machine/vsnes.cpp: Replaced MMC3 implementation with Namco 108. (#8991)
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0kmg
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@ -2858,7 +2858,7 @@ GAME( 1986, suprmrioa,suprmrio, vsnes, suprmrio, vsnes_state, init_vsno
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GAME( 1986, suprmriobl,suprmrio, vsnes_bootleg, suprmrio, vsnes_state, init_bootleg, ROT0, "bootleg", "Vs. Super Mario Bros. (bootleg with Z80, set 1)", 0) // timer starts at 200(!)
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GAME( 1986, suprmriobl2,suprmrio,vsnes_bootleg, suprmrio, vsnes_state, init_bootleg, ROT0, "bootleg", "Vs. Super Mario Bros. (bootleg with Z80, set 2)", 0) // timer starts at 300
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GAME( 1988, skatekds, suprmrio, vsnes, suprmrio, vsnes_state, init_vsnormal, ROT0, "hack (Two-Bit Score)", "Vs. Skate Kids. (Graphic hack of Super Mario Bros.)", 0 )
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GAME( 1985, vsskykid, 0, vsnes, vsskykid, vsnes_state, init_MMC3, ROT0, "Namco", "Vs. Super SkyKid", 0 )
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GAME( 1985, vsskykid, 0, vsnes, vsskykid, vsnes_state, init_vs108, ROT0, "Namco", "Vs. Super SkyKid", 0 )
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GAME( 1987, tkoboxng, 0, vsnes, tkoboxng, vsnes_state, init_tkoboxng, ROT0, "Namco / Data East USA", "Vs. T.K.O. Boxing", 0 )
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GAME( 1984, smgolf, 0, vsnes, golf4s, vsnes_state, init_vsnormal, ROT0, "Nintendo", "Vs. Stroke & Match Golf (Men Version, set GF4-2 F)", 0 )
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GAME( 1984, smgolfb, smgolf, vsnes, golf, vsnes_state, init_vsnormal, ROT0, "Nintendo", "Vs. Stroke & Match Golf (Men Version, set GF4-2 ?)", 0 )
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@ -36,7 +36,7 @@ public:
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void init_vsvram();
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void init_bnglngby();
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void init_drmario();
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void init_MMC3();
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void init_vs108();
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void init_vsfdf();
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void init_tkoboxng();
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void init_vsgun();
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@ -84,7 +84,7 @@ private:
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void vsgshoe_gun_in0_w(uint8_t data);
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void drmario_rom_banking(offs_t offset, uint8_t data);
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void vsvram_rom_banking(uint8_t data);
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void mapper4_w(offs_t offset, uint8_t data);
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void vs108_rom_banking(offs_t offset, uint8_t data);
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uint8_t rbi_hack_r(offs_t offset);
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uint8_t supxevs_read_prot_1_r();
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uint8_t supxevs_read_prot_2_r();
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@ -105,9 +105,6 @@ private:
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DECLARE_MACHINE_RESET(vsdual);
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DECLARE_MACHINE_START(bootleg);
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void v_set_videorom_bank( int start, int count, int vrom_start_bank );
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void mapper4_set_prg( );
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void mapper4_set_chr( );
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void mapper4_irq( int scanline, int vblank, int blanked );
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void bootleg_sound_write(offs_t offset, uint8_t data);
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uint8_t vsnes_bootleg_z80_data_r();
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@ -140,13 +137,8 @@ private:
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int m_size16k;
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int m_switchlow;
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int m_vrom4k;
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int m_MMC3_cmd;
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int m_MMC3_prg_bank[4];
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int m_MMC3_chr_bank[6];
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int m_MMC3_prg_mask;
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int m_IRQ_enable;
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int m_IRQ_count;
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int m_IRQ_count_latch;
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int m_108_reg;
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int m_108_prg_mask;
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int m_VSindex;
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int m_supxevs_prot_index;
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int m_security_counter;
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@ -676,151 +676,58 @@ void vsnes_state::init_vsvram()
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/**********************************************************************************/
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void vsnes_state::mapper4_set_prg( )
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void vsnes_state::vs108_rom_banking(offs_t offset, uint8_t data)
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{
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uint8_t *prg = memregion("maincpu")->base();
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uint8_t prg_flip = (m_MMC3_cmd & 0x40) ? 2 : 0;
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memcpy(&prg[0x8000], &prg[0x2000 * (m_MMC3_prg_bank[0 ^ prg_flip] & m_MMC3_prg_mask) + 0x10000], 0x2000);
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memcpy(&prg[0xa000], &prg[0x2000 * (m_MMC3_prg_bank[1] & m_MMC3_prg_mask) + 0x10000], 0x2000);
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memcpy(&prg[0xc000], &prg[0x2000 * (m_MMC3_prg_bank[2 ^ prg_flip] & m_MMC3_prg_mask) + 0x10000], 0x2000);
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memcpy(&prg[0xe000], &prg[0x2000 * (m_MMC3_prg_bank[3] & m_MMC3_prg_mask) + 0x10000], 0x2000);
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}
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void vsnes_state::mapper4_set_chr( )
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{
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uint8_t chr_page = (m_MMC3_cmd & 0x80) >> 5;
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v_set_videorom_bank(chr_page ^ 0, 1, m_MMC3_chr_bank[0] & ~0x01);
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v_set_videorom_bank(chr_page ^ 1, 1, m_MMC3_chr_bank[0] | 0x01);
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v_set_videorom_bank(chr_page ^ 2, 1, m_MMC3_chr_bank[1] & ~0x01);
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v_set_videorom_bank(chr_page ^ 3, 1, m_MMC3_chr_bank[1] | 0x01);
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v_set_videorom_bank(chr_page ^ 4, 1, m_MMC3_chr_bank[2]);
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v_set_videorom_bank(chr_page ^ 5, 1, m_MMC3_chr_bank[3]);
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v_set_videorom_bank(chr_page ^ 6, 1, m_MMC3_chr_bank[4]);
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v_set_videorom_bank(chr_page ^ 7, 1, m_MMC3_chr_bank[5]);
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}
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void vsnes_state::mapper4_irq( int scanline, int vblank, int blanked )
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{
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if (scanline < ppu2c0x_device::BOTTOM_VISIBLE_SCANLINE)
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{
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int priorCount = m_IRQ_count;
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if (m_IRQ_count == 0)
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{
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m_IRQ_count = m_IRQ_count_latch;
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}
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else
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m_IRQ_count--;
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if (m_IRQ_enable && !blanked && (m_IRQ_count == 0) && priorCount)
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{
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m_maincpu->set_input_line(0, HOLD_LINE);
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}
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}
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}
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void vsnes_state::mapper4_w(offs_t offset, uint8_t data)
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{
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uint8_t MMC3_helper, cmd;
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switch (offset & 0x6001)
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{
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case 0x0000: /* $8000 */
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MMC3_helper = m_MMC3_cmd ^ data;
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m_MMC3_cmd = data;
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/* Has PRG Mode changed? */
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if (MMC3_helper & 0x40)
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mapper4_set_prg();
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/* Has CHR Mode changed? */
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if (MMC3_helper & 0x80)
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mapper4_set_chr();
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case 0x0000: // $8000
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m_108_reg = data & 0x07;
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break;
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case 0x0001: /* $8001 */
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cmd = m_MMC3_cmd & 0x07;
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switch (cmd)
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case 0x0001: // $8001
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switch (m_108_reg)
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{
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case 0: case 1: // these do not need to be separated: we take care of them in set_chr!
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case 0: case 1:
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v_set_videorom_bank(m_108_reg * 2, 2, data);
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break;
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case 2: case 3: case 4: case 5:
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m_MMC3_chr_bank[cmd] = data;
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mapper4_set_chr();
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v_set_videorom_bank(m_108_reg + 2, 1, data);
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break;
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case 6:
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case 7:
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m_MMC3_prg_bank[cmd - 6] = data;
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mapper4_set_prg();
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case 6: case 7:
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{
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uint8_t *prg = memregion("maincpu")->base();
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int addr = m_108_reg == 6 ? 0x8000 : 0xa000;
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memcpy(&prg[addr], &prg[0x2000 * (data & m_108_prg_mask) + 0x10000], 0x2000);
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}
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break;
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}
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break;
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case 0x2000: /* $a000 */
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if (data & 0x40)
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v_set_mirroring(1, PPU_MIRROR_HIGH);
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else
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{
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if (data & 0x01)
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v_set_mirroring(1, PPU_MIRROR_HORZ);
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else
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v_set_mirroring(1, PPU_MIRROR_VERT);
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}
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break;
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case 0x2001: /* $a001 - extra RAM enable/disable */
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/* ignored - we always enable it */
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break;
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case 0x4000: /* $c000 - IRQ scanline counter */
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m_IRQ_count = data;
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break;
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case 0x4001: /* $c001 - IRQ scanline latch */
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m_IRQ_count_latch = data;
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break;
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case 0x6000: /* $e000 - Disable IRQs */
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m_IRQ_enable = 0;
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m_IRQ_count = m_IRQ_count_latch;
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m_ppu1->set_scanline_callback(nullptr);
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break;
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case 0x6001: /* $e001 - Enable IRQs */
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m_IRQ_enable = 1;
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m_ppu1->set_scanline_callback(*this, FUNC(vsnes_state::mapper4_irq));
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break;
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default:
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logerror("mapper4_w uncaught: %04x value: %02x\n", offset + 0x8000, data);
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logerror("vs108_rom_banking uncaught: %04x value: %02x\n", offset + 0x8000, data);
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break;
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}
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}
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/* Common init for MMC3 games */
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// Common init for (Namco) 108 games
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void vsnes_state::init_MMC3()
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void vsnes_state::init_vs108()
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{
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uint8_t *prg = memregion("maincpu")->base();
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m_IRQ_enable = m_IRQ_count = m_IRQ_count_latch = 0;
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int MMC3_prg_chunks = (memregion("maincpu")->bytes() - 0x10000) / 0x4000;
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int prg_chunks = (memregion("maincpu")->bytes() - 0x10000) / 0x4000;
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m_MMC3_prg_bank[0] = m_MMC3_prg_bank[2] = 0xfe;
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m_MMC3_prg_bank[1] = m_MMC3_prg_bank[3] = 0xff;
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m_MMC3_cmd = 0;
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m_108_reg = 0;
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m_108_prg_mask = (prg_chunks << 1) - 1;
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m_MMC3_prg_mask = ((MMC3_prg_chunks << 1) - 1);
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memcpy(&prg[0x8000], &prg[(prg_chunks - 1) * 0x4000 + 0x10000], 0x2000);
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memcpy(&prg[0xa000], &prg[(prg_chunks - 1) * 0x4000 + 0x12000], 0x2000);
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memcpy(&prg[0xc000], &prg[(prg_chunks - 1) * 0x4000 + 0x10000], 0x2000);
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memcpy(&prg[0xe000], &prg[(prg_chunks - 1) * 0x4000 + 0x12000], 0x2000);
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memcpy(&prg[0x8000], &prg[(MMC3_prg_chunks - 1) * 0x4000 + 0x10000], 0x2000);
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memcpy(&prg[0xa000], &prg[(MMC3_prg_chunks - 1) * 0x4000 + 0x12000], 0x2000);
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memcpy(&prg[0xc000], &prg[(MMC3_prg_chunks - 1) * 0x4000 + 0x10000], 0x2000);
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memcpy(&prg[0xe000], &prg[(MMC3_prg_chunks - 1) * 0x4000 + 0x12000], 0x2000);
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// 108 chip at $8000-$9fff
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m_maincpu->space(AS_PROGRAM).install_write_handler(0x8000, 0xffff, write8sm_delegate(*this, FUNC(vsnes_state::vs108_rom_banking)));
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/* MMC3 mapper at writes to $8000-$ffff */
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m_maincpu->space(AS_PROGRAM).install_write_handler(0x8000, 0xffff, write8sm_delegate(*this, FUNC(vsnes_state::mapper4_w)));
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/* extra ram at $6000-$7fff */
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// extra ram at $6000-$7fff
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m_extraram = std::make_unique<uint8_t[]>(0x2000);
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save_pointer(NAME(m_extraram.get()), 0x2000);
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m_maincpu->space(AS_PROGRAM).install_ram(0x6000, 0x7fff, m_extraram.get());
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@ -857,7 +764,7 @@ uint8_t vsnes_state::rbi_hack_r(offs_t offset)
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void vsnes_state::init_rbibb()
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{
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init_MMC3();
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init_vs108();
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/* RBI Base ball hack */
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m_maincpu->space(AS_PROGRAM).install_read_handler(0x5e00, 0x5e01, read8sm_delegate(*this, FUNC(vsnes_state::rbi_hack_r)));
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@ -904,7 +811,7 @@ uint8_t vsnes_state::supxevs_read_prot_4_r()
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void vsnes_state::init_supxevs()
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{
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init_MMC3();
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init_vs108();
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/* Vs. Super Xevious Protection */
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m_maincpu->space(AS_PROGRAM).install_read_handler(0x54ff, 0x54ff, read8smo_delegate(*this, FUNC(vsnes_state::supxevs_read_prot_1_r)));
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@ -938,7 +845,7 @@ uint8_t vsnes_state::tko_security_r(offs_t offset)
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void vsnes_state::init_tkoboxng()
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{
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init_MMC3();
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init_vs108();
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/* security device at $5e00-$5e01 */
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m_maincpu->space(AS_PROGRAM).install_read_handler(0x5e00, 0x5e01, read8sm_delegate(*this, FUNC(vsnes_state::tko_security_r)));
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@ -948,7 +855,7 @@ void vsnes_state::init_tkoboxng()
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void vsnes_state::init_vsfdf()
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{
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init_MMC3();
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init_vs108();
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m_maincpu->space(AS_PROGRAM).install_readwrite_handler(0x4016, 0x4016, read8smo_delegate(*this, FUNC(vsnes_state::gun_in0_r)), write8smo_delegate(*this, FUNC(vsnes_state::gun_in0_w)));
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