i'm having some problems in getting tiles displayed, it could be yabause not supporting a few things but i'd also like to know what i'm doing wrong.
well, here's what the code below does: it displays a 256 color 16x16 made up of 8x8 tiles. i think the problem is telling the saturn where the tiles and map data is stored.
Code: | | | #include <color.h> #define NBG0_CEL_ADR (VDP2_VRAM_A0) #define NBG0_MAP_ADR (VDP2_VRAM_A0 + 0x1000) #define NBG0_COL_ADR (VDP2_COLRAM) int main(void) { int j = 0; clear_vdp(); TVMD = HRESO0 | VRESO0 | BDCLMD; BGON = N1ON; CHCTLA = N1CHCN0; RAMCTL = VRAMD | VRBMD; MPABN1 = N1MPA0 | N1MPB0; MPCDN1 = N1MPA0 | N1MPB0; back_screen((void *)BACK_CRAM,RGB(28,20,16)); vram(nbg0_gfx,(u8 *)NBG0_CEL_ADR,SIZE(nbg0_gfx)); pram(nbg0_pal,(u16 *)NBG0_COL_ADR,SIZE(nbg0_pal)); TVMD |= DISP; for(;;) { while((TVSTAT & 8) == 0); *(u16 *)(NBG0_MAP_ADR + j) = 0x0; *(u16 *)(NBG0_MAP_ADR + (j + 1)) = 0x2; j++; while((TVSTAT & 8) != 0); } return 0; } void clear_vdp(void) { int j; u16 *vdp2_io = (u16 *)(VDP2_VRAM_A0 + 0x180000); for(j = 0; j < 0xFF; j++) { vdp2_io[j] = 0x0; } } void back_screen(void *adr, u32 col) { u32 *vram_s = (u32 *)adr; BKTAU = (((*vram_s >> 17) & 0x7) | (col & 0x8000)); BKTAL = ((*vram_s >> 1) & 0xFFFF); *(u32 *)vram_s = (col & ~0x8000); } void vram(const u8 *dat, void *adr, u32 len) { int j; u8 *vram_s = (u8 *)adr; for(j = 0; j < len; j++) { *vram_s++ = *dat++; } } void pram(const u16 *dat, void *adr, u32 len) { int j; u16 *pram_s = (u16 *)adr; for(j = 0; j < len; j++) { *pram_s++ = *dat++; } } |
the macros below may be wrong (can't blame me, the names are difficult to remember) 
Code: | | | #ifndef __CORE_H__ #define __CORE_H__ #include <type.h> #define VDP2_VRAM_A0 0x25E00000 #define VDP2_VRAM_A1 0x25E20000 #define VDP2_VRAM_B0 0x25E40000 #define VDP2_VRAM_B1 0x25E60000 #define NBG0_MAP (CGN01_RAM + 0x16000) #define NBG1_MAP (CGN01_RAM + 0x18000) #define KTBL0_RAM VDP2_VRAM_A1 #define BACK_CRAM (KTBL0_RAM + 0x1FFFE) #define VDP2_COLRAM 0x25F00000 #define TVMD *(vu16 *)(VDP2_VRAM_A0 + 0x180000) #define EXTEN *(vu16 *)(VDP2_VRAM_A0 + 0x180002) #define TVSTAT *(vu16 *)(VDP2_VRAM_A0 + 0x180004) #define VRSIZE *(vu16 *)(VDP2_VRAM_A0 + 0x180006) #define RAMCTL *(vu16 *)(VDP2_VRAM_A0 + 0x18000E) #define BGON *(vu16 *)(VDP2_VRAM_A0 + 0x180020) #define CHCTLA *(vu16 *)(VDP2_VRAM_A0 + 0x180028) #define CHCTLB *(vu16 *)(VDP2_VRAM_A0 + 0x18002A) #define BKTAU *(vu32 *)(VDP2_VRAM_A0 + 0x1800AC) #define BKTAL *(vu32 *)(VDP2_VRAM_A0 + 0x1800AE) #define LCTAL *(vu16 *)(VDP2_VRAM_A0 + 0x1800AA) #define LCTAU *(vu16 *)(VDP2_VRAM_A0 + 0x1800AC) #define PNCN0 *(vu16 *)(VDP2_VRAM_A0 + 0x180030) #define PNCN1 *(vu16 *)(VDP2_VRAM_A0 + 0x180032) #define PNCN2 *(vu16 *)(VDP2_VRAM_A0 + 0x180034) #define PNCN3 *(vu16 *)(VDP2_VRAM_A0 + 0x180036) #define PLSZ *(vu16 *)(VDP2_VRAM_A0 + 0x18003A) #define MPABN0 *(vu16 *)(VDP2_VRAM_A0 + 0x180040) #define MPCDN0 *(vu16 *)(VDP2_VRAM_A0 + 0x180042) #define MPABN1 *(vu16 *)(VDP2_VRAM_A0 + 0x180044) #define MPCDN1 *(vu16 *)(VDP2_VRAM_A0 + 0x180046) #define DISP (1 << 15) #define BDCLMD (1 << 8) #define LSMD1 (1 << 7) #define LSMD0 (1 << 6) #define VRESO1 (1 << 5) #define VRESO0 (1 << 4) #define HRESO2 (1 << 2) #define HRESO1 (1 << 1) #define HRESO0 (1 << 0) #define EXLTEN (1 << 9) #define EXSYEN (1 << 8) #define DASEL (1 << 1) #define EXBGEN (1 << 0) #define EXLTFG (1 << 9) #define EXSYFG (1 << 8) #define VBLANK (1 << 3) #define HBLANK (1 << 2) #define ODD (1 << 1) #define PAL (1 << 0) #define VRAMSZ (1 << 15) #define R0TPON (1 << 12) #define N3TPON (1 << 11) #define N2TPON (1 << 10) #define N1TPON (1 << 9) #define N0TPON (1 << 8) #define R1ON (1 << 5) #define R0ON (1 << 4) #define N3ON (1 << 3) #define N2ON (1 << 2) #define N1ON (1 << 1) #define N0ON (1 << 0) #define N0CHCN0 (1 << 4) #define N0CHCN1 (1 << 5) #define N0CHCN2 (1 << 6) #define N0BMSZ0 (1 << 2) #define N0CHSZ (1 << 0) #define N1CHCN0 (1 << 12) #define N1CHCN1 (1 << 13) #define BKCLMD (1 << 15) #define N0PNB (1 << 15) #define N0CNSM (1 << 14) #define N1PNB (1 << 15) #define N1CNSM (1 << 14) #define N0BMEN (1 << 1) #define N1BMEN (1 << 9) #define VRBMD (1 << 9) #define VRAMD (1 << 9) #define N0MPB0 (1 << 8) #define N0MPA0 (1 << 0) #define N1MPA0 (1 << 8) #define N1MPB0 (1 << 0) #ifndef NULL #define NULL (void *)0 #endif #define RGB(r,g,b) ((r) | ((g) << 5) | ((b) << 10)) #define SIZE(size) (sizeof(size) / sizeof(size[0])) #endif |
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