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(nw) mx2178 : added required nmi

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This commit is contained in:
Robbbert 2017-10-20 11:12:32 +11:00
parent 85d253fcf5
commit e28f1da1fc
1 changed files with 40 additions and 27 deletions
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67
src/mame/drivers/mx2178.cpp
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@ -2,23 +2,23 @@
// copyright-holders:Robbbert
/***************************************************************************************************
Skeleton driver for Memorex 2178
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.
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.
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 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.
- 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.
***************************************************************************************************/
@ -40,8 +40,7 @@ public:
, m_p_videoram(*this, "videoram")
, m_maincpu(*this, "maincpu")
, m_p_chargen(*this, "chargen")
{
}
{ }
MC6845_UPDATE_ROW(crtc_update_row);
@ -65,8 +64,10 @@ 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
@ -144,19 +145,31 @@ static MACHINE_CONFIG_START( mx2178 )
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_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 */