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Diffstat (limited to 'src/mame/machine/model1io2.cpp')
-rw-r--r-- | src/mame/machine/model1io2.cpp | 349 |
1 files changed, 349 insertions, 0 deletions
diff --git a/src/mame/machine/model1io2.cpp b/src/mame/machine/model1io2.cpp new file mode 100644 index 00000000000..dd606859f95 --- /dev/null +++ b/src/mame/machine/model1io2.cpp @@ -0,0 +1,349 @@ +// license: BSD-3-Clause +// copyright-holders: Dirk Best +/*************************************************************************** + + Sega Model 1 I/O Board (Advanced) + + Used by: + - Wing War (R360) (837-10859) + - NetMerc (837-11659) + - Virtua Cop (837-11130 with 837-11131) + + Diagnostic LCD: + + It's possible to attach a small LCD to the board and enable a + diagnostic mode. To try this in MAME, enable the 'Diagnostic' + view, then map keys to I/O board buttons. Hold button 0 and + press F3 to reset. The main screen will display 'I/O board error' + but the LCD at the bottom is now active. Control it with board + buttons 0 (up), 1 (down) and 2 (select). + + It's also possible to show some debug values while the game is + running. To do this, hold board button '1' and push reset. Use + buttons 0 and 1 to scroll the screen. + + Debug mode: + + You can attach a terminal to SIO channel B. Attach it to the + MAME slot option 'ioboard:debug'. You need to set the dip + switch to 'Debug Console' and hold board button 0 at startup. + + Default settings are 9600-8-N-1. It will output "RS". + You can then enter the following commands: + + - DT[word1][word2]: Returns word2 bytes from location word1 + - GO: ? + - IN[byte1]: Return value from I/O port byte1 + - LH: ? + - OP[byte1][byte2]: Write value byte2 to I/O port byte1 + - T: Nothing + - XR: Return 26 bytes starting at location ff07 + - XM[26 bytes]: Write 26 bytes to location starting at ff07 + - ZP[word1][word2]: ff03=word1, ff05=word2 + - VR: Return id string + + NMI is related to the debug mode, not hooked up. + +***************************************************************************/ + +#include "emu.h" +#include "model1io2.h" +#include "cpu/z80/tmpz84c015.h" +#include "machine/msm6253.h" +#include "machine/315_5338a.h" +#include "bus/rs232/rs232.h" +#include "screen.h" + + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +DEFINE_DEVICE_TYPE(SEGA_MODEL1IO2, model1io2_device, "model1io2", "Sega Model 1 I/O Board (Advanced)") + +//------------------------------------------------- +// mem_map - z80 memory map +//------------------------------------------------- + +void model1io2_device::mem_map(address_map &map) +{ + map(0x0000, 0x7fff).rom(); + map(0x8000, 0x800f).rw("io", FUNC(sega_315_5338a_device::read), FUNC(sega_315_5338a_device::write)); + map(0x8040, 0x8040).portr("board"); + map(0x8080, 0x8080).portr("dsw1"); + map(0x8100, 0x8100).rw(this, FUNC(model1io2_device::fpga_r), FUNC(model1io2_device::fpga_w)); +// map(0x8180, 0x8183).nopr(); // displayed as 4 byte values in the diagnostic screen +// map(0x81a0, 0x81af).nopw(); // the (reserved) test in the diagnostic screen sets these + map(0x8200, 0x8203).mirror(0x04).rw("adc", FUNC(msm6253_device::d0_r), FUNC(msm6253_device::address_w)); +// map(0x8400, 0x8400) // jumps here when debug mode is set and board button 0 is not active on reset + map(0xe000, 0xefff).ram(); // backup ram + map(0xf000, 0xffff).ram(); +} + +//------------------------------------------------- +// input_ports - device-specific input ports +//------------------------------------------------- + +static INPUT_PORTS_START( model1io2 ) + PORT_START("board") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_OTHER) PORT_NAME("Board 0") // on reset: port 4 does diagnostic menu (in debug mode: prevents jump to 8400) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_OTHER) PORT_NAME("Board 1") // on reset: port 4 does parameter display + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_OTHER) PORT_NAME("Board 2") // button 2 and 3 adjust the baud rate in debug + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_OTHER) PORT_NAME("Board 3") // mode when active at reset (9600, 4800, 2400, 1200) + PORT_DIPNAME(0x30, 0x30, "Mode") // jumpers on board? + PORT_DIPSETTING( 0x00, "Debug Console") + PORT_DIPSETTING( 0x10, "Normal 2") + PORT_DIPSETTING( 0x20, "Normal 1") + PORT_DIPSETTING( 0x30, "Normal 0") // default: no sio rx int (wingwar) +// might be mapped like this: +// PORT_DIPUNKNOWN(0x10, 0x10) // MODE (or ROM_EMU?) +// PORT_DIPUNKNOWN(0x20, 0x20) // GA_INT + PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_CUSTOM) PORT_READ_LINE_DEVICE_MEMBER("eeprom", eeprom_serial_93cxx_device, do_read) + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNUSED) +INPUT_PORTS_END + +ioport_constructor model1io2_device::device_input_ports() const +{ + return INPUT_PORTS_NAME(model1io2); +} + +//------------------------------------------------- +// device_add_mconfig - add device configuration +//------------------------------------------------- + +MACHINE_CONFIG_START( model1io2_device::device_add_mconfig ) + MCFG_DEVICE_ADD("iocpu", TMPZ84C015, 19.6608_MHz_XTAL / 2) // TMPZ84C015AF-12 + MCFG_DEVICE_PROGRAM_MAP(mem_map) + + // SIO channel a baud rate adjusted by dsw1 1+2: 38400, 19200, 9600, 4800 + MCFG_TMPZ84C015_ZC2_CB(WRITELINE("iocpu", tmpz84c015_device, rxca_w)) + MCFG_DEVCB_CHAIN_OUTPUT(WRITELINE("iocpu", tmpz84c015_device, txca_w)) + MCFG_TMPZ84C015_ZC3_CB(WRITELINE("iocpu", tmpz84c015_device, rxtxcb_w)) + + MCFG_TMPZ84C015_OUT_TXDB_CB(WRITELINE("debug", rs232_port_device, write_txd)) + + MCFG_TMPZ84C015_IN_PA_CB(IOPORT("dsw2")) + MCFG_TMPZ84C015_IN_PB_CB(IOPORT("dsw3")) + + MCFG_DEVICE_ADD("debug", RS232_PORT, default_rs232_devices, nullptr) + MCFG_RS232_RXD_HANDLER(WRITELINE("iocpu", tmpz84c015_device, rxb_w)) + + MCFG_DEVICE_ADD("io", SEGA_315_5338A, 0) + MCFG_315_5338A_READ_CB(READ8(*this, model1io2_device, io_r)) + MCFG_315_5338A_WRITE_CB(WRITE8(*this, model1io2_device, io_w)) + MCFG_315_5338A_IN0_CB(READ8(*this, model1io2_device, in0_r)) + MCFG_315_5338A_IN1_CB(READ8(*this, model1io2_device, in1_r)) + MCFG_315_5338A_IN2_CB(READ8(*this, model1io2_device, in2_r)) + MCFG_315_5338A_IN4_CB(READ8(*this, model1io2_device, in4_r)) + MCFG_315_5338A_OUT3_CB(WRITE8(*this, model1io2_device, out3_w)) + MCFG_315_5338A_OUT4_CB(WRITE8(*this, model1io2_device, out4_w)) + MCFG_315_5338A_OUT5_CB(WRITE8(*this, model1io2_device, out5_w)) + MCFG_315_5338A_OUT6_CB(WRITE8(*this, model1io2_device, out6_w)) + + MCFG_EEPROM_SERIAL_93C46_ADD("eeprom") // 93C45 + + MCFG_DEVICE_ADD("adc", MSM6253, 0) + MCFG_MSM6253_IN0_ANALOG_READ(model1io2_device, analog0_r) + MCFG_MSM6253_IN1_ANALOG_READ(model1io2_device, analog1_r) + MCFG_MSM6253_IN2_ANALOG_READ(model1io2_device, analog2_r) + MCFG_MSM6253_IN3_ANALOG_READ(model1io2_device, analog3_r) + + // diagnostic lcd display + MCFG_SCREEN_ADD("screen", LCD) + MCFG_SCREEN_REFRESH_RATE(50) + MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) // not accurate + MCFG_SCREEN_SIZE(6*20+1, 19) + MCFG_SCREEN_VISIBLE_AREA(0, 6*20, 0, 19-1) + MCFG_SCREEN_UPDATE_DEVICE("lcd", hd44780_device, screen_update) + MCFG_SCREEN_PALETTE("palette") + + MCFG_PALETTE_ADD("palette", 3) + MCFG_PALETTE_INIT_OWNER(model1io2_device, lcd) + + MCFG_HD44780_ADD("lcd") + MCFG_HD44780_LCD_SIZE(2, 20) + MCFG_HD44780_PIXEL_UPDATE_CB(model1io2_device, lcd_pixel_update) +MACHINE_CONFIG_END + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// model1io2_device - constructor +//------------------------------------------------- + +model1io2_device::model1io2_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : + device_t(mconfig, SEGA_MODEL1IO2, tag, owner, clock), + m_eeprom(*this, "eeprom"), + m_lcd(*this, "lcd"), + m_led_comm_err(*this, "led_comm_err"), + m_read_cb(*this), m_write_cb(*this), + m_in_cb{ {*this}, {*this}, {*this} }, + m_drive_read_cb(*this), m_drive_write_cb(*this), + m_an_cb{ {*this}, {*this}, {*this}, {*this}, {*this}, {*this}, {*this}, {*this} }, + m_output_cb(*this), + m_secondary_controls(false), + m_lcd_data(0) +{ +} + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void model1io2_device::device_start() +{ + // resolve callbacks + m_led_comm_err.resolve(); + + m_read_cb.resolve_safe(0xff); + m_write_cb.resolve_safe(); + + for (unsigned i = 0; i < 3; i++) + m_in_cb[i].resolve_safe(0xff); + + m_drive_read_cb.resolve_safe(0xff); + m_drive_write_cb.resolve_safe(); + + for (unsigned i = 0; i < 8; i++) + m_an_cb[i].resolve_safe(0xff); + + m_output_cb.resolve_safe(); + + // register for save states + save_item(NAME(m_secondary_controls)); + save_item(NAME(m_lcd_data)); +} + + +//************************************************************************** +// DIAGNOSTIC LCD +//************************************************************************** + +PALETTE_INIT_MEMBER( model1io2_device, lcd ) +{ + palette.set_pen_color(0, rgb_t(138, 146, 148)); // background + palette.set_pen_color(1, rgb_t( 92, 83, 88)); // lcd pixel on + palette.set_pen_color(2, rgb_t(131, 136, 139)); // lcd pixel off +} + +HD44780_PIXEL_UPDATE( model1io2_device::lcd_pixel_update ) +{ + // char size is 5x8 + if (x > 4 || y > 7) + return; + + if (line < 2 && pos < 20) + bitmap.pix16(1 + y + line*8 + line, 1 + pos*6 + x) = state ? 1 : 2; +} + + +//************************************************************************** +// INTERFACE +//************************************************************************** + +READ8_MEMBER( model1io2_device::io_r ) +{ + return m_read_cb(offset); +} + +WRITE8_MEMBER( model1io2_device::io_w ) +{ + m_write_cb(offset, data, 0xff); +} + +READ8_MEMBER( model1io2_device::in0_r ) +{ + return m_in_cb[0](0); +} + +READ8_MEMBER( model1io2_device::in1_r ) +{ + return m_in_cb[1](0); +} + +READ8_MEMBER( model1io2_device::in2_r ) +{ + return m_in_cb[2](0); +} + +WRITE8_MEMBER( model1io2_device::out3_w ) +{ + m_output_cb(data); +} + +READ8_MEMBER( model1io2_device::in4_r ) +{ + return m_drive_read_cb(0); +} + +WRITE8_MEMBER( model1io2_device::out4_w ) +{ + m_lcd_data = data; + m_drive_write_cb(data); +} + +WRITE8_MEMBER( model1io2_device::out5_w ) +{ + // 7------- not used? + // -6------ eeprom di + // --5----- eeprom clk + // ---4---- eeprom cs + // ----3--- unknown + // -----2-- lcd e + // ------1- lcd rw + // -------0 lcd rs + + m_eeprom->clk_write(BIT(data, 5) ? ASSERT_LINE : CLEAR_LINE); + m_eeprom->di_write(BIT(data, 6)); + m_eeprom->cs_write(BIT(data, 4) ? ASSERT_LINE : CLEAR_LINE); + + if (BIT(data, 2) == 1 && BIT(data, 1) == 0) + m_lcd->write(space, BIT(data, 0), m_lcd_data); +} + +WRITE8_MEMBER( model1io2_device::out6_w ) +{ + // 7------- unknown (input related?) + // -6------ control panel switch + // --5----- comm_err led + // ---4---- unknown + // ----32-- not used? + // ------1- unknown (sio channel a related) + // -------0 interrupt processing (1 while in the int routine) + + m_secondary_controls = BIT(data, 6); + m_led_comm_err = BIT(~data, 5); +} + +READ8_MEMBER( model1io2_device::fpga_r ) +{ + return 0x80; +} + +WRITE8_MEMBER( model1io2_device::fpga_w ) +{ + // fpga data uploaded here (vcop) +} + +ioport_value model1io2_device::analog0_r() +{ + return m_secondary_controls ? m_an_cb[4](0) : m_an_cb[0](0); +} + +ioport_value model1io2_device::analog1_r() +{ + return m_secondary_controls ? m_an_cb[5](0) : m_an_cb[1](0); +} + +ioport_value model1io2_device::analog2_r() +{ + return m_secondary_controls ? m_an_cb[6](0) : m_an_cb[2](0); +} + +ioport_value model1io2_device::analog3_r() +{ + return m_secondary_controls ? m_an_cb[7](0) : m_an_cb[3](0); +} |