mirror of
https://github.com/holub/mame
synced 2025-04-25 17:56:43 +03:00
bbc_cumana68k: Remove trampolines and cleanup (nw)
This commit is contained in:
Nigel Barnes
parent
bb68893deb
commit
31ce39b9a0
@ -27,19 +27,17 @@ DEFINE_DEVICE_TYPE(BBC_CUMANA68K, bbc_cumana68k_device, "bbc_cumana68k", "Cumana
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void bbc_cumana68k_device::cumana68k_mem(address_map &map)
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{
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map.unmap_value_high();
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map(0x000000, 0x00ffff).rw(FUNC(bbc_cumana68k_device::dma_r), FUNC(bbc_cumana68k_device::dma_w));
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map(0x010000, 0x0fffff).ram();
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map(0x000000, 0x00ffff).mirror(0x70000).rw(FUNC(bbc_cumana68k_device::mem6502_r), FUNC(bbc_cumana68k_device::mem6502_w));
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map(0x080000, 0x0fffff).ram();
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}
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//-------------------------------------------------
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// SLOT_INTERFACE( os9_floppies )
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// FLOPPY_FORMATS( floppy_formats )
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//-------------------------------------------------
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static void os9_floppies(device_slot_interface &device)
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{
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device.option_add("525qd", FLOPPY_525_QD);
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}
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FLOPPY_FORMATS_MEMBER(bbc_cumana68k_device::floppy_formats)
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FLOPPY_OS9_FORMAT
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FLOPPY_FORMATS_END
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//-------------------------------------------------
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// ROM( cumana68k )
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@ -59,37 +57,43 @@ void bbc_cumana68k_device::device_add_mconfig(machine_config &config)
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/* basic machine hardware */
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M68008(config, m_m68008, 16_MHz_XTAL / 2);
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m_m68008->set_addrmap(AS_PROGRAM, &bbc_cumana68k_device::cumana68k_mem);
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//m_m68008->set_irq_acknowledge_callback(device_irq_acknowledge_delegate(FUNC(bbc_cumana68k_device::irq_callback), this));
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/* fdc */
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WD2797(config, m_fdc, 16_MHz_XTAL / 16);
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m_fdc->intrq_wr_callback().set(m_pia_rtc, FUNC(pia6821_device::cb1_w));
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m_fdc->drq_wr_callback().set(FUNC(bbc_cumana68k_device::drq_w));
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m_fdc->drq_wr_callback().set(m_pia_sasi, FUNC(pia6821_device::pb6_w));
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m_fdc->drq_wr_callback().append(DEVICE_SELF_OWNER, FUNC(bbc_internal_slot_device::nmi_w));
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m_fdc->set_force_ready(true);
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FLOPPY_CONNECTOR(config, m_floppy0, os9_floppies, "525qd", floppy_image_device::default_floppy_formats).enable_sound(true);
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FLOPPY_CONNECTOR(config, m_floppy1, os9_floppies, "525qd", floppy_image_device::default_floppy_formats).enable_sound(true);
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FLOPPY_CONNECTOR(config, m_floppy[0], "525qd", FLOPPY_525_QD, true, bbc_cumana68k_device::floppy_formats).enable_sound(true);
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FLOPPY_CONNECTOR(config, m_floppy[1], "525qd", FLOPPY_525_QD, true, bbc_cumana68k_device::floppy_formats).enable_sound(true);
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FLOPPY_CONNECTOR(config, m_floppy[2], "525qd", FLOPPY_525_QD, false, bbc_cumana68k_device::floppy_formats).enable_sound(true);
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FLOPPY_CONNECTOR(config, m_floppy[3], "525qd", FLOPPY_525_QD, false, bbc_cumana68k_device::floppy_formats).enable_sound(true);
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/* scsi */
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//MCFG_DEVICE_ADD("sasi", SCSI_PORT, 0)
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//MCFG_SCSI_DATA_INPUT_BUFFER("scsi_data_in")
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//MCFG_SCSI_SEL_HANDLER(WRITELINE(*this, bbc_cumana68k_device, write_sasi_sel))
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//MCFG_SCSI_IO_HANDLER(WRITELINE(*this, bbc_cumana68k_device, write_sasi_io))
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//MCFG_SCSI_BSY_HANDLER(WRITELINE(*this, bbc_cumana68k_device, write_sasi_bsy))
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//MCFG_SCSI_CD_HANDLER(WRITELINE(*this, bbc_cumana68k_device, write_sasi_cd))
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//MCFG_SCSI_MSG_HANDLER(WRITELINE(*this, bbc_cumana68k_device, write_sasi_msg))
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//MCFG_SCSI_REQ_HANDLER(WRITELINE(*this, bbc_cumana68k_device, write_sasi_req))
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//MCFG_SCSI_ACK_HANDLER(WRITELINE("pia_sasi", pia6821_device, ca2_w))
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//MCFG_SCSIDEV_ADD("sasi:" SCSI_PORT_DEVICE1, "harddisk", SCSIHD, SCSI_ID_0)
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/* sasi */
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SCSI_PORT(config, m_sasibus);
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m_sasibus->set_data_input_buffer(m_sasi_data_in);
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m_sasibus->sel_handler().set(m_pia_sasi, FUNC(pia6821_device::pb1_w));
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m_sasibus->io_handler().set(m_pia_sasi, FUNC(pia6821_device::pb2_w));
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m_sasibus->bsy_handler().set(m_pia_sasi, FUNC(pia6821_device::pb3_w));
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m_sasibus->cd_handler().set(m_pia_sasi, FUNC(pia6821_device::pb4_w));
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m_sasibus->msg_handler().set(m_pia_sasi, FUNC(pia6821_device::pb5_w));
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m_sasibus->req_handler().set(m_pia_sasi, FUNC(pia6821_device::pb7_w));
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m_sasibus->req_handler().append(m_pia_sasi, FUNC(pia6821_device::ca1_w));
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m_sasibus->ack_handler().set(m_pia_sasi, FUNC(pia6821_device::ca2_w));
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m_sasibus->set_slot_device(1, "harddisk", SCSIHD, DEVICE_INPUT_DEFAULTS_NAME(SCSI_ID_0));
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//MCFG_SCSI_OUTPUT_LATCH_ADD("scsi_data_out", "sasi")
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//MCFG_DEVICE_ADD("scsi_data_in", INPUT_BUFFER, 0)
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OUTPUT_LATCH(config, m_sasi_data_out);
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m_sasibus->set_output_latch(*m_sasi_data_out);
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INPUT_BUFFER(config, m_sasi_data_in);
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PIA6821(config, m_pia_sasi, 0);
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m_pia_sasi->readpa_handler().set(FUNC(bbc_cumana68k_device::pia_sasi_pa_r));
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m_pia_sasi->readpb_handler().set(FUNC(bbc_cumana68k_device::pia_sasi_pb_r));
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m_pia_sasi->readcb1_handler().set(FUNC(bbc_cumana68k_device::pia_sasi_cb1_r));
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//m_pia_sasi->cb2_handler().set(m_scsibus, FUNC(scsi_port_device::write_rst));
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m_pia_sasi->readpa_handler().set(m_sasi_data_in, FUNC(input_buffer_device::bus_r));
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m_pia_sasi->writepa_handler().set(m_sasi_data_out, FUNC(output_latch_device::bus_w));
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m_pia_sasi->writepb_handler().set(FUNC(bbc_cumana68k_device::pia_sasi_pb_w));
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m_pia_sasi->readcb1_handler().set_constant(1); // tied to +5V
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m_pia_sasi->cb2_handler().set(m_sasibus, FUNC(scsi_port_device::write_rst));
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m_pia_sasi->irqa_handler().set(m_irqs, FUNC(input_merger_device::in_w<0>));
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m_pia_sasi->irqb_handler().set(m_irqs, FUNC(input_merger_device::in_w<1>));
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@ -97,11 +101,13 @@ void bbc_cumana68k_device::device_add_mconfig(machine_config &config)
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m_pia_rtc->readpa_handler().set(m_rtc, FUNC(mc146818_device::read));
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m_pia_rtc->writepa_handler().set(m_rtc, FUNC(mc146818_device::write));
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m_pia_rtc->writepb_handler().set(FUNC(bbc_cumana68k_device::pia_rtc_pb_w));
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//m_pia_rtc->cb2_handler().set(m_scsibus, FUNC(scsi_port_device::write_rst));
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m_pia_rtc->ca2_handler().set(FUNC(bbc_cumana68k_device::rtc_ce_w));
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m_pia_rtc->cb2_handler().set(FUNC(bbc_cumana68k_device::reset68008_w));
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m_pia_rtc->irqa_handler().set(m_irqs, FUNC(input_merger_device::in_w<2>));
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m_pia_rtc->irqb_handler().set(m_irqs, FUNC(input_merger_device::in_w<3>));
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INPUT_MERGER_ANY_HIGH(config, m_irqs).output_handler().set(FUNC(bbc_cumana68k_device::intrq_w));
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INPUT_MERGER_ANY_HIGH(config, m_irqs).output_handler().set(DEVICE_SELF_OWNER, FUNC(bbc_internal_slot_device::irq_w));
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m_irqs->output_handler().append_inputline(m_m68008, M68K_IRQ_2);
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/* rtc */
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MC146818(config, m_rtc, 32.768_kHz_XTAL);
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@ -131,18 +137,16 @@ const tiny_rom_entry *bbc_cumana68k_device::device_rom_region() const
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bbc_cumana68k_device::bbc_cumana68k_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
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: device_t(mconfig, BBC_CUMANA68K, tag, owner, clock)
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, device_bbc_internal_interface(mconfig, *this)
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, m_maincpu(*this, ":maincpu")
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, m_m68008(*this, "m68008")
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, m_pia_sasi(*this, "pia_sasi")
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, m_pia_rtc(*this, "pia_rtc")
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, m_irqs(*this, "irqs")
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, m_rtc(*this, "rtc")
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, m_fdc(*this, "wd2797")
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, m_floppy0(*this, "wd2797:0")
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, m_floppy1(*this, "wd2797:1")
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//, m_scsibus(*this, "sasi")
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//, m_scsi_data_out(*this, "scsi_data_out")
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//, m_scsi_data_in(*this, "scsi_data_in")
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, m_floppy(*this, "wd2797:%u", 0)
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, m_sasibus(*this, "sasibus")
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, m_sasi_data_out(*this, "sasi_data_out")
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, m_sasi_data_in(*this, "sasi_data_in")
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{
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}
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@ -151,27 +155,28 @@ bbc_cumana68k_device::bbc_cumana68k_device(const machine_config &mconfig, const
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//-------------------------------------------------
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void bbc_cumana68k_device::device_start()
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{
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}
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//-------------------------------------------------
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// device_reset - device-specific reset
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//-------------------------------------------------
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void bbc_cumana68k_device::device_reset()
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{
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address_space &program = m_maincpu->space(AS_PROGRAM);
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program.install_readwrite_handler(0xfc40, 0xfc43, read8sm_delegate(*m_pia_sasi, FUNC(pia6821_device::read)), write8sm_delegate(*m_pia_sasi, FUNC(pia6821_device::write)));
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program.install_readwrite_handler(0xfc44, 0xfc47, read8sm_delegate(*m_pia_rtc, FUNC(pia6821_device::read)), write8sm_delegate(*m_pia_rtc, FUNC(pia6821_device::write)));
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program.install_readwrite_handler(0xfc48, 0xfc4b, read8sm_delegate(*m_fdc, FUNC(wd2797_device::read)), write8sm_delegate(*m_fdc, FUNC(wd2797_device::write)));
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program.install_write_handler(0xfc4c, 0xfc4f, write8sm_delegate(*this, FUNC(bbc_cumana68k_device::fsel_w)));
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/* register for save states */
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save_item(NAME(m_mc146818_as));
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save_item(NAME(m_mc146818_ds));
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save_item(NAME(m_mc146818_rw));
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save_item(NAME(m_masknmi));
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}
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//-------------------------------------------------
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// device_reset_after_children - reset after child devices
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//-------------------------------------------------
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void bbc_cumana68k_device::device_reset_after_children()
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{
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m_bEnabled = false;
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// Pull up resistor R12 makes CB2 high when it's configured as an input, so set CB2 as output and high to compensate
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/* Pull up resistor R12 makes CB2 high when it's configured as an input, so set CB2 as output and high to compensate */
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m_pia_rtc->write(0x03, 0x3c);
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}
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@ -182,149 +187,118 @@ void bbc_cumana68k_device::device_reset_after_children()
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WRITE_LINE_MEMBER(bbc_cumana68k_device::reset68008_w)
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{
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if (!state) m_bEnabled = true;
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m_m68008->set_input_line(INPUT_LINE_HALT, state);
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m_m68008->set_input_line(INPUT_LINE_RESET, state);
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}
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READ8_MEMBER(bbc_cumana68k_device::dma_r)
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void bbc_cumana68k_device::fsel_w(offs_t offset, uint8_t data)
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{
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/* TODO: what does FSEL actually do? seems to affect the floppy FCLK */
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//logerror("fsel_w %02x\n", data);
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}
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READ8_MEMBER(bbc_cumana68k_device::mem6502_r)
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{
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uint8_t data = 0xff;
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address_space &program = m_maincpu->space(AS_PROGRAM);
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switch (offset & 0xf000)
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{
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case 0x0000:
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data = program.read_byte(offset | 0x2000);
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break;
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case 0x2000:
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data = program.read_byte(offset & 0x0fff);
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break;
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default:
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data = program.read_byte(offset);
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break;
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}
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return data;
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}
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WRITE8_MEMBER(bbc_cumana68k_device::mem6502_w)
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{
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address_space &program = m_maincpu->space(AS_PROGRAM);
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if (m_bEnabled)
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switch (offset & 0xf000)
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{
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if (offset < 0x1000)
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return program.read_byte(offset + 0x2000);
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else if (offset > 0x1fff && offset < 0x3000)
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return program.read_byte(offset - 0x2000);
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else
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return program.read_byte(offset);
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}
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return 0xff;
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}
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WRITE8_MEMBER(bbc_cumana68k_device::dma_w)
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{
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address_space &program = m_maincpu->space(AS_PROGRAM);
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if (m_bEnabled)
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{
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if (offset < 0x1000)
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program.write_byte(offset + 0x2000, data);
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else if (offset > 0x1fff && offset < 0x3000)
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program.write_byte(offset - 0x2000, data);
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else
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case 0x0000:
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program.write_byte(offset | 0x2000, data);
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break;
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case 0x2000:
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program.write_byte(offset & 0x0fff, data);
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break;
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default:
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program.write_byte(offset, data);
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break;
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}
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}
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WRITE_LINE_MEMBER(bbc_cumana68k_device::rtc_ce_w)
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{
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m_mc146818_ce = state;
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mc146818_set();
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}
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void bbc_cumana68k_device::mc146818_set()
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{
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/* if chip enabled */
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if (m_mc146818_ce)
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{
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/* if data select is set then access the data in the 146818 */
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if (m_mc146818_ds)
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{
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if (m_mc146818_rw)
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{
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m_pia_rtc->set_a_input(m_rtc->read(1));
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}
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else
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{
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m_rtc->write(1, m_pia_rtc->a_output());
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}
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}
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/* if address select is set then set the address in the 146818 */
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if (m_mc146818_as)
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{
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m_rtc->write(0, m_pia_rtc->a_output());
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}
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}
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}
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WRITE8_MEMBER(bbc_cumana68k_device::pia_rtc_pb_w)
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{
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floppy_image_device *floppy = nullptr;
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logerror("pia1_pb_w %02x\n", data);
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// bit 0, 1: drive select
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switch (data & 0x03)
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{
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case 0: floppy = m_floppy0->get_device(); break;
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case 1: floppy = m_floppy1->get_device(); break;
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}
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/* bit 0, 1: drive select */
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floppy_image_device *floppy = m_floppy[data & 0x03]->get_device();
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m_fdc->set_floppy(floppy);
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// bit 2: motor enable
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/* bit 2: motor enable */
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if (floppy)
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floppy->mon_w(BIT(data, 2));
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// bit 3: density
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/* bit 3: density */
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m_fdc->dden_w(BIT(data, 3));
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// bit 4: enable precomp
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/* bit 4: enable precomp */
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/* bit 5, 6, 7: rtc */
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m_mc146818_as = BIT(data, 5);
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m_mc146818_ds = BIT(data, 6);
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m_mc146818_rw = BIT(data, 7);
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mc146818_set();
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}
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WRITE_LINE_MEMBER(bbc_cumana68k_device::intrq_w)
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WRITE8_MEMBER(bbc_cumana68k_device::pia_sasi_pb_w)
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{
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//m_m68008->set_input_line_and_vector(M68K_IRQ_2, state ? ASSERT_LINE : CLEAR_LINE, M68K_INT_ACK_AUTOVECTOR);
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m_m68008->set_input_line(M68K_IRQ_2, state);
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m_slot->irq_w(state);
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}
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WRITE_LINE_MEMBER(bbc_cumana68k_device::drq_w)
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{
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m_pia_sasi_pb &= ~0x40;
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m_pia_sasi_pb |= state << 6;
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//m_m68008->set_input_line(M68K_IRQ_7, state);
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m_slot->nmi_w(!state);
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}
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IRQ_CALLBACK_MEMBER(bbc_cumana68k_device::irq_callback)
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{
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//m_m68008->set_input_line(M68K_IRQ_2, CLEAR_LINE);
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// see https://github.com/mamedev/mame/commit/e39802db90860d6628c35265f7c78ce3534f5a53
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return 0; //M68K_INT_ACK_AUTOVECTOR;
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}
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WRITE_LINE_MEMBER(bbc_cumana68k_device::write_sasi_sel)
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{
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m_pia_sasi_pb &= ~0x02;
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m_pia_sasi_pb |= state << 1;
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}
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WRITE_LINE_MEMBER(bbc_cumana68k_device::write_sasi_io)
|
||||
{
|
||||
m_pia_sasi_pb &= ~0x04;
|
||||
m_pia_sasi_pb |= state << 2;
|
||||
}
|
||||
|
||||
WRITE_LINE_MEMBER(bbc_cumana68k_device::write_sasi_bsy)
|
||||
{
|
||||
m_pia_sasi_pb &= ~0x08;
|
||||
m_pia_sasi_pb |= state << 3;
|
||||
}
|
||||
|
||||
WRITE_LINE_MEMBER(bbc_cumana68k_device::write_sasi_cd)
|
||||
{
|
||||
m_pia_sasi_pb &= ~0x10;
|
||||
m_pia_sasi_pb |= state << 4;
|
||||
}
|
||||
|
||||
WRITE_LINE_MEMBER(bbc_cumana68k_device::write_sasi_msg)
|
||||
{
|
||||
m_pia_sasi_pb &= ~0x20;
|
||||
m_pia_sasi_pb |= state << 5;
|
||||
}
|
||||
|
||||
WRITE_LINE_MEMBER(bbc_cumana68k_device::write_sasi_req)
|
||||
{
|
||||
m_pia_sasi_pb &= ~0x40;
|
||||
m_pia_sasi_pb |= state << 6;
|
||||
|
||||
m_pia_sasi->ca1_w(state);
|
||||
}
|
||||
|
||||
|
||||
READ8_MEMBER(bbc_cumana68k_device::pia_sasi_pa_r)
|
||||
{
|
||||
return 0; // m_scsi_data_in->read();
|
||||
}
|
||||
|
||||
WRITE8_MEMBER(bbc_cumana68k_device::pia_sasi_pa_w)
|
||||
{
|
||||
//m_scsi_data_out->write(data);
|
||||
}
|
||||
|
||||
|
||||
READ8_MEMBER(bbc_cumana68k_device::pia_sasi_pb_r)
|
||||
{
|
||||
return m_pia_sasi_pb;
|
||||
}
|
||||
|
||||
READ_LINE_MEMBER(bbc_cumana68k_device::pia_sasi_cb1_r)
|
||||
{
|
||||
// CB1 is tied to +5V
|
||||
return 1;
|
||||
/* bit 0: masknmi */
|
||||
m_masknmi = BIT(data, 0);
|
||||
}
|
||||
|
||||
@ -19,6 +19,7 @@
|
||||
#include "machine/mc146818.h"
|
||||
#include "imagedev/floppy.h"
|
||||
#include "machine/wd_fdc.h"
|
||||
#include "formats/os9_dsk.h"
|
||||
#include "bus/scsi/scsi.h"
|
||||
|
||||
//**************************************************************************
|
||||
@ -33,25 +34,17 @@ public:
|
||||
// construction/destruction
|
||||
bbc_cumana68k_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
|
||||
|
||||
DECLARE_WRITE_LINE_MEMBER(write_sasi_sel);
|
||||
DECLARE_WRITE_LINE_MEMBER(write_sasi_msg);
|
||||
DECLARE_WRITE_LINE_MEMBER(write_sasi_bsy);
|
||||
DECLARE_WRITE_LINE_MEMBER(write_sasi_req);
|
||||
DECLARE_WRITE_LINE_MEMBER(write_sasi_io);
|
||||
DECLARE_WRITE_LINE_MEMBER(write_sasi_cd);
|
||||
DECLARE_READ8_MEMBER(pia_sasi_pa_r);
|
||||
DECLARE_WRITE8_MEMBER(pia_sasi_pa_w);
|
||||
DECLARE_READ8_MEMBER(pia_sasi_pb_r);
|
||||
DECLARE_READ_LINE_MEMBER(pia_sasi_cb1_r);
|
||||
DECLARE_WRITE8_MEMBER(pia_rtc_pb_w);
|
||||
DECLARE_WRITE8_MEMBER(pia_sasi_pb_w);
|
||||
|
||||
DECLARE_READ8_MEMBER(dma_r);
|
||||
DECLARE_WRITE8_MEMBER(dma_w);
|
||||
DECLARE_READ8_MEMBER(mem6502_r);
|
||||
DECLARE_WRITE8_MEMBER(mem6502_w);
|
||||
|
||||
DECLARE_FLOPPY_FORMATS(floppy_formats);
|
||||
|
||||
protected:
|
||||
// device-level overrides
|
||||
virtual void device_start() override;
|
||||
virtual void device_reset() override;
|
||||
virtual void device_reset_after_children() override;
|
||||
|
||||
// optional information overrides
|
||||
@ -59,28 +52,31 @@ protected:
|
||||
virtual const tiny_rom_entry *device_rom_region() const override;
|
||||
|
||||
private:
|
||||
DECLARE_WRITE_LINE_MEMBER(intrq_w);
|
||||
DECLARE_WRITE_LINE_MEMBER(drq_w);
|
||||
DECLARE_WRITE_LINE_MEMBER(reset68008_w);
|
||||
IRQ_CALLBACK_MEMBER(irq_callback);
|
||||
DECLARE_WRITE_LINE_MEMBER(rtc_ce_w);
|
||||
|
||||
required_device<cpu_device> m_maincpu;
|
||||
required_device<m68000_base_device> m_m68008;
|
||||
required_device<pia6821_device> m_pia_sasi;
|
||||
required_device<pia6821_device> m_pia_rtc;
|
||||
required_device<input_merger_device> m_irqs;
|
||||
required_device<mc146818_device> m_rtc;
|
||||
required_device<wd2797_device> m_fdc;
|
||||
required_device<floppy_connector> m_floppy0;
|
||||
optional_device<floppy_connector> m_floppy1;
|
||||
//required_device<scsi_port_device> m_scsibus;
|
||||
//required_device<output_latch_device> m_scsi_data_out;
|
||||
//required_device<input_buffer_device> m_scsi_data_in;
|
||||
required_device_array<floppy_connector, 4> m_floppy;
|
||||
required_device<scsi_port_device> m_sasibus;
|
||||
required_device<output_latch_device> m_sasi_data_out;
|
||||
required_device<input_buffer_device> m_sasi_data_in;
|
||||
|
||||
void cumana68k_mem(address_map &map);
|
||||
|
||||
bool m_bEnabled;
|
||||
uint8_t m_pia_sasi_pb;
|
||||
void fsel_w(offs_t offset, uint8_t data);
|
||||
|
||||
int m_masknmi;
|
||||
|
||||
void mc146818_set();
|
||||
int m_mc146818_as;
|
||||
int m_mc146818_ds;
|
||||
int m_mc146818_rw;
|
||||
int m_mc146818_ce;
|
||||
};
|
||||
|
||||
|
||||
|
||||
@ -204,6 +204,7 @@ void bbcb_internal_devices(device_slot_interface &device)
|
||||
void bbcbp_internal_devices(device_slot_interface &device)
|
||||
{
|
||||
device.option_add("atplswp", BBC_ATPLSWP); /* ATPL Sidewise+ ROM expansion */
|
||||
device.option_add("cumana68k", BBC_CUMANA68K); /* Cumana 68008 2nd Processor */
|
||||
}
|
||||
|
||||
void bbcm_internal_devices(device_slot_interface &device)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user