// license:MAME // copyright-holders:Robbbert /*************************************************************************** Vegas 6809 Skeleton driver Devices: MC6809 cpu MC6840 timer MM58174 RTC MB8876 (or FD1791) FDC SY6545-1 CRTC 2x MC6821 PIA 2x MC6850 ACIA Memory ranges: 0000-EFFF RAM F000-F7FF Devices F800-FFFF ROM Monitor commands: D boot from floppy (launch Flex OS) F relaunch Flex G go M modify memory (. to exit) ToDo: - Colours (Looks like characters 0xc0-0xff produce coloured lores gfx). - Connect the RTC interrupt pin (not supported currently) - Find the missing character generator rom. - Enable sound, when what seems to be a 6840 bug is fixed. - Schematic is almost useless, riddled with omissions and errors. All documents are in French, so no help there. The parts list only has half of the parts. - Need software ****************************************************************************/ #include "emu.h" #include "cpu/m6809/m6809.h" #include "machine/6821pia.h" #include "machine/6840ptm.h" #include "machine/clock.h" #include "video/mc6845.h" #include "machine/6850acia.h" #include "machine/mm58274c.h" #include "machine/keyboard.h" #include "sound/speaker.h" #include "machine/wd_fdc.h" #define KEYBOARD_TAG "keyboard" class v6809_state : public driver_device { public: v6809_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag), m_video_address(0), m_pia0(*this, "pia0"), m_maincpu(*this, "maincpu"), m_crtc(*this, "crtc"), m_fdc(*this, "fdc"), m_floppy0(*this, "fdc:0"), m_speaker(*this, "speaker"), m_acia0(*this, "acia0"), m_acia1(*this, "acia1"), m_palette(*this, "palette") { } DECLARE_WRITE_LINE_MEMBER(speaker_en_w); DECLARE_WRITE_LINE_MEMBER(speaker_w); DECLARE_READ8_MEMBER(pb_r); DECLARE_WRITE8_MEMBER(pa_w); DECLARE_WRITE8_MEMBER(videoram_w); DECLARE_WRITE8_MEMBER(v6809_address_w); DECLARE_WRITE8_MEMBER(v6809_register_w); DECLARE_WRITE8_MEMBER(kbd_put); DECLARE_WRITE_LINE_MEMBER(write_acia_clock); DECLARE_MACHINE_RESET(v6809); UINT8 *m_p_videoram; const UINT8 *m_p_chargen; UINT16 m_video_address; private: bool m_speaker_en; UINT8 m_video_index; UINT8 m_term_data; UINT8 m_vidbyte; required_device m_pia0; required_device m_maincpu; required_device m_crtc; required_device m_fdc; required_device m_floppy0; required_device m_speaker; required_device m_acia0; required_device m_acia1; public: required_device m_palette; }; static ADDRESS_MAP_START(v6809_mem, AS_PROGRAM, 8, v6809_state) ADDRESS_MAP_UNMAP_HIGH AM_RANGE(0x0000, 0xefff) AM_RAM AM_RANGE(0xf000, 0xf000) AM_MIRROR(0xfe) AM_DEVREAD("crtc", mc6845_device, status_r) AM_WRITE(v6809_address_w) AM_RANGE(0xf001, 0xf001) AM_MIRROR(0xfe) AM_DEVREAD("crtc", mc6845_device, register_r) AM_WRITE(v6809_register_w) AM_RANGE(0xf200, 0xf200) AM_MIRROR(0xff) AM_WRITE(videoram_w) AM_RANGE(0xf504, 0xf504) AM_MIRROR(0x36) AM_DEVREADWRITE("acia0", acia6850_device, status_r, control_w) // modem AM_RANGE(0xf505, 0xf505) AM_MIRROR(0x36) AM_DEVREADWRITE("acia0", acia6850_device, data_r, data_w) AM_RANGE(0xf50c, 0xf50c) AM_MIRROR(0x36) AM_DEVREADWRITE("acia1", acia6850_device, status_r, control_w) // printer AM_RANGE(0xf50d, 0xf50d) AM_MIRROR(0x36) AM_DEVREADWRITE("acia1", acia6850_device, data_r, data_w) AM_RANGE(0xf600, 0xf603) AM_MIRROR(0x3c) AM_DEVREADWRITE("fdc", mb8876_t, read, write) AM_RANGE(0xf640, 0xf64f) AM_MIRROR(0x30) AM_DEVREADWRITE("rtc", mm58274c_device, read, write) AM_RANGE(0xf680, 0xf683) AM_MIRROR(0x3c) AM_DEVREADWRITE("pia0", pia6821_device, read, write) AM_RANGE(0xf6c8, 0xf6cf) AM_MIRROR(0x08) AM_DEVREADWRITE("ptm", ptm6840_device, read, write) AM_RANGE(0xf6d0, 0xf6d3) AM_MIRROR(0x0c) AM_DEVREADWRITE("pia1", pia6821_device, read, write) AM_RANGE(0xf800, 0xffff) AM_ROM ADDRESS_MAP_END static ADDRESS_MAP_START(v6809_io, AS_PROGRAM, 8, v6809_state) AM_RANGE(0x0064, 0x0064) AM_WRITENOP ADDRESS_MAP_END /* Input ports */ static INPUT_PORTS_START( v6809 ) INPUT_PORTS_END MACHINE_RESET_MEMBER( v6809_state, v6809) { m_p_chargen = memregion("chargen")->base(); m_p_videoram = memregion("videoram")->base(); m_term_data = 0; m_pia0->cb1_w(1); } // **** Video **** /* F4 Character Displayer */ static const gfx_layout v6809_charlayout = { 8, 10, /* 8 x 10 characters */ 256, /* 128 characters */ 1, /* 1 bits per pixel */ { 0 }, /* no bitplanes */ /* x offsets */ { 0, 1, 2, 3, 4, 5, 6, 7 }, /* y offsets */ { 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8, 8*8, 9*8 }, 8*16 /* every char takes 16 bytes */ }; static GFXDECODE_START( v6809 ) GFXDECODE_ENTRY( "chargen", 0x0000, v6809_charlayout, 0, 1 ) GFXDECODE_END MC6845_UPDATE_ROW( v6809_update_row ) { v6809_state *state = device->machine().driver_data(); const rgb_t *palette = state->m_palette->palette()->entry_list_raw(); UINT8 chr,gfx; UINT16 mem,x; UINT32 *p = &bitmap.pix32(y); for (x = 0; x < x_count; x++) { mem = (ma + x) & 0x7ff; chr = state->m_p_videoram[mem]; gfx = state->m_p_chargen[(chr<<4) | ra] ^ ((x == cursor_x) ? 0xff : 0); /* Display a scanline of a character (8 pixels) */ *p++ = palette[BIT(gfx, 7)]; *p++ = palette[BIT(gfx, 6)]; *p++ = palette[BIT(gfx, 5)]; *p++ = palette[BIT(gfx, 4)]; *p++ = palette[BIT(gfx, 3)]; *p++ = palette[BIT(gfx, 2)]; *p++ = palette[BIT(gfx, 1)]; *p++ = palette[BIT(gfx, 0)]; } } MC6845_ON_UPDATE_ADDR_CHANGED( v6809_update_addr ) { /* not sure what goes in here - parameters passed are device, address, strobe */ v6809_state *state = device->machine().driver_data(); state->m_video_address = address & 0x7ff; } static MC6845_INTERFACE( v6809_crtc ) { false, 0,0,0,0, /* visarea adjustment */ 8, /* number of dots per character */ NULL, v6809_update_row, /* handler to display a scanline */ NULL, DEVCB_NULL, DEVCB_NULL, DEVCB_NULL, DEVCB_NULL, v6809_update_addr /* handler to process transparent mode */ }; WRITE8_MEMBER( v6809_state::videoram_w ) { m_vidbyte = data; } WRITE8_MEMBER( v6809_state::v6809_address_w ) { m_crtc->address_w( space, 0, data ); m_video_index = data & 0x1f; if (m_video_index == 31) m_p_videoram[m_video_address] = m_vidbyte; } WRITE8_MEMBER( v6809_state::v6809_register_w ) { UINT16 temp = m_video_address; m_crtc->register_w( space, 0, data ); // Get transparent address if (m_video_index == 18) m_video_address = ((data & 7) << 8 ) | (temp & 0xff); else if (m_video_index == 19) m_video_address = data | (temp & 0xff00); } // **** Keyboard **** WRITE8_MEMBER( v6809_state::kbd_put ) { m_term_data = data; m_pia0->cb1_w(0); m_pia0->cb1_w(1); } WRITE_LINE_MEMBER( v6809_state::write_acia_clock ) { m_acia0->write_txc(state); m_acia0->write_rxc(state); m_acia1->write_txc(state); m_acia1->write_rxc(state); } READ8_MEMBER( v6809_state::pb_r ) { UINT8 ret = m_term_data; m_term_data = 0; return ret; } // can support 4 drives WRITE8_MEMBER( v6809_state::pa_w ) { floppy_image_device *floppy = NULL; if ((data & 3) == 0) floppy = m_floppy0->get_device(); //if ((data & 3) == 1) floppy = m_floppy1->get_device(); //if ((data & 3) == 2) floppy = m_floppy2->get_device(); //if ((data & 3) == 3) floppy = m_floppy3->get_device(); m_fdc->set_floppy(floppy); // Bits 2 and 3 go to the floppy connector but are not documented if (floppy) { floppy->mon_w(0); m_fdc->dden_w(BIT(data, 4)); } } // this should output 1 to enable sound, then output 0 after a short time // however it continuously outputs 1 WRITE_LINE_MEMBER( v6809_state::speaker_en_w ) { m_speaker_en = state; } WRITE_LINE_MEMBER( v6809_state::speaker_w ) { // if (m_speaker_en) // m_speaker->level_w(state); } static const ptm6840_interface mc6840_intf = { XTAL_16MHz / 4, { 4000000/14, 4000000/14, 4000000/14/8 }, { DEVCB_NULL, DEVCB_DRIVER_LINE_MEMBER(v6809_state, speaker_w), DEVCB_DRIVER_LINE_MEMBER(v6809_state, speaker_en_w) }, DEVCB_CPU_INPUT_LINE("maincpu", M6809_IRQ_LINE) }; static SLOT_INTERFACE_START( v6809_floppies ) SLOT_INTERFACE( "525dd", FLOPPY_525_DD ) SLOT_INTERFACE_END //------------------------------------------------- // mm58274c_interface rtc_intf //------------------------------------------------- // this is all guess static const mm58274c_interface rtc_intf = { 0, /* mode 24*/ 1 /* first day of week */ }; // *** Machine **** static MACHINE_CONFIG_START( v6809, v6809_state ) /* basic machine hardware */ MCFG_CPU_ADD("maincpu", M6809, XTAL_16MHz / 4) MCFG_CPU_PROGRAM_MAP(v6809_mem) MCFG_CPU_IO_MAP(v6809_io) MCFG_MACHINE_RESET_OVERRIDE(v6809_state, v6809) /* video hardware */ MCFG_SCREEN_ADD("screen", RASTER) MCFG_SCREEN_REFRESH_RATE(50) MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */ MCFG_SCREEN_SIZE(640, 480) MCFG_SCREEN_VISIBLE_AREA(0, 640-1, 0, 480-1) MCFG_SCREEN_UPDATE_DEVICE("crtc", sy6545_1_device, screen_update) MCFG_PALETTE_ADD_BLACK_AND_WHITE("palette") MCFG_GFXDECODE_ADD("gfxdecode", "palette", v6809) /* sound hardware */ MCFG_SPEAKER_STANDARD_MONO("mono") MCFG_SOUND_ADD("speaker", SPEAKER_SOUND, 0) MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50) /* Devices */ MCFG_MC6845_ADD("crtc", SY6545_1, "screen", XTAL_16MHz / 8, v6809_crtc) MCFG_DEVICE_ADD(KEYBOARD_TAG, GENERIC_KEYBOARD, 0) MCFG_GENERIC_KEYBOARD_CB(WRITE8(v6809_state, kbd_put)) // port A = drive select and 2 control lines ; port B = keyboard // CB2 connects to the interrupt pin of the RTC (the rtc code doesn't support it) MCFG_DEVICE_ADD("pia0", PIA6821, 0) MCFG_PIA_READPB_HANDLER(READ8(v6809_state, pb_r)) MCFG_PIA_WRITEPA_HANDLER(WRITE8(v6809_state, pa_w)) MCFG_PIA_IRQA_HANDLER(DEVWRITELINE("maincpu", m6809_device, irq_line)) MCFG_PIA_IRQB_HANDLER(DEVWRITELINE("maincpu", m6809_device, irq_line)) // no idea what this does MCFG_DEVICE_ADD("pia1", PIA6821, 0) MCFG_PIA_IRQA_HANDLER(DEVWRITELINE("maincpu", m6809_device, irq_line)) MCFG_PIA_IRQB_HANDLER(DEVWRITELINE("maincpu", m6809_device, irq_line)) MCFG_PTM6840_ADD("ptm", mc6840_intf) MCFG_DEVICE_ADD("acia0", ACIA6850, 0) MCFG_DEVICE_ADD("acia1", ACIA6850, 0) MCFG_DEVICE_ADD("acia_clock", CLOCK, 10) MCFG_CLOCK_SIGNAL_HANDLER(WRITELINE(v6809_state, write_acia_clock)) MCFG_MM58274C_ADD("rtc", rtc_intf) MCFG_MB8876x_ADD("fdc", XTAL_16MHz / 16) MCFG_FLOPPY_DRIVE_ADD("fdc:0", v6809_floppies, "525dd", floppy_image_device::default_floppy_formats) MACHINE_CONFIG_END /* ROM definition */ ROM_START( v6809 ) ROM_REGION( 0x10000, "maincpu", 0 ) ROM_LOAD( "v6809.rom", 0xf800, 0x0800, CRC(54bf5f32) SHA1(10d1d70f0b51e2b90e5c29249d3eab4c6b0033a1) ) ROM_REGION( 0x800, "videoram", ROMREGION_ERASE00 ) /* character generator not dumped, using the one from 'h19' for now */ ROM_REGION( 0x1000, "chargen", 0 ) ROM_LOAD( "2716_444-29_h19font.bin", 0x0000, 0x0800, BAD_DUMP CRC(d595ac1d) SHA1(130fb4ea8754106340c318592eec2d8a0deaf3d0)) ROM_RELOAD(0x0800, 0x0800) ROM_END /* Driver */ /* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */ COMP( 1982, v6809, 0, 0, v6809, v6809, driver_device, 0, "Microkit", "Vegas 6809", GAME_NOT_WORKING )