From 72b8d4536e0f184fd621d7658df7da909b596e4b Mon Sep 17 00:00:00 2001 From: Robbbert Date: Sun, 17 Jul 2016 18:22:24 +1000 Subject: [PATCH] MD2: Added some code. Still not working. (nw) --- src/mame/drivers/microdec.cpp | 156 ++++++++++++++++++++++++++++------ 1 file changed, 132 insertions(+), 24 deletions(-) diff --git a/src/mame/drivers/microdec.cpp b/src/mame/drivers/microdec.cpp index 9d5bd930400..29cd9198146 100644 --- a/src/mame/drivers/microdec.cpp +++ b/src/mame/drivers/microdec.cpp @@ -1,12 +1,30 @@ // license:BSD-3-Clause -// copyright-holders:Miodrag Milanovic -/*************************************************************************** +// copyright-holders:Miodrag Milanovic, Robbbert +/********************************************************************************************** - Morrow Designs Micro Decision +Morrow Designs Micro Decision - 2009-12-10 Skeleton driver. +2009-12-10 Skeleton driver. -****************************************************************************/ +Although it looks like an ordinary CP/M computer, the monitor and keyboard are actually a +dumb terminal plugged into the base unit. Therefore the roms and details of the terminal are +needed. + +Board design changes depending on bios version of base unit: +In earliest design, F7 sets up VFO and F8 selects motor on, while fdc does drive select. +Later version gets rid of these, and F7 now does motor on and drive select; also addition of +i8253 timer, a centronics port, and a diagnostic jumper. F8 is unused. + +Currently (as at 2016-07-17), memory test works, rom banking works, disk does NOT boot. +Ver 1 roms say "Not found", Ver 2 roms hang after pressing enter, Ver 3 rom hangs after memory test. + +ToDo: +- Make the floppy boot +- Add i8253 timer chip +- Add centronics parts +- Different hardware for different bios versions (only earliest design is coded) + +***********************************************************************************************/ #include "emu.h" #include "cpu/z80/z80.h" @@ -14,27 +32,41 @@ #include "machine/terminal.h" #include "softlist.h" -#define TERMINAL_TAG "terminal" class microdec_state : public driver_device { public: microdec_state(const machine_config &mconfig, device_type type, const char *tag) - : driver_device(mconfig, type, tag), - m_terminal(*this, TERMINAL_TAG), - m_maincpu(*this, "maincpu") + : driver_device(mconfig, type, tag) + , m_terminal(*this, "terminal") + , m_maincpu(*this, "maincpu") + , m_fdc(*this, "fdc") + , m_floppy0(*this, "fdc:0") + , m_floppy(nullptr) { } DECLARE_READ8_MEMBER(status_r); DECLARE_READ8_MEMBER(keyin_r); DECLARE_WRITE8_MEMBER(kbd_put); + DECLARE_READ8_MEMBER(portf5_r); + DECLARE_READ8_MEMBER(portf6_r); + DECLARE_WRITE8_MEMBER(portf6_w); + DECLARE_READ8_MEMBER(portf7_r); + DECLARE_WRITE8_MEMBER(portf7_w); + DECLARE_WRITE8_MEMBER(portf8_w); + DECLARE_DRIVER_INIT(microdec); private: UINT8 m_term_data; + UINT8 m_portf8; + bool m_fdc_rdy; virtual void machine_reset() override; virtual void machine_start() override; required_device m_terminal; required_device m_maincpu; + required_device m_fdc; + required_device m_floppy0; + floppy_image_device *m_floppy; }; @@ -50,17 +82,74 @@ READ8_MEMBER( microdec_state::keyin_r ) return ret; } +/* +d0-2 : motor on signals from f8 +d3 : ack (cent) +d4 : ready (fdd) +d5 : diag jumper (md3 only) */ +READ8_MEMBER( microdec_state::portf5_r ) +{ + m_fdc->set_ready_line_connected(m_fdc_rdy); + + UINT8 data = m_portf8 | ioport("DIAG")->read() | 0xc0; + return data; +} + +// disable eprom +READ8_MEMBER( microdec_state::portf6_r ) +{ + membank("bankr0")->set_entry(0); // point at ram + return 0xff; +} + +// TC pin on fdc +READ8_MEMBER( microdec_state::portf7_r ) +{ + m_fdc->tc_w(1); + return 0xff; +} + +// enable eprom +WRITE8_MEMBER( microdec_state::portf6_w ) +{ + membank("bankr0")->set_entry(1); // point at rom +} + +// sets up VFO stuff +WRITE8_MEMBER( microdec_state::portf7_w ) +{ + m_fdc_rdy = BIT(data,2); +} + +/* +d0-2 : motor on for drive sockets +d3 : precomp */ +WRITE8_MEMBER( microdec_state::portf8_w ) +{ + m_portf8 = data & 7; + /* code for motor on per drive goes here */ + m_floppy = m_floppy0->get_device(); + m_fdc->set_floppy(m_floppy); + + if (m_floppy) + m_floppy->mon_w(0); +} + static ADDRESS_MAP_START(microdec_mem, AS_PROGRAM, 8, microdec_state) ADDRESS_MAP_UNMAP_HIGH - AM_RANGE( 0x0000, 0x0fff ) AM_ROM + AM_RANGE( 0x0000, 0x0fff ) AM_READ_BANK("bankr0") AM_WRITE_BANK("bankw0") AM_RANGE( 0x1000, 0xffff ) AM_RAM ADDRESS_MAP_END static ADDRESS_MAP_START(microdec_io, AS_IO, 8, microdec_state) ADDRESS_MAP_UNMAP_HIGH ADDRESS_MAP_GLOBAL_MASK(0xff) - AM_RANGE(0xfa, 0xfb) AM_DEVICE("upd765", upd765a_device, map) - AM_RANGE(0xfc, 0xfc) AM_READ(keyin_r) AM_DEVWRITE(TERMINAL_TAG, generic_terminal_device, write) + AM_RANGE(0xf5, 0xf5) AM_READ(portf5_r) + AM_RANGE(0xf6, 0xf6) AM_READWRITE(portf6_r,portf6_w) + AM_RANGE(0xf7, 0xf7) AM_READWRITE(portf7_r,portf7_w) + AM_RANGE(0xf8, 0xf8) AM_WRITE(portf8_w) + AM_RANGE(0xfa, 0xfb) AM_DEVICE("fdc", upd765a_device, map) + AM_RANGE(0xfc, 0xfc) AM_READ(keyin_r) AM_DEVWRITE("terminal", generic_terminal_device, write) AM_RANGE(0xfd, 0xfd) AM_READ(status_r) // AM_RANGE(0xf0, 0xf3) 8253 PIT (md3 only) used as a baud rate generator for serial ports // AM_RANGE(0xf4, 0xf4) Centronics data @@ -68,14 +157,18 @@ static ADDRESS_MAP_START(microdec_io, AS_IO, 8, microdec_state) // AM_RANGE(0xf5, 0xf5) Centronics status (md3) read bit 3 (ack=1); read bit 4 (busy=1); write bit 7 (stb=0) // AM_RANGE(0xf6, 0xf6) rom enable (w=enable; r=disable) // AM_RANGE(0xf7, 0xf7) VFO Count set - // AM_RANGE(0xf8, 0xf8) Motor and SHift control + // AM_RANGE(0xf8, 0xf8) Motor and Shift control // AM_RANGE(0xfa, 0xfb) uPD765C fdc FA=status; FB=data - // AM_RANGE(0xfc, 0xfd) Serial Port 1 FC=data FD=status - // AM_RANGE(0xfe, 0xff) Serial Port 2 FE=data FF=status + // AM_RANGE(0xfc, 0xfd) Serial Port 1 (terminal) FC=data FD=status + // AM_RANGE(0xfe, 0xff) Serial Port 2 (printer) FE=data FF=status ADDRESS_MAP_END /* Input ports */ static INPUT_PORTS_START( microdec ) + PORT_START("DIAG") + PORT_DIPNAME( 0x20, 0x20, "Diagnostics" ) + PORT_DIPSETTING( 0x20, DEF_STR( Off ) ) + PORT_DIPSETTING( 0x00, DEF_STR( On ) ) INPUT_PORTS_END void microdec_state::machine_start() @@ -84,6 +177,9 @@ void microdec_state::machine_start() void microdec_state::machine_reset() { + membank("bankr0")->set_entry(1); // point at rom + membank("bankw0")->set_entry(0); // always write to ram + m_maincpu->set_input_line_vector(0, 0x7f); m_term_data = 0; } @@ -96,6 +192,15 @@ static SLOT_INTERFACE_START( microdec_floppies ) SLOT_INTERFACE( "525hd", FLOPPY_525_HD ) SLOT_INTERFACE_END +DRIVER_INIT_MEMBER( microdec_state, microdec ) +{ + UINT8 *main = memregion("maincpu")->base(); + + membank("bankr0")->configure_entry(1, &main[0x0000]); + membank("bankr0")->configure_entry(0, &main[0x1000]); + membank("bankw0")->configure_entry(0, &main[0x1000]); +} + static MACHINE_CONFIG_START( microdec, microdec_state ) /* basic machine hardware */ MCFG_CPU_ADD("maincpu",Z80, XTAL_4MHz) @@ -103,12 +208,15 @@ static MACHINE_CONFIG_START( microdec, microdec_state ) MCFG_CPU_IO_MAP(microdec_io) /* video hardware */ - MCFG_DEVICE_ADD(TERMINAL_TAG, GENERIC_TERMINAL, 0) + MCFG_DEVICE_ADD("terminal", GENERIC_TERMINAL, 0) MCFG_GENERIC_TERMINAL_KEYBOARD_CB(WRITE8(microdec_state, kbd_put)) - MCFG_UPD765A_ADD("upd765", true, true) - MCFG_FLOPPY_DRIVE_ADD("upd765:0", microdec_floppies, "525hd", floppy_image_device::default_floppy_formats) - MCFG_FLOPPY_DRIVE_ADD("upd765:1", microdec_floppies, "525hd", floppy_image_device::default_floppy_formats) + MCFG_UPD765A_ADD("fdc", true, true) + MCFG_UPD765_INTRQ_CALLBACK(INPUTLINE("maincpu", INPUT_LINE_IRQ0)) + MCFG_FLOPPY_DRIVE_ADD("fdc:0", microdec_floppies, "525hd", floppy_image_device::default_floppy_formats) + MCFG_FLOPPY_DRIVE_SOUND(true) + //MCFG_FLOPPY_DRIVE_ADD("fdc:1", microdec_floppies, "525hd", floppy_image_device::default_floppy_formats) + //MCFG_FLOPPY_DRIVE_SOUND(true) // software lists MCFG_SOFTWARE_LIST_ADD("flop_list", "md2_flop") @@ -116,7 +224,7 @@ MACHINE_CONFIG_END /* ROM definition */ ROM_START( md2 ) - ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF ) + ROM_REGION( 0x2000, "maincpu", ROMREGION_ERASEFF ) ROM_SYSTEM_BIOS( 0, "v13", "v1.3" ) ROMX_LOAD( "md2-13.bin", 0x0000, 0x0800, CRC(43f4c9ab) SHA1(48a35cbee4f341310e9cba5178c3fd6e74ef9748), ROM_BIOS(1)) ROM_SYSTEM_BIOS( 1, "v13a", "v1.3a" ) @@ -130,7 +238,7 @@ ROM_START( md2 ) ROM_END ROM_START( md3 ) - ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF ) + ROM_REGION( 0x2000, "maincpu", ROMREGION_ERASEFF ) ROM_SYSTEM_BIOS( 0, "v23a", "v2.3a" ) ROMX_LOAD( "md3-23a.bin", 0x0000, 0x1000, CRC(95d59980) SHA1(ae65a8e8e2823cf4cf6b1d74c0996248e290e9f1), ROM_BIOS(1)) ROM_SYSTEM_BIOS( 1, "v25", "v2.5" ) @@ -141,6 +249,6 @@ ROM_END /* Driver */ -/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */ -COMP( 1982, md2, 0, 0, microdec, microdec, driver_device, 0, "Morrow Designs", "Micro Decision MD-2", MACHINE_NOT_WORKING | MACHINE_NO_SOUND) -COMP( 1982, md3, md2, 0, microdec, microdec, driver_device, 0, "Morrow Designs", "Micro Decision MD-3", MACHINE_NOT_WORKING | MACHINE_NO_SOUND) +/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */ +COMP( 1982, md2, 0, 0, microdec, microdec, microdec_state, microdec, "Morrow Designs", "Micro Decision MD-2", MACHINE_NOT_WORKING | MACHINE_NO_SOUND_HW ) +COMP( 1982, md3, md2, 0, microdec, microdec, microdec_state, microdec, "Morrow Designs", "Micro Decision MD-3", MACHINE_NOT_WORKING | MACHINE_NO_SOUND_HW )