mirror of
https://github.com/RaySollium99/picodrive.git
synced 2025-09-05 15:27:46 -04:00
docs updated, gfx_cd works(?)
git-svn-id: file:///home/notaz/opt/svn/PicoDrive@74 be3aeb3a-fb24-0410-a615-afba39da0efa
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notaz
parent
a403080104
commit
01bc6b1993
7 changed files with 94 additions and 107 deletions
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@ -29,36 +29,6 @@ static const int Table_Rot_Time[] =
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};
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#if 1*0
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typedef struct
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{
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unsigned int Reg_58; // Stamp_Size
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unsigned int Reg_5A;
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unsigned int Reg_5C;
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unsigned int Reg_5E;
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unsigned int Reg_60;
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unsigned int Reg_62;
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unsigned int Reg_64; // V_Dot
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unsigned int Reg_66;
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unsigned int Stamp_Map_Adr;
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unsigned int Buffer_Adr;
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unsigned int Vector_Adr;
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unsigned int Function; // Jmp_Adr;
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unsigned int Float_Part;
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unsigned int Draw_Speed;
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unsigned int XS;
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unsigned int YS;
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/*unsigned*/ int DXS;
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/*unsigned*/ int DYS;
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unsigned int XD;
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unsigned int YD;
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unsigned int XD_Mul;
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unsigned int H_Dot;
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} Rot_Comp;
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#endif
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static void gfx_cd_start(void)
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{
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int upd_len;
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@ -126,8 +96,6 @@ static void gfx_do(void)
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rot_comp.DYS = rot_comp.DXS >> 16;
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rot_comp.DXS = (rot_comp.DXS << 16) >> 16; // sign extend
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rot_comp.Vector_Adr += 8;
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//if ((rot_comp.H_Dot & 0x1ff) == 0)
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// goto nothing_to_draw;
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// MAKE_IMAGE_LINE
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while (rot_comp.H_Dot)
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@ -136,12 +104,12 @@ static void gfx_do(void)
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{
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if (func & 4) // 16x16 screen
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{
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eax = (ecx >> (11+5)) & 0x7f;
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eax = (ecx >> (11+5)) & 0x007f;
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ebx = (edx >> (11-2)) & 0x3f80;
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}
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else // 1x1 screen
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{
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eax = (ecx >> (11+5)) & 0x0f;
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eax = (ecx >> (11+5)) & 0x07;
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ebx = (edx >> (11+2)) & 0x38;
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}
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}
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@ -149,7 +117,7 @@ static void gfx_do(void)
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{
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if (func & 4) // 16x16 screen
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{
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eax = (ecx >> (11+4)) & 0xff;
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eax = (ecx >> (11+4)) & 0x00ff;
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ebx = (edx >> (11-4)) & 0xff00;
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}
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else // 1x1 screen
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@ -160,7 +128,7 @@ static void gfx_do(void)
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}
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ebx += eax;
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esi = rot_comp.Stamp_Map_Adr;
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// esi = rot_comp.Stamp_Map_Adr;
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ptrs = (unsigned short *) (Pico_mcd->word_ram2M + rot_comp.Stamp_Map_Adr + ebx*2);
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edi = ptrs[0] | (ptrs[1] << 16);
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@ -191,131 +159,102 @@ static void gfx_do(void)
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ebx += esi;
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edi = (eax & 0x3800) ^ 0x1000; // bswap
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eax = ((eax >> 8) & 0x40) + ebx;
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pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
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if (!(edi & 0x800)) pixel >>= 4;
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break;
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case 0x01: // No_Flip_0, 32x32 dots
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ebx = (ebx >> 9) & 0x7c;
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ebx += esi;
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edi = (eax & 0x3800) ^ 0x1000; // bswap
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eax = ((eax >> 7) & 0x180) + ebx;
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pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
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if (!(edi & 0x800)) pixel >>= 4;
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break;
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case 0x02: // No_Flip_90, 16x16 dots
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eax = (eax >> 9) & 0x3c;
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eax += esi;
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edi = (ebx & 0x3800) ^ 0x2800; // bswap
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eax += ((ebx >> 8) & 0x40) ^ 0x40;
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pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
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if (!(edi & 0x800)) pixel >>= 4;
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break;
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case 0x03: // No_Flip_90, 32x32 dots
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eax = (eax >> 9) & 0x7c;
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eax += esi;
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edi = (ebx & 0x3800) ^ 0x2800; // bswap
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eax += (ebx >> 7) & 0x180;
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pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
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if (!(edi & 0x800)) pixel >>= 4;
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eax += ((ebx >> 7) & 0x180) ^ 0x180;
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break;
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case 0x04: // No_Flip_180, 16x16 dots
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ebx = ((ebx >> 9) & 0x3c) ^ 0x3c;
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ebx += esi;
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edi = (eax & 0x3800) ^ 0x2800; // bswap and flip
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eax = (((eax >> 8) & 0x40) ^ 0x40) + ebx;
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pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
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if (!(edi & 0x800)) pixel >>= 4;
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break;
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case 0x05: // No_Flip_180, 32x32 dots
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ebx = ((ebx >> 9) & 0x7c) ^ 0x7c;
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ebx += esi;
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edi = (eax & 0x3800) ^ 0x2800; // bswap and flip
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eax = (((eax >> 7) & 0x180) ^ 0x180) + ebx;
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pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
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if (!(edi & 0x800)) pixel >>= 4;
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break;
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case 0x06: // No_Flip_270, 16x16 dots
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eax = ((eax >> 9) & 0x3c) ^ 0x3c;
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eax += esi;
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edi = (ebx & 0x3800) ^ 0x1000; // bswap
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eax += (ebx >> 8) & 0x40;
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pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
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if (!(edi & 0x800)) pixel >>= 4;
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break;
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case 0x07: // No_Flip_270, 32x32 dots
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eax = ((eax >> 9) & 0x7c) ^ 0x7c;
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eax += esi;
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edi = (ebx & 0x3800) ^ 0x1000; // bswap
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eax += (ebx >> 7) & 0x180;
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pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
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if (!(edi & 0x800)) pixel >>= 4;
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break;
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case 0x08: // Flip_0, 16x16 dots
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ebx = ((ebx >> 9) & 0x3c) ^ 0x3c;
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ebx = (ebx >> 9) & 0x3c;
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ebx += esi;
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edi = (eax & 0x3800) ^ 0x2800; // bswap, flip
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eax = (((eax >> 8) & 0x40) ^ 0x40) + ebx;
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pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
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if (!(edi & 0x800)) pixel >>= 4;
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break;
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case 0x09: // Flip_0, 32x32 dots
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ebx = ((ebx >> 9) & 0x7c) ^ 0x7c;
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ebx = (ebx >> 9) & 0x7c;
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ebx += esi;
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edi = (eax & 0x3800) ^ 0x2800; // bswap, flip
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eax = (((eax >> 7) & 0x180) ^ 0x180) + ebx;
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pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
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if (!(edi & 0x800)) pixel >>= 4;
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break;
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case 0x0a: // Flip_90, 16x16 dots
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eax = ((eax >> 9) & 0x3c) ^ 0x3c;
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eax += esi;
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edi = (ebx & 0x3800) ^ 0x2800; // bswap, flip
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eax += ((ebx >> 8) & 0x40) ^ 0x40;
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pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
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if (!(edi & 0x800)) pixel >>= 4;
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break;
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case 0x0b: // Flip_90, 32x32 dots
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eax = ((eax >> 9) & 0x7c) ^ 0x7c;
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eax += esi;
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edi = (ebx & 0x3800) ^ 0x2800; // bswap, flip
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eax += ((ebx >> 7) & 0x180) ^ 0x180;
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pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
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if (!(edi & 0x800)) pixel >>= 4;
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break;
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case 0x0c: // Flip_180, 16x16 dots
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ebx = ((ebx >> 9) & 0x3c) ^ 0x3c;
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ebx += esi;
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edi = (eax & 0x3800) ^ 0x1000; // bswap
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eax = ((eax >> 8) & 0x40) + ebx;
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pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
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if (!(edi & 0x800)) pixel >>= 4;
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break;
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case 0x0d: // Flip_180, 32x32 dots
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ebx = ((ebx >> 9) & 0x7c) ^ 0x7c;
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ebx += esi;
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edi = (eax & 0x3800) ^ 0x1000; // bswap
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eax = ((eax >> 7) & 0x180) + ebx;
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pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
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if (!(edi & 0x800)) pixel >>= 4;
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break;
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case 0x0e: // Flip_270, 16x16 dots
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eax = (eax >> 9) & 0x3c;
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eax += esi;
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edi = (ebx & 0x3800) ^ 0x1000; // bswap, flip
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eax += (ebx >> 8) & 0x40;
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pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
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if (!(edi & 0x800)) pixel >>= 4;
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break;
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case 0x0f: // Flip_270, 32x32 dots
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eax = (eax >> 9) & 0x7c;
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eax += esi;
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edi = (ebx & 0x3800) ^ 0x1000; // bswap, flip
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eax += (ebx >> 7) & 0x180;
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pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
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if (!(edi & 0x800)) pixel >>= 4;
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break;
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}
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pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
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if (!(edi & 0x800)) pixel >>= 4;
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Pixel_Out:
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// pixel = 0;
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//Finish:
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