// 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 (CPU needs to be overclocked?) - Printer interface - Buzzer - Map the rest of the keys, verify existing keys - Switch FDC to 1 MHz for 5.25" drives Notes: - No offical software available, but a custom version of CP/M - 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" 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; virtual void machine_reset() override; private: required_device m_maincpu; required_device m_ctc; required_device_array m_ppi; required_region_ptr m_chargen; required_shared_ptr m_vram; required_device m_palette; required_device m_fdc; required_device_array m_floppy; required_device m_kbdmcu; required_ioport m_special; required_ioport_array<16> m_keys; void mem_map(address_map &map); void io_map(address_map &map); void kbd_mem_map(address_map &map); void kbd_io_map(address_map &map); 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_taken = 0; }; //************************************************************************** // 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_nmi_taken = false; m_maincpu->set_input_line(INPUT_LINE_HALT, CLEAR_LINE); } m_ctc->trg1(state); } void m3_state::fdc_drq_w(int state) { if (state) m_maincpu->set_input_line(INPUT_LINE_HALT, CLEAR_LINE); if (state && !m_nmi_taken) { m_nmi_taken = true; m_maincpu->pulse_input_line(INPUT_LINE_NMI, attotime::zero); } } uint8_t m3_state::fdc_data_r(offs_t offset) { if ((m_fdc->drq_r() == 0) && m_nmi_taken) { // cpu tries to read data without drq, halt it and reset pc m_maincpu->set_input_line(INPUT_LINE_HALT, ASSERT_LINE); m_maincpu->set_state_int(Z80_PC, m_maincpu->state_int(Z80_PC) - 2); return 0; } return m_fdc->data_r(); } void m3_state::fdc_data_w(offs_t offset, uint8_t data) { if ((m_fdc->drq_r() == 0) && m_nmi_taken) { // cpu tries to write data without drq, halt it and reset pc m_maincpu->set_input_line(INPUT_LINE_HALT, ASSERT_LINE); m_maincpu->set_state_int(Z80_PC, m_maincpu->state_int(Z80_PC) - 2); return; } 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---- unknown (motor?) // ----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)); } 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_taken)); } void m3_state::machine_reset() { m_maincpu->set_pc(0xf000); m_nmi_taken = false; // floppy motor is always on if (m_floppy[0]) m_floppy[0]->get_device()->mon_w(0); if (m_floppy[1]) m_floppy[1]->get_device()->mon_w(0); } //************************************************************************** // 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_clock_scale(1.2f); // needs to be overclocked or its too slow for the floppy 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); // 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 )