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// license:BSD-3-Clause
// copyright-holders:Fabio Priuli
/***********************************************************************************************************
NES/Famicom cartridge emulation for TXC PCBs
Here we emulate the following PCBs
* TXC 01-22000-400 [mapper 36]
* TXC 22111 [mapper 132]
* TXC Du Ma Racing [mapper 172]
* TXC Mahjong Block [mapper 172]
* TXC Commandos (and many more) [mapper 241]
TODO:
- Does Commandos indeed use this board?
***********************************************************************************************************/
#include "emu.h"
#include "txc.h"
#ifdef NES_PCB_DEBUG
#define VERBOSE 1
#else
#define VERBOSE 0
#endif
#define LOG_MMC(x) do { if (VERBOSE) logerror x; } while (0)
//-------------------------------------------------
// constructor
//-------------------------------------------------
DEFINE_DEVICE_TYPE(NES_TXC_22211, nes_txc_22211_device, "nes_txc_22211", "NES Cart TXC 22211 PCB")
DEFINE_DEVICE_TYPE(NES_TXC_DUMARACING, nes_txc_dumarc_device, "nes_txc_dumarc", "NES Cart TXC Du Ma Racing PCB")
DEFINE_DEVICE_TYPE(NES_TXC_MJBLOCK, nes_txc_mjblock_device, "nes_txc_mjblock", "NES Cart TXC Mahjong Block PCB")
DEFINE_DEVICE_TYPE(NES_TXC_STRIKEW, nes_txc_strikew_device, "nes_txc_strikew", "NES Cart TXC 01-22000-400 PCB")
DEFINE_DEVICE_TYPE(NES_TXC_COMMANDOS, nes_txc_commandos_device, "nes_txc_comm", "NES Cart TXC Cart Commandos PCB") // and others
nes_txc_22211_device::nes_txc_22211_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, const XTAL &clock)
: nes_nrom_device(mconfig, type, tag, owner, clock)
{
}
nes_txc_22211_device::nes_txc_22211_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock)
: nes_nrom_device(mconfig, NES_TXC_22211, tag, owner, clock)
{
}
nes_txc_dumarc_device::nes_txc_dumarc_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock)
: nes_txc_22211_device(mconfig, NES_TXC_DUMARACING, tag, owner, clock)
{
}
nes_txc_mjblock_device::nes_txc_mjblock_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock)
: nes_txc_22211_device(mconfig, NES_TXC_MJBLOCK, tag, owner, clock)
{
}
nes_txc_strikew_device::nes_txc_strikew_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock)
: nes_nrom_device(mconfig, NES_TXC_STRIKEW, tag, owner, clock)
{
}
nes_txc_commandos_device::nes_txc_commandos_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock)
: nes_nrom_device(mconfig, NES_TXC_COMMANDOS, tag, owner, clock)
{
}
void nes_txc_22211_device::device_start()
{
common_start();
save_item(NAME(m_reg));
}
void nes_txc_22211_device::pcb_reset()
{
prg32(0);
chr8(0, m_chr_source);
m_reg[0] = m_reg[1] = m_reg[2] = m_reg[3] = 0;
}
void nes_txc_strikew_device::device_start()
{
common_start();
save_item(NAME(m_reg));
}
void nes_txc_strikew_device::pcb_reset()
{
prg32(0);
chr8(0, m_chr_source);
m_reg[0] = m_reg[1] = m_reg[2] = m_reg[3] = 0;
}
/*-------------------------------------------------
mapper specific handlers
-------------------------------------------------*/
/*-------------------------------------------------
Bootleg Board 22211 by TXC (Type A)
Games: Creatom
Info from NEStopia: this mapper features write to four
registers (0x4100-0x4103). The third one is used to select
PRG and CHR banks.
iNES: mapper 132
In MESS: Supported.
-------------------------------------------------*/
void nes_txc_22211_device::write_l(offs_t offset, uint8_t data)
{
LOG_MMC(("TXC 22111 write_l, offset: %04x, data: %02x\n", offset, data));
if (offset < 4)
m_reg[offset & 0x03] = data;
}
uint8_t nes_txc_22211_device::read_l(offs_t offset)
{
LOG_MMC(("TXC 22111 read_l, offset: %04x\n", offset));
if (offset == 0x0000)
return (m_reg[1] ^ m_reg[2]) | 0x40;
else
return 0x00;
}
void nes_txc_22211_device::write_h(offs_t offset, uint8_t data)
{
LOG_MMC(("TXC 22111 write_h, offset: %04x, data: %02x\n", offset, data));
prg32(m_reg[2] >> 2);
chr8(m_reg[2], CHRROM);
}
/*-------------------------------------------------
Bootleg Board 22211 by TXC (Type B)
Games: 1991 Du Ma Racing
This mapper is basically the same as Type A. Only difference is
in the way CHR banks are selected (see below)
iNES: mapper 172
In MESS: Supported.
-------------------------------------------------*/
void nes_txc_dumarc_device::write_h(offs_t offset, uint8_t data)
{
LOG_MMC(("TXC Du Ma Racing write_h, offset: %04x, data: %02x\n", offset, data));
prg32(m_reg[2] >> 2);
chr8(bitswap<2>(data ^ m_reg[2], 4, 5), CHRROM);
}
/*-------------------------------------------------
Bootleg Board 22211 by TXC (Type C)
Games: Mahjong Block, Xiao Ma Li
This mapper is basically the same as 132 too. Only difference is
in 0x4100 reads which expect also bit 0 to be set
iNES: mapper 172
In MESS: Supported.
-------------------------------------------------*/
uint8_t nes_txc_mjblock_device::read_l(offs_t offset)
{
LOG_MMC(("TXC mjblock read_l, offset: %04x\n", offset));
if (offset == 0x0000)
return (m_reg[1] ^ m_reg[2]) | 0x41;
else
return 0x00;
}
/*-------------------------------------------------
TXC 01-22000-400 Board
Games: F-15 City War, Policeman, Puzzle, Strike Wolf,
Venice Beach Volley
iNES: mapper 36
In MAME: Supported.
-------------------------------------------------*/
u8 nes_txc_strikew_device::read_l(offs_t offset)
{
LOG_MMC(("TXC 01-22000-400 read_l, offset: %04x\n", offset));
offset += 0x100;
if (offset & 0x100)
return (get_open_bus() & 0xcf) | m_reg[0] << 4;
return get_open_bus();
}
void nes_txc_strikew_device::write_l(offs_t offset, u8 data)
{
LOG_MMC(("TXC 01-22000-400 write_l, offset: %04x, data: %02x\n", offset, data));
offset += 0x100;
switch (offset & 0x103)
{
case 0x100:
if (m_reg[3] & 1)
m_reg[0] = (m_reg[0] + 1) & 0x03;
else if (m_reg[1] & 1)
m_reg[0] = m_reg[2] ^ 0x03;
else
m_reg[0] = m_reg[2];
break;
case 0x101:
case 0x102:
case 0x103:
m_reg[offset & 0x03] = BIT(data, 4, 2);
break;
}
if (offset & 0x200)
chr8(data, CHRROM);
}
void nes_txc_strikew_device::write_h(offs_t offset, u8 data)
{
LOG_MMC(("TXC 01-22000-400 write_h, offset: %04x, data: %02x\n", offset, data));
prg32(m_reg[0]);
}
/*-------------------------------------------------
Bootleg Board MXMDHTWO by TXC
Games: Commandos, Journey to the West, Ma Bu Mi Zhen &
Qu Wei Cheng Yu Wu, Si Lu Chuan Qi
Simple Mapper: writes to 0x8000-0xffff sets the prg32 bank.
Not sure if returning 0x50 for reads in 0x4100-0x5000 is correct.
iNES: mapper 241
In MESS: Supported.
-------------------------------------------------*/
uint8_t nes_txc_commandos_device::read_l(offs_t offset)
{
return 0x50;
}
void nes_txc_commandos_device::write_h(offs_t offset, uint8_t data)
{
LOG_MMC(("TXC Commandos write_h, offset: %04x, data: %02x\n", offset, data));
prg32(data);
}
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