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-rw-r--r--GPU2D.cpp726
1 files changed, 33 insertions, 693 deletions
diff --git a/GPU2D.cpp b/GPU2D.cpp
index 4c6962d..f6da8d0 100644
--- a/GPU2D.cpp
+++ b/GPU2D.cpp
@@ -17,742 +17,82 @@
*/
#include <stdio.h>
-#include <string.h>
#include "NDS.h"
+#include "GPU.h"
#include "GPU2D.h"
-namespace GPU2D
+GPU2D::GPU2D(u32 num)
{
-
-#define LINE_CYCLES (355*6 * 2)
-#define FRAME_CYCLES (LINE_CYCLES * 263)
-
-u16 VCount;
-
-u16 DispStat[2], VMatch[2];
-
-u8 Palette[2*1024];
-u8 OAM[2*1024];
-
-u8 VRAM_A[128*1024];
-u8 VRAM_B[128*1024];
-u8 VRAM_C[128*1024];
-u8 VRAM_D[128*1024];
-u8 VRAM_E[ 64*1024];
-u8 VRAM_F[ 16*1024];
-u8 VRAM_G[ 16*1024];
-u8 VRAM_H[ 32*1024];
-u8 VRAM_I[ 16*1024];
-u8* VRAM[9] = {VRAM_A, VRAM_B, VRAM_C, VRAM_D, VRAM_E, VRAM_F, VRAM_G, VRAM_H, VRAM_I};
-
-u8 VRAMCNT[9];
-u8 VRAMSTAT;
-
-u8* VRAM_ABG[128];
-u8* VRAM_AOBJ[128];
-u8* VRAM_BBG[128];
-u8* VRAM_BOBJ[128];
-u8* VRAM_LCD[128];
-u8* VRAM_ARM7[2];
-
-u16 Framebuffer[256*192*2];
-
-
-void Reset()
-{
- VCount = 0;
-
- DispStat[0] = 0;
- DispStat[1] = 0;
- VMatch[0] = 0;
- VMatch[1] = 0;
-
- memset(Palette, 0, 2*1024);
- memset(OAM, 0, 2*1024);
-
- memset(VRAM_A, 0, 128*1024);
- memset(VRAM_B, 0, 128*1024);
- memset(VRAM_C, 0, 128*1024);
- memset(VRAM_D, 0, 128*1024);
- memset(VRAM_E, 0, 64*1024);
- memset(VRAM_F, 0, 16*1024);
- memset(VRAM_G, 0, 16*1024);
- memset(VRAM_H, 0, 32*1024);
- memset(VRAM_I, 0, 16*1024);
-
- memset(VRAMCNT, 0, 9);
- VRAMSTAT = 0;
-
- memset(VRAM_ABG, 0, sizeof(u8*)*128);
- memset(VRAM_AOBJ, 0, sizeof(u8*)*128);
- memset(VRAM_BBG, 0, sizeof(u8*)*128);
- memset(VRAM_BOBJ, 0, sizeof(u8*)*128);
- memset(VRAM_LCD, 0, sizeof(u8*)*128);
- memset(VRAM_ARM7, 0, sizeof(u8*)*2);
-
- for (int i = 0; i < 256*192*2; i++)
- {
- Framebuffer[i] = (i>=256*192)?0x03E0:0x7C00;
- }
+ Num = num;
}
-
-// VRAM mapping shit.
-// TODO eventually: work out priority orders in case of overlaps. there _are_ games that map overlapping banks.
-
-void MapVRAM_AB(u32 bank, u8 cnt)
+GPU2D::~GPU2D()
{
- u8 oldcnt = VRAMCNT[bank];
- VRAMCNT[bank] = cnt;
-
- if (oldcnt == cnt) return;
-
- u8 oldofs = (oldcnt >> 3) & 0x3;
- u8 ofs = (cnt >> 3) & 0x3;
-
- u8* vram = VRAM[bank];
-
- if (oldcnt & (1<<7))
- {
- u8** vrammap = NULL;
-
- switch (oldcnt & 0x3)
- {
- case 0:
- vrammap = &VRAM_LCD[bank<<3];
- break;
-
- case 1:
- vrammap = &VRAM_ABG[oldofs<<3];
- break;
-
- case 2:
- oldofs &= 0x1;
- vrammap = &VRAM_AOBJ[oldofs<<3];
- break;
-
- case 3:
- // not mapped to memory
- break;
- }
-
- if (vrammap)
- {
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap = NULL;
- }
- }
-
- if (cnt & (1<<7))
- {
- u8** vrammap = NULL;
-
- switch (cnt & 0x3)
- {
- case 0:
- vrammap = &VRAM_LCD[bank<<3];
- break;
-
- case 1:
- vrammap = &VRAM_ABG[ofs<<3];
- break;
-
- case 2:
- ofs &= 0x1;
- vrammap = &VRAM_AOBJ[ofs<<3];
- break;
-
- case 3:
- // not mapped to memory
- break;
- }
-
- if (vrammap)
- {
- *vrammap++ = vram; vram += 0x4000;
- *vrammap++ = vram; vram += 0x4000;
- *vrammap++ = vram; vram += 0x4000;
- *vrammap++ = vram; vram += 0x4000;
- *vrammap++ = vram; vram += 0x4000;
- *vrammap++ = vram; vram += 0x4000;
- *vrammap++ = vram; vram += 0x4000;
- *vrammap = vram;
- }
- }
}
-void MapVRAM_CD(u32 bank, u8 cnt)
+void GPU2D::Reset()
{
- u8 oldcnt = VRAMCNT[bank];
- VRAMCNT[bank] = cnt;
-
- VRAMSTAT &= ~(1 << (bank-2));
-
- if (oldcnt == cnt) return;
-
- u8 oldofs = (oldcnt >> 3) & 0x7;
- u8 ofs = (cnt >> 3) & 0x7;
-
- u8* vram = VRAM[bank];
-
- if (oldcnt & (1<<7))
- {
- u8** vrammap = NULL;
-
- switch (oldcnt & 0x7)
- {
- case 0:
- vrammap = &VRAM_LCD[bank<<3];
- break;
-
- case 1:
- vrammap = &VRAM_ABG[oldofs<<3];
- break;
-
- case 2:
- oldofs &= 0x1;
- VRAM_ARM7[oldofs] = NULL;
- break;
-
- case 3:
- // not mapped to memory
- break;
-
- case 4:
- if (bank == 2)
- vrammap = &VRAM_BBG[0];
- else
- vrammap = &VRAM_BOBJ[0];
- break;
- }
-
- if (vrammap)
- {
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap = NULL;
- }
- }
-
- if (cnt & (1<<7))
- {
- u8** vrammap = NULL;
-
- switch (cnt & 0x7)
- {
- case 0:
- vrammap = &VRAM_LCD[bank<<3];
- break;
-
- case 1:
- vrammap = &VRAM_ABG[ofs<<3];
- break;
-
- case 2:
- ofs &= 0x1;
- VRAM_ARM7[ofs] = vram;
- VRAMSTAT |= (1 << (bank-2));
- break;
-
- case 3:
- // not mapped to memory
- break;
-
- case 4:
- if (bank == 2)
- vrammap = &VRAM_BBG[0];
- else
- vrammap = &VRAM_BOBJ[0];
- break;
- }
-
- if (vrammap)
- {
- *vrammap++ = vram; vram += 0x4000;
- *vrammap++ = vram; vram += 0x4000;
- *vrammap++ = vram; vram += 0x4000;
- *vrammap++ = vram; vram += 0x4000;
- *vrammap++ = vram; vram += 0x4000;
- *vrammap++ = vram; vram += 0x4000;
- *vrammap++ = vram; vram += 0x4000;
- *vrammap = vram;
- }
- }
+ //
}
-void MapVRAM_E(u32 bank, u8 cnt)
+void GPU2D::SetFramebuffer(u16* buf)
{
- u8 oldcnt = VRAMCNT[bank];
- VRAMCNT[bank] = cnt;
-
- if (oldcnt == cnt) return;
-
- u8 oldofs = (oldcnt >> 3) & 0x7;
- u8 ofs = (cnt >> 3) & 0x7;
-
- u8* vram = VRAM[bank];
-
- if (oldcnt & (1<<7))
- {
- u8** vrammap = NULL;
-
- switch (oldcnt & 0x7)
- {
- case 0:
- VRAM_LCD[0x20] = NULL;
- VRAM_LCD[0x21] = NULL;
- VRAM_LCD[0x22] = NULL;
- VRAM_LCD[0x23] = NULL;
- break;
-
- case 1:
- vrammap = &VRAM_ABG[0];
- break;
-
- case 2:
- vrammap = &VRAM_AOBJ[0];
- break;
-
- case 3:
- // not mapped to memory
- break;
-
- case 4:
- // BG EXTPAL -- TODO
- break;
-
- case 5:
- // OBJ EXTPAL -- TODO
- break;
- }
-
- if (vrammap)
- {
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap = NULL;
- }
- }
-
- if (cnt & (1<<7))
- {
- u8** vrammap = NULL;
-
- switch (cnt & 0x7)
- {
- case 0:
- VRAM_LCD[0x20] = &vram[0x0000];
- VRAM_LCD[0x21] = &vram[0x4000];
- VRAM_LCD[0x22] = &vram[0x8000];
- VRAM_LCD[0x23] = &vram[0xC000];
- break;
-
- case 1:
- vrammap = &VRAM_ABG[0];
- break;
-
- case 2:
- vrammap = &VRAM_AOBJ[0];
- break;
-
- case 3:
- // not mapped to memory
- break;
-
- case 4:
- // BG EXTPAL -- TODO
- break;
+ // framebuffer is 256x192 16bit.
+ // might eventually support other framebuffer types/sizes
+ Framebuffer = buf;
+}
- case 5:
- // OBJ EXTPAL -- TODO
- break;
- }
- if (vrammap)
- {
- *vrammap++ = &vram[0x0000];
- *vrammap++ = &vram[0x4000];
- *vrammap++ = &vram[0x8000];
- *vrammap++ = &vram[0xC000];
- *vrammap++ = &vram[0x0000];
- *vrammap++ = &vram[0x4000];
- *vrammap++ = &vram[0x8000];
- *vrammap = &vram[0xC000];
- }
- }
+u8 GPU2D::Read8(u32 addr)
+{
+ printf("!! GPU2D READ8 %08X\n", addr);
}
-void MapVRAM_FG(u32 bank, u8 cnt)
+u16 GPU2D::Read16(u32 addr)
{
- u8 oldcnt = VRAMCNT[bank];
- VRAMCNT[bank] = cnt;
-
- if (oldcnt == cnt) return;
-
- u8 oldofs = (oldcnt >> 3) & 0x7;
- u8 ofs = (cnt >> 3) & 0x7;
-
- u8* vram = VRAM[bank];
- bank -= 5;
-
- if (oldcnt & (1<<7))
+ switch (addr & 0x00000FFF)
{
- u8** vrammap = NULL;
-
- switch (oldcnt & 0x7)
- {
- case 0:
- VRAM_LCD[0x24 + bank] = NULL;
- break;
-
- case 1:
- vrammap = &VRAM_ABG[(oldofs & 0x1) | ((oldofs & 0x2) << 1)];
- break;
-
- case 2:
- vrammap = &VRAM_AOBJ[(oldofs & 0x1) | ((oldofs & 0x2) << 1)];
- break;
-
- case 3:
- // not mapped to memory
- break;
-
- case 4:
- // BG EXTPAL TODO
- break;
-
- case 5:
- // OBJ EXTPAL TODO
- break;
- }
-
- if (vrammap)
- {
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap = NULL;
- }
- }
-
- if (cnt & (1<<7))
- {
- u8** vrammap = NULL;
-
- switch (cnt & 0x7)
- {
- case 0:
- VRAM_LCD[0x24 + bank] = vram;
- break;
-
- case 1:
- vrammap = &VRAM_ABG[(ofs & 0x1) | ((ofs & 0x2) << 1)];
- break;
-
- case 2:
- vrammap = &VRAM_AOBJ[(ofs & 0x1) | ((ofs & 0x2) << 1)];
- break;
-
- case 3:
- // not mapped to memory
- break;
-
- case 4:
- // BG EXTPAL TODO
- break;
-
- case 5:
- // OBJ EXTPAL TODO
- break;
- }
-
- if (vrammap)
- {
- *vrammap++ = vram;
- *vrammap++ = vram;
- *vrammap++ = vram;
- *vrammap++ = vram;
- *vrammap++ = vram;
- *vrammap++ = vram;
- *vrammap++ = vram;
- *vrammap = vram;
- }
+ //
}
}
-void MapVRAM_H(u32 bank, u8 cnt)
+u32 GPU2D::Read32(u32 addr)
{
- u8 oldcnt = VRAMCNT[bank];
- VRAMCNT[bank] = cnt;
-
- if (oldcnt == cnt) return;
-
- u8 oldofs = (oldcnt >> 3) & 0x7;
- u8 ofs = (cnt >> 3) & 0x7;
-
- u8* vram = VRAM[bank];
-
- if (oldcnt & (1<<7))
+ switch (addr & 0x00000FFF)
{
- u8** vrammap = NULL;
-
- switch (oldcnt & 0x3)
- {
- case 0:
- VRAM_LCD[0x26] = NULL;
- VRAM_LCD[0x27] = NULL;
- break;
-
- case 1:
- vrammap = &VRAM_BBG[0x00];
- break;
-
- case 2:
- // BG EXTPAL TODO
- break;
- }
-
- if (vrammap)
- {
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap = NULL;
- }
+ //
}
- if (cnt & (1<<7))
- {
- u8** vrammap = NULL;
-
- switch (cnt & 0x3)
- {
- case 0:
- VRAM_LCD[0x26] = &vram[0x0000];
- VRAM_LCD[0x27] = &vram[0x4000];
- break;
-
- case 1:
- vrammap = &VRAM_BBG[0x00];
- break;
-
- case 2:
- // BG EXTPAL TODO
- break;
- }
-
- if (vrammap)
- {
- *vrammap++ = &vram[0x0000];
- *vrammap++ = &vram[0x4000];
- *vrammap++ = &vram[0x0000];
- *vrammap++ = &vram[0x4000];
- *vrammap++ = &vram[0x0000];
- *vrammap++ = &vram[0x4000];
- *vrammap++ = &vram[0x0000];
- *vrammap = &vram[0x4000];
- }
- }
+ return Read16(addr) | (Read16(addr+2) << 16);
}
-void MapVRAM_I(u32 bank, u8 cnt)
+void GPU2D::Write8(u32 addr, u8 val)
{
- u8 oldcnt = VRAMCNT[bank];
- VRAMCNT[bank] = cnt;
-
- if (oldcnt == cnt) return;
-
- u8 oldofs = (oldcnt >> 3) & 0x7;
- u8 ofs = (cnt >> 3) & 0x7;
-
- u8* vram = VRAM[bank];
- bank -= 5;
-
- if (oldcnt & (1<<7))
- {
- u8** vrammap = NULL;
-
- switch (oldcnt & 0x3)
- {
- case 0:
- VRAM_LCD[0x28] = NULL;
- break;
-
- case 1:
- vrammap = &VRAM_BBG[0x02];
- break;
-
- case 2:
- vrammap = &VRAM_BOBJ[0x00];
- break;
-
- case 3:
- // not mapped to memory
- break;
- }
-
- if (vrammap)
- {
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap++ = NULL;
- *vrammap = NULL;
- }
- }
-
- if (cnt & (1<<7))
- {
- u8** vrammap = NULL;
-
- switch (cnt & 0x3)
- {
- case 0:
- VRAM_LCD[0x28] = vram;
- break;
-
- case 1:
- vrammap = &VRAM_BBG[0x02];
- break;
-
- case 2:
- vrammap = &VRAM_BOBJ[0x00];
- break;
-
- case 3:
- // not mapped to memory
- break;
- }
-
- if (vrammap)
- {
- *vrammap++ = vram;
- *vrammap++ = vram;
- *vrammap++ = vram;
- *vrammap++ = vram;
- *vrammap++ = vram;
- *vrammap++ = vram;
- *vrammap++ = vram;
- *vrammap = vram;
- }
- }
+ printf("!! GPU2D WRITE8 %08X %02X\n", addr, val);
}
-
-void DrawScanline(u32 screen, u32 line)
+void GPU2D::Write16(u32 addr, u16 val)
{
- u16* dst = &Framebuffer[256 * ((192*screen) + line)];
-
- if (screen==0)
- {
- u16* src = &((u16*)VRAM_A)[256*line];
- for (int i = 0; i < 256; i++)
- dst[i] = src[i];
- }
- else
+ switch (addr & 0x00000FFF)
{
- for (int i = 0; i < 256; i++)
- dst[i] = 0x7FFF;
+ //
}
}
-
-void StartFrame()
-{
- StartScanline(0);
-}
-
-void StartScanline(u32 line)
+void GPU2D::Write32(u32 addr, u32 val)
{
- VCount = line;
-
- if (line == VMatch[0])
- {
- DispStat[0] |= (1<<2);
-
- if (DispStat[0] & (1<<5)) NDS::TriggerIRQ(0, NDS::IRQ_VCount);
- }
- else
- DispStat[0] &= ~(1<<2);
-
- if (line == VMatch[1])
- {
- DispStat[1] |= (1<<2);
-
- if (DispStat[1] & (1<<5)) NDS::TriggerIRQ(1, NDS::IRQ_VCount);
- }
- else
- DispStat[1] &= ~(1<<2);
-
- if (line < 192)
- {
- // draw
- DrawScanline(0, line);
- DrawScanline(1, line);
-
- NDS::ScheduleEvent(LINE_CYCLES, StartScanline, line+1);
- }
- else if (line == 262)
+ switch (addr & 0x00000FFF)
{
- // frame end
-
- DispStat[0] &= ~(1<<0);
- DispStat[1] &= ~(1<<0);
+ //
}
- else
- {
- if (line == 192)
- {
- // VBlank
- DispStat[0] |= (1<<0);
- DispStat[1] |= (1<<0);
-
- if (DispStat[0] & (1<<3)) NDS::TriggerIRQ(0, NDS::IRQ_VBlank);
- if (DispStat[1] & (1<<3)) NDS::TriggerIRQ(1, NDS::IRQ_VBlank);
- }
- NDS::ScheduleEvent(LINE_CYCLES, StartScanline, line+1);
- }
+ Write16(addr, val&0xFFFF);
+ Write16(addr+2, val>>16);
}
-void SetDispStat(u32 cpu, u16 val)
+void GPU2D::DrawScanline(u32 line)
{
- val &= 0xFFB8;
- DispStat[cpu] &= 0x0047;
- DispStat[cpu] |= val;
-
- VMatch[cpu] = (val >> 8) | ((val & 0x80) << 1);
-
- if (val & 0x10) printf("!! HBLANK ENABLED\n");
-}
-
+ //
}