// license:BSD-3-Clause // copyright-holders:Carl // Slicer Computers Slicer 80186 SBC // The bios makefile refers to a "exe3bin" utility, this can be substituted with FreeDOS exe2bin and the /l=0xf800 option // which will fixup the relocations #include "emu.h" #include "cpu/i86/i186.h" #include "machine/wd_fdc.h" #include "machine/mc68681.h" #include "bus/rs232/rs232.h" #include "bus/isa/isa.h" #include "bus/scsi/scsi.h" class slicer_state : public driver_device { public: slicer_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag), m_fdc(*this, "fdc"), m_sasi(*this, "sasi") {} required_device m_fdc; required_device m_sasi; DECLARE_WRITE8_MEMBER(sio_out_w); DECLARE_WRITE8_MEMBER(drive_sel_w); }; WRITE8_MEMBER(slicer_state::sio_out_w) { floppy_image_device *floppy; int state = (data & 0x80) ? 0 : 1; char devname[8]; for(int i = 0; i < 4; i++) { sprintf(devname, "%d", i); floppy = m_fdc->subdevice(devname)->get_device(); if(floppy) floppy->mon_w(state); } } WRITE8_MEMBER(slicer_state::drive_sel_w) { data &= 1; switch(offset) { case 0: m_sasi->write_sel(data); break; case 1: m_sasi->write_rst(data); break; case 7: m_fdc->dden_w(data); break; default: { floppy_image_device *floppy; char devname[8]; unsigned int drive = 3 - (offset - 2); if((drive > 3) || !data) break; sprintf(devname, "%d", drive); floppy = m_fdc->subdevice(devname)->get_device(); m_fdc->set_floppy(floppy); break; } } } static ADDRESS_MAP_START( slicer_map, AS_PROGRAM, 16, slicer_state ) AM_RANGE(0x00000, 0x3ffff) AM_RAM // fixed 256k for now AM_RANGE(0xf8000, 0xfffff) AM_ROM AM_REGION("bios", 0) ADDRESS_MAP_END static ADDRESS_MAP_START( slicer_io, AS_IO, 16, slicer_state ) ADDRESS_MAP_UNMAP_HIGH AM_RANGE(0x0000, 0x007f) AM_DEVREADWRITE8("fdc", fd1797_t, read, write, 0x00ff) //PCS0 AM_RANGE(0x0080, 0x00ff) AM_DEVREADWRITE8("sc2681", mc68681_device, read, write, 0x00ff) //PCS1 AM_RANGE(0x0100, 0x017f) AM_WRITE8(drive_sel_w, 0x00ff) //PCS2 // TODO: 0x180 sets ack AM_RANGE(0x0180, 0x0181) AM_DEVREAD8("sasi_data_in", input_buffer_device, read, 0x00ff) AM_DEVWRITE8("sasi_data_out", output_latch_device, write, 0x00ff) //PCS3 AM_RANGE(0x0180, 0x0181) AM_DEVREAD8("sasi_ctrl_in", input_buffer_device, read, 0xff00) AM_RANGE(0x0184, 0x0185) AM_DEVREAD8("sasi_data_in", input_buffer_device, read, 0x00ff) AM_DEVWRITE8("sasi_data_out", output_latch_device, write, 0x00ff) AM_RANGE(0x0184, 0x0185) AM_DEVREAD8("sasi_ctrl_in", input_buffer_device, read, 0xff00) ADDRESS_MAP_END static SLOT_INTERFACE_START( slicer_floppies ) SLOT_INTERFACE("525dd", FLOPPY_525_DD) SLOT_INTERFACE("8dsdd", FLOPPY_8_DSDD) SLOT_INTERFACE_END static MACHINE_CONFIG_START( slicer, slicer_state ) MCFG_CPU_ADD("maincpu", I80186, XTAL_16MHz / 2) MCFG_CPU_PROGRAM_MAP(slicer_map) MCFG_CPU_IO_MAP(slicer_io) MCFG_MC68681_ADD("sc2681", XTAL_3_6864MHz) MCFG_MC68681_IRQ_CALLBACK(DEVWRITELINE("maincpu", i80186_cpu_device, int0_w)) MCFG_MC68681_A_TX_CALLBACK(DEVWRITELINE("rs232_1", rs232_port_device, write_txd)) MCFG_MC68681_B_TX_CALLBACK(DEVWRITELINE("rs232_2", rs232_port_device, write_txd)) MCFG_MC68681_OUTPORT_CALLBACK(WRITE8(slicer_state, sio_out_w)) MCFG_RS232_PORT_ADD("rs232_1", default_rs232_devices, "terminal") MCFG_RS232_RXD_HANDLER(DEVWRITELINE("sc2681", mc68681_device, rx_a_w)) MCFG_RS232_PORT_ADD("rs232_2", default_rs232_devices, NULL) MCFG_RS232_RXD_HANDLER(DEVWRITELINE("sc2681", mc68681_device, rx_b_w)) MCFG_FD1797_ADD("fdc", XTAL_16MHz/2/8) MCFG_WD_FDC_INTRQ_CALLBACK(DEVWRITELINE("maincpu", i80186_cpu_device, int1_w)) MCFG_WD_FDC_DRQ_CALLBACK(DEVWRITELINE("maincpu", i80186_cpu_device, drq0_w)) MCFG_FLOPPY_DRIVE_ADD("fdc:0", slicer_floppies, "525dd", floppy_image_device::default_floppy_formats) MCFG_FLOPPY_DRIVE_ADD("fdc:1", slicer_floppies, NULL, floppy_image_device::default_floppy_formats) MCFG_FLOPPY_DRIVE_ADD("fdc:2", slicer_floppies, NULL, floppy_image_device::default_floppy_formats) MCFG_FLOPPY_DRIVE_ADD("fdc:3", slicer_floppies, NULL, floppy_image_device::default_floppy_formats) MCFG_DEVICE_ADD("sasi", SCSI_PORT, 0) MCFG_SCSI_DATA_INPUT_BUFFER("sasi_data_in") MCFG_SCSI_BSY_HANDLER(DEVWRITELINE("sasi_ctrl_in", input_buffer_device, write_bit3)) MCFG_SCSI_MSG_HANDLER(DEVWRITELINE("sasi_ctrl_in", input_buffer_device, write_bit4)) MCFG_SCSI_CD_HANDLER(DEVWRITELINE("sasi_ctrl_in", input_buffer_device, write_bit5)) MCFG_SCSI_REQ_HANDLER(DEVWRITELINE("sasi_ctrl_in", input_buffer_device, write_bit6)) MCFG_SCSI_IO_HANDLER(DEVWRITELINE("sasi_ctrl_in", input_buffer_device, write_bit7)) MCFG_SCSI_OUTPUT_LATCH_ADD("sasi_data_out", "sasi") MCFG_DEVICE_ADD("sasi_data_in", INPUT_BUFFER, 0) MCFG_DEVICE_ADD("sasi_ctrl_in", INPUT_BUFFER, 0) MACHINE_CONFIG_END ROM_START( slicer ) ROM_REGION(0x8001, "bios", 0) // built from sources, reset.asm adds an extra byte ROM_LOAD("epbios.bin", 0x0000, 0x8001, CRC(96fe9dd4) SHA1(5fc43454fe7d51f2ae97aef822155dcd28eb7f23)) ROM_END COMP( 1983, slicer, 0, 0, slicer, 0, driver_device, 0, "Slicer Computers", "Slicer", MACHINE_NO_SOUND)