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29b1e6283b
mame/src/mame/lsi/m3.cpp
Dirk Best 29b1e6283b lsi/m3: Fix floppy regression, add initial software list 
New working software list additions
-----------------------------------
M3 Utilities (Release 3) [Steve Hunt]
2025-01-11 13:08:07 +01:00

677 lines
25 KiB
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// license: BSD-3-Clause
// copyright-holders: Robbbert, Dirk Best
/***************************************************************************
LSI M-THREE
Models:
- M-THREE/100 (SA400, 5.25" single sided)
- M-THREE/110 (SA410, 5.25" single sided)
- M-THREE/150 (SA450, 5.25" double sided)
- M-THREE/160 (SA460, 5.25" double sided)
- M-THREE/200 (SA800, 8" single sided)
- M-THREE/250 (SA850, 8" double sided) [emulated by default]
- M-THREE/320 (SA800, 8" single sided, Winchester 5 MB)
- M-THREE/325 (SA850, 8" double sided, Winchester 5 MB)
- M-THREE/340 (SA800, 8" single sided, Winchester 10 MB)
- M-THREE/345 (SA850, 8" double sided, Winchester 10 MB)
Hardware:
- MK3880N-IRL (Z80)
- 64 KB RAM
- Z80 CTC
- 2x D8255AC PPI
- D8251A
- MC6845P CRTC
- FD1793 FDC
- XTAL X1 21.??? Mhz (unreadable)
- XTAL X2 16 MHz
- XTAL X3 4.9152 MHz
- Keyboard XTAL 6.1?? MHz (assumed to be 6.144 MHz)
TODO:
- Initial PC is currently hacked to f000
- Verify/fix floppy hookup
- Printer interface
- Buzzer
- Map the rest of the keys, verify existing keys
- Switch FDC to 1 MHz for 5.25" drives
Notes:
- Y to boot from floppy, ESC to enter monitor, any other key to
boot from IDE
***************************************************************************/
#include "emu.h"
#include "cpu/mcs48/mcs48.h"
#include "cpu/z80/z80.h"
#include "machine/z80ctc.h"
#include "machine/i8255.h"
#include "machine/i8251.h"
#include "machine/wd_fdc.h"
#include "video/mc6845.h"
#include "imagedev/floppy.h"
#include "bus/rs232/rs232.h"
#include "emupal.h"
#include "screen.h"
#include "softlist_dev.h"
namespace {
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
class m3_state : public driver_device
{
public:
m3_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag),
m_maincpu(*this, "maincpu"),
m_ctc(*this, "ctc"),
m_ppi(*this, "ppi%u", 0U),
m_chargen(*this, "chargen"),
m_vram(*this, "vram"),
m_palette(*this, "palette"),
m_fdc(*this, "fdc"),
m_floppy(*this, "fdc:%u", 0U),
m_kbdmcu(*this, "kbdmcu"),
m_special(*this, "SPECIAL"),
m_keys(*this, "K%02u", 0U)
{ }
void m3(machine_config &config);
protected:
virtual void machine_start() override ATTR_COLD;
virtual void machine_reset() override ATTR_COLD;
private:
required_device<z80_device> m_maincpu;
required_device<z80ctc_device> m_ctc;
required_device_array<i8255_device, 2> m_ppi;
required_region_ptr<uint8_t> m_chargen;
required_shared_ptr<uint8_t> m_vram;
required_device<palette_device> m_palette;
required_device<fd1793_device> m_fdc;
required_device_array<floppy_connector, 2> m_floppy;
required_device<i8035_device> m_kbdmcu;
required_ioport m_special;
required_ioport_array<16> m_keys;
void mem_map(address_map &map) ATTR_COLD;
void io_map(address_map &map) ATTR_COLD;
void kbd_mem_map(address_map &map) ATTR_COLD;
void kbd_io_map(address_map &map) ATTR_COLD;
int kbd_t0_r();
int kbd_t1_r();
uint8_t kbd_p1_r();
void kbd_p1_w(uint8_t data);
void kbd_p2_w(uint8_t data);
void kbd_data_w(uint8_t data);
int m_kbd_col = 0;
int m_kbd_row = 0;
uint8_t m_kbd_data = 0U;
void ppi2_pa_w(uint8_t data);
uint8_t ppi2_pb_r();
MC6845_UPDATE_ROW(crtc_update_row);
void fdc_intrq_w(int state);
void fdc_drq_w(int state);
uint8_t fdc_data_r(offs_t offset);
void fdc_data_w(offs_t offset, uint8_t data);
bool m_nmi_enabled = false;
bool m_nmi_taken = false;
};
//**************************************************************************
// ADDRESS MAPS
//**************************************************************************
void m3_state::mem_map(address_map &map)
{
map(0x0000, 0xe7ff).ram();
map(0xe800, 0xefff).ram().share("vram");
map(0xf000, 0xffff).rom().region("maincpu", 0);
}
void m3_state::io_map(address_map &map)
{
map.unmap_value_high();
map.global_mask(0xff);
map(0x80, 0x83).rw(m_ctc, FUNC(z80ctc_device::read), FUNC(z80ctc_device::write));
map(0x84, 0x84).rw("crtc", FUNC(mc6845_device::status_r), FUNC(mc6845_device::address_w));
map(0x85, 0x85).rw("crtc", FUNC(mc6845_device::register_r), FUNC(mc6845_device::register_w));
map(0x88, 0x88).rw(m_fdc, FUNC(fd1793_device::status_r), FUNC(fd1793_device::cmd_w));
map(0x89, 0x89).rw(m_fdc, FUNC(fd1793_device::track_r), FUNC(fd1793_device::track_w));
map(0x8a, 0x8a).rw(m_fdc, FUNC(fd1793_device::sector_r), FUNC(fd1793_device::sector_w));
map(0x8b, 0x8b).rw(FUNC(m3_state::fdc_data_r), FUNC(m3_state::fdc_data_w));
map(0x8c, 0x8d).rw("usart", FUNC(i8251_device::read), FUNC(i8251_device::write));
map(0x90, 0x93).rw(m_ppi[0], FUNC(i8255_device::read), FUNC(i8255_device::write));
map(0x94, 0x97).rw(m_ppi[1], FUNC(i8255_device::read), FUNC(i8255_device::write));
}
void m3_state::kbd_mem_map(address_map &map)
{
map(0x000, 0x7ff).rom().mirror(0x800).region("keyboard", 0);
}
void m3_state::kbd_io_map(address_map &map)
{
map(0x30, 0x30).mirror(0xf).w(FUNC(m3_state::kbd_data_w));
}
//**************************************************************************
// INPUT DEFINITIONS
//**************************************************************************
// unmapped keys:
//
// INIT PROG F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 F13 F14
// INS_CHAR DEL_CHAR INS_LINE DEL_LINE CLEAR_FORE CLEAR_PAGE PROT_MODE BLOCK_MODE
// SEND_LINE SEND_FORE SEND_PAGE PAGE_FWD UP PAGE_BACK LEFT HOME RIGHT
// BREAK SET_TAB DOWN CLEAR_TAB
static INPUT_PORTS_START( m3 )
PORT_START("SPECIAL")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_CAPSLOCK) PORT_CHAR(UCHAR_MAMEKEY(CAPSLOCK)) // or shift-lock?
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_LSHIFT) PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR(UCHAR_SHIFT_1)
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_LCONTROL) PORT_CODE(KEYCODE_RCONTROL) PORT_CHAR(UCHAR_SHIFT_2)
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_LALT) PORT_NAME("Repeat")
PORT_START("K00")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('&')
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_H) PORT_CHAR('h') PORT_CHAR('H')
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME(": (?)")
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("b4")
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("b3")
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Y) PORT_CHAR('y') PORT_CHAR('Y')
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("85")
PORT_START("K01")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('\'')
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_J) PORT_CHAR('j') PORT_CHAR('J')
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("0f")
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("b2")
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_9_PAD) PORT_CHAR(UCHAR_MAMEKEY(9_PAD))
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_U) PORT_CHAR('u') PORT_CHAR('U')
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("86")
PORT_START("K02")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('=')
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Z) PORT_CHAR('z') PORT_CHAR('Z')
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("05")
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("96")
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_2_PAD) PORT_CHAR(UCHAR_MAMEKEY(2_PAD))
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_P) PORT_CHAR('p') PORT_CHAR('P')
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("89")
PORT_START("K03")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_QUOTE) PORT_CHAR(';') PORT_CHAR('+')
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_X) PORT_CHAR('x') PORT_CHAR('X')
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("2 (?)")
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("95")
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_5_PAD) PORT_CHAR(UCHAR_MAMEKEY(5_PAD))
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('@') PORT_CHAR('`')
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("8a")
PORT_START("K04")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_COLON) PORT_CHAR(':') PORT_CHAR('*')
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_C) PORT_CHAR('c') PORT_CHAR('C')
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("11")
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("94")
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_8_PAD) PORT_CHAR(UCHAR_MAMEKEY(8_PAD))
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_TILDE) PORT_CHAR('^') PORT_CHAR('~')
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("8b")
PORT_START("K05")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("cd")
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_V) PORT_CHAR('v') PORT_CHAR('V')
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("93")
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_1_PAD) PORT_CHAR(UCHAR_MAMEKEY(1_PAD))
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(8)
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_BACKSLASH) PORT_CHAR('\\') PORT_CHAR('|') // actually ¦
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("8c")
PORT_START("K06")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<')
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_B) PORT_CHAR('b') PORT_CHAR('B')
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ')
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("92")
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_4_PAD) PORT_CHAR(UCHAR_MAMEKEY(4_PAD))
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_TAB) PORT_CHAR(9)
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('[') PORT_CHAR('{')
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("8d")
PORT_START("K07")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>')
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_N) PORT_CHAR('n') PORT_CHAR('N')
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_BACKSLASH2) PORT_CHAR('_')
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("91")
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_7_PAD) PORT_CHAR(UCHAR_MAMEKEY(7_PAD))
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_ENTER) PORT_CHAR('\r')
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("8e")
PORT_START("K08")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?')
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_M) PORT_CHAR('m') PORT_CHAR('M')
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_DEL) PORT_CHAR(UCHAR_MAMEKEY(DEL))
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("90")
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("bc")
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("LF") PORT_CHAR('\n')
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR(']') PORT_CHAR('}')
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("8f")
PORT_START("K09")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('(')
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_K) PORT_CHAR('k') PORT_CHAR('K')
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("cd")
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("b1")
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("b0")
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_I) PORT_CHAR('i') PORT_CHAR('I')
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("87")
PORT_START("K10")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR(')')
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_L) PORT_CHAR('l') PORT_CHAR('L')
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_0) PORT_CHAR('0')
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("97")
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_0_PAD) PORT_CHAR(UCHAR_MAMEKEY(0_PAD))
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_O) PORT_CHAR('o') PORT_CHAR('O')
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("88")
PORT_START("K11")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%')
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_G) PORT_CHAR('g') PORT_CHAR('G')
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("03")
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("b5")
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_6_PAD) PORT_CHAR(UCHAR_MAMEKEY(6_PAD))
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_T) PORT_CHAR('t') PORT_CHAR('T')
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("84")
PORT_START("K12")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$')
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F) PORT_CHAR('f') PORT_CHAR('F')
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("cd")
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("b7")
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("b6")
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_R) PORT_CHAR('r') PORT_CHAR('R')
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("83")
PORT_START("K13")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR(0xa3) // £
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_D) PORT_CHAR('d') PORT_CHAR('D')
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("ea")
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("b8")
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_3_PAD) PORT_CHAR(UCHAR_MAMEKEY(3_PAD))
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_E) PORT_CHAR('e') PORT_CHAR('E')
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("82")
PORT_START("K14")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('"')
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_S) PORT_CHAR('s') PORT_CHAR('S')
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("02")
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("ba")
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("b9")
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_W) PORT_CHAR('w') PORT_CHAR('W')
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("81")
PORT_START("K15")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!')
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_A) PORT_CHAR('a') PORT_CHAR('A')
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("c3")
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("bb")
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_COMMA_PAD) PORT_CHAR(UCHAR_MAMEKEY(DEL_PAD))
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_ESC) PORT_CHAR(UCHAR_MAMEKEY(ESC))
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Q) PORT_CHAR('q') PORT_CHAR('Q')
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("80")
INPUT_PORTS_END
int m3_state::kbd_t0_r()
{
// outputs 26 alternating 0 and 1 to i/o port 0x00 when active
return 1;
}
int m3_state::kbd_t1_r()
{
// checked right before outputing a new keycode
return 0;
}
uint8_t m3_state::kbd_p1_r()
{
uint8_t data = 0;
// ---4---- key down
// ----3--- repeat
// -----2-- control
// ------1- shift
// -------0 caps-lock, shift-lock?
data |= BIT(m_keys[m_kbd_col]->read(), m_kbd_row) ? 0x00 : 0x10;
data |= m_special->read();
return data;
}
void m3_state::kbd_p1_w(uint8_t data)
{
// 765----- row select
m_kbd_row = data >> 5;
}
void m3_state::kbd_p2_w(uint8_t data)
{
// 7654---- column select
// ----3210 unused
m_kbd_col = data >> 4;
}
void m3_state::kbd_data_w(uint8_t data)
{
m_kbd_data = data;
m_ppi[1]->pc2_w(0);
m_ppi[1]->pc2_w(1);
}
//**************************************************************************
// VIDEO EMULATION
//**************************************************************************
MC6845_UPDATE_ROW( m3_state::crtc_update_row )
{
rgb_t const *const pen = m_palette->palette()->entry_list_raw();
for (uint16_t x = 0; x < x_count; x++)
{
uint16_t mem = (ma + x) & 0x7ff;
uint8_t chr = m_vram[mem];
uint8_t gfx = m_chargen[((chr << 4) | ra) & 0x7ff];
// invert?
if (BIT(chr, 7))
gfx ^= 0xff;
// cursor?
if (x == cursor_x)
gfx ^= 0xff;
// draw 7 pixels of the character
for (int i = 0; i < 7; i++)
bitmap.pix(y, x * 7 + i) = pen[BIT(gfx, 6 - i)];
}
}
static const gfx_layout charlayout =
{
7, 10,
RGN_FRAC(1,1),
1,
{ 0 },
{ 1, 2, 3, 4, 5, 6, 7 },
{ 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8, 8*8, 9*8 },
8*16
};
static GFXDECODE_START(chars)
GFXDECODE_ENTRY("chargen", 0, charlayout, 0, 1)
GFXDECODE_END
//**************************************************************************
// MACHINE EMULATION
//**************************************************************************
void m3_state::fdc_intrq_w(int state)
{
if (state)
{
m_maincpu->set_input_line(Z80_INPUT_LINE_WAIT, CLEAR_LINE);
m_nmi_taken = false;
}
m_ctc->trg1(state);
}
void m3_state::fdc_drq_w(int state)
{
if (state)
{
m_maincpu->set_input_line(Z80_INPUT_LINE_WAIT, CLEAR_LINE);
if (m_nmi_enabled)
{
m_maincpu->pulse_input_line(INPUT_LINE_NMI, attotime::zero);
m_nmi_enabled = false;
m_nmi_taken = true;
}
}
}
uint8_t m3_state::fdc_data_r(offs_t offset)
{
if (m_nmi_taken && m_fdc->drq_r() == 0)
{
m_maincpu->set_input_line(Z80_INPUT_LINE_WAIT, ASSERT_LINE);
m_maincpu->retry_access();
return 0;
}
return m_fdc->data_r();
}
void m3_state::fdc_data_w(offs_t offset, uint8_t data)
{
if (m_nmi_taken && m_fdc->drq_r() == 0)
{
m_maincpu->set_input_line(Z80_INPUT_LINE_WAIT, ASSERT_LINE);
m_maincpu->retry_access();
}
m_fdc->data_w(data);
}
void m3_state::ppi2_pa_w(uint8_t data)
{
floppy_image_device *floppy = nullptr;
// 7------- not used?
// -6------ buzzer
// --5----- not used?
// ---4---- nmi enable
// ----3--- unknown
// -----2-- floppy side
// ------10 drive select
logerror("ppi2_pa_w: %02x\n", data);
if (!BIT(data, 0) && m_floppy[0])
floppy = m_floppy[0]->get_device();
else if (!BIT(data, 1) && m_floppy[1])
floppy = m_floppy[1]->get_device();
m_fdc->set_floppy(floppy);
if (floppy)
floppy->ss_w(BIT(data, 2));
m_nmi_enabled = bool(BIT(~data, 4));
}
uint8_t m3_state::ppi2_pb_r()
{
return m_kbd_data;
}
void m3_state::machine_start()
{
// register for save states
save_item(NAME(m_kbd_col));
save_item(NAME(m_kbd_row));
save_item(NAME(m_kbd_data));
save_item(NAME(m_nmi_enabled));
save_item(NAME(m_nmi_taken));
}
void m3_state::machine_reset()
{
m_maincpu->set_pc(0xf000);
m_nmi_enabled = false;
m_nmi_taken = false;
}
//**************************************************************************
// MACHINE DEFINTIONS
//**************************************************************************
static const z80_daisy_config daisy_chain[] =
{
{ "ctc" },
{ nullptr }
};
static DEVICE_INPUT_DEFAULTS_START( rs232_defaults )
DEVICE_INPUT_DEFAULTS( "RS232_TXBAUD", 0xff, RS232_BAUD_9600 )
DEVICE_INPUT_DEFAULTS( "RS232_RXBAUD", 0xff, RS232_BAUD_9600 )
DEVICE_INPUT_DEFAULTS( "RS232_DATABITS", 0xff, RS232_DATABITS_7 )
DEVICE_INPUT_DEFAULTS( "RS232_PARITY", 0xff, RS232_PARITY_EVEN )
DEVICE_INPUT_DEFAULTS( "RS232_STOPBITS", 0xff, RS232_STOPBITS_1 )
DEVICE_INPUT_DEFAULTS_END
static void m3_floppies(device_slot_interface &device)
{
device.option_add("sa400", FLOPPY_525_SSSD_35T);
device.option_add("sa410", FLOPPY_525_SSQD);
device.option_add("sa450", FLOPPY_525_DD);
device.option_add("sa460", FLOPPY_525_QD);
device.option_add("sa800", FLOPPY_8_SSDD);
device.option_add("sa850", FLOPPY_8_DSDD);
}
void m3_state::m3(machine_config &config)
{
Z80(config, m_maincpu, 4.9152_MHz_XTAL / 2);
m_maincpu->set_addrmap(AS_PROGRAM, &m3_state::mem_map);
m_maincpu->set_addrmap(AS_IO, &m3_state::io_map);
m_maincpu->set_daisy_config(daisy_chain);
Z80CTC(config, m_ctc, 0); // unknown clock
m_ctc->intr_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ0);
m_ctc->set_clk<0>(4.9152_MHz_XTAL / 4);
m_ctc->zc_callback<0>().set("usart", FUNC(i8251_device::write_txc));
m_ctc->zc_callback<0>().append("usart", FUNC(i8251_device::write_rxc));
I8255(config, m_ppi[0]);
I8255(config, m_ppi[1]);
m_ppi[1]->out_pa_callback().set(FUNC(m3_state::ppi2_pa_w));
m_ppi[1]->in_pb_callback().set(FUNC(m3_state::ppi2_pb_r));
i8251_device &usart(I8251(config, "usart", 0)); // unknown clock
usart.txd_handler().set("rs232", FUNC(rs232_port_device::write_txd));
usart.rts_handler().set("rs232", FUNC(rs232_port_device::write_rts));
usart.dtr_handler().set("rs232", FUNC(rs232_port_device::write_dtr));
rs232_port_device &rs232(RS232_PORT(config, "rs232", default_rs232_devices, nullptr));
rs232.set_option_device_input_defaults("printer", DEVICE_INPUT_DEFAULTS_NAME(rs232_defaults));
rs232.rxd_handler().set("usart", FUNC(i8251_device::write_rxd));
rs232.dsr_handler().set("usart", FUNC(i8251_device::write_dsr));
rs232.cts_handler().set("usart", FUNC(i8251_device::write_cts));
// video hardware
screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER, rgb_t::green()));
screen.set_raw(21'840'000 / 2, 707, 0, 560, 309, 0, 240); // unknown clock, hand-tuned to ~50 fps
screen.set_screen_update("crtc", FUNC(mc6845_device::screen_update));
GFXDECODE(config, "gfxdecode", m_palette, chars);
PALETTE(config, m_palette, palette_device::MONOCHROME);
mc6845_device &crtc(MC6845(config, "crtc", 21'840'000 / 2 / 7)); // unknown clock
crtc.set_screen("screen");
crtc.set_show_border_area(false);
crtc.set_char_width(7);
crtc.set_update_row_callback(FUNC(m3_state::crtc_update_row));
crtc.out_vsync_callback().set(m_ctc, FUNC(z80ctc_device::trg2));
// floppy
FD1793(config, m_fdc, 16_MHz_XTAL / 8);
m_fdc->intrq_wr_callback().set(FUNC(m3_state::fdc_intrq_w));
m_fdc->drq_wr_callback().set(FUNC(m3_state::fdc_drq_w));
FLOPPY_CONNECTOR(config, "fdc:0", m3_floppies, "sa850", floppy_image_device::default_mfm_floppy_formats);
FLOPPY_CONNECTOR(config, "fdc:1", m3_floppies, "sa850", floppy_image_device::default_mfm_floppy_formats);
SOFTWARE_LIST(config, "floppy_list").set_original("m3");
// keyboard
I8035(config, m_kbdmcu, 6.144_MHz_XTAL);
m_kbdmcu->set_addrmap(AS_PROGRAM, &m3_state::kbd_mem_map);
m_kbdmcu->set_addrmap(AS_IO, &m3_state::kbd_io_map);
m_kbdmcu->p1_in_cb().set(FUNC(m3_state::kbd_p1_r));
m_kbdmcu->p1_out_cb().set(FUNC(m3_state::kbd_p1_w));
m_kbdmcu->p2_out_cb().set(FUNC(m3_state::kbd_p2_w));
m_kbdmcu->t0_in_cb().set(FUNC(m3_state::kbd_t0_r));
m_kbdmcu->t1_in_cb().set(FUNC(m3_state::kbd_t1_r));
}
//**************************************************************************
// ROM DEFINITIONS
//**************************************************************************
ROM_START( m3 )
ROM_REGION(0x1000, "maincpu", 0)
ROM_LOAD("bootstrap_prom_034.bin", 0x0000, 0x0800, CRC(7fdb051e) SHA1(7aa24d4f44b6a0c8f7f647667f4997432c186cac))
// Homebrew Monitor ROM, written by Steve Hunt. Uses the socket of the HDD ROM.
ROM_LOAD("monitor_prom_v19_2017-07-05.bin", 0x0800, 0x0800, CRC(0608848f) SHA1(9a82cb49056ff1a1d53ce2bd026537a6914a4847))
ROM_REGION(0x800, "chargen", 0)
ROM_LOAD("6845crt_font_prom_033.bin", 0x000, 0x800, CRC(cc29f664) SHA1(4197530d9455d665fd4773f95bb6394f6b056dec))
ROM_REGION(0x800, "keyboard", 0)
ROM_LOAD("keyboard_prom_032.bin", 0x000, 0x800, CRC(21548355) SHA1(ee4ce4af9c78474263dd58e0f19e79e5b00926fa))
ROM_END
} // anonymous namespace
//**************************************************************************
// SYSTEM DRIVERS
//**************************************************************************
// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS
COMP( 1982, m3, 0, 0, m3, m3, m3_state, empty_init, "LSI", "M-THREE", MACHINE_NOT_WORKING | MACHINE_NO_SOUND | MACHINE_SUPPORTS_SAVE )
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