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author Robbbert <Robbbert@users.noreply.github.com>2017-10-20 11:12:32 +1100
committer Robbbert <Robbbert@users.noreply.github.com>2017-10-20 11:12:32 +1100
commite28f1da1fcfa10474aa5a58f7bd830bdd631153b (patch)
tree76461dccb817e09bb9411d0a52e02319cbee8f43
parent85d253fcf54dc88de4d705dc0aff6c6123b264ac (diff)
(nw) mx2178 : added required nmi
-rw-r--r--src/mame/drivers/mx2178.cpp71
1 files changed, 42 insertions, 29 deletions
diff --git a/src/mame/drivers/mx2178.cpp b/src/mame/drivers/mx2178.cpp
index 471d8bf37a0..142caabf48d 100644
--- a/src/mame/drivers/mx2178.cpp
+++ b/src/mame/drivers/mx2178.cpp
@@ -2,23 +2,23 @@
// 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 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("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("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("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("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("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("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 */