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Diffstat (limited to 'src/mame/drivers/bitgraph.cpp')
-rw-r--r--src/mame/drivers/bitgraph.cpp644
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diff --git a/src/mame/drivers/bitgraph.cpp b/src/mame/drivers/bitgraph.cpp
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--- a/src/mame/drivers/bitgraph.cpp
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-// license:BSD-3-Clause
-// copyright-holders:Sergey Svishchev
-/***************************************************************************
-
- BBN BitGraph -- monochrome, raster graphics (768x1024), serial terminal.
-
- Apparently had at least four hardware revisions, A-D, but which ROM
- revisions support which hardware is unclear. A Versabus slot, and
- various hardware and software options are mentioned in the docs. Best
- guesses follow.
-
- Onboard hardware (common to all revisions) is
- - 32K ROM
- - 128K RAM (includes frame buffer)
- - 3 serial ports, each driven by 6850 ACIA
- - some kind of baud rate generator, possibly COM8016
- - sync serial port, driven by 6854 but apparently never supported by ROM
- - 682x PIA
- - AY-3-891x PSG
- - ER2055 EAROM
- - DEC VT100 keyboard interface
-
- Rev A has additional 4th serial port for mouse (not supported by ROM 1.25).
- Rev A has 40 hz realtime clock, the rest use 1040 hz.
- Rev A-C use AY-3-8912 (with one external PIO port, to connect the EAROM).
- Rev D uses AY-3-8913 (no external ports; EAROM is wired to TBD).
- Rev B-D have onboard 8035 to talk to parallel printer and mouse.
- Rev B-D have more memory (at least up to 512K).
-
- ROM 1.25 doesn't support mouse, setup mode, pixel data upload and autowrap.
-
- Missing/incorrect emulation:
- Bidirectional keyboard interface (to drive LEDs and speaker).
- 8035.
- EAROM.
- 1.25 only -- clksync() is dummied out -- causes watchdog resets.
- Selectable memory size.
- Video enable/reverse video switch.
-
-****************************************************************************/
-
-#include "emu.h"
-
-#include "bus/centronics/ctronics.h"
-#include "bus/rs232/rs232.h"
-#include "cpu/m68000/m68000.h"
-#include "cpu/mcs48/mcs48.h"
-#include "machine/6821pia.h"
-#include "machine/6850acia.h"
-#include "machine/clock.h"
-#include "machine/com8116.h"
-#include "machine/er2055.h"
-#include "machine/i8243.h"
-#include "machine/mc6854.h"
-#include "machine/ram.h"
-#include "sound/ay8910.h"
-
-#include "emupal.h"
-#include "screen.h"
-#include "speaker.h"
-
-#define M68K_TAG "maincpu"
-#define PPU_TAG "ppu"
-
-#define ACIA0_TAG "acia0"
-#define ACIA1_TAG "acia1"
-#define ACIA2_TAG "acia2"
-#define ACIA3_TAG "acia3"
-#define RS232_H_TAG "rs232host"
-#define RS232_K_TAG "rs232kbd"
-#define RS232_D_TAG "rs232debug"
-#define RS232_M_TAG "rs232mouse"
-#define ADLC_TAG "adlc"
-#define PIA_TAG "pia"
-#define PSG_TAG "psg"
-#define EAROM_TAG "earom"
-
-
-//#define LOG_GENERAL (1U << 0) //defined in logmacro.h already
-#define LOG_PIA (1U << 1)
-#define LOG_DEBUG (1U << 2)
-
-//#define VERBOSE (LOG_DEBUG)
-//#define LOG_OUTPUT_FUNC printf
-#include "logmacro.h"
-
-#define LOGPIA(...) LOGMASKED(LOG_PIA, __VA_ARGS__)
-#define LOGDBG(...) LOGMASKED(LOG_DEBUG, __VA_ARGS__)
-
-
-class bitgraph_state : public driver_device
-{
-public:
- bitgraph_state(const machine_config &mconfig, device_type type, const char *tag)
- : driver_device(mconfig, type, tag)
- , m_maincpu(*this, M68K_TAG)
- , m_ram(*this, RAM_TAG)
- , m_acia0(*this, ACIA0_TAG)
- , m_acia1(*this, ACIA1_TAG)
- , m_acia2(*this, ACIA2_TAG)
- , m_acia3(*this, ACIA3_TAG)
- , m_adlc(*this, ADLC_TAG)
- , m_dbrga(*this, "com8116_a")
- , m_dbrgb(*this, "com8116_b")
- , m_pia(*this, PIA_TAG)
- , m_psg(*this, PSG_TAG)
- , m_earom(*this, EAROM_TAG)
- , m_centronics(*this, "centronics")
- , m_screen(*this, "screen")
- { }
-
- static constexpr feature_type imperfect_features() { return feature::KEYBOARD; }
-
- uint8_t pia_r(offs_t offset);
- void pia_w(offs_t offset, uint8_t data);
- uint8_t pia_pa_r();
- uint8_t pia_pb_r();
- void pia_pa_w(uint8_t data);
- void pia_pb_w(uint8_t data);
- DECLARE_READ_LINE_MEMBER(pia_ca1_r);
- DECLARE_WRITE_LINE_MEMBER(pia_cb2_w);
-
- void baud_write(uint16_t data);
- DECLARE_WRITE_LINE_MEMBER(com8116_a_fr_w);
- DECLARE_WRITE_LINE_MEMBER(com8116_a_ft_w);
- DECLARE_WRITE_LINE_MEMBER(com8116_b_fr_w);
- DECLARE_WRITE_LINE_MEMBER(com8116_b_ft_w);
-
- uint8_t adlc_r(offs_t offset);
- void adlc_w(offs_t offset, uint8_t data);
-
- void earom_write(uint8_t data);
- void misccr_write(uint8_t data);
- DECLARE_WRITE_LINE_MEMBER(system_clock_write);
-
- uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
-
- uint8_t ppu_read(offs_t offset);
- void ppu_write(offs_t offset, uint8_t data);
- void ppu_i8243_w(offs_t offset, uint8_t data);
-
- void bg_motherboard(machine_config &config);
- void bitgrpha(machine_config &config);
- void bitgrphb(machine_config &config);
- void bitgrapha_mem(address_map &map);
- void bitgraphb_mem(address_map &map);
- void ppu_io(address_map &map);
-private:
- virtual void machine_start() override;
- virtual void machine_reset() override;
- required_device<cpu_device> m_maincpu;
- required_device<ram_device> m_ram;
- required_device<acia6850_device> m_acia0;
- required_device<acia6850_device> m_acia1;
- required_device<acia6850_device> m_acia2;
- optional_device<acia6850_device> m_acia3;
- optional_device<mc6854_device> m_adlc;
- required_device<com8116_device> m_dbrga;
- required_device<com8116_device> m_dbrgb;
- required_device<pia6821_device> m_pia;
- required_device<ay8912_device> m_psg;
- required_device<er2055_device> m_earom;
- optional_device<centronics_device> m_centronics;
- required_device<screen_device> m_screen;
-
- uint8_t *m_videoram;
- uint8_t m_misccr;
- uint8_t m_pia_a;
- uint8_t m_pia_b;
- uint8_t m_ppu[4];
-};
-
-void bitgraph_state::bitgrapha_mem(address_map &map)
-{
- map.unmap_value_high();
- map(0x000000, 0x007fff).rom();
- map(0x010000, 0x010000).rw(m_acia0, FUNC(acia6850_device::data_r), FUNC(acia6850_device::data_w)); // HOST
- map(0x010002, 0x010002).rw(m_acia0, FUNC(acia6850_device::status_r), FUNC(acia6850_device::control_w));
- map(0x010009, 0x010009).rw(m_acia1, FUNC(acia6850_device::data_r), FUNC(acia6850_device::data_w)); // KEYBOARD
- map(0x01000b, 0x01000b).rw(m_acia1, FUNC(acia6850_device::status_r), FUNC(acia6850_device::control_w));
- map(0x010011, 0x010011).rw(m_acia2, FUNC(acia6850_device::data_r), FUNC(acia6850_device::data_w)); // DEBUGGER
- map(0x010013, 0x010013).rw(m_acia2, FUNC(acia6850_device::status_r), FUNC(acia6850_device::control_w));
- map(0x010019, 0x010019).rw(m_acia3, FUNC(acia6850_device::data_r), FUNC(acia6850_device::data_w)); // POINTER
- map(0x01001b, 0x01001b).rw(m_acia3, FUNC(acia6850_device::status_r), FUNC(acia6850_device::control_w));
- map(0x010020, 0x010027).rw(FUNC(bitgraph_state::adlc_r), FUNC(bitgraph_state::adlc_w)).umask16(0xff00);
- map(0x010028, 0x01002f).rw(FUNC(bitgraph_state::pia_r), FUNC(bitgraph_state::pia_w)).umask16(0xff00); // EAROM, PSG
- map(0x010030, 0x010031).w(FUNC(bitgraph_state::baud_write));
- map(0x3e0000, 0x3fffff).ram();
-}
-
-void bitgraph_state::bitgraphb_mem(address_map &map)
-{
- map.unmap_value_high();
- map(0x000000, 0x007fff).rom();
- map(0x010000, 0x010000).rw(m_acia0, FUNC(acia6850_device::data_r), FUNC(acia6850_device::data_w)); // HOST
- map(0x010002, 0x010002).rw(m_acia0, FUNC(acia6850_device::status_r), FUNC(acia6850_device::control_w));
- map(0x010009, 0x010009).rw(m_acia1, FUNC(acia6850_device::data_r), FUNC(acia6850_device::data_w)); // KEYBOARD
- map(0x01000b, 0x01000b).rw(m_acia1, FUNC(acia6850_device::status_r), FUNC(acia6850_device::control_w));
- map(0x010011, 0x010011).rw(m_acia2, FUNC(acia6850_device::data_r), FUNC(acia6850_device::data_w)); // DEBUGGER
- map(0x010013, 0x010013).rw(m_acia2, FUNC(acia6850_device::status_r), FUNC(acia6850_device::control_w));
- map(0x01001b, 0x01001b).w(FUNC(bitgraph_state::misccr_write));
- map(0x010020, 0x010027).rw(FUNC(bitgraph_state::adlc_r), FUNC(bitgraph_state::adlc_w)).umask16(0xff00);
- map(0x010028, 0x01002f).rw(FUNC(bitgraph_state::pia_r), FUNC(bitgraph_state::pia_w)).umask16(0xff00); // EAROM, PSG
- map(0x010030, 0x010031).w(FUNC(bitgraph_state::baud_write));
-// map(0x010030, 0x010037).r(FUNC(bitgraph_state::ppu_read)).umask16(0x00ff);
- map(0x010038, 0x01003f).w(FUNC(bitgraph_state::ppu_write)).umask16(0x00ff);
- map(0x380000, 0x3fffff).ram();
-}
-
-static INPUT_PORTS_START(bitgraph)
-INPUT_PORTS_END
-
-static DEVICE_INPUT_DEFAULTS_START( kbd_rs232_defaults )
- DEVICE_INPUT_DEFAULTS( "RS232_TXBAUD", 0xff, RS232_BAUD_300 )
- DEVICE_INPUT_DEFAULTS( "RS232_RXBAUD", 0xff, RS232_BAUD_300 )
- DEVICE_INPUT_DEFAULTS( "RS232_STARTBITS", 0xff, RS232_STARTBITS_1 )
- DEVICE_INPUT_DEFAULTS( "RS232_DATABITS", 0xff, RS232_DATABITS_8 )
- DEVICE_INPUT_DEFAULTS( "RS232_PARITY", 0xff, RS232_PARITY_NONE )
- DEVICE_INPUT_DEFAULTS( "RS232_STOPBITS", 0xff, RS232_STOPBITS_1 )
- DEVICE_INPUT_DEFAULTS( "FLOW_CONTROL", 0x01, 0x01 )
-DEVICE_INPUT_DEFAULTS_END
-
-
-uint8_t bitgraph_state::pia_r(offs_t offset)
-{
- LOGPIA("PIA R %d\n", offset);
- return m_pia->read(3 - offset);
-}
-
-void bitgraph_state::pia_w(offs_t offset, uint8_t data)
-{
- LOGPIA("PIA W %d < %02X\n", offset, data);
- return m_pia->write(3 - offset, data);
-}
-
-READ_LINE_MEMBER(bitgraph_state::pia_ca1_r)
-{
- return m_screen->frame_number() & 1;
-}
-
-WRITE_LINE_MEMBER(bitgraph_state::pia_cb2_w)
-{
- // XXX shut up verbose log
-}
-
-uint8_t bitgraph_state::pia_pa_r()
-{
- uint8_t data = BIT(m_pia_b, 3) ? m_earom->data() : m_pia_a;
- LOGDBG("PIA A == %02X (%s)\n", data, BIT(m_pia_b, 3) ? "earom" : "pia");
- return data;
-}
-
-void bitgraph_state::pia_pa_w(uint8_t data)
-{
- LOGDBG("PIA A <- %02X\n", data);
- m_pia_a = data;
-}
-
-/*
- B0 O: BC1 to noisemaker.
- B1 O: BDIR to noisemaker.
- B2 O: Clock for EAROM.
- B3 O: CS1 for EAROM.
- B4 O: Enable HDLC Xmt interrupt.
- B5 O: Enable HDLC Rcv interrupt.
- B6 O: Clear Clock interrupt. Must write a 0 [clear interrupt], then a 1.
- B7 I: EVEN field ??
-*/
-uint8_t bitgraph_state::pia_pb_r()
-{
- LOGDBG("PIA B == %02X\n", m_pia_b);
- return m_pia_b;
-}
-
-void bitgraph_state::pia_pb_w(uint8_t data)
-{
- LOGDBG("PIA B <- %02X\n", data);
- m_pia_b = data;
-
- switch (m_pia_b & 0x03)
- {
- case 2:
- m_psg->data_w(m_pia_a);
- break;
- case 3:
- m_psg->address_w(m_pia_a);
- break;
- }
-
- if (BIT(m_pia_b, 3))
- {
- LOGDBG("EAROM data <- %02X\n", m_pia_a);
- m_earom->set_data(m_pia_a);
- }
- // CS1, ~CS2, C1, C2
- m_earom->set_control(BIT(m_pia_b, 3), BIT(m_pia_b, 3), BIT(m_pia_a, 6), BIT(m_pia_a, 7));
- m_earom->set_clk(BIT(m_pia_b, 2));
-
- if (!BIT(m_pia_b, 6))
- {
- m_maincpu->set_input_line(M68K_IRQ_6, CLEAR_LINE);
- }
-}
-
-void bitgraph_state::earom_write(uint8_t data)
-{
- LOGDBG("EAROM addr <- %02X (%02X)\n", data & 0x3f, data);
- m_earom->set_address(data & 0x3f);
-}
-
-// written once and never changed
-void bitgraph_state::misccr_write(uint8_t data)
-{
- LOG("MISCCR <- %02X (DTR %d MAP %d)\n", data, BIT(data, 3), (data & 3));
- m_misccr = data;
-}
-
-WRITE_LINE_MEMBER(bitgraph_state::system_clock_write)
-{
- if (!BIT(m_pia_b, 6))
- {
- m_maincpu->set_input_line(M68K_IRQ_6, CLEAR_LINE);
- return;
- }
- if (state)
- {
- m_maincpu->set_input_line(M68K_IRQ_6, ASSERT_LINE);
- }
- else
- {
- m_maincpu->set_input_line(M68K_IRQ_6, CLEAR_LINE);
- }
-}
-
-// rev A writes EA5E -- 9600 HOST, 2400 PNT, 300 KBD, 9600 DBG
-// rev B writes EE5E -- 9600 HOST, 9600 PNT, 300 KBD, 9600 DBG
-void bitgraph_state::baud_write(uint16_t data)
-{
- LOG("Baud %04X\n", data);
- m_dbrgb->str_w(data & 15); // 2 DBG
- m_dbrga->stt_w((data >> 4) & 15); // 1 KBD
- m_dbrgb->stt_w((data >> 8) & 15); // 3 PNT
- m_dbrga->str_w((data >> 12) & 15); // 0 HOST
-}
-
-WRITE_LINE_MEMBER(bitgraph_state::com8116_a_fr_w)
-{
- m_acia0->write_txc(state);
- m_acia0->write_rxc(state);
-}
-
-WRITE_LINE_MEMBER(bitgraph_state::com8116_a_ft_w)
-{
- m_acia1->write_txc(state);
- m_acia1->write_rxc(state);
-}
-
-WRITE_LINE_MEMBER(bitgraph_state::com8116_b_fr_w)
-{
- m_acia2->write_txc(state);
- m_acia2->write_rxc(state);
-}
-
-WRITE_LINE_MEMBER(bitgraph_state::com8116_b_ft_w)
-{
- if (m_acia3.found())
- {
- m_acia3->write_txc(state);
- m_acia3->write_rxc(state);
- }
-}
-
-uint8_t bitgraph_state::adlc_r(offs_t offset)
-{
- LOG("ADLC R %d\n", offset);
- return m_adlc.found() ? m_adlc->read(3 - offset) : 0xff;
-}
-
-void bitgraph_state::adlc_w(offs_t offset, uint8_t data)
-{
- LOG("ADLC W %d < %02X\n", offset, data);
- if (m_adlc.found()) return m_adlc->write(3 - offset, data);
-}
-
-uint32_t bitgraph_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
-{
- for (int y = 0; y < 768; y++)
- {
- uint16_t *p = &bitmap.pix(y);
-
- for (int x = 0; x < 1024 / 8; x += 2)
- {
- uint8_t gfx = m_videoram[(x + 1) | (y << 7)];
- for (int i = 7; i >= 0; i--)
- {
- *p++ = BIT(gfx, i);
- }
-
- gfx = m_videoram[x | (y << 7)];
- for (int i = 7; i >= 0; i--)
- {
- *p++ = BIT(gfx, i);
- }
- }
- }
- return 0;
-}
-
-uint8_t bitgraph_state::ppu_read(offs_t offset)
-{
- uint8_t data = m_ppu[offset];
- LOGDBG("PPU %d == %02X\n", offset, data);
- return data;
-}
-
-void bitgraph_state::ppu_write(offs_t offset, uint8_t data)
-{
- LOGDBG("PPU %d <- %02X\n", offset, data);
- m_ppu[offset] = data;
-}
-
-#ifdef UNUSED_FUNCTION
-void bitgraph_state::ppu_io(address_map &map)
-{
-// map(0x00, 0x00).r(FUNC(bitgraph_state::ppu_irq));
-}
-#endif
-
-/*
- p4 O: Centronics data 3..0
- p5 O: Centronics data 7..4
- p6 O: Centronics control
- p7 I: Centronics status
-*/
-void bitgraph_state::ppu_i8243_w(offs_t offset, uint8_t data)
-{
- LOG("PPU 8243 %d <- %02X\n", offset + 4, data);
- switch (offset)
- {
- case 0:
- m_centronics->write_data0(BIT(data, 0));
- m_centronics->write_data1(BIT(data, 1));
- m_centronics->write_data2(BIT(data, 2));
- m_centronics->write_data3(BIT(data, 3));
- break;
- case 1:
- m_centronics->write_data4(BIT(data, 0));
- m_centronics->write_data5(BIT(data, 1));
- m_centronics->write_data6(BIT(data, 2));
- m_centronics->write_data7(BIT(data, 3));
- break;
- case 2:
- m_centronics->write_strobe(BIT(data, 0));
- // 1: Paper instruction
- m_centronics->write_init(BIT(data, 2));
- break;
- case 3:
- m_centronics->write_ack(BIT(data, 0));
- m_centronics->write_busy(BIT(data, 1));
- m_centronics->write_perror(BIT(data, 2));
- m_centronics->write_select(BIT(data, 3));
- break;
- }
-}
-
-
-void bitgraph_state::machine_start()
-{
- m_videoram = (uint8_t *)m_maincpu->space(AS_PROGRAM).get_write_ptr(0x3e0000);
-}
-
-void bitgraph_state::machine_reset()
-{
- m_maincpu->reset();
- m_misccr = 0;
- m_pia_a = 0;
- m_pia_b = 0;
- memset(m_ppu, 0, sizeof(m_ppu));
-}
-
-
-void bitgraph_state::bg_motherboard(machine_config &config)
-{
- SCREEN(config, m_screen, SCREEN_TYPE_RASTER);
- m_screen->set_refresh_hz(40);
- m_screen->set_vblank_time(ATTOSECONDS_IN_USEC(2500)); /* not accurate */
- m_screen->set_size(1024, 768);
- m_screen->set_visarea_full();
- m_screen->set_screen_update(FUNC(bitgraph_state::screen_update));
- m_screen->set_palette("palette");
-
- PALETTE(config, "palette", palette_device::MONOCHROME);
-
- ACIA6850(config, m_acia0, 0);
- m_acia0->txd_handler().set(RS232_H_TAG, FUNC(rs232_port_device::write_txd));
- m_acia0->rts_handler().set(RS232_H_TAG, FUNC(rs232_port_device::write_rts));
- m_acia0->irq_handler().set_inputline(m_maincpu, M68K_IRQ_1);
-
- rs232_port_device &rs232h(RS232_PORT(config, RS232_H_TAG, default_rs232_devices, "null_modem"));
- rs232h.rxd_handler().set(m_acia0, FUNC(acia6850_device::write_rxd));
- rs232h.dcd_handler().set(m_acia0, FUNC(acia6850_device::write_dcd));
- rs232h.cts_handler().set(m_acia0, FUNC(acia6850_device::write_cts));
-
- ACIA6850(config, m_acia1, 0);
- m_acia1->txd_handler().set(RS232_K_TAG, FUNC(rs232_port_device::write_txd));
- m_acia1->rts_handler().set(RS232_K_TAG, FUNC(rs232_port_device::write_rts));
- m_acia1->irq_handler().set_inputline(m_maincpu, M68K_IRQ_1);
-
- rs232_port_device &rs232k(RS232_PORT(config, RS232_K_TAG, default_rs232_devices, "keyboard"));
- rs232k.rxd_handler().set(m_acia1, FUNC(acia6850_device::write_rxd));
- rs232k.dcd_handler().set(m_acia1, FUNC(acia6850_device::write_dcd));
- rs232k.cts_handler().set(m_acia1, FUNC(acia6850_device::write_cts));
- rs232k.set_option_device_input_defaults("keyboard", DEVICE_INPUT_DEFAULTS_NAME(kbd_rs232_defaults));
-
- ACIA6850(config, m_acia2, 0);
- m_acia2->txd_handler().set(RS232_D_TAG, FUNC(rs232_port_device::write_txd));
- m_acia2->rts_handler().set(RS232_D_TAG, FUNC(rs232_port_device::write_rts));
- m_acia2->irq_handler().set_inputline(m_maincpu, M68K_IRQ_1);
-
- rs232_port_device &rs232d(RS232_PORT(config, RS232_D_TAG, default_rs232_devices, nullptr));
- rs232d.rxd_handler().set(m_acia2, FUNC(acia6850_device::write_rxd));
- rs232d.dcd_handler().set(m_acia2, FUNC(acia6850_device::write_dcd));
- rs232d.cts_handler().set(m_acia2, FUNC(acia6850_device::write_cts));
-
- // XXX actual part may be something else
- COM8116(config, m_dbrga, 5.0688_MHz_XTAL);
- m_dbrga->fr_handler().set(FUNC(bitgraph_state::com8116_a_fr_w));
- m_dbrga->ft_handler().set(FUNC(bitgraph_state::com8116_a_ft_w));
-
- COM8116(config, m_dbrgb, 5.0688_MHz_XTAL);
- m_dbrgb->fr_handler().set(FUNC(bitgraph_state::com8116_b_fr_w));
- m_dbrgb->ft_handler().set(FUNC(bitgraph_state::com8116_b_ft_w));
-
- PIA6821(config, m_pia, 0);
- m_pia->readca1_handler().set(FUNC(bitgraph_state::pia_ca1_r));
- m_pia->cb2_handler().set(FUNC(bitgraph_state::pia_cb2_w));
- m_pia->readpa_handler().set(FUNC(bitgraph_state::pia_pa_r));
- m_pia->writepa_handler().set(FUNC(bitgraph_state::pia_pa_w));
- m_pia->readpb_handler().set(FUNC(bitgraph_state::pia_pb_r));
- m_pia->writepb_handler().set(FUNC(bitgraph_state::pia_pb_w));
-
- ER2055(config, m_earom, 0);
-
- SPEAKER(config, "mono").front_center();
- AY8912(config, m_psg, XTAL(1'294'400));
- m_psg->port_a_write_callback().set(FUNC(bitgraph_state::earom_write));
- m_psg->add_route(ALL_OUTPUTS, "mono", 1.00);
-}
-
-#ifdef UNUSED_FUNCTION
-void bitgraph_state::bg_ppu(machine_config &config)
-{
- i8035_device &ppu(I8035(config, PPU_TAG, XTAL(6'900'000)));
- ppu.set_addrmap(AS_IO, &bitgraph_state::ppu_io);
-// ppu.t0_in_cb().set(FUNC(bitgraph_state::ppu_t0_r));
- ppu.prog_out_cb().set("i8243", FUNC(i8243_device::prog_w));
-
- i8243_device &i8243(I8243(config, "i8243"));
- i8243.read_handler().set_nop();
- i8243.write_handler().set(FUNC(bitgraph_state::ppu_i8243_w));
-
- CENTRONICS(config, m_centronics, centronics_devices, "printer");
- m_centronics->ack_handler().set("cent_status_in", FUNC(input_buffer_device::write_bit6));
- m_centronics->busy_handler().set("cent_status_in", FUNC(input_buffer_device::write_bit7));
- m_centronics->fault_handler().set("cent_status_in", FUNC(input_buffer_device::write_bit4));
- m_centronics->perror_handler().set("cent_status_in", FUNC(input_buffer_device::write_bit5));
-
- INPUT_BUFFER(config, "cent_status_in");
-
- output_latch_device &cent_data_out(OUTPUT_LATCH(config, "cent_data_out"));
- m_centronics->set_output_latch(cent_data_out);
-}
-#endif
-
-void bitgraph_state::bitgrpha(machine_config &config)
-{
- M68000(config, m_maincpu, XTAL(6'900'000));
- m_maincpu->set_addrmap(AS_PROGRAM, &bitgraph_state::bitgrapha_mem);
-
- bg_motherboard(config);
-
- CLOCK(config, "system_clock", 40).signal_handler().set(FUNC(bitgraph_state::system_clock_write));
-
- ACIA6850(config, m_acia3, 0);
- m_acia3->txd_handler().set(RS232_M_TAG, FUNC(rs232_port_device::write_txd));
- m_acia3->rts_handler().set(RS232_M_TAG, FUNC(rs232_port_device::write_rts));
- m_acia3->irq_handler().set_inputline(M68K_TAG, M68K_IRQ_1);
-
- rs232_port_device &rs232m(RS232_PORT(config, RS232_M_TAG, default_rs232_devices, nullptr));
- rs232m.rxd_handler().set(m_acia3, FUNC(acia6850_device::write_rxd));
- rs232m.dcd_handler().set(m_acia3, FUNC(acia6850_device::write_dcd));
- rs232m.cts_handler().set(m_acia3, FUNC(acia6850_device::write_cts));
-
- RAM(config, RAM_TAG).set_default_size("128K");
-}
-
-void bitgraph_state::bitgrphb(machine_config &config)
-{
- M68000(config, m_maincpu, XTAL(6'900'000));
- m_maincpu->set_addrmap(AS_PROGRAM, &bitgraph_state::bitgraphb_mem);
-
- bg_motherboard(config);
-// bg_ppu(config);
-
- CLOCK(config, "system_clock", 1040).signal_handler().set(FUNC(bitgraph_state::system_clock_write));
-
- RAM(config, RAM_TAG).set_default_size("512K");
-}
-
-/* ROM definition */
-ROM_START( bitgrpha )
- ROM_REGION16_BE( 0x8000, M68K_TAG, 0 )
- ROM_LOAD( "bg125.rom", 0x000000, 0x008000, CRC(b86c974e) SHA1(5367db80a856444c2a55de22b69a13f97a62f602))
- ROM_FILL( 0x38e4, 1, 0x4e ) // disable clksync()
- ROM_FILL( 0x38e5, 1, 0x75 )
-ROM_END
-
-ROM_START( bitgrphb )
- ROM_REGION16_BE( 0x8000, M68K_TAG, 0 )
- ROM_DEFAULT_BIOS("2.33a")
-
- ROM_SYSTEM_BIOS(0, "2.33a", "rev 2.33 Alpha' ROM")
- ROMX_LOAD( "bg2.32lo_u10.bin", 0x004001, 0x002000, CRC(6a702a96) SHA1(acdf1ba34038b4ccafb5b8069e70ae57a3b8a7e0), ROM_BIOS(0) | ROM_SKIP(1))
- ROMX_LOAD( "bg2.32hi_u12.bin", 0x004000, 0x002000, CRC(a282a2c8) SHA1(ea7e4d4e197201c8944acef54479d5c2b26d409f), ROM_BIOS(0) | ROM_SKIP(1))
- ROMX_LOAD( "bg2.32lo_u11.bin", 0x000001, 0x002000, CRC(46912afd) SHA1(c1f771adc1ef62b1fb1b904ed1d2a61009e24f55), ROM_BIOS(0) | ROM_SKIP(1))
- ROMX_LOAD( "bg2.32hi_u13.bin", 0x000000, 0x002000, CRC(731df44f) SHA1(8c238b5943b8864e539f92891a0ffa6ddd4fc779), ROM_BIOS(0) | ROM_SKIP(1))
-
- ROM_SYSTEM_BIOS(1, "3.0p", "rev 3.0P ROM")
- ROMX_LOAD( "bg5173_u10.bin", 0x004001, 0x002000, CRC(40014850) SHA1(ef0b7da58a5183391a3a03947882197f25694518), ROM_BIOS(1) | ROM_SKIP(1))
- ROMX_LOAD( "bg5175_u12.bin", 0x004000, 0x002000, CRC(c2c4cc6c) SHA1(dbbce7cb58b4cef1557a834cbb07b3ace298cb8b), ROM_BIOS(1) | ROM_SKIP(1))
- ROMX_LOAD( "bg5174_u11.bin", 0x000001, 0x002000, CRC(639768b9) SHA1(68f623bcf3bb75390ba2b17efc067cf25f915ec0), ROM_BIOS(1) | ROM_SKIP(1))
- ROMX_LOAD( "bg5176_u13.bin", 0x000000, 0x002000, CRC(984e7e8c) SHA1(dd13cbaff96a8b9936ae8cb07205c6abe8b27b6e), ROM_BIOS(1) | ROM_SKIP(1))
-
- ROM_SYSTEM_BIOS(2, "ramtest", "RAM test")
- ROMX_LOAD( "ramtest.rom", 0x000000, 0x004000, CRC(fabe3b34) SHA1(4d892a2ed2b7ea12d83843609981be9069611d43), ROM_BIOS(2))
-
- ROM_REGION( 0x800, PPU_TAG, 0 )
- ROM_LOAD( "bg_mouse_u9.bin", 0x0000, 0x0800, CRC(fd827ff5) SHA1(6d4a8e9b18c7610c5cfde40464826d144d387601))
-ROM_END
-
-/* Driver */
-// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS
-COMP( 1981, bitgrpha, 0, 0, bitgrpha, bitgraph, bitgraph_state, empty_init, "BBN", "BitGraph rev A", ROT90 )
-COMP( 1982, bitgrphb, 0, 0, bitgrphb, bitgraph, bitgraph_state, empty_init, "BBN", "BitGraph rev B", ROT270 | MACHINE_NOT_WORKING )