=Memory.C4RAM[0x1f90];
C4WFX2Val=Memory.C4RAM[0x1f86];
C4WFY2Val=Memory.C4RAM[0x1f87];
C4WFDist=Memory.C4RAM[0x1f88];
C4TransfWireFrame2();
X1=(C4WFXVal+48)<<8;
Y1=(C4WFYVal+48)<<8;
C4WFXVal=(short)X2;
C4WFYVal=(short)Y2;
C4WFZVal=Z2;
C4TransfWireFrame2();
X2=(C4WFXVal+48)<<8;
Y2=(C4WFYVal+48)<<8;
// get line info
C4WFXVal=(short)(X1>>8);
C4WFYVal=(short)(Y1>>8);
C4WFX2Val=(short)(X2>>8);
C4WFY2Val=(short)(Y2>>8);
C4CalcWireFrame();
X2=(int16)C4WFXVal;
Y2=(int16)C4WFYVal;
// render line
for(int i=C4WFDist?C4WFDist:1; i>0; i--)
{ //.loop
if(X1>0xff && Y1>0xff && X1<0x6000 && Y1<0x6000)
{
uint16 addr=((X1&~0x7ff) + (Y1&~0x7ff)*12 + (Y1&0x700))>>7;
addr=(((Y1>>8)>>3)<<8)-(((Y1>>8)>>3)<<6)+(((X1>>8)>>3)<<4)+((Y1>>8)&7)*2;
uint8 bit=0x80>>((X1>>8)&7);
Memory.C4RAM[addr+0x300]&=~bit;
Memory.C4RAM[addr+0x301]&=~bit;
if(Color&1) Memory.C4RAM[addr+0x300]|=bit;
if(Color&2) Memory.C4RAM[addr+0x301]|=bit;
}
X1+=X2;
Y1+=Y2;
}
}
static void C4DrawWireFrame(void)
{
uint8 *line=S9xGetMemPointer(READ_3WORD(Memory.C4RAM+0x1f80));
uint8 *point1, *point2;
int16 X1, Y1, Z1;
int16 X2, Y2, Z2;
uint8 Color;
#ifdef DEBUGGER
if(READ_3WORD(Memory.C4RAM+0x1f8f)&0xff00ff) printf("wireframe: Unexpected value in $7f8f: %06x\n", READ_3WORD(Memory.C4RAM+0x1f8f));
if(READ_3WORD(Memory.C4RAM+0x1fa4)!=0x001000) printf("wireframe: Unexpected value in $7fa4: %06x\n", READ_3WORD(Memory.C4RAM+0x1fa4));
#endif
for(int i=Memory.C4RAM[0x0295]; i>0; i--, line+=5){
if(line[0]==0xff && line[1]==0xff){
uint8 *tmp=line-5;
while(line[2]==0xff && line[3]==0xff) tmp-=5;
point1=S9xGetMemPointer((Memory.C4RAM[0x1f82]<<16) | (tmp[2]<<8) | tmp[3]);
} else {
point1=S9xGetMemPointer((Memory.C4RAM[0x1f82]<<16) | (line[0]<<8) | line[1]);
}
point2=S9xGetMemPointer((Memory.C4RAM[0x1f82]<<16) | (line[2]<<8) | line[3]);
X1=(point1[0]<<8) | point1[1];
Y1=(point1[2]<<8) | point1[3];
Z1=(point1[4]<<8) | point1[5];
X2=(point2[0]<<8) | point2[1];
Y2=(point2[2]<<8) | point2[3];
Z2=(point2[4]<<8) | point2[5];
Color=line[4];
C4DrawLine(X1, Y1, Z1, X2, Y2, Z2, Color);
}
}
static void C4TransformLines(void){
C4WFX2Val=Memory.C4RAM[0x1f83];
C4WFY2Val=Memory.C4RAM[0x1f86];
C4WFDist=Memory.C4RAM[0x1f89];
C4WFScale=Memory.C4RAM[0x1f8c];
#ifdef DEBUGGER
if(Memory.C4RAM[0x1f8a]!=0x90) printf("lines: $7f8a = %02x, expected 90\n", READ_WORD(Memory.C4RAM+0x1f8a));
#endif
// transform vertices
uint8 *ptr=Memory.C4RAM;
{
for(int i=READ_WORD(Memory.C4RAM+0x1f80); i>0; i--, ptr+=0x10)
{
C4WFXVal=READ_WORD(ptr+1);
C4WFYVal=READ_WORD(ptr+5);
C4WFZVal=READ_WORD(ptr+9);
C4TransfWireFrame();
// displace
WRITE_WORD(ptr+1, C4WFXVal+0x80);
WRITE_WORD(ptr+5, C4WFYVal+0x50);
}
}
WRITE_WORD(Memory.C4RAM+0x600, 23);
WRITE_WORD(Memory.C4RAM+0x602, 0x60);
WRITE_WORD(Memory.C4RAM+0x605, 0x40);
WRITE_WORD(Memory.C4RAM+0x600+8, 23);
WRITE_WORD(Memory.C4RAM+0x602+8, 0x60);
WRITE_WORD(Memory.C4RAM+0x605+8, 0x40);
ptr=Memory.C4RAM+0xb02;
uint8 *ptr2=Memory.C4RAM;
{
for(int i=READ_WORD(Memory.C4RAM+0xb00); i>0; i--, ptr+=2, ptr2+=8)
{
C4WFXVal=READ_WORD(Memory.C4RAM+(ptr[0]<<4)+1);
C4WFYVal=READ_WORD(Memory.C4RAM+(ptr[0]<<4)+5);
C4WFX2Val=READ_WORD(Memory.C4RAM+(ptr[1]<<4)+1);
C4WFY2Val=READ_WORD(Memory.C4RAM+(ptr[1]<<4)+5);
C4CalcWireFrame();
WRITE_WORD(ptr2+0x600, C4WFDist?C4WFDist:1);
WRITE_WORD(ptr2+0x602, C4WFXVal);
WRITE_WORD(ptr2+0x605, C4WFYVal);
}
}
}
static void C4BitPlaneWave(){
static uint16 bmpdata[]={
0x0000, 0x0002, 0x0004, 0x0006, 0x0008, 0x000A, 0x000C, 0x000E,
0x0200, 0x0202, 0x0204, 0x0206, 0x0208, 0x020A, 0x020C, 0x020E,
0x0400, 0x0402, 0x0404, 0x0406, 0x0408, 0x040A, 0x040C, 0x040E,
0x0600, 0x0602, 0x0604, 0x0606, 0x0608, 0x060A, 0x060C, 0x060E,
0x0800, 0x0802, 0x0804, 0x0806, 0x0808, 0x080A, 0x080C, 0x080E
};
uint8 *dst=Memory.C4RAM;
uint32 waveptr=Memory.C4RAM[0x1f83];
uint16 mask1=0xc0c0;
uint16 mask2=0x3f3f;
#ifdef DEBUGGER
if(READ_3WORD(Memory.C4RAM+0x1f80) != Memory.C4RAM[waveptr+0xb00]) printf("$7f80=%06x, expected %02x\n", READ_3WORD(Memory.C4RAM+0x1f80), Memory.C4RAM[waveptr+0xb00]);
#endif
for(int j=0; j<0x10; j++){
do {
int16 height=-((int8)Memory.C4RAM[waveptr+0xb00])-16;
for(int i=0; i<40; i++){
uint16 tmp=READ_WORD(dst+bmpdata[i]) & mask2;
if(height>=0){
if(height<8){
tmp|=mask1&READ_WORD(Memory.C4RAM+0xa00+height*2);
} else {
tmp|=mask1&0xff00;
}
}
WRITE_WORD(dst+bmpdata[i], tmp);
height++;
}
waveptr=(waveptr+1)&0x7f;
mask1=(mask1>>2)|(mask1<<6);
mask2=(mask2>>2)|(mask2<<6);
} while(mask1!=0xc0c0);
dst+=16;
do {
int16 height=-((int8)Memory.C4RAM[waveptr+0xb00])-16;
for(int i=0; i<40; i++){
uint16 tmp=READ_WORD(dst+bmpdata[i]) & mask2;
if(height>=0){
if(height<8){
tmp|=mask1&READ_WORD(Memory.C4RAM+0xa10+height*2);
} else {
tmp|=mask1&0xff00;
}
}
WRITE_WORD(dst+bmpdata[i], tmp);
height++;
}
waveptr=(waveptr+1)&0x7f;
mask1=(mask1>>2)|(mask1<<6);
mask2=(mask2>>2)|(mask2<<6);
} while(mask1!=0xc0c0);
dst+=16;
}
}
static void C4SprDisintegrate()
{
uint8 width, height;
uint32 StartX, StartY;
uint8 *src;
int32 scaleX, scaleY;
int32 Cx, Cy;
width=Memory.C4RAM[0x1f89];
height=Memory.C4RAM[0x1f8c];
Cx=(int16)READ_WORD(Memory.C4RAM+0x1f80);
Cy=(int16)READ_WORD(Memory.C4RAM+0x1f83);
#ifdef DEBUGGER
if((Cx&~1)!=width/2 || (Cy&~1)!=height/2) printf("Center is not middle of image for disintegrate! (%d, %d) != (%d, %d)\n", Cx, Cy, width/2, height/2);
#endif
scaleX=(int16)READ_WORD(Memory.C4RAM+0x1f86);
scaleY=(int16)READ_WORD(Memory.C4RAM+0x1f8f);
StartX=-Cx*scaleX+(Cx<<8);
StartY=-Cy*scaleY+(Cy<<8);
src=Memory.C4RAM+0x600;
memset(Memory.C4RAM, 0, width*height/2);
for(uint32 y=StartY, i=0; i<height; i++, y+=scaleY)
{
for(uint32 x=StartX, j=0; j<width; j++, x+=scaleX)
{
if((x>>8)<width && (y>>8)<height && (y>>8)*width+(x>>8)<0x2000)
{
uint8 pixel=(j&1)?(*src>>4):*src;
int idx=(y>>11)*width*4+(x>>11)*32+((y>>8)&7)*2;
uint8 mask=0x80>>((x>>8)&7);
if(pixel&1) Memory.C4RAM[idx]|=mask;
if(pixel&2) Memory.C4RAM[idx+1]|=mask;
if(pixel&4) Memory.C4RAM[idx+16]|=mask;
if(pixel&8) Memory.C4RAM[idx+17]|=mask;
}
if(j&1) src++;
}
}
}
static void S9xC4ProcessSprites()
{
switch(Memory.C4RAM[0x1f4d])
{
case 0x00: // Build OAM
#ifdef DEBUGGER
// printf("00 00 Build OAM!\n");
#endif
C4ConvOAM();
break;
case 0x03: // Scale/Rotate
#ifdef DEBUGGER
// printf("00 03 Scale/Rotate!\n");
#endif
C4DoScaleRotate(0);
break;
case 0x05: // Transform Lines
#ifdef DEBUGGER
// printf("00 05 Transform Lines!\n");
#endif
C4TransformLines();
break;
case 0x07: // Scale/Rotate
#ifdef DEBUGGER
// printf("00 07 Scale/Rotate!\n");
#endif
C4DoScaleRotate(64);
break;
case 0x08: // Draw wireframe
#ifdef DEBUGGER
// printf("00 08 Draw wireframe!\n");
#endif
C4DrawWireFrame();
break;
case 0x0b: // Disintegrate
#ifdef DEBUGGER
printf("00 0b Disintegrate!\n");
#endif
C4SprDisintegrate();
break;
case 0x0c: // Wave
#ifdef DEBUGGER
// printf("00 0b Wave!\n");
#endif
C4BitPlaneWave();
break;
default:
#ifdef DEBUGGER
printf ("Unknown C4 sprite command (%02x)\n", Memory.C4RAM [0x1f4d]);
#endif
break;
}
}
void S9xSetC4 (uint8 byte, uint16 Address)
{
int i;
#ifdef DEBUGGER
if(Settings.BGLayering) printf("%02x to %04x\n", byte, Address);
#endif
Memory.C4RAM [Address-0x6000] = byte;
if (Address == 0x7f4f)
{
if(Memory.C4RAM[0x1f4d]==0x0e && byte<0x40 && (byte&3)==0)
{
#ifdef DEBUGGER
printf("Test command %02x 0e used!\n", byte);
#endif
Memory.C4RAM[0x1f80]=byte>>2;
}
else
{
switch (byte)
{
case 0x00: // Sprite
S9xC4ProcessSprites();
break;
case 0x01: // Draw wireframe
#ifdef DEBUGGER
//printf("01 Draw wireframe used!\n");
if(Memory.C4RAM[0x1f4d]!=8) printf("$7f4d=%02x, expected 08 for command 01 %02x\n", Memory.C4RAM[0x1f4d], Memory.C4RAM[0x1f4d]);
#endif
memset(Memory.C4RAM+0x300, 0, 16*12*3*4);
C4DrawWireFrame();
break;
case 0x05: // Propulsion (?)
#ifdef DEBUGGER
printf("05 Propulsion (?)!\n");
if(Memory.C4RAM[0x1f4d]!=2) printf("$7f4d=%02x, expected 02 for command 05 %02x\n", Memory.C4RAM[0x1f4d], Memory.C4RAM[0x1f4d]);
#endif
{
int32 tmp=0x10000;
if(READ_WORD(Memory.C4RAM+0x1f83)){
tmp=SAR((tmp/READ_WORD(Memory.C4RAM+0x1f83))*READ_WORD(Memory.C4RAM+0x1f81), 8);
}
WRITE_WORD(Memory.C4RAM+0x1f80, (uint16)tmp);
}
break;
case 0x0d: // Set vector length
#ifdef DEBUGGER
printf("0d Set vector length!\n");
if(Memory.C4RAM[0x1f4d]!=2) printf("$7f4d=%02x, expected 02 for command 0d %02x\n", Memory.C4RAM[0x1f4d], Memory.C4RAM[0x1f4d]);
#endif
C41FXVal=READ_WORD(Memory.C4RAM+0x1f80);
C41FYVal=READ_WORD(Memory.C4RAM+0x1f83);
C41FDistVal=READ_WORD(Memory.C4RAM+0x1f86);
C4Op0D();
WRITE_WORD(Memory.C4RAM+0x1f89, C41FXVal);
WRITE_WORD(Memory.C4RAM+0x1f8c, C41FYVal);
break;
case 0x10: // Polar to rectangluar
#ifdef DEBUGGER
// printf("10 Polar->Rect!\n");
if(Memory.C4RAM[0x1f4d]!=2) printf("$7f4d=%02x, expected 02 for command 10 %02x\n", Memory.C4RAM[0x1f4d], Memory.C4RAM[0x1f4d]);
#endif
{
int32 tmp=SAR((int32)READ_WORD(Memory.C4RAM+0x1f83)*C4CosTable[READ_WORD(Memory.C4RAM+0x1f80)&0x1ff]*2, 16);
WRITE_3WORD(Memory.C4RAM+0x1f86, tmp);
tmp=SAR((int32)READ_WORD(Memory.C4RAM+0x1f83)*C4SinTable[READ_WORD(Memory.C4RAM+0x1f80)&0x1ff]*2, 16);
WRITE_3WORD(Memory.C4RAM+0x1f89, (tmp-SAR(tmp, 6)));
}
break;
case 0x13: // Polar to rectangluar
#ifdef DEBUGGER
// printf("13 Polar->Rect!\n");
if(Memory.C4RAM[0x1f4d]!=2) printf("$7f4d=%02x, expected 02 for command 13 %02x\n", Memory.C4RAM[0x1f4d], Memory.C4RAM[0x1f4d]);
#endif
{
int32 tmp=SAR((int32)READ_WORD(Memory.C4RAM+0x1f83)*C4CosTable[READ_WORD(Memory.C4RAM+0x1f80)&0x1ff]*2, 8);
WRITE_3WORD(Memory.C4RAM+0x1f86, tmp);
tmp=SAR((int32)READ_WORD(Memory.C4RAM+0x1f83)*C4SinTable[READ_WORD(Memory.C4RAM+0x1f80)&0x1ff]*2, 8);
WRITE_3WORD(Memory.C4RAM+0x1f89, tmp);
}
break;
case 0x15: // Pythagorean
#ifdef DEBUGGER
printf("15 Pythagorean!\n");
if(Memory.C4RAM[0x1f4d]!=2) printf("$7f4d=%02x, expected 02 for command 15 %02x\n", Memory.C4RAM[0x1f4d], Memory.C4RAM[0x1f4d]);
#endif
C41FXVal=READ_WORD(Memory.C4RAM+0x1f80);
C41FYVal=READ_WORD(Memory.C4RAM+0x1f83);
C41FDist=(int16)sqrt((double)C41FXVal*C41FXVal + (double)C41FYVal*C41FYVal);
WRITE_WORD(Memory.C4RAM+0x1f80, C41FDist);
break;
case 0x1f: // atan
#ifdef DEBUGGER
// printf("1f atan!\n");
if(Memory.C4RAM[0x1f4d]!=2) printf("$7f4d=%02x, expected 02 for command 1f %02x\n", Memory.C4RAM[0x1f4d], Memory.C4RAM[0x1f4d]);
#endif
C41FXVal=READ_WORD(Memory.C4RAM+0x1f80);
C41FYVal=READ_WORD(Memory.C4RAM+0x1f83);
C4Op1F();
WRITE_WORD(Memory.C4RAM+0x1f86, C41FAngleRes);
break;
case 0x22: // Trapezoid
{
#ifdef DEBUGGER
// printf("22 Trapezoid!\n");
if(Memory.C4RAM[0x1f4d]!=2) printf("$7f4d=%02x, expected 02 for command 22 %02x\n", Memory.C4RAM[0x1f4d], Memory.C4RAM[0x1f4d]);
#endif
int16 angle1=READ_WORD(Memory.C4RAM+0x1f8c)&0x1ff;
int16 angle2=READ_WORD(Memory.C4RAM+0x1f8f)&0x1ff;
#ifdef DEBUGGER
if(C4CosTable[angle1]==0) fprintf(stderr, "22 Trapezoid: Invalid tangent! angle1=%d\n", angle1);
if(C4CosTable[angle2]==0) fprintf(stderr, "22 Trapezoid: Invalid tangent! angle2=%d\n", angle2);
#endif
int32 tan1=(C4CosTable[angle1]!=0)?((((int32)C4SinTable[angle1])<<16)/C4CosTable[angle1]):0x80000000;
int32 tan2=(C4CosTable[angle2]!=0)?((((int32)C4SinTable[angle2])<<16)/C4CosTable[angle2]):0x80000000;
int16 y = READ_WORD(Memory.C4RAM+0x1f83) - READ_WORD(Memory.C4RAM+0x1f89);
int16 left, right;
for(int j=0; j<225; j++)
{
if(y>=0)
{
left = SAR((int32)tan1*y, 16) -
READ_WORD(Memory.C4RAM+0x1f80) +
READ_WORD(Memory.C4RAM+0x1f86);
right = SAR((int32)tan2*y, 16) -
READ_WORD(Memory.C4RAM+0x1f80) +
READ_WORD(Memory.C4RAM+0x1f86) +
READ_WORD(Memory.C4RAM+0x1f93);
if(left<0 && right<0){
left=1;
right=0;
} else if(left<0){
left=0;
} else if(right<0){
right=0;
}
if(left>255 && right>255){
left=255;
right=254;
} else if(left>255){
left=255;
} else if(right>255){
right=255;
}
}
else
{
left=1;
right=0;
}
Memory.C4RAM[j+0x800] = (uint8)left;
Memory.C4RAM[j+0x900] = (uint8)right;
y++;
}
}
break;
case 0x25: // Multiply
#ifdef DEBUGGER
printf("25 Multiply!\n");
if(Memory.C4RAM[0x1f4d]!=2) printf("$7f4d=%02x, expected 02 for command 25 %02x\n", Memory.C4RAM[0x1f4d], Memory.C4RAM[0x1f4d]);
#endif
{
int32 foo=READ_3WORD(Memory.C4RAM+0x1f80);
int32 bar=READ_3WORD(Memory.C4RAM+0x1f83);
foo*=bar;
WRITE_3WORD(Memory.C4RAM+0x1f80, foo);
}
break;
case 0x2d: // Transform Coords
#ifdef DEBUGGER
// printf("2d Transform Coords!\n");
if(Memory.C4RAM[0x1f4d]!=2) printf("$7f4d=%02x, expected 02 for command 2d %02x\n", Memory.C4RAM[0x1f4d], Memory.C4RAM[0x1f4d]);
if(READ_3WORD(Memory.C4RAM+0x1f8f)&0xff00ff) printf("2d transform coords: Unexpected value in $7f8f: %06x\n", READ_3WORD(Memory.C4RAM+0x1f8f));
if(READ_3WORD(Memory.C4RAM+0x1f8c)!=0x001000) printf("0d transform coords: Unexpected value in $7f8c: %06x\n", READ_3WORD(Memory.C4RAM+0x1f8c));
#endif
C4WFXVal=READ_WORD(Memory.C4RAM+0x1f81);
C4WFYVal=READ_WORD(Memory.C4RAM+0x1f84);
C4WFZVal=READ_WORD(Memory.C4RAM+0x1f87);
C4WFX2Val=Memory.C4RAM[0x1f89];
C4WFY2Val=Memory.C4RAM[0x1f8a];
C4WFDist=Memory.C4RAM[0x1f8b];
C4WFScale=READ_WORD(Memory.C4RAM+0x1f90);
C4TransfWireFrame2();
WRITE_WORD(Memory.C4RAM+0x1f80, C4WFXVal);
WRITE_WORD(Memory.C4RAM+0x1f83, C4WFYVal);
break;
case 0x40: // Sum
#ifdef DEBUGGER
printf("40 Sum!\n");
if(Memory.C4RAM[0x1f4d]!=0x0e) printf("$7f4d=%02x, expected 0e for command 40 %02x\n", Memory.C4RAM[0x1f4d], Memory.C4RAM[0x1f4d]);
#endif
{
uint16 sum=0;
for(int i=0; i<0x800; sum+=Memory.C4RAM[i++]);
WRITE_WORD(Memory.C4RAM+0x1f80, sum);
}
break;
case 0x54: // Square
#ifdef DEBUGGER
printf("54 Square!\n");
if(Memory.C4RAM[0x1f4d]!=0x0e) printf("$7f4d=%02x, expected 0e for command 54 %02x\n", Memory.C4RAM[0x1f4d], Memory.C4RAM[0x1f4d]);
#endif
{
int64 a=SAR((int64)READ_3WORD(Memory.C4RAM+0x1f80)<<40, 40);
// printf("%08X%08X\n", (uint32)(a>>32), (uint32)(a&0xFFFFFFFF));
a*=a;
// printf("%08X%08X\n", (uint32)(a>>32), (uint32)(a&0xFFFFFFFF));
WRITE_3WORD(Memory.C4RAM+0x1f83, a);
WRITE_3WORD(Memory.C4RAM+0x1f86, (a>>24));
}
break;
case 0x5c: // Immediate Reg
#ifdef DEBUGGER
printf("5c Immediate Reg!\n");
if(Memory.C4RAM[0x1f4d]!=0x0e) printf("$7f4d=%02x, expected 0e for command 5c %02x\n", Memory.C4RAM[0x1f4d], Memory.C4RAM[0x1f4d]);
#endif
for (i = 0; i < 12 * 4; i++)
Memory.C4RAM [i] = C4TestPattern [i];
break;
case 0x89: // Immediate ROM
#ifdef DEBUGGER
printf("89 Immediate ROM!\n");
if(Memory.C4RAM[0x1f4d]!=0x0e) printf("$7f4d=%02x, expected 0e for command 89 %02x\n", Memory.C4RAM[0x1f4d], Memory.C4RAM[0x1f4d]);
#endif
Memory.C4RAM [0x1f80] = 0x36;
Memory.C4RAM [0x1f81] = 0x43;
Memory.C4RAM [0x1f82] = 0x05;
break;
default:
#ifdef DEBUGGER
printf ("Unknown C4 command (%02x)\n", byte);
#endif
break;
}
}
} else if (Address == 0x7f47) {
#ifdef DEBUGGER
// printf("C4 load memory %06x => %04x, %04x bytes\n", READ_3WORD(Memory.C4RAM+0x1f40), READ_WORD(Memory.C4RAM+0x1f45), READ_WORD(Memory.C4RAM+0x1f43));
if(byte != 0) printf("C4 load: non-0 written to $7f47! Wrote %02x\n", byte);
if(READ_WORD(Memory.C4RAM+0x1f45) < 0x6000 || (READ_WORD(Memory.C4RAM+0x1f45) + READ_WORD(Memory.C4RAM+0x1f43)) > 0x6c00) printf("C4 load: Dest unusual! It's %04x\n", READ_WORD(Memory.C4RAM+0x1f45));
#endif
memmove(Memory.C4RAM+(READ_WORD(Memory.C4RAM+0x1f45)&0x1fff),
S9xGetMemPointer(READ_3WORD(Memory.C4RAM+0x1f40)),
READ_WORD(Memory.C4RAM+0x1f43));
}
}
int16 C4SinTable[512] = {
0, 402, 804, 1206, 1607, 2009, 2410, 2811,
3211, 3611, 4011, 4409, 4808, 5205, 5602, 5997,
6392, 6786, 7179, 7571, 7961, 8351, 8739, 9126,
9512, 9896, 10278, 10659, 11039, 11416, 11793, 12167,
12539, 12910, 13278, 13645, 14010, 14372, 14732, 15090,
15446, 15800, 16151, 16499, 16846, 17189, 17530, 17869,
18204, 18537, 18868, 19195, 19519, 19841, 20159, 20475,
20787, 21097, 21403, 21706, 22005, 22301, 22594, 22884,
23170, 23453, 23732, 24007, 24279, 24547, 24812, 25073,
25330, 25583, 25832, 26077, 26319, 26557, 26790, 27020,
27245, 27466, 27684, 27897, 28106, 28310, 28511, 28707,
28898, 29086, 29269, 29447, 29621, 29791, 29956, 30117,
30273, 30425, 30572, 30714, 30852, 30985, 31114, 31237,
31357, 31471, 31581, 31685, 31785, 31881, 31971, 32057,
32138, 32214, 32285, 32351, 32413, 32469, 32521, 32568,
32610, 32647, 32679, 32706, 32728, 32745, 32758, 32765,
32767, 32765, 32758, 32745, 32728, 32706, 32679, 32647,
32610, 32568, 32521, 32469, 32413, 32351, 32285, 32214,
32138, 32057, 31971, 31881, 31785, 31685, 31581, 31471,
31357, 31237, 31114, 30985, 30852, 30714, 30572, 30425,
30273, 30117, 29956, 29791, 29621, 29447, 29269, 29086,
28898, 28707, 28511, 28310, 28106, 27897, 27684, 27466,
27245, 27020, 26790, 26557, 26319, 26077, 25832, 25583,
25330, 25073, 24812, 24547, 24279, 24007, 23732, 23453,
23170, 22884, 22594, 22301, 22005, 21706, 21403, 21097,
20787, 20475, 20159, 19841, 19519, 19195, 18868, 18537,
18204, 17869, 17530, 17189, 16846, 16499, 16151, 15800,
15446, 15090, 14732, 14372, 14010, 13645, 13278, 12910,
12539, 12167, 11793, 11416, 11039, 10659, 10278, 9896,
9512, 9126, 8739, 8351, 7961, 7571, 7179, 6786,
6392, 5997, 5602, 5205, 4808, 4409, 4011, 3611,
3211, 2811, 2410, 2009, 1607, 1206, 804, 402,
0, -402, -804, -1206, -1607, -2009, -2410, -2811,
-3211, -3611, -4011, -4409, -4808, -5205, -5602, -5997,
-6392, -6786, -7179, -7571, -7961, -8351, -8739, -9126,
-9512, -9896, -10278, -10659, -11039, -11416, -11793, -12167,
-12539, -12910, -13278, -13645, -14010, -14372, -14732, -15090,
-15446, -15800, -16151, -16499, -16846, -17189, -17530, -17869,
-18204, -18537, -18868, -19195, -19519, -19841, -20159, -20475,
-20787, -21097, -21403, -21706, -22005, -22301, -22594, -22884,
-23170, -23453, -23732, -24007, -24279, -24547, -24812, -25073,
-25330, -25583, -25832, -26077, -26319, -26557, -26790, -27020,
-27245, -27466, -27684, -27897, -28106, -28310, -28511, -28707,
-28898, -29086, -29269, -29447, -29621, -29791, -29956, -30117,
-30273, -30425, -30572, -30714, -30852, -30985, -31114, -31237,
-31357, -31471, -31581, -31685, -31785, -31881, -31971, -32057,
-32138, -32214, -32285, -32351, -32413, -32469, -32521, -32568,
-32610, -32647, -32679, -32706, -32728, -32745, -32758, -32765,
-32767, -32765, -32758, -32745, -32728, -32706, -32679, -32647,
-32610, -32568, -32521, -32469, -32413, -32351, -32285, -32214,
-32138, -32057, -31971, -31881, -31785, -31685, -31581, -31471,
-31357, -31237, -31114, -30985, -30852, -30714, -30572, -30425,
-30273, -30117, -29956, -29791, -29621, -29447, -29269, -29086,
-28898, -28707, -28511, -28310, -28106, -27897, -27684, -27466,
-27245, -27020, -26790, -26557, -26319, -26077, -25832, -25583,
-25330, -25073, -24812, -24547, -24279, -24007, -23732, -23453,
-23170, -22884, -22594, -22301, -22005, -21706, -21403, -21097,
-20787, -20475, -20159, -19841, -19519, -19195, -18868, -18537,
-18204, -17869, -17530, -17189, -16846, -16499, -16151, -15800,
-15446, -15090, -14732, -14372, -14010, -13645, -13278, -12910,
-12539, -12167, -11793, -11416, -11039, -10659, -10278, -9896,
-9512, -9126, -8739, -8351, -7961, -7571, -7179, -6786,
-6392, -5997, -5602, -5205, -4808, -4409, -4011, -3611,
-3211, -2811, -2410, -2009, -1607, -1206, -804, -402
};
int16 C4CosTable[512] = {
32767, 32765, 32758, 32745, 32728, 32706, 32679, 32647,
32610, 32568, 32521, 32469, 32413, 32351, 32285, 32214,
32138, 32057, 31971, 31881, 31785, 31685, 31581, 31471,
31357, 31237, 31114, 30985, 30852, 30714, 30572, 30425,
30273, 30117, 29956, 29791, 29621, 29447, 29269, 29086,
28898, 28707, 28511, 28310, 28106, 27897, 27684, 27466,
27245, 27020, 26790, 26557, 26319, 26077, 25832, 25583,
25330, 25073, 24812, 24547, 24279, 24007, 23732, 23453,
23170, 22884, 22594, 22301, 22005, 21706, 21403, 21097,
20787, 20475, 20159, 19841, 19519, 19195, 18868, 18537,
18204, 17869, 17530, 17189, 16846, 16499, 16151, 15800,
15446, 15090, 14732, 14372, 14010, 13645, 13278, 12910,
12539, 12167, 11793, 11416, 11039, 10659, 10278, 9896,
9512, 9126, 8739, 8351, 7961, 7571, 7179, 6786,
6392, 5997, 5602, 5205, 4808, 4409, 4011, 3611,
3211, 2811, 2410, 2009, 1607, 1206, 804, 402,
0, -402, -804, -1206, -1607, -2009, -2410, -2811,
-3211, -3611, -4011, -4409, -4808, -5205, -5602, -5997,
-6392, -6786, -7179, -7571, -7961, -8351, -8739, -9126,
-9512, -9896, -10278, -10659, -11039, -11416, -11793, -12167,
-12539, -12910, -13278, -13645, -14010, -14372, -14732, -15090,
-15446, -15800, -16151, -16499, -16846, -17189, -17530, -17869,
-18204, -18537, -18868, -19195, -19519, -19841, -20159, -20475,
-20787, -21097, -21403, -21706, -22005, -22301, -22594, -22884,
-23170, -23453, -23732, -24007, -24279, -24547, -24812, -25073,
-25330, -25583, -25832, -26077, -26319, -26557, -26790, -27020,
-27245, -27466, -27684, -27897, -28106, -28310, -28511, -28707,
-28898, -29086, -29269, -29447, -29621, -29791, -29956, -30117,
-30273, -30425, -30572, -30714, -30852, -30985, -31114, -31237,
-31357, -31471, -31581, -31685, -31785, -31881, -31971, -32057,
-32138, -32214, -32285, -32351, -32413, -32469, -32521, -32568,
-32610, -32647, -32679, -32706, -32728, -32745, -32758, -32765,
-32767, -32765, -32758, -32745, -32728, -32706, -32679, -32647,
-32610, -32568, -32521, -32469, -32413, -32351, -32285, -32214,
-32138, -32057, -31971, -31881, -31785, -31685, -31581, -31471,
-31357, -31237, -31114, -30985, -30852, -30714, -30572, -30425,
-30273, -30117, -29956, -29791, -29621, -29447, -29269, -29086,
-28898, -28707, -28511, -28310, -28106, -27897, -27684, -27466,
-27245, -27020, -26790, -26557, -26319, -26077, -25832, -25583,
-25330, -25073, -24812, -24547, -24279, -24007, -23732, -23453,
-23170, -22884, -22594, -22301, -22005, -21706, -21403, -21097,
-20787, -20475, -20159, -19841, -19519, -19195, -18868, -18537,
-18204, -17869, -17530, -17189, -16846, -16499, -16151, -15800,
-15446, -15090, -14732, -14372, -14010, -13645, -13278, -12910,
-12539, -12167, -11793, -11416, -11039, -10659, -10278, -9896,
-9512, -9126, -8739, -8351, -7961, -7571, -7179, -6786,
-6392, -5997, -5602, -5205, -4808, -4409, -4011, -3611,
-3211, -2811, -2410, -2009, -1607, -1206, -804, -402,
0, 402, 804, 1206, 1607, 2009, 2410, 2811,
3211, 3611, 4011, 4409, 4808, 5205, 5602, 5997,
6392, 6786, 7179, 7571, 7961, 8351, 8739, 9126,
9512, 9896, 10278, 10659, 11039, 11416, 11793, 12167,
12539, 12910, 13278, 13645, 14010, 14372, 14732, 15090,
15446, 15800, 16151, 16499, 16846, 17189, 17530, 17869,
18204, 18537, 18868, 19195, 19519, 19841, 20159, 20475,
20787, 21097, 21403, 21706, 22005, 22301, 22594, 22884,
23170, 23453, 23732, 24007, 24279, 24547, 24812, 25073,
25330, 25583, 25832, 26077, 26319, 26557, 26790, 27020,
27245, 27466, 27684, 27897, 28106, 28310, 28511, 28707,
28898, 29086, 29269, 29447, 29621, 29791, 29956, 30117,
30273, 30425, 30572, 30714, 30852, 30985, 31114, 31237,
31357, 31471, 31581, 31685, 31785, 31881, 31971, 32057,
32138, 32214, 32285, 32351, 32413, 32469, 32521, 32568,
32610, 32647, 32679, 32706, 32728, 32745, 32758, 32765
};
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