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https://github.com/holub/mame
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MD2: Added some code. Still not working. (nw)
This commit is contained in:
Robbbert
parent
b6e10f16b7
commit
72b8d4536e
@ -1,12 +1,30 @@
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// license:BSD-3-Clause
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// copyright-holders:Miodrag Milanovic
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/***************************************************************************
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// copyright-holders:Miodrag Milanovic, Robbbert
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/**********************************************************************************************
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Morrow Designs Micro Decision
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Morrow Designs Micro Decision
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2009-12-10 Skeleton driver.
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2009-12-10 Skeleton driver.
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****************************************************************************/
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Although it looks like an ordinary CP/M computer, the monitor and keyboard are actually a
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dumb terminal plugged into the base unit. Therefore the roms and details of the terminal are
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needed.
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Board design changes depending on bios version of base unit:
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In earliest design, F7 sets up VFO and F8 selects motor on, while fdc does drive select.
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Later version gets rid of these, and F7 now does motor on and drive select; also addition of
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i8253 timer, a centronics port, and a diagnostic jumper. F8 is unused.
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Currently (as at 2016-07-17), memory test works, rom banking works, disk does NOT boot.
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Ver 1 roms say "Not found", Ver 2 roms hang after pressing enter, Ver 3 rom hangs after memory test.
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ToDo:
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- Make the floppy boot
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- Add i8253 timer chip
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- Add centronics parts
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- Different hardware for different bios versions (only earliest design is coded)
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***********************************************************************************************/
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#include "emu.h"
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#include "cpu/z80/z80.h"
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@ -14,27 +32,41 @@
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#include "machine/terminal.h"
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#include "softlist.h"
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#define TERMINAL_TAG "terminal"
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class microdec_state : public driver_device
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{
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public:
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microdec_state(const machine_config &mconfig, device_type type, const char *tag)
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: driver_device(mconfig, type, tag),
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m_terminal(*this, TERMINAL_TAG),
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m_maincpu(*this, "maincpu")
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: driver_device(mconfig, type, tag)
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, m_terminal(*this, "terminal")
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, m_maincpu(*this, "maincpu")
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, m_fdc(*this, "fdc")
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, m_floppy0(*this, "fdc:0")
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, m_floppy(nullptr)
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{
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}
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DECLARE_READ8_MEMBER(status_r);
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DECLARE_READ8_MEMBER(keyin_r);
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DECLARE_WRITE8_MEMBER(kbd_put);
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DECLARE_READ8_MEMBER(portf5_r);
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DECLARE_READ8_MEMBER(portf6_r);
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DECLARE_WRITE8_MEMBER(portf6_w);
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DECLARE_READ8_MEMBER(portf7_r);
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DECLARE_WRITE8_MEMBER(portf7_w);
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DECLARE_WRITE8_MEMBER(portf8_w);
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DECLARE_DRIVER_INIT(microdec);
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private:
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UINT8 m_term_data;
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UINT8 m_portf8;
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bool m_fdc_rdy;
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virtual void machine_reset() override;
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virtual void machine_start() override;
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required_device<generic_terminal_device> m_terminal;
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required_device<cpu_device> m_maincpu;
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required_device<upd765a_device> m_fdc;
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required_device<floppy_connector> m_floppy0;
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floppy_image_device *m_floppy;
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};
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@ -50,17 +82,74 @@ READ8_MEMBER( microdec_state::keyin_r )
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return ret;
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}
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/*
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d0-2 : motor on signals from f8
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d3 : ack (cent)
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d4 : ready (fdd)
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d5 : diag jumper (md3 only) */
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READ8_MEMBER( microdec_state::portf5_r )
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{
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m_fdc->set_ready_line_connected(m_fdc_rdy);
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UINT8 data = m_portf8 | ioport("DIAG")->read() | 0xc0;
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return data;
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}
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// disable eprom
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READ8_MEMBER( microdec_state::portf6_r )
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{
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membank("bankr0")->set_entry(0); // point at ram
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return 0xff;
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}
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// TC pin on fdc
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READ8_MEMBER( microdec_state::portf7_r )
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{
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m_fdc->tc_w(1);
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return 0xff;
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}
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// enable eprom
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WRITE8_MEMBER( microdec_state::portf6_w )
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{
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membank("bankr0")->set_entry(1); // point at rom
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}
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// sets up VFO stuff
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WRITE8_MEMBER( microdec_state::portf7_w )
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{
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m_fdc_rdy = BIT(data,2);
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}
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/*
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d0-2 : motor on for drive sockets
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d3 : precomp */
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WRITE8_MEMBER( microdec_state::portf8_w )
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{
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m_portf8 = data & 7;
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/* code for motor on per drive goes here */
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m_floppy = m_floppy0->get_device();
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m_fdc->set_floppy(m_floppy);
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if (m_floppy)
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m_floppy->mon_w(0);
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}
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static ADDRESS_MAP_START(microdec_mem, AS_PROGRAM, 8, microdec_state)
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ADDRESS_MAP_UNMAP_HIGH
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AM_RANGE( 0x0000, 0x0fff ) AM_ROM
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AM_RANGE( 0x0000, 0x0fff ) AM_READ_BANK("bankr0") AM_WRITE_BANK("bankw0")
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AM_RANGE( 0x1000, 0xffff ) AM_RAM
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ADDRESS_MAP_END
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static ADDRESS_MAP_START(microdec_io, AS_IO, 8, microdec_state)
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ADDRESS_MAP_UNMAP_HIGH
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ADDRESS_MAP_GLOBAL_MASK(0xff)
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AM_RANGE(0xfa, 0xfb) AM_DEVICE("upd765", upd765a_device, map)
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AM_RANGE(0xfc, 0xfc) AM_READ(keyin_r) AM_DEVWRITE(TERMINAL_TAG, generic_terminal_device, write)
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AM_RANGE(0xf5, 0xf5) AM_READ(portf5_r)
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AM_RANGE(0xf6, 0xf6) AM_READWRITE(portf6_r,portf6_w)
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AM_RANGE(0xf7, 0xf7) AM_READWRITE(portf7_r,portf7_w)
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AM_RANGE(0xf8, 0xf8) AM_WRITE(portf8_w)
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AM_RANGE(0xfa, 0xfb) AM_DEVICE("fdc", upd765a_device, map)
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AM_RANGE(0xfc, 0xfc) AM_READ(keyin_r) AM_DEVWRITE("terminal", generic_terminal_device, write)
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AM_RANGE(0xfd, 0xfd) AM_READ(status_r)
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// AM_RANGE(0xf0, 0xf3) 8253 PIT (md3 only) used as a baud rate generator for serial ports
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// AM_RANGE(0xf4, 0xf4) Centronics data
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@ -68,14 +157,18 @@ static ADDRESS_MAP_START(microdec_io, AS_IO, 8, microdec_state)
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// AM_RANGE(0xf5, 0xf5) Centronics status (md3) read bit 3 (ack=1); read bit 4 (busy=1); write bit 7 (stb=0)
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// AM_RANGE(0xf6, 0xf6) rom enable (w=enable; r=disable)
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// AM_RANGE(0xf7, 0xf7) VFO Count set
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// AM_RANGE(0xf8, 0xf8) Motor and SHift control
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// AM_RANGE(0xf8, 0xf8) Motor and Shift control
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// AM_RANGE(0xfa, 0xfb) uPD765C fdc FA=status; FB=data
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// AM_RANGE(0xfc, 0xfd) Serial Port 1 FC=data FD=status
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// AM_RANGE(0xfe, 0xff) Serial Port 2 FE=data FF=status
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// AM_RANGE(0xfc, 0xfd) Serial Port 1 (terminal) FC=data FD=status
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// AM_RANGE(0xfe, 0xff) Serial Port 2 (printer) FE=data FF=status
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ADDRESS_MAP_END
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/* Input ports */
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static INPUT_PORTS_START( microdec )
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PORT_START("DIAG")
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PORT_DIPNAME( 0x20, 0x20, "Diagnostics" )
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PORT_DIPSETTING( 0x20, DEF_STR( Off ) )
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PORT_DIPSETTING( 0x00, DEF_STR( On ) )
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INPUT_PORTS_END
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void microdec_state::machine_start()
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@ -84,6 +177,9 @@ void microdec_state::machine_start()
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void microdec_state::machine_reset()
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{
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membank("bankr0")->set_entry(1); // point at rom
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membank("bankw0")->set_entry(0); // always write to ram
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m_maincpu->set_input_line_vector(0, 0x7f);
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m_term_data = 0;
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}
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@ -96,6 +192,15 @@ static SLOT_INTERFACE_START( microdec_floppies )
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SLOT_INTERFACE( "525hd", FLOPPY_525_HD )
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SLOT_INTERFACE_END
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DRIVER_INIT_MEMBER( microdec_state, microdec )
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{
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UINT8 *main = memregion("maincpu")->base();
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membank("bankr0")->configure_entry(1, &main[0x0000]);
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membank("bankr0")->configure_entry(0, &main[0x1000]);
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membank("bankw0")->configure_entry(0, &main[0x1000]);
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}
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static MACHINE_CONFIG_START( microdec, microdec_state )
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/* basic machine hardware */
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MCFG_CPU_ADD("maincpu",Z80, XTAL_4MHz)
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@ -103,12 +208,15 @@ static MACHINE_CONFIG_START( microdec, microdec_state )
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MCFG_CPU_IO_MAP(microdec_io)
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/* video hardware */
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MCFG_DEVICE_ADD(TERMINAL_TAG, GENERIC_TERMINAL, 0)
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MCFG_DEVICE_ADD("terminal", GENERIC_TERMINAL, 0)
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MCFG_GENERIC_TERMINAL_KEYBOARD_CB(WRITE8(microdec_state, kbd_put))
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MCFG_UPD765A_ADD("upd765", true, true)
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MCFG_FLOPPY_DRIVE_ADD("upd765:0", microdec_floppies, "525hd", floppy_image_device::default_floppy_formats)
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MCFG_FLOPPY_DRIVE_ADD("upd765:1", microdec_floppies, "525hd", floppy_image_device::default_floppy_formats)
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MCFG_UPD765A_ADD("fdc", true, true)
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MCFG_UPD765_INTRQ_CALLBACK(INPUTLINE("maincpu", INPUT_LINE_IRQ0))
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MCFG_FLOPPY_DRIVE_ADD("fdc:0", microdec_floppies, "525hd", floppy_image_device::default_floppy_formats)
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MCFG_FLOPPY_DRIVE_SOUND(true)
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//MCFG_FLOPPY_DRIVE_ADD("fdc:1", microdec_floppies, "525hd", floppy_image_device::default_floppy_formats)
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//MCFG_FLOPPY_DRIVE_SOUND(true)
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// software lists
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MCFG_SOFTWARE_LIST_ADD("flop_list", "md2_flop")
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@ -116,7 +224,7 @@ MACHINE_CONFIG_END
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/* ROM definition */
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ROM_START( md2 )
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ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
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ROM_REGION( 0x2000, "maincpu", ROMREGION_ERASEFF )
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ROM_SYSTEM_BIOS( 0, "v13", "v1.3" )
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ROMX_LOAD( "md2-13.bin", 0x0000, 0x0800, CRC(43f4c9ab) SHA1(48a35cbee4f341310e9cba5178c3fd6e74ef9748), ROM_BIOS(1))
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ROM_SYSTEM_BIOS( 1, "v13a", "v1.3a" )
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@ -130,7 +238,7 @@ ROM_START( md2 )
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ROM_END
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ROM_START( md3 )
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ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
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ROM_REGION( 0x2000, "maincpu", ROMREGION_ERASEFF )
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ROM_SYSTEM_BIOS( 0, "v23a", "v2.3a" )
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ROMX_LOAD( "md3-23a.bin", 0x0000, 0x1000, CRC(95d59980) SHA1(ae65a8e8e2823cf4cf6b1d74c0996248e290e9f1), ROM_BIOS(1))
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ROM_SYSTEM_BIOS( 1, "v25", "v2.5" )
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@ -141,6 +249,6 @@ ROM_END
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/* Driver */
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/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */
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COMP( 1982, md2, 0, 0, microdec, microdec, driver_device, 0, "Morrow Designs", "Micro Decision MD-2", MACHINE_NOT_WORKING | MACHINE_NO_SOUND)
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COMP( 1982, md3, md2, 0, microdec, microdec, driver_device, 0, "Morrow Designs", "Micro Decision MD-3", MACHINE_NOT_WORKING | MACHINE_NO_SOUND)
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/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */
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COMP( 1982, md2, 0, 0, microdec, microdec, microdec_state, microdec, "Morrow Designs", "Micro Decision MD-2", MACHINE_NOT_WORKING | MACHINE_NO_SOUND_HW )
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COMP( 1982, md3, md2, 0, microdec, microdec, microdec_state, microdec, "Morrow Designs", "Micro Decision MD-3", MACHINE_NOT_WORKING | MACHINE_NO_SOUND_HW )
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