diff options
Diffstat (limited to 'src/mame/drivers/mx2178.cpp')
-rw-r--r-- | src/mame/drivers/mx2178.cpp | 96 |
1 files changed, 58 insertions, 38 deletions
diff --git a/src/mame/drivers/mx2178.cpp b/src/mame/drivers/mx2178.cpp index 471d8bf37a0..28678dc94d3 100644 --- a/src/mame/drivers/mx2178.cpp +++ b/src/mame/drivers/mx2178.cpp @@ -2,30 +2,31 @@ // copyright-holders:Robbbert /*************************************************************************************************** - Skeleton driver for Memorex 2178 - - Chips: Z80A, N8X305N, 2x B8452A, 4x D4016C-3, 2x HD468A50P, HD46505SP-1 - Crystal: 18.8696MHz - There is a large piezo-beeper. - - TODO: - - Connect up the beeper - - RS232 not working (6850 parameters are /64, 8 bit, 2 stop bit, IRQ when key pressed) - - Unknown port i/o 80 - - Unknown memory i/o C000, 4000 - - Need schematic / tech manual - - Gets stuck waiting for E011 to become zero somehow. If you skip that, a status line appears. - - Doesn't seem to be any dips, looks like all settings and modes are controlled by keystrokes. - - 8X305 is a 16-bit Microcontroller which should have an external ROM. It would communicate with - the Z80 via a common 8-bit I/O bus. No idea what it is used for here, but in another system it - acts as the floppy disk controller. +Skeleton driver for Memorex 2178 + +Chips: Z80A, N8X305N, 2x B8452A, 4x D4016C-3, 2x HD468A50P, HD46505SP-1 +Crystal: 18.8696MHz +There is a large piezo-beeper. + +TODO: +- Connect up the beeper +- Unknown memory i/o C000, 4000 +- Need schematic / tech manual +- Doesn't seem to be any dips, looks like all settings and modes are controlled by keystrokes. +- 8X305 is a 16-bit bipolar processor which appears to use four external PROMs (undumped). It + would communicate with the Z80 via a common 8-bit I/O bus. No idea what it is used for here, + but in another system it acts as the floppy disk controller. +- Debug trick: set pc=809 to see the test menu. +- It shows the status line but keystrokes are ignored. After 20 minutes of inactivity, the screen + goes blank. Pressing a key will restore it. ***************************************************************************************************/ #include "emu.h" -#include "bus/rs232/rs232.h" #include "cpu/z80/z80.h" +//#include "cpu/8x300/8x300.h" // device = N8X300 #include "machine/6850acia.h" +#include "bus/rs232/rs232.h" #include "machine/clock.h" #include "video/mc6845.h" #include "screen.h" @@ -40,15 +41,14 @@ public: , m_p_videoram(*this, "videoram") , m_maincpu(*this, "maincpu") , m_p_chargen(*this, "chargen") - { - } + { } MC6845_UPDATE_ROW(crtc_update_row); private: virtual void machine_reset() override; required_device<palette_device> m_palette; - required_shared_ptr<uint8_t> m_p_videoram; + required_shared_ptr<u8> m_p_videoram; required_device<z80_device> m_maincpu; required_region_ptr<u8> m_p_chargen; }; @@ -65,8 +65,10 @@ static ADDRESS_MAP_START(mx2178_io, AS_IO, 8, mx2178_state) ADDRESS_MAP_GLOBAL_MASK(0xff) AM_RANGE(0x00, 0x00) AM_DEVREADWRITE("crtc", mc6845_device, status_r, address_w) AM_RANGE(0x01, 0x01) AM_DEVREADWRITE("crtc", mc6845_device, register_r, register_w) - AM_RANGE(0xa0, 0xa0) AM_DEVREADWRITE("acia", acia6850_device, status_r, control_w) - AM_RANGE(0xa1, 0xa1) AM_DEVREADWRITE("acia", acia6850_device, data_r, data_w) + AM_RANGE(0x80, 0x80) AM_DEVREADWRITE("acia1", acia6850_device, status_r, control_w) + AM_RANGE(0x81, 0x81) AM_DEVREADWRITE("acia1", acia6850_device, data_r, data_w) + AM_RANGE(0xa0, 0xa0) AM_DEVREADWRITE("acia2", acia6850_device, status_r, control_w) + AM_RANGE(0xa1, 0xa1) AM_DEVREADWRITE("acia2", acia6850_device, data_r, data_w) ADDRESS_MAP_END @@ -125,7 +127,7 @@ void mx2178_state::machine_reset() static MACHINE_CONFIG_START( mx2178 ) /* basic machine hardware */ - MCFG_CPU_ADD("maincpu", Z80, 18869600/5) // guess + MCFG_CPU_ADD("maincpu", Z80, XTAL_18_8696MHz / 5) // guess MCFG_CPU_PROGRAM_MAP(mx2178_mem) MCFG_CPU_IO_MAP(mx2178_io) @@ -140,32 +142,50 @@ static MACHINE_CONFIG_START( mx2178 ) MCFG_PALETTE_ADD_MONOCHROME("palette") /* Devices */ - MCFG_MC6845_ADD("crtc", MC6845, "screen", 18869600 / 8) // clk unknown + MCFG_MC6845_ADD("crtc", MC6845, "screen", XTAL_18_8696MHz / 8) // clk unknown MCFG_MC6845_SHOW_BORDER_AREA(false) MCFG_MC6845_CHAR_WIDTH(8) MCFG_MC6845_UPDATE_ROW_CB(mx2178_state, crtc_update_row) + MCFG_MC6845_OUT_VSYNC_CB(INPUTLINE("maincpu", INPUT_LINE_NMI)) - MCFG_DEVICE_ADD("acia_clock", CLOCK, 18869600/30) - MCFG_CLOCK_SIGNAL_HANDLER(DEVWRITELINE("acia", acia6850_device, write_txc)) - MCFG_DEVCB_CHAIN_OUTPUT(DEVWRITELINE("acia", acia6850_device, write_rxc)) + MCFG_DEVICE_ADD("acia_clock", CLOCK, XTAL_18_8696MHz / 30) + MCFG_CLOCK_SIGNAL_HANDLER(DEVWRITELINE("acia1", acia6850_device, write_txc)) + MCFG_DEVCB_CHAIN_OUTPUT(DEVWRITELINE("acia1", acia6850_device, write_rxc)) + MCFG_DEVCB_CHAIN_OUTPUT(DEVWRITELINE("acia2", acia6850_device, write_rxc)) + MCFG_DEVCB_CHAIN_OUTPUT(DEVWRITELINE("acia2", acia6850_device, write_rxc)) - MCFG_DEVICE_ADD("acia", ACIA6850, 0) - MCFG_ACIA6850_TXD_HANDLER(DEVWRITELINE("rs232", rs232_port_device, write_txd)) - MCFG_ACIA6850_RTS_HANDLER(DEVWRITELINE("rs232", rs232_port_device, write_rts)) + MCFG_DEVICE_ADD("acia1", ACIA6850, 0) + MCFG_ACIA6850_TXD_HANDLER(DEVWRITELINE("rs232a", rs232_port_device, write_txd)) + MCFG_ACIA6850_RTS_HANDLER(DEVWRITELINE("rs232a", rs232_port_device, write_rts)) MCFG_ACIA6850_IRQ_HANDLER(INPUTLINE("maincpu", INPUT_LINE_IRQ0)) - MCFG_RS232_PORT_ADD("rs232", default_rs232_devices, "keyboard") - MCFG_RS232_RXD_HANDLER(DEVWRITELINE("acia", acia6850_device, write_rxd)) - MCFG_RS232_CTS_HANDLER(DEVWRITELINE("acia", acia6850_device, write_cts)) + MCFG_RS232_PORT_ADD("rs232a", default_rs232_devices, nullptr) + MCFG_RS232_RXD_HANDLER(DEVWRITELINE("acia1", acia6850_device, write_rxd)) + MCFG_RS232_CTS_HANDLER(DEVWRITELINE("acia1", acia6850_device, write_cts)) + + MCFG_DEVICE_ADD("acia2", ACIA6850, 0) + MCFG_ACIA6850_TXD_HANDLER(DEVWRITELINE("rs232b", rs232_port_device, write_txd)) + MCFG_ACIA6850_RTS_HANDLER(DEVWRITELINE("rs232b", rs232_port_device, write_rts)) + MCFG_ACIA6850_IRQ_HANDLER(INPUTLINE("maincpu", INPUT_LINE_IRQ0)) + + MCFG_RS232_PORT_ADD("rs232b", default_rs232_devices, "keyboard") + MCFG_RS232_RXD_HANDLER(DEVWRITELINE("acia2", acia6850_device, write_rxd)) + MCFG_RS232_CTS_HANDLER(DEVWRITELINE("acia2", acia6850_device, write_cts)) MACHINE_CONFIG_END /* ROM definition */ ROM_START( mx2178 ) - ROM_REGION(0x2000, "roms", 0) - ROM_LOAD( "96274139.bin", 0x000000, 0x002000, CRC(eb471a27) SHA1(433abefd1a72653d0bf35bcaaeccf9943b96260b) ) + ROM_REGION(0x2000, "roms", 0) // MBM2764-25 + ROM_LOAD( "96274139.u9", 0x000000, 0x002000, CRC(eb471a27) SHA1(433abefd1a72653d0bf35bcaaeccf9943b96260b) ) + + ROM_REGION(0x800, "proms", 0) // MB7122E - actual mapping not known + ROMX_LOAD( "96270350.q2", 0x0000, 0x0400, NO_DUMP, ROM_NIBBLE | ROM_SHIFT_NIBBLE_LO | ROM_SKIP(1) ) + ROMX_LOAD( "96270368.r2", 0x0000, 0x0400, NO_DUMP, ROM_NIBBLE | ROM_SHIFT_NIBBLE_HI | ROM_SKIP(1) ) + ROMX_LOAD( "96270376.s2", 0x0001, 0x0400, NO_DUMP, ROM_NIBBLE | ROM_SHIFT_NIBBLE_LO | ROM_SKIP(1) ) + ROMX_LOAD( "96270384.t2", 0x0001, 0x0400, NO_DUMP, ROM_NIBBLE | ROM_SHIFT_NIBBLE_HI | ROM_SKIP(1) ) - ROM_REGION(0x1000, "chargen", 0) - ROM_LOAD( "96273883.bin", 0x000000, 0x001000, CRC(8311fadd) SHA1(573bbad23e893ad9374edc929642dc1cba3452d2) ) + ROM_REGION(0x1000, "chargen", 0) // D2732A-3 + ROM_LOAD( "96273883.c7", 0x000000, 0x001000, CRC(8311fadd) SHA1(573bbad23e893ad9374edc929642dc1cba3452d2) ) ROM_END /* Driver */ |