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Diffstat (limited to 'src/mame/dms/dms86.cpp')
-rw-r--r-- | src/mame/dms/dms86.cpp | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/src/mame/dms/dms86.cpp b/src/mame/dms/dms86.cpp new file mode 100644 index 00000000000..9c8a9530fd6 --- /dev/null +++ b/src/mame/dms/dms86.cpp @@ -0,0 +1,193 @@ +// license:BSD-3-Clause +// copyright-holders:Robbbert +/*************************************************************************** + +Digital Microsystems DMS-86 + +2010-01-11 Skeleton driver. + +Monitor commands: +A Display incoming terminal data in hex +B boot to HiNet +C copy memory +D dump memory to screen +F fill memory +G go (eg G address [breakpoint]) +I in port +M memory test +O out port (e.g. O 84 77) +P set segment +S write a byte to memory +T type ascii string into the address set by D or S +X display registers +? help +: load intel hex format file + + +Note that bit 3 of port 82 is tested at boot. If low, the computer bypasses +the monitor and goes straight to "Joining HiNet". + +****************************************************************************/ + +#include "emu.h" +#include "cpu/i86/i86.h" +#include "machine/z80ctc.h" +#include "machine/z80sio.h" +#include "machine/clock.h" +#include "bus/rs232/rs232.h" +#include "machine/terminal.h" + + +namespace { + +class dms86_state : public driver_device +{ +public: + dms86_state(const machine_config &mconfig, device_type type, const char *tag) + : driver_device(mconfig, type, tag) + , m_maincpu(*this, "maincpu") + , m_terminal(*this, "terminal") + , m_sio(*this, "sio%u", 1U) + , m_ctc(*this, "ctc") + { } + + void dms86(machine_config &config); + void nmi_w(int state); + +protected: + virtual void machine_start() override ATTR_COLD; + +private: + void m1_ack_w(u8 data); + + u16 port9a_r(); + u16 port9c_r(); + void kbd_put(u8 data); + + void io_map(address_map &map) ATTR_COLD; + void mem_map(address_map &map) ATTR_COLD; + + u8 m_term_data = 0U; + required_device<cpu_device> m_maincpu; + required_device<generic_terminal_device> m_terminal; + required_device_array<z80sio_device, 2> m_sio; + required_device<z80ctc_device> m_ctc; +}; + + +void dms86_state::nmi_w(int state) +{ + m_maincpu->set_input_line(INPUT_LINE_NMI, state); +} + + +void dms86_state::m1_ack_w(u8 data) +{ + m_sio[0]->z80daisy_decode(data); + m_sio[1]->z80daisy_decode(data); + m_ctc->z80daisy_decode(data); +} + + +u16 dms86_state::port9a_r() +{ + return m_term_data ? 0x40 : 0; +} + +u16 dms86_state::port9c_r() +{ + u8 ret = m_term_data; + m_term_data = 0; + return ret; +} + + +void dms86_state::mem_map(address_map &map) +{ + map.unmap_value_high(); + map(0x00000, 0x1ffff).ram(); + map(0xfe000, 0xfffff).rom().region("roms", 0); + map(0xfed03, 0xfed03).w(FUNC(dms86_state::m1_ack_w)); +} + +void dms86_state::io_map(address_map &map) +{ + map.unmap_value_high(); + map.global_mask(0xff); + map(0x80, 0x87).rw(m_sio[0], FUNC(z80sio_device::ba_cd_r), FUNC(z80sio_device::ba_cd_w)).umask16(0x00ff); + map(0x88, 0x8f).rw(m_ctc, FUNC(z80ctc_device::read), FUNC(z80ctc_device::write)).umask16(0x00ff); + map(0x90, 0x97).rw(m_sio[1], FUNC(z80sio_device::ba_cd_r), FUNC(z80sio_device::ba_cd_w)).umask16(0x00ff); + //map(0x98, 0x99) // r SASI data read ; w SASI SEL probe + map(0x9A, 0x9B).r(FUNC(dms86_state::port9a_r)); // r parallel ports, status byte ; w SASI ACK strobe, SASI data write + // 9C,9D - no setup bytes; meant for printer // r Port P data read ; Port P data write + map(0x9c, 0x9d).r(FUNC(dms86_state::port9c_r)); + map(0x9c, 0x9c).w(m_terminal, FUNC(generic_terminal_device::write)); + //map(0x9e, 0x9f) // r SASI software reset ; w Port P AUX strobe +} + +/* Input ports */ +static INPUT_PORTS_START( dms86 ) + PORT_START("FRONT") + PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_OTHER) PORT_NAME("Interrupt") PORT_CODE(KEYCODE_F2) PORT_WRITE_LINE_MEMBER(FUNC(dms86_state::nmi_w)) +INPUT_PORTS_END + + +void dms86_state::machine_start() +{ + save_item(NAME(m_term_data)); + + m_term_data = 0; +} + +void dms86_state::kbd_put(u8 data) +{ + m_term_data = data; +} + +void dms86_state::dms86(machine_config &config) +{ + /* basic machine hardware */ + I8086(config, m_maincpu, XTAL(14'745'600) / 3); // according to the manual... hmm + m_maincpu->set_addrmap(AS_PROGRAM, &dms86_state::mem_map); + m_maincpu->set_addrmap(AS_IO, &dms86_state::io_map); + + // According to the manual the clock is 14,765,600 / 4 but that's wrong + Z80CTC(config, m_ctc, XTAL(14'745'600) / 3); + //m_ctc->intr_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ0); // frame rate interrupt to maincpu + m_ctc->zc_callback<0>().set(m_sio[0], FUNC(z80sio_device::rxtxcb_w)); // SIO1 Ch B + m_ctc->zc_callback<1>().set(m_sio[0], FUNC(z80sio_device::txca_w)); // SIO1 Ch A + m_ctc->zc_callback<1>().append(m_sio[0], FUNC(z80sio_device::rxca_w)); + m_ctc->zc_callback<2>().set(m_sio[1], FUNC(z80sio_device::rxtxcb_w)); // SIO2 + m_ctc->zc_callback<2>().append(m_sio[1], FUNC(z80sio_device::rxca_w)); + m_ctc->zc_callback<2>().append(m_sio[1], FUNC(z80sio_device::rxca_w)); + + Z80SIO(config, m_sio[0], XTAL(14'745'600) / 3); + m_sio[0]->out_txdb_callback().set("rs232", FUNC(rs232_port_device::write_txd)); + m_sio[0]->out_dtrb_callback().set("rs232", FUNC(rs232_port_device::write_dtr)); + m_sio[0]->out_rtsb_callback().set("rs232", FUNC(rs232_port_device::write_rts)); + + Z80SIO(config, m_sio[1], XTAL(14'745'600) / 3); + + rs232_port_device &rs232(RS232_PORT(config, "rs232", default_rs232_devices, nullptr)); + rs232.rxd_handler().set(m_sio[0], FUNC(z80sio_device::rxb_w)); + rs232.dcd_handler().set(m_sio[0], FUNC(z80sio_device::dcdb_w)); // HiNet / Monitor switch + rs232.cts_handler().set(m_sio[0], FUNC(z80sio_device::ctsb_w)).invert(); + + GENERIC_TERMINAL(config, m_terminal, 0); + m_terminal->set_keyboard_callback(FUNC(dms86_state::kbd_put)); +} + +/* ROM definition */ +ROM_START( dms86 ) + ROM_REGION16_LE( 0x2000, "roms", ROMREGION_ERASEFF ) + ROM_LOAD16_BYTE( "hns-86_54-8678.bin", 0x0000, 0x1000, CRC(95f58e1c) SHA1(6fc8f087f0c887d8b429612cd035c6c1faab570c)) + ROM_LOAD16_BYTE( "hns-86_54-8677.bin", 0x0001, 0x1000, CRC(78fad756) SHA1(ddcbff1569ec6975b8489935cdcfa80eba413502)) +ROM_END + +} // Anonymous namespace + + +/* Driver */ + +/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */ +COMP( 1982, dms86, 0, 0, dms86, dms86, dms86_state, empty_init, "Digital Microsystems", "DMS-86", MACHINE_NOT_WORKING | MACHINE_NO_SOUND_HW | MACHINE_SUPPORTS_SAVE ) |