diff options
Diffstat (limited to 'src')
-rw-r--r-- | src/mame/drivers/bigbord2.cpp | 390 |
1 files changed, 222 insertions, 168 deletions
diff --git a/src/mame/drivers/bigbord2.cpp b/src/mame/drivers/bigbord2.cpp index 88af1c08601..8c938c3500d 100644 --- a/src/mame/drivers/bigbord2.cpp +++ b/src/mame/drivers/bigbord2.cpp @@ -2,16 +2,16 @@ // copyright-holders:Robbbert /*************************************************************************** - Big Board 2 +Ferguson / Digital Research Computers Big Board II - 12/05/2009 Skeleton driver. +2009-05-12 Skeleton driver. - This is very much under construction. +This is very much under construction. - Despite the name, this is not like the xerox or bigboard at all. +Despite the name, this is not like the xerox or bigboard at all. - It is compatible only if the software uses the same published - calls to the bios. Everything else is different. +It is compatible only if the software uses the same published +calls to the bios. Everything else is different. 80 = sio ce 84 = ctca ce @@ -29,14 +29,6 @@ dc = 6845 ce Difficulties encountered: -CTCA controls a pair of vectored interrupts. -One is triggered by a keypress, the other by a vsync pulse.. -Once a key is pressed, CTCA continually issues a keyboard interrupt, -causing a complete freeze. Therefore CTCA has been isolated, and the -2 interrupts are triggered by a hack. It isn't a very good hack, -because the system crashes after a while. However it will allow -testing and development to continue. - The FDC has a INTRQ pin, the diagram says it goes to page 6, but it just vanishes instead. @@ -54,12 +46,10 @@ The switching from port C8 is emulated. ToDo: - Finish floppy disk support (i have no boot disk) -- Finish the DMA switch in portcc_w. -- Fix the above problems with the CTC. -- Finish connecting up the SIO, when it becomes usable. -- Connect up the SASI, Centronics and other interfaces on ports D8-DB. -- Connect up the programming port C0-C3. -- Connect up the numerous board jumpers. +- (optional) Connect SIO to RS232. +- (optional) Connect up the SASI, Centronics and other interfaces on ports D8-DB. +- (optional) Connect up the programming port C0-C3. +- (optional) Connect up the numerous board jumpers. - Need software Monitor commands: @@ -84,63 +74,67 @@ X - change banks #include "cpu/z80/z80.h" #include "cpu/z80/z80daisy.h" #include "machine/z80ctc.h" -#include "machine/z80dart.h" +#include "machine/z80sio.h" #include "machine/z80dma.h" #include "video/mc6845.h" #include "machine/keyboard.h" #include "sound/beep.h" #include "machine/wd_fdc.h" +#include "machine/clock.h" -#define SCREEN_TAG "screen" -#define KEYBOARD_TAG "keyboard" -#define Z80_TAG "u39" -#define Z80SIO_TAG "u16" -#define Z80CTCA_TAG "u37" -#define Z80CTCB_TAG "u21" -#define Z80DMA_TAG "u62" class bigbord2_state : public driver_device { public: bigbord2_state(const machine_config &mconfig, device_type type, const char *tag) - : driver_device(mconfig, type, tag), - m_maincpu(*this, Z80_TAG), - m_6845(*this, "crtc"), - m_ctca(*this, Z80CTCA_TAG), - m_ctcb(*this, Z80CTCB_TAG), - m_dma(*this, Z80DMA_TAG), - m_fdc(*this, "fdc"), - m_floppy0(*this, "fdc:0"), - m_floppy1(*this, "fdc:1"), - m_beeper(*this, "beeper"), - m_dsw(*this, "DSW"), - m_bankr(*this, "bankr"), - m_bankv(*this, "bankv"), - m_banka(*this, "banka"), - m_palette(*this, "palette") + : driver_device(mconfig, type, tag) + , m_palette(*this, "palette") + , m_maincpu(*this, "maincpu") + , m_ctc1(*this, "ctc1") + , m_ctc2(*this, "ctc2") + , m_sio(*this, "sio") + , m_dma(*this, "dma") + , m_fdc(*this, "fdc") + , m_floppy0(*this, "fdc:0") + , m_floppy1(*this, "fdc:1") + , m_beeper(*this, "beeper") + , m_dsw(*this, "DSW") + , m_bankr(*this, "bankr") + , m_bankv(*this, "bankv") + , m_banka(*this, "banka") { } + DECLARE_WRITE8_MEMBER(portc0_w ); DECLARE_WRITE8_MEMBER(portc8_w ); DECLARE_WRITE8_MEMBER(portcc_w ); DECLARE_READ8_MEMBER(portc4_r); DECLARE_READ8_MEMBER(portd0_r); - DECLARE_WRITE8_MEMBER(bigbord2_kbd_put); - DECLARE_WRITE_LINE_MEMBER(frame); + DECLARE_WRITE8_MEMBER(kbd_put); + DECLARE_WRITE_LINE_MEMBER(clock_w); + DECLARE_WRITE_LINE_MEMBER(busreq_w); + DECLARE_WRITE_LINE_MEMBER(ctc_z1_w); + DECLARE_WRITE_LINE_MEMBER(sio_wrdya_w); + DECLARE_WRITE_LINE_MEMBER(sio_wrdyb_w); + DECLARE_WRITE_LINE_MEMBER(fdc_drq_w); DECLARE_DRIVER_INIT(bigbord2); - TIMER_DEVICE_CALLBACK_MEMBER(ctc_tick); DECLARE_READ8_MEMBER(memory_read_byte); DECLARE_WRITE8_MEMBER(memory_write_byte); DECLARE_READ8_MEMBER(io_read_byte); DECLARE_WRITE8_MEMBER(io_write_byte); MC6845_UPDATE_ROW(crtc_update_row); + required_device<palette_device> m_palette; + +private: + UINT8 crt8002(UINT8 ac_ra, UINT8 ac_chr, UINT8 ac_attr, UINT16 ac_cnt, bool ac_curs); UINT8 *m_p_chargen; /* character ROM */ UINT8 *m_p_videoram; /* Video RAM */ UINT8 *m_p_attribram; /* Attribute RAM */ -private: UINT8 m_term_data; UINT8 m_term_status; - int m_c8[8]; + UINT16 m_cnt; + bool m_c8[8]; + bool m_cc[8]; floppy_image_device *m_floppy; virtual void machine_start() override; virtual void machine_reset() override; @@ -148,9 +142,9 @@ private: address_space *m_mem; address_space *m_io; required_device<cpu_device> m_maincpu; - required_device<mc6845_device> m_6845; - required_device<z80ctc_device> m_ctca; - required_device<z80ctc_device> m_ctcb; + required_device<z80ctc_device> m_ctc1; + required_device<z80ctc_device> m_ctc2; + required_device<z80sio_device> m_sio; required_device<z80dma_device> m_dma; required_device<mb8877_t> m_fdc; required_device<floppy_connector> m_floppy0; @@ -160,10 +154,13 @@ private: required_memory_bank m_bankr; required_memory_bank m_bankv; required_memory_bank m_banka; -public: - required_device<palette_device> m_palette; }; +// Eprom programming port +WRITE8_MEMBER( bigbord2_state::portc0_w ) +{ +} + /* Status port 0 = RXDA 1 = RXDB @@ -190,49 +187,59 @@ READ8_MEMBER( bigbord2_state::portd0_r ) return ret; } -WRITE8_MEMBER( bigbord2_state::bigbord2_kbd_put ) +WRITE8_MEMBER( bigbord2_state::kbd_put ) { if (data) { m_term_data = data; m_term_status = 8; - m_ctca->trg0(0); - m_ctca->trg0(1); - if (m_mem->read_byte(0xf13d) == 0x4d) - { - // simulate interrupt by saving current pc on - // the stack and jumping to interrupt handler. - UINT16 spreg = m_maincpu->state_int(Z80_SP); - UINT16 pcreg = m_maincpu->state_int(Z80_PC); - spreg--; - m_mem->write_byte(spreg, pcreg >> 8); - spreg--; - m_mem->write_byte(spreg, pcreg); - m_maincpu->set_state_int(Z80_SP, spreg); - m_maincpu->set_state_int(Z80_PC, 0xF120); - } + m_ctc1->trg0(0); + m_ctc1->trg0(1); } } +WRITE_LINE_MEMBER( bigbord2_state::sio_wrdya_w ) +{ + m_cc[0] = state; +} + +WRITE_LINE_MEMBER( bigbord2_state::sio_wrdyb_w ) +{ + m_cc[1] = state; +} + +WRITE_LINE_MEMBER( bigbord2_state::fdc_drq_w ) +{ + m_cc[2] = state; +} + + /* Z80 DMA */ -READ8_MEMBER(bigbord2_state::memory_read_byte) +WRITE_LINE_MEMBER( bigbord2_state::busreq_w ) +{ +// since our Z80 has no support for BUSACK, we assume it is granted immediately + m_maincpu->set_input_line(Z80_INPUT_LINE_BUSRQ, state); + m_dma->bai_w(state); // tell dma that bus has been granted +} + +READ8_MEMBER( bigbord2_state::memory_read_byte ) { return m_mem->read_byte(offset); } -WRITE8_MEMBER(bigbord2_state::memory_write_byte) +WRITE8_MEMBER( bigbord2_state::memory_write_byte ) { m_mem->write_byte(offset, data); } -READ8_MEMBER(bigbord2_state::io_read_byte) +READ8_MEMBER( bigbord2_state::io_read_byte ) { return m_io->read_byte(offset); } -WRITE8_MEMBER(bigbord2_state::io_write_byte) +WRITE8_MEMBER( bigbord2_state::io_write_byte ) { m_io->write_byte(offset, data); } @@ -296,7 +303,7 @@ WRITE8_MEMBER( bigbord2_state::portc8_w ) // motor on if (m_floppy) { - m_floppy->mon_w(~m_c8[6]); + m_floppy->mon_w(m_c8[6]? 0 : 1); } break; case 7: @@ -338,11 +345,7 @@ WRITE8_MEMBER( bigbord2_state::portcc_w ) m_fdc->set_floppy(m_floppy); - bool dma_rdy = 0; - if ((data & 7) == 2) - dma_rdy = m_fdc->drq_r(); - - m_dma->rdy_w(dma_rdy); + m_dma->rdy_w(m_cc[data & 7]); } @@ -360,18 +363,19 @@ ADDRESS_MAP_END static ADDRESS_MAP_START( bigbord2_io, AS_IO, 8, bigbord2_state ) ADDRESS_MAP_GLOBAL_MASK(0xff) - AM_RANGE(0x80, 0x83) AM_DEVREADWRITE(Z80SIO_TAG, z80sio0_device, ba_cd_r, ba_cd_w) - //AM_RANGE(0x84, 0x87) AM_DEVREADWRITE(Z80CTCA_TAG, z80ctc_device, read, write) //has issues - AM_RANGE(0x88, 0x8b) AM_DEVREADWRITE(Z80CTCB_TAG, z80ctc_device, read, write) - AM_RANGE(0x8C, 0x8F) AM_DEVREADWRITE(Z80DMA_TAG, z80dma_device, read, write) - //AM_RANGE(0xC0, 0xC3) eprom programming port - AM_RANGE(0xC4, 0xC7) AM_READ(portc4_r) + ADDRESS_MAP_UNMAP_HIGH + AM_RANGE(0x80, 0x83) AM_DEVREADWRITE("sio", z80sio_device, ba_cd_r, ba_cd_w) // u16 + AM_RANGE(0x84, 0x87) AM_DEVREADWRITE("ctc1", z80ctc_device, read, write) // u37 has issues + AM_RANGE(0x88, 0x8b) AM_DEVREADWRITE("ctc2", z80ctc_device, read, write) // u21 + AM_RANGE(0x8C, 0x8F) AM_DEVREADWRITE("dma", z80dma_device, read, write) // u62 + AM_RANGE(0xC0, 0xC3) AM_WRITE(portc0_w) // eprom programming port + AM_RANGE(0xC4, 0xC7) AM_READ (portc4_r) AM_RANGE(0xC8, 0xCB) AM_WRITE(portc8_w) AM_RANGE(0xCC, 0xCF) AM_WRITE(portcc_w) - AM_RANGE(0xD0, 0xD3) AM_READ(portd0_r) - AM_RANGE(0xD4, 0xD7) AM_DEVREADWRITE("fdc", mb8877_t, read, write) + AM_RANGE(0xD0, 0xD3) AM_READ (portd0_r) + AM_RANGE(0xD4, 0xD7) AM_DEVREADWRITE("fdc", mb8877_t, read, write) // u10 //AM_RANGE(0xD8, 0xDB) AM_READWRITE(portd8_r, portd8_w) // various external data ports; DB = centronics printer - AM_RANGE(0xDC, 0xDC) AM_MIRROR(2) AM_DEVREADWRITE("crtc", mc6845_device, status_r, address_w) + AM_RANGE(0xDC, 0xDC) AM_MIRROR(2) AM_DEVREADWRITE("crtc", mc6845_device, status_r, address_w) // u30 AM_RANGE(0xDD, 0xDD) AM_MIRROR(2) AM_DEVREADWRITE("crtc", mc6845_device, register_r, register_w) ADDRESS_MAP_END @@ -398,51 +402,37 @@ INPUT_PORTS_END /* Z80 CTC */ -TIMER_DEVICE_CALLBACK_MEMBER(bigbord2_state::ctc_tick) +WRITE_LINE_MEMBER( bigbord2_state::clock_w ) { - m_ctcb->trg0(1); - m_ctcb->trg1(1); - m_ctcb->trg0(0); - m_ctcb->trg1(0); + m_ctc2->trg0(state); + m_ctc2->trg1(state); + if (m_floppy) + m_ctc1->trg1(m_floppy->idx_r()); } -WRITE_LINE_MEMBER( bigbord2_state::frame ) +// there's a multitude of optional jumpers in this area, but this will do +WRITE_LINE_MEMBER( bigbord2_state::ctc_z1_w ) { - static UINT8 framecnt; - framecnt++; - - if ((m_mem->read_byte(0xf13d) == 0x4d) & (framecnt > 3)) - { - framecnt = 0; - // simulate interrupt by saving current pc on - // the stack and jumping to interrupt handler. - UINT16 spreg = m_maincpu->state_int(Z80_SP); - UINT16 pcreg = m_maincpu->state_int(Z80_PC); - spreg--; - m_mem->write_byte(spreg, pcreg >> 8); - spreg--; - m_mem->write_byte(spreg, pcreg); - m_maincpu->set_state_int(Z80_SP, spreg); - m_maincpu->set_state_int(Z80_PC, 0xF18E); - } + m_sio->rxca_w(state); + m_sio->txca_w(state); } - /* Z80 Daisy Chain */ -static const z80_daisy_config bigbord2_daisy_chain[] = +static const z80_daisy_config daisy_chain[] = { - { Z80DMA_TAG }, - { Z80CTCA_TAG }, - { Z80CTCB_TAG }, - { Z80SIO_TAG }, + { "dma" }, + { "ctc1" }, + { "ctc2" }, + { "sio" }, { nullptr } }; /* WD1793 Interface */ static SLOT_INTERFACE_START( bigbord2_floppies ) - SLOT_INTERFACE( "525dd", FLOPPY_525_DD ) + SLOT_INTERFACE( "drive0", FLOPPY_8_DSDD ) + SLOT_INTERFACE( "drive1", FLOPPY_8_DSDD ) SLOT_INTERFACE_END @@ -452,8 +442,8 @@ void bigbord2_state::video_start() { /* find memory regions */ m_p_chargen = memregion("chargen")->base(); - m_p_videoram = memregion(Z80_TAG)->base()+0x6000; - m_p_attribram = memregion(Z80_TAG)->base()+0x7000; + m_p_videoram = memregion("maincpu")->base()+0x6000; + m_p_attribram = memregion("maincpu")->base()+0x7000; } @@ -463,13 +453,18 @@ void bigbord2_state::machine_start() { /* register for state saving */ save_item(NAME(m_term_data)); + m_floppy = nullptr; } void bigbord2_state::machine_reset() { UINT8 i; for (i = 0; i < 8; i++) + { m_c8[i] = 0; + m_cc[i] = 1; + } + m_cc[2] = 0; m_beeper->set_state(0); m_bankr->set_entry(0); m_bankv->set_entry(0); @@ -480,7 +475,7 @@ DRIVER_INIT_MEMBER(bigbord2_state,bigbord2) { m_mem = &m_maincpu->space(AS_PROGRAM); m_io = &m_maincpu->space(AS_IO); - UINT8 *RAM = memregion(Z80_TAG)->base(); + UINT8 *RAM = memregion("maincpu")->base(); m_bankr->configure_entries(0, 2, &RAM[0x0000], 0x10000); m_bankv->configure_entries(0, 2, &RAM[0x6000], 0x10000); m_banka->configure_entries(0, 2, &RAM[0x7000], 0x10000); @@ -490,39 +485,93 @@ DRIVER_INIT_MEMBER(bigbord2_state,bigbord2) /* Screen */ /* F4 Character Displayer */ -static const gfx_layout bigbord2_charlayout = +static const gfx_layout crt8002_charlayout = { - 8, 16, /* 8 x 8 characters */ - 256, /* 256 characters */ + 8, 12, /* 7 x 11 characters */ + 128, /* 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, 10*8, 11*8, 12*8, 13*8, 14*8, 15*8 }, - 8*16 /* every char takes 8 bytes */ + { 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8, 8*8, 9*8, 10*8, 11*8 }, + 8*16 /* every char takes 16 bytes */ }; -static GFXDECODE_START( bigbord2 ) - GFXDECODE_ENTRY( "chargen", 0x0000, bigbord2_charlayout, 0, 1 ) +static GFXDECODE_START( crt8002 ) + GFXDECODE_ENTRY( "chargen", 0x0000, crt8002_charlayout, 0, 1 ) GFXDECODE_END +UINT8 bigbord2_state::crt8002(UINT8 ac_ra, UINT8 ac_chr, UINT8 ac_attr, UINT16 ac_cnt, bool ac_curs) +{ + UINT8 gfx = 0; + switch (ac_attr & 3) + { + case 0: // lores gfx + switch (ac_ra) + { + case 0: + case 1: + case 2: + gfx = (BIT(ac_chr, 7) ? 0xf8 : 0) | (BIT(ac_chr, 3) ? 7 : 0); + break; + case 3: + case 4: + case 5: + gfx = (BIT(ac_chr, 6) ? 0xf8 : 0) | (BIT(ac_chr, 2) ? 7 : 0); + break; + case 6: + case 7: + case 8: + gfx = (BIT(ac_chr, 5) ? 0xf8 : 0) | (BIT(ac_chr, 1) ? 7 : 0); + break; + default: + gfx = (BIT(ac_chr, 4) ? 0xf8 : 0) | (BIT(ac_chr, 0) ? 7 : 0); + break; + } + break; + case 1: // external mode + gfx = BITSWAP8(ac_chr, 0,1,2,3,4,5,6,7); + break; + case 2: // thin gfx + break; + case 3: // alpha + gfx = m_p_chargen[((ac_chr & 0x7f)<<4) | ac_ra]; + break; + } + + if (BIT(ac_attr, 3) & (ac_ra == 11)) // underline + gfx = 0xff; + if (BIT(ac_attr, 2) & ((ac_ra == 5) | (ac_ra == 6))) // strike-through + gfx = 0xff; + if (BIT(ac_attr, 6) & BIT(ac_cnt, 13)) // flash + gfx = 0; + if BIT(ac_attr, 5) // blank + gfx = 0; + if (ac_curs && BIT(ac_cnt, 14)) // cursor + gfx ^= 0xff; + if BIT(ac_attr, 4) // reverse video + gfx ^= 0xff; + return gfx; +} + MC6845_UPDATE_ROW( bigbord2_state::crtc_update_row ) { const rgb_t *palette = m_palette->palette()->entry_list_raw(); - UINT8 chr,gfx,inv; + UINT8 chr,gfx,attr; UINT16 mem,x; UINT32 *p = &bitmap.pix32(y); + ra &= 15; + m_cnt++; for (x = 0; x < x_count; x++) { - inv=0; mem = (ma + x) & 0x7ff; - if (BIT(m_p_attribram[mem], 7)) inv^=0xff; + attr = m_p_attribram[mem]; chr = m_p_videoram[mem]; - /* get pattern of pixels for that character scanline */ - gfx = m_p_chargen[(chr<<4) | ra ] ^ inv; + /* process attributes */ + gfx = crt8002(ra, chr, attr, m_cnt, (x==cursor_x)); /* Display a scanline of a character */ *p++ = palette[BIT( gfx, 7 )]; @@ -542,60 +591,66 @@ MC6845_UPDATE_ROW( bigbord2_state::crtc_update_row ) static MACHINE_CONFIG_START( bigbord2, bigbord2_state ) /* basic machine hardware */ - MCFG_CPU_ADD(Z80_TAG, Z80, MAIN_CLOCK) + MCFG_CPU_ADD("maincpu", Z80, MAIN_CLOCK) MCFG_CPU_PROGRAM_MAP(bigbord2_mem) MCFG_CPU_IO_MAP(bigbord2_io) - MCFG_Z80_DAISY_CHAIN(bigbord2_daisy_chain) + MCFG_Z80_DAISY_CHAIN(daisy_chain) /* video hardware */ - MCFG_SCREEN_ADD(SCREEN_TAG, RASTER) + MCFG_SCREEN_ADD("screen", RASTER) MCFG_SCREEN_RAW_PARAMS(XTAL_10_69425MHz, 700, 0, 560, 260, 0, 240) MCFG_SCREEN_UPDATE_DEVICE("crtc", mc6845_device, screen_update) - MCFG_GFXDECODE_ADD("gfxdecode", "palette", bigbord2) + MCFG_GFXDECODE_ADD("gfxdecode", "palette", crt8002) MCFG_PALETTE_ADD_MONOCHROME("palette") - /* keyboard */ - MCFG_TIMER_DRIVER_ADD_PERIODIC("ctc", bigbord2_state, ctc_tick, attotime::from_hz(MAIN_CLOCK)) + MCFG_DEVICE_ADD("ctc_clock", CLOCK, MAIN_CLOCK) + MCFG_CLOCK_SIGNAL_HANDLER(WRITELINE(bigbord2_state, clock_w)) /* devices */ - MCFG_DEVICE_ADD(Z80DMA_TAG, Z80DMA, MAIN_CLOCK) - MCFG_Z80DMA_OUT_BUSREQ_CB(INPUTLINE(Z80_TAG, INPUT_LINE_HALT)) - MCFG_Z80DMA_OUT_INT_CB(INPUTLINE(Z80_TAG, INPUT_LINE_IRQ0)) + MCFG_DEVICE_ADD("dma", Z80DMA, MAIN_CLOCK) + MCFG_Z80DMA_OUT_BUSREQ_CB(WRITELINE(bigbord2_state, busreq_w)) + MCFG_Z80DMA_OUT_INT_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0)) MCFG_Z80DMA_IN_MREQ_CB(READ8(bigbord2_state, memory_read_byte)) MCFG_Z80DMA_OUT_MREQ_CB(WRITE8(bigbord2_state, memory_write_byte)) MCFG_Z80DMA_IN_IORQ_CB(READ8(bigbord2_state, io_read_byte)) MCFG_Z80DMA_OUT_IORQ_CB(WRITE8(bigbord2_state, io_write_byte)) - MCFG_Z80SIO0_ADD(Z80SIO_TAG, MAIN_CLOCK, 0, 0, 0, 0) - MCFG_Z80DART_OUT_INT_CB(INPUTLINE(Z80_TAG, INPUT_LINE_IRQ0)) - - MCFG_DEVICE_ADD(Z80CTCA_TAG, Z80CTC, MAIN_CLOCK) - MCFG_Z80CTC_INTR_CB(INPUTLINE(Z80_TAG, INPUT_LINE_IRQ0)) - // other inputs of ctca: - // trg0 = KBDSTB; trg1 = index pulse from fdc; trg2 = synca output from sio - - MCFG_DEVICE_ADD(Z80CTCB_TAG, Z80CTC, MAIN_CLOCK / 6) - MCFG_Z80CTC_INTR_CB(INPUTLINE(Z80_TAG, INPUT_LINE_IRQ0)) - // ZC0 = SIO channel B clock, ZC1 = SIO channel A clock - MCFG_Z80CTC_ZC2_CB(DEVWRITELINE(Z80CTCB_TAG, z80ctc_device, trg3)) - - MCFG_MB8877_ADD("fdc", XTAL_16MHz / 16) - MCFG_FLOPPY_DRIVE_ADD("fdc:0", bigbord2_floppies, "525dd", floppy_image_device::default_floppy_formats) - MCFG_FLOPPY_DRIVE_ADD("fdc:1", bigbord2_floppies, "525dd", floppy_image_device::default_floppy_formats) - - MCFG_MC6845_ADD("crtc", MC6845, SCREEN_TAG, XTAL_16MHz / 8) + MCFG_Z80SIO_ADD("sio", MAIN_CLOCK, 0, 0, 0, 0) + MCFG_Z80SIO_OUT_INT_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0)) + MCFG_Z80SIO_OUT_SYNCA_CB(DEVWRITELINE("ctc1", z80ctc_device, trg2)) + MCFG_Z80SIO_OUT_WRDYA_CB(WRITELINE(bigbord2_state, sio_wrdya_w)) + MCFG_Z80SIO_OUT_WRDYB_CB(WRITELINE(bigbord2_state, sio_wrdyb_w)) + + MCFG_DEVICE_ADD("ctc1", Z80CTC, MAIN_CLOCK) + MCFG_Z80CTC_INTR_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0)) + + MCFG_DEVICE_ADD("ctc2", Z80CTC, MAIN_CLOCK) + MCFG_Z80CTC_INTR_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0)) + MCFG_Z80CTC_ZC0_CB(DEVWRITELINE("sio", z80sio_device, rxtxcb_w)) // to SIO Ch B + MCFG_Z80CTC_ZC1_CB(WRITELINE(bigbord2_state, ctc_z1_w)) // to SIO Ch A + MCFG_Z80CTC_ZC2_CB(DEVWRITELINE("ctc2", z80ctc_device, trg3)) + + MCFG_MB8877_ADD("fdc", XTAL_16MHz / 8) // 2MHz for 8 inch, or 1MHz otherwise (jumper-selectable) + //MCFG_WD_FDC_INTRQ_CALLBACK(INPUTLINE("maincpu", ??)) // info missing from schematic + MCFG_FLOPPY_DRIVE_ADD("fdc:0", bigbord2_floppies, "drive0", floppy_image_device::default_floppy_formats) + MCFG_FLOPPY_DRIVE_SOUND(true) + MCFG_FLOPPY_DRIVE_ADD("fdc:1", bigbord2_floppies, "drive1", floppy_image_device::default_floppy_formats) + MCFG_FLOPPY_DRIVE_SOUND(true) + + MCFG_MC6845_ADD("crtc", MC6845, "screen", XTAL_16MHz / 8) MCFG_MC6845_SHOW_BORDER_AREA(false) MCFG_MC6845_CHAR_WIDTH(8) MCFG_MC6845_UPDATE_ROW_CB(bigbord2_state, crtc_update_row) - MCFG_MC6845_OUT_VSYNC_CB(WRITELINE(bigbord2_state, frame)) + MCFG_MC6845_OUT_VSYNC_CB(DEVWRITELINE("ctc1", z80ctc_device, trg3)) - MCFG_DEVICE_ADD(KEYBOARD_TAG, GENERIC_KEYBOARD, 0) - MCFG_GENERIC_KEYBOARD_CB(WRITE8(bigbord2_state, bigbord2_kbd_put)) + /* keyboard */ + MCFG_DEVICE_ADD("keyboard", GENERIC_KEYBOARD, 0) + MCFG_GENERIC_KEYBOARD_CB(WRITE8(bigbord2_state, kbd_put)) /* sound hardware */ MCFG_SPEAKER_STANDARD_MONO("mono") MCFG_SOUND_ADD("beeper", BEEP, 950) // actual frequency is unknown - MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.00) + MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50) MACHINE_CONFIG_END @@ -603,12 +658,11 @@ MACHINE_CONFIG_END ROM_START( bigbord2 ) - ROM_REGION( 0x18000, Z80_TAG, 0 ) + ROM_REGION( 0x18000, "maincpu", 0 ) ROM_LOAD( "bigbrdii.bin", 0x0000, 0x1000, CRC(c588189e) SHA1(4133903171ee8b9fcf12cc72de843af782b4a645) ) - // internal to 8002 chip (undumped) we will use one from 'vta2000' for now - ROM_REGION( 0x2000, "chargen", ROMREGION_INVERT ) - ROM_LOAD( "bdp-15_14.rom", 0x0000, 0x2000, BAD_DUMP CRC(a1dc4f8e) SHA1(873fd211f44713b713d73163de2d8b5db83d2143) ) + ROM_REGION( 0x800, "chargen", 0 ) + ROM_LOAD( "8002.bin", 0x0000, 0x0800, CRC(fdd6eb13) SHA1(a094d416e66bdab916e72238112a6265a75ca690) ) ROM_END /* System Drivers */ |