MAME SVN History

199869 Revisions

r17404 Wednesday 22nd August, 2012 at 18:09:45 UTC by Angelo Salese
MT #03398, fixed SNES VRAM size

[src/mame/includes]	snes.h
[src/mame/video]	snes.c

trunk/src/mame/includes/snes.h
r17403	r17404
503	503	inline void snes_draw_tile( UINT8 planes, UINT8 layer, UINT32 tileaddr, INT16 x, UINT8 priority, UINT8 flip, UINT8 direct_colors, UINT16 pal, UINT8 hires );
504	504	inline UINT32 snes_get_tmap_addr( UINT8 layer, UINT8 tile_size, UINT32 base, UINT32 x, UINT32 y );
505	505	inline void snes_update_line( UINT16 curline, UINT8 layer, UINT8 priority_b, UINT8 priority_a, UINT8 color_depth, UINT8 hires, UINT8 offset_per_tile, UINT8 direct_colors );
	506	UINT32 snes_get_vram_address( void );
506	507	void snes_update_line_mode7( UINT16 curline, UINT8 layer, UINT8 priority_b, UINT8 priority_a );
507	508	void snes_update_obsel( void );
508	509	void snes_oam_list_build( void );

trunk/src/mame/video/snes.c
r17403	r17404
1873	1873	{
1874	1874	UINT32 rem = addr & state->m_vram_fgr_mask;
1875	1875	UINT32 faddr = (addr & ~state->m_vram_fgr_mask) + (rem >> state->m_vram_fgr_shift) + ((rem & (state->m_vram_fgr_count - 1)) << 3);
1876		return faddr;
	1876	return faddr << 1;
1877	1877	}
1878	1878
1879		return addr;
	1879	return addr << 1;
1880	1880	}
1881	1881
1882	1882	READ8_MEMBER( snes_state::snes_vram_read )
1883	1883	{
1884	1884	UINT8 res = 0;
1885		offset &= 0x1ffff;
	1885	offset &= 0xffff; // only 64KB are present on SNES
1886	1886
1887	1887	if (snes_ppu.screen_disabled)
1888	1888	res = m_snes_vram[offset];
r17403	r17404
1914	1914
1915	1915	WRITE8_MEMBER( snes_state::snes_vram_write )
1916	1916	{
1917		offset &= 0x1ffff;
	1917	offset &= 0xffff; // only 64KB are present on SNES, Robocop 3 relies on this
1918	1918
1919	1919	if (snes_ppu.screen_disabled)
1920	1920	m_snes_vram[offset] = data;
r17403	r17404
2149	2149	return snes_ppu.ppu1_open_bus;
2150	2150	case RVMDATAL: /* Read data from VRAM (low) */
2151	2151	{
2152		UINT32 addr = snes_get_vram_address(space->machine()) ~~<< 1~~;
	2152	UINT32 addr = snes_get_vram_address(space->machine());
2153	2153	snes_ppu.ppu1_open_bus = state->m_vram_read_buffer & 0xff;
2154	2154
2155	2155	if (!state->m_vram_fgr_high)
r17403	r17404
2164	2164	}
2165	2165	case RVMDATAH: /* Read data from VRAM (high) */
2166	2166	{
2167		UINT32 addr = snes_get_vram_address(space->machine()) ~~<< 1~~;
	2167	UINT32 addr = snes_get_vram_address(space->machine());
2168	2168	snes_ppu.ppu1_open_bus = (state->m_vram_read_buffer >> 8) & 0xff;
2169	2169
2170	2170	if (state->m_vram_fgr_high)
r17403	r17404
2399	2399	{
2400	2400	UINT32 addr;
2401	2401	state->m_vmadd = (state->m_vmadd & 0xff00) \| (data << 0);
2402		addr = snes_get_vram_address(space->machine()) ~~<< 1~~;
	2402	addr = snes_get_vram_address(space->machine());
2403	2403	state->m_vram_read_buffer = state->snes_vram_read(*space, addr);
2404	2404	state->m_vram_read_buffer \|= (state->snes_vram_read(*space, addr + 1) << 8);
2405	2405	}
r17403	r17404
2408	2408	{
2409	2409	UINT32 addr;
2410	2410	state->m_vmadd = (state->m_vmadd & 0x00ff) \| (data << 8);
2411		addr = snes_get_vram_address(space->machine()) ~~<< 1~~;
	2411	addr = snes_get_vram_address(space->machine());
2412	2412	state->m_vram_read_buffer = state->snes_vram_read(*space, addr);
2413	2413	state->m_vram_read_buffer \|= (state->snes_vram_read(*space, addr + 1) << 8);
2414	2414	}
2415	2415	break;
2416	2416	case VMDATAL: /* 2118: Data for VRAM write (low) */
2417	2417	{
2418		UINT32 addr = snes_get_vram_address(space->machine()) ~~<< 1~~;
	2418	UINT32 addr = snes_get_vram_address(space->machine());
2419	2419	state->snes_vram_write(*space, addr, data);
2420	2420
2421	2421	if (!state->m_vram_fgr_high)
r17403	r17404
2424	2424	return;
2425	2425	case VMDATAH: /* 2119: Data for VRAM write (high) */
2426	2426	{
2427		UINT32 addr = snes_get_vram_address(space->machine()) ~~<< 1~~;
	2427	UINT32 addr = snes_get_vram_address(space->machine());
2428	2428	state->snes_vram_write(*space, addr + 1, data);
2429	2429
2430	2430	if (state->m_vram_fgr_high)

199869 Revisions