// license:BSD-3-Clause // copyright-holders:Robbbert /*************************************************************************** HP Z80-based unknown in a large metal cage 2012-05-25 Skeleton driver [Robbbert] http://www.classiccmp.org/hp/unknown Z80 computer/ Looks like roms are in 2 banks in range C000-FFFF. BASIC is included, if we can find out how to access it. Commands: Axxxx Disassemble (. to quit) DAxxxx,yyyy Ascii Dump of memory DBxxxx,yyyy Binary Dump of memory DHxxxx,yyyy Hex Dump of memory DOxxxx,yyyy Octal dump of memory G H L MMxxxx Modify Memory (. to quit) Pxx Binary Display of Port Pxx,xx Write to port RC ??? RF ??? RM ??? RT ??? UC Displays 11111111 US ??? UZ Displays FFFF W Punch papertape X choose Q,V,R,P (Q to quit; others ask for ram and prom ranges) Y nothing Z nothing ToDo: - Almost everything; there are a lot of I/O ports used - Hook up rom banking ****************************************************************************/ #include "emu.h" #include "cpu/z80/z80.h" #include "machine/ay31015.h" #include "bus/rs232/rs232.h" class hpz80unk_state : public driver_device { public: hpz80unk_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) , m_maincpu(*this, "maincpu") , m_p_rom(*this, "rom") , m_uart(*this, "uart%u", 1) { } DECLARE_READ8_MEMBER(port00_r); DECLARE_READ8_MEMBER(port02_r); DECLARE_READ8_MEMBER(port03_r); DECLARE_READ8_MEMBER(port0d_r); DECLARE_READ8_MEMBER(portfc_r); void hpz80unk(machine_config &config); void hpz80unk_io(address_map &map); void hpz80unk_mem(address_map &map); private: uint8_t m_port02_data; virtual void machine_reset() override; required_device m_maincpu; required_shared_ptr m_p_rom; required_device_array m_uart; }; READ8_MEMBER( hpz80unk_state::port00_r ) { return (m_uart[0]->dav_r() << 1) | (m_uart[0]->tbmt_r()) | 0xfc; } READ8_MEMBER( hpz80unk_state::port02_r ) { m_port02_data ^= 1; return m_port02_data; } READ8_MEMBER( hpz80unk_state::port03_r ) { return (m_uart[1]->dav_r() << 1) | (m_uart[1]->tbmt_r()) | 0xfc; } READ8_MEMBER( hpz80unk_state::port0d_r ) { return (m_uart[2]->dav_r() << 1) | (m_uart[2]->tbmt_r()) | 0xfc; } READ8_MEMBER( hpz80unk_state::portfc_r ) { return 0xfe; // or it halts } ADDRESS_MAP_START(hpz80unk_state::hpz80unk_mem) ADDRESS_MAP_UNMAP_HIGH AM_RANGE(0x0000, 0xbfff) AM_RAM AM_RANGE(0xc000, 0xffff) AM_ROM AM_SHARE("rom") ADDRESS_MAP_END ADDRESS_MAP_START(hpz80unk_state::hpz80unk_io) ADDRESS_MAP_UNMAP_HIGH ADDRESS_MAP_GLOBAL_MASK(0xff) AM_RANGE(0x00, 0x00) AM_READ(port00_r) // uart1 status AM_RANGE(0x01, 0x01) AM_DEVREADWRITE("uart1", ay31015_device, receive, transmit) // uart1 data AM_RANGE(0x02, 0x02) AM_READ(port02_r) AM_RANGE(0x03, 0x03) AM_READ(port03_r) // uart2 status AM_RANGE(0x04, 0x04) AM_DEVREADWRITE("uart2", ay31015_device, receive, transmit) // uart2 data AM_RANGE(0x0d, 0x0d) AM_READ(port0d_r) // uart3 status AM_RANGE(0x0e, 0x0e) AM_DEVWRITE("uart3", ay31015_device, transmit) // uart3 data AM_RANGE(0x1d, 0x1e) // top of memory is written here, big-endian AM_RANGE(0x1f, 0x1f) AM_READ_PORT("DSW") // select which uarts to use AM_RANGE(0xfc, 0xfc) AM_READ(portfc_r) ADDRESS_MAP_END /* Input ports */ static INPUT_PORTS_START( hpz80unk ) // this is a theoretical switch PORT_START("DSW") PORT_DIPNAME( 0x03, 0x00, "UART selection") PORT_DIPSETTING( 0x00, "In UART1, Out UART1") PORT_DIPSETTING( 0x01, "In UART1, Out UART2") PORT_DIPSETTING( 0x02, "In UART1, Out UART3") PORT_DIPSETTING( 0x03, "In UART2, Out UART1") INPUT_PORTS_END void hpz80unk_state::machine_reset() { uint8_t* user1 = memregion("user1")->base(); memcpy((uint8_t*)m_p_rom, user1, 0x4000); m_maincpu->set_pc(0xc000); // no idea if these are hard-coded, or programmable for (auto &uart : m_uart) { uart->write_xr(0); uart->write_xr(1); uart->write_swe(0); uart->write_np(1); uart->write_tsb(0); uart->write_nb1(1); uart->write_nb2(1); uart->write_eps(1); uart->write_cs(1); uart->write_cs(0); } // this should be rom/ram banking } MACHINE_CONFIG_START(hpz80unk_state::hpz80unk) /* basic machine hardware */ MCFG_CPU_ADD("maincpu",Z80, XTAL(4'000'000)) MCFG_CPU_PROGRAM_MAP(hpz80unk_mem) MCFG_CPU_IO_MAP(hpz80unk_io) /* video hardware */ MCFG_DEVICE_ADD("uart1", AY51013, 0) // COM2502 MCFG_AY51013_TX_CLOCK(153600) MCFG_AY51013_RX_CLOCK(153600) MCFG_AY51013_READ_SI_CB(DEVREADLINE("rs232a", rs232_port_device, rxd_r)) MCFG_AY51013_WRITE_SO_CB(DEVWRITELINE("rs232a", rs232_port_device, write_txd)) MCFG_AY51013_AUTO_RDAV(true) MCFG_RS232_PORT_ADD("rs232a", default_rs232_devices, "terminal") MCFG_DEVICE_ADD("uart2", AY51013, 0) // COM2502 MCFG_AY51013_TX_CLOCK(153600) MCFG_AY51013_RX_CLOCK(153600) MCFG_AY51013_READ_SI_CB(DEVREADLINE("rs232b", rs232_port_device, rxd_r)) MCFG_AY51013_WRITE_SO_CB(DEVWRITELINE("rs232b", rs232_port_device, write_txd)) MCFG_AY51013_AUTO_RDAV(true) MCFG_RS232_PORT_ADD("rs232b", default_rs232_devices, nullptr) MCFG_DEVICE_ADD("uart3", AY51013, 0) // COM2502 MCFG_AY51013_TX_CLOCK(153600) MCFG_AY51013_RX_CLOCK(153600) MCFG_AY51013_READ_SI_CB(DEVREADLINE("rs232c", rs232_port_device, rxd_r)) MCFG_AY51013_WRITE_SO_CB(DEVWRITELINE("rs232c", rs232_port_device, write_txd)) MCFG_AY51013_AUTO_RDAV(true) MCFG_RS232_PORT_ADD("rs232c", default_rs232_devices, nullptr) MACHINE_CONFIG_END /* ROM definition */ ROM_START( hpz80unk ) ROM_REGION( 0x8000, "user1", 0 ) // 1st bank ROM_LOAD( "u1", 0x0000, 0x0800, CRC(080cd04a) SHA1(42004af65d44e3507a4e0f343c5bf385b6377c40) ) ROM_LOAD( "u3", 0x0800, 0x0800, CRC(694075e1) SHA1(3db62645ade6a7f454b2d505aecc1661284c8ce2) ) ROM_LOAD( "u5", 0x1000, 0x0800, CRC(5573bd05) SHA1(68c8f02b3fe9d77ecb83df407ca78430e118004a) ) ROM_LOAD( "u7", 0x1800, 0x0800, CRC(d18a304a) SHA1(69dd0486bb6e4c2a22ab9da863bfb962016a321b) ) ROM_LOAD( "u9", 0x2000, 0x0800, CRC(f7a8665c) SHA1(e39d0ba4ce2dc773622d411a25f40a6a24b45449) ) ROM_LOAD( "u11", 0x2800, 0x0800, CRC(6c1ac77a) SHA1(50ca04ff0a11bd1c7d96f4731cef50978266ecca) ) ROM_LOAD( "u13", 0x3000, 0x0800, CRC(8b166911) SHA1(4301dcd6840d37ccfa5bff998a0d88bebe99dc31) ) ROM_LOAD( "u15", 0x3800, 0x0800, CRC(c6300499) SHA1(1b62d2a85c8f0b6a817e4be73ee34e0d90515c00) ) // 2nd bank ROM_LOAD( "u2", 0x4000, 0x0800, CRC(080cd04a) SHA1(42004af65d44e3507a4e0f343c5bf385b6377c40) ) ROM_LOAD( "u4", 0x4800, 0x0800, CRC(66c3745c) SHA1(d79fe764312a222ac64d325bf5f4abc7ca401d0f) ) ROM_LOAD( "u6", 0x5000, 0x0800, CRC(80761b4c) SHA1(5f6a12fbba533308b9fe7067c67a836be436a6f0) ) ROM_LOAD( "u8", 0x5800, 0x0800, CRC(64a2be18) SHA1(b11c08fdc9dc126038559462493f458ecdc78532) ) ROM_LOAD( "u10", 0x6000, 0x0800, CRC(40244d09) SHA1(106f8f978de36df9f3ebbe1e2c959b60e53273a2) ) ROM_LOAD( "u12", 0x6800, 0x0800, CRC(6eb01765) SHA1(66f9036a9f86cf3a79493330bbc06fb6932ab771) ) ROM_LOAD( "u14", 0x7000, 0x0800, CRC(3410e682) SHA1(30d94c0c0b6478dab202a603edaccca943008e35) ) ROM_LOAD( "u16", 0x7800, 0x0800, CRC(c03fdcab) SHA1(1081d787085add489c6e2a1d450e1a5790d18885) ) ROM_END /* Driver */ // YEAR NAME PARENT COMPAT MACHINE INPUT STATE INIT COMPANY FULLNAME FLAGS COMP( 1977, hpz80unk, 0, 0, hpz80unk, hpz80unk, hpz80unk_state, 0, "Hewlett-Packard", "unknown Z80-based mainframe", MACHINE_NOT_WORKING | MACHINE_NO_SOUND_HW )