diff options
Diffstat (limited to 'src/devices/bus/isa/bblue2.cpp')
-rw-r--r-- | src/devices/bus/isa/bblue2.cpp | 253 |
1 files changed, 253 insertions, 0 deletions
diff --git a/src/devices/bus/isa/bblue2.cpp b/src/devices/bus/isa/bblue2.cpp new file mode 100644 index 00000000000..58ef846a897 --- /dev/null +++ b/src/devices/bus/isa/bblue2.cpp @@ -0,0 +1,253 @@ +// license:BSD-3-Clause +// copyright-holders:Barry Rodewald +/* + * Microlog Baby Blue II CPU Plus + * + * ISA card used to emulate CP/M-80 on a PC or XT + * Includes a Z80B CPU, 2 DB25 RS-232C serial ports (8250), a Centronics parallel port, and an RTC + * + * Issues: + * RTC type is unknown + * Z80 location test and Interrupt test sometimes fail + * Parallel port test fails if set to LPT2 + */ + +#include "emu.h" + +#include "bblue2.h" +#include "bus/rs232/terminal.h" +#include "bus/rs232/null_modem.h" + +//************************************************************************** +// GLOBAL VARIABLES +//************************************************************************** + +DEFINE_DEVICE_TYPE(ISA8_BABYBLUE2, isa8_babyblue2_device, "isa_bblue2", "Microlog Baby Blue II CPU Plus") + +static void isa_com(device_slot_interface &device) +{ +// device.option_add("microsoft_mouse", MSFT_HLE_SERIAL_MOUSE); +// device.option_add("logitech_mouse", LOGITECH_HLE_SERIAL_MOUSE); +// device.option_add("wheel_mouse", WHEEL_HLE_SERIAL_MOUSE); +// device.option_add("msystems_mouse", MSYSTEMS_HLE_SERIAL_MOUSE); +// device.option_add("rotatable_mouse", ROTATABLE_HLE_SERIAL_MOUSE); + device.option_add("terminal", SERIAL_TERMINAL); + device.option_add("null_modem", NULL_MODEM); +// device.option_add("sun_kbd", SUN_KBD_ADAPTOR); +} + +void isa8_babyblue2_device::z80_program_map(address_map &map) +{ + map(0x0000, 0xffff).ram().rw(FUNC(isa8_babyblue2_device::z80_ram_r),FUNC(isa8_babyblue2_device::z80_ram_w)); +} + +void isa8_babyblue2_device::z80_io_map(address_map &map) +{ + map(0x0030, 0x0037).rw(m_serial2, FUNC(ins8250_device::ins8250_r), FUNC(ins8250_device::ins8250_w)); + // 0x40-0x47 - RTC + map(0x0070, 0x0077).rw(m_serial1, FUNC(ins8250_device::ins8250_r), FUNC(ins8250_device::ins8250_w)); + // LPT mapped at reset +} + +//------------------------------------------------- +// device_add_mconfig - add device configuration +//------------------------------------------------- + +void isa8_babyblue2_device::device_add_mconfig(machine_config &config) +{ + Z80(config, m_z80, 6_MHz_XTAL); + m_z80->set_addrmap(AS_PROGRAM, &isa8_babyblue2_device::z80_program_map); + m_z80->set_addrmap(AS_IO, &isa8_babyblue2_device::z80_io_map); + + RAM(config, m_ram); + m_ram->set_default_size("64k"); + + INS8250(config, m_serial1, XTAL(1'843'200)); + m_serial1->out_tx_callback().set("rs232_1", FUNC(rs232_port_device::write_txd)); + m_serial1->out_dtr_callback().set("rs232_1", FUNC(rs232_port_device::write_dtr)); + m_serial1->out_rts_callback().set("rs232_1", FUNC(rs232_port_device::write_rts)); + m_serial1->out_int_callback().set(FUNC(isa8_babyblue2_device::port1_irq)); + INS8250(config, m_serial2, XTAL(1'843'200)); + m_serial2->out_tx_callback().set("rs232_2", FUNC(rs232_port_device::write_txd)); + m_serial2->out_dtr_callback().set("rs232_2", FUNC(rs232_port_device::write_dtr)); + m_serial2->out_rts_callback().set("rs232_2", FUNC(rs232_port_device::write_rts)); + m_serial2->out_int_callback().set(FUNC(isa8_babyblue2_device::port2_irq)); + + RS232_PORT(config, m_rs232_1, isa_com, nullptr); + m_rs232_1->rxd_handler().set(m_serial1, FUNC(ins8250_uart_device::rx_w)); + m_rs232_1->dcd_handler().set(m_serial1, FUNC(ins8250_uart_device::dcd_w)); + m_rs232_1->dsr_handler().set(m_serial1, FUNC(ins8250_uart_device::dsr_w)); + m_rs232_1->ri_handler().set(m_serial1, FUNC(ins8250_uart_device::ri_w)); + m_rs232_1->cts_handler().set(m_serial1, FUNC(ins8250_uart_device::cts_w)); + RS232_PORT(config, m_rs232_2, isa_com, nullptr); + m_rs232_2->rxd_handler().set(m_serial2, FUNC(ins8250_uart_device::rx_w)); + m_rs232_2->dcd_handler().set(m_serial2, FUNC(ins8250_uart_device::dcd_w)); + m_rs232_2->dsr_handler().set(m_serial2, FUNC(ins8250_uart_device::dsr_w)); + m_rs232_2->ri_handler().set(m_serial2, FUNC(ins8250_uart_device::ri_w)); + m_rs232_2->cts_handler().set(m_serial2, FUNC(ins8250_uart_device::cts_w)); + + PC_LPT(config, m_parallel); +} + + +static INPUT_PORTS_START( babyblue2 ) + PORT_START("SW1") + PORT_DIPNAME( 0x0f, 0x0e, "Z80 Memory and Port location" ) PORT_DIPLOCATION( "SW1:7,6,5,4" ) + PORT_DIPSETTING( 0x00, "Invalid?" ) + PORT_DIPSETTING( 0x01, "RAM: 10000 I/O: 302" ) + PORT_DIPSETTING( 0x02, "RAM: 20000 I/O: 304" ) + PORT_DIPSETTING( 0x03, "RAM: 30000 I/O: 306" ) + PORT_DIPSETTING( 0x04, "RAM: 40000 I/O: 308" ) + PORT_DIPSETTING( 0x05, "RAM: 50000 I/O: 30a" ) + PORT_DIPSETTING( 0x06, "RAM: 60000 I/O: 30c" ) + PORT_DIPSETTING( 0x07, "RAM: 70000 I/O: 30e" ) + PORT_DIPSETTING( 0x08, "RAM: 80000 I/O: 310" ) + PORT_DIPSETTING( 0x09, "RAM: 90000 I/O: 312" ) + PORT_DIPSETTING( 0x0a, "RAM: A0000 I/O: 314" ) + PORT_DIPSETTING( 0x0b, "RAM: B0000 I/O: 316" ) + PORT_DIPSETTING( 0x0c, "RAM: C0000 I/O: 318" ) + PORT_DIPSETTING( 0x0d, "RAM: D0000 I/O: 31a" ) + PORT_DIPSETTING( 0x0e, "RAM: E0000 I/O: 31c" ) + PORT_DIPSETTING( 0x0f, "RAM: F0000 I/O: 31f" ) + PORT_DIPUNKNOWN( 0x70, 0x00 ) PORT_DIPLOCATION( "SW1:3,2,1" ) + + // exact setting unknown at this stage + PORT_START("SW2") + PORT_DIPNAME( 0x07, 0x07, "Device Module Ports" ) PORT_DIPLOCATION( "SW2:3,2,1" ) + PORT_DIPSETTING( 0x00, "0x00" ) + PORT_DIPSETTING( 0x01, "0x01" ) + PORT_DIPSETTING( 0x02, "0x02" ) + PORT_DIPSETTING( 0x03, "0x03" ) + PORT_DIPSETTING( 0x04, "0x04" ) + PORT_DIPSETTING( 0x05, "0x05" ) + PORT_DIPSETTING( 0x06, "0x06" ) + PORT_DIPSETTING( 0x07, "0x07" ) + + // exact setting unknown at this stage + PORT_START("SW3") + PORT_DIPNAME( 0x0f, 0x0e, "RAM Module Page" ) PORT_DIPLOCATION( "SW3:7,6,5,4" ) + PORT_DIPSETTING( 0x00, "0x00" ) + PORT_DIPSETTING( 0x01, "0x01" ) + PORT_DIPSETTING( 0x02, "0x02" ) + PORT_DIPSETTING( 0x03, "0x03" ) + PORT_DIPSETTING( 0x04, "0x04" ) + PORT_DIPSETTING( 0x05, "0x05" ) + PORT_DIPSETTING( 0x06, "0x06" ) + PORT_DIPSETTING( 0x07, "0x07" ) + PORT_DIPSETTING( 0x08, "0x08" ) + PORT_DIPSETTING( 0x09, "0x09" ) + PORT_DIPSETTING( 0x0a, "0x0a" ) + PORT_DIPSETTING( 0x0b, "0x0b" ) + PORT_DIPSETTING( 0x0c, "0x0c" ) + PORT_DIPSETTING( 0x0d, "0x0d" ) + PORT_DIPSETTING( 0x0e, "0x0e" ) + PORT_DIPSETTING( 0x0f, "0x0f" ) + + PORT_DIPNAME(0x40, 0x40, "RAM Bank I" ) PORT_DIPLOCATION( "SW3:1" ) + PORT_DIPSETTING( 0x00, "Enabled" ) + PORT_DIPSETTING( 0x40, "Disabled" ) + PORT_DIPNAME(0x20, 0x40, "RAM Bank II" ) PORT_DIPLOCATION( "SW3:2" ) + PORT_DIPSETTING( 0x00, "Enabled" ) + PORT_DIPSETTING( 0x20, "Disabled" ) + PORT_DIPNAME(0x10, 0x40, "RAM Bank III" ) PORT_DIPLOCATION( "SW3:3" ) + PORT_DIPSETTING( 0x00, "Enabled" ) + PORT_DIPSETTING( 0x10, "Disabled" ) + + PORT_START("H2") + PORT_CONFNAME( 0x01, 0x01, "LPT port config" ) + PORT_CONFSETTING( 0x00, "LPT1" ) + PORT_CONFSETTING( 0x01, "LPT2" ) +INPUT_PORTS_END + +//------------------------------------------------- +// isa8_adlib_device - constructor +//------------------------------------------------- + +isa8_babyblue2_device::isa8_babyblue2_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) + : device_t(mconfig, ISA8_BABYBLUE2, tag, owner, clock) + , device_isa8_card_interface(mconfig, *this) + , m_z80(*this, "z80cpu") + , m_serial1(*this, "serial1") + , m_serial2(*this, "serial2") + , m_rs232_1(*this, "rs232_1") + , m_rs232_2(*this, "rs232_2") + , m_parallel(*this, "parallel") + , m_dsw1(*this, "SW1") + , m_dsw2(*this, "SW2") + , m_dsw3(*this, "SW3") + , m_h2(*this, "H2") + , m_ram(*this, "z80ram") + , m_devices_installed(false) +{ +} + +ioport_constructor isa8_babyblue2_device::device_input_ports() const +{ + return INPUT_PORTS_NAME( babyblue2 ); +} + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void isa8_babyblue2_device::device_start() +{ + set_isa_device(); +} + +//------------------------------------------------- +// device_reset - device-specific reset +//------------------------------------------------- + +void isa8_babyblue2_device::device_reset() +{ + uint32_t ramloc; + uint16_t ioloc, lptloc, z80lptloc; + + ramloc = (m_dsw1->read() & 0x0f) << 16; + ioloc = ((m_dsw1->read() & 0x0f) << 1) | 0x300; + lptloc = (m_h2->read() & 0x01) ? 0x278 : 0x378; + z80lptloc = (m_h2->read() & 0x01) ? 0x10 : 0x50; + + // halt Z80 + m_z80->set_input_line(INPUT_LINE_HALT, ASSERT_LINE); + + if(!m_devices_installed) // will need a hard reset to put DIP switch and jumper changes into effect + { + // map Z80 LPT port based on jumper setting + m_z80->space(AS_IO).install_readwrite_handler(z80lptloc, z80lptloc+7, read8sm_delegate(m_parallel, FUNC(pc_lpt_device::read)), write8sm_delegate(m_parallel, FUNC(pc_lpt_device::write))); + + m_isa->install_device(ioloc, ioloc+1, read8sm_delegate(*this, FUNC(isa8_babyblue2_device::z80_control_r)), write8sm_delegate(*this, FUNC(isa8_babyblue2_device::z80_control_w))); + m_isa->install_device(lptloc, lptloc+7, read8sm_delegate(m_parallel, FUNC(pc_lpt_device::read)), write8sm_delegate(m_parallel, FUNC(pc_lpt_device::write))); + m_isa->install_device(0x3f8, 0x03ff, read8sm_delegate(m_serial1, FUNC(ins8250_device::ins8250_r)), write8sm_delegate(m_serial1, FUNC(ins8250_device::ins8250_w))); + m_isa->install_device(0x2f8, 0x02ff, read8sm_delegate(m_serial2, FUNC(ins8250_device::ins8250_r)), write8sm_delegate(m_serial2, FUNC(ins8250_device::ins8250_w))); + // TODO: RTC + m_isa->install_memory(ramloc, ramloc+0xffff, read8sm_delegate(*this, FUNC(isa8_babyblue2_device::z80_ram_r)),write8sm_delegate(*this, FUNC(isa8_babyblue2_device::z80_ram_w))); + m_devices_installed = true; + } +} + +uint8_t isa8_babyblue2_device::z80_control_r(offs_t offset) +{ + logerror("Z80 control line read\b"); + return 0xff; +} + +void isa8_babyblue2_device::z80_control_w(offs_t offset, uint8_t data) +{ + if(offset == 0) + { + m_z80->set_input_line(INPUT_LINE_HALT, (data & 0x01) ? CLEAR_LINE : ASSERT_LINE); + m_z80->set_input_line(INPUT_LINE_IRQ0, (data & 0x04) ? ASSERT_LINE : CLEAR_LINE); + m_z80->set_input_line(INPUT_LINE_NMI, (data & 0x08) ? ASSERT_LINE : CLEAR_LINE); + logerror("Z80 control write: %02x\n",data); + } +} + +void isa8_babyblue2_device::lpt_irq(int state) +{ + if(m_h2->read() & 0x01) + m_isa->irq5_w(state); + else + m_isa->irq7_w(state); +} |