diff options
author | cracyc <cracyc@users.noreply.github.com> | 2016-06-11 22:38:01 -0500 |
---|---|---|
committer | cracyc <cracyc@users.noreply.github.com> | 2016-06-11 22:38:01 -0500 |
commit | d1574082185c137a1214885c73b9d34af6d3f293 (patch) | |
tree | 854944d1afe384b3073d165ab573a58409d4ba9f /src/mame | |
parent | 4d2fc96aa1746c88b2e93bfdc43689f94ccb7e39 (diff) |
vt240: WIP (nw)
Diffstat (limited to 'src/mame')
-rw-r--r-- | src/mame/drivers/vt240.cpp | 198 |
1 files changed, 151 insertions, 47 deletions
diff --git a/src/mame/drivers/vt240.cpp b/src/mame/drivers/vt240.cpp index 51a8e280393..ad42cd94d0b 100644 --- a/src/mame/drivers/vt240.cpp +++ b/src/mame/drivers/vt240.cpp @@ -30,7 +30,7 @@ #include "machine/i8251.h" #include "machine/mc68681.h" #include "machine/ms7004.h" -#include "machine/ram.h" +#include "machine/bankdev.h" #include "video/upd7220.h" #define VERBOSE_DBG 1 /* general debug messages */ @@ -50,31 +50,48 @@ public: vt240_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag), m_maincpu(*this, "maincpu"), + m_i8085(*this, "charcpu"), m_i8251(*this, "i8251"), m_duart(*this, "duart"), m_hgdc(*this, "upd7220"), - m_video_ram(*this, "video_ram"){ } + m_bank(*this, "bank"), + m_video_ram(*this, "video_ram"), + m_rom(*this, "maincpu"){ } required_device<cpu_device> m_maincpu; - + required_device<cpu_device> m_i8085; required_device<i8251_device> m_i8251; - DECLARE_WRITE_LINE_MEMBER(write_keyboard_clock); - required_device<mc68681_device> m_duart; - required_device<upd7220_device> m_hgdc; + required_device<address_map_bank_device> m_bank; + required_shared_ptr<UINT16> m_video_ram; + required_region_ptr<UINT16> m_rom; + + DECLARE_WRITE_LINE_MEMBER(write_keyboard_clock); + DECLARE_WRITE_LINE_MEMBER(i8085_rdy_w); DECLARE_READ8_MEMBER( test_r ); + DECLARE_READ8_MEMBER(i8085_comm_r); + DECLARE_WRITE8_MEMBER(i8085_comm_w); + DECLARE_READ8_MEMBER(t11_comm_r); + DECLARE_WRITE8_MEMBER(t11_comm_w); + DECLARE_READ8_MEMBER(mem_map_cs_r); + DECLARE_WRITE8_MEMBER(mem_map_cs_w); + DECLARE_READ8_MEMBER(ctrl_r); + DECLARE_WRITE8_MEMBER(mem_map_sel_w); + DECLARE_READ16_MEMBER(mem_r); + DECLARE_WRITE16_MEMBER(mem_w); //UINT16 m_pcg_addr; //UINT8 m_pcg_internal_addr; //UINT8 *m_char_rom; - required_shared_ptr<UINT16> m_video_ram; - DECLARE_DRIVER_INIT(vt240); virtual void machine_reset() override; - INTERRUPT_GEN_MEMBER(vt240_irq); UPD7220_DRAW_TEXT_LINE_MEMBER( hgdc_draw_text ); + + UINT8 m_i8085_out, m_t11_out; + UINT8 m_mem_map[16]; + UINT8 m_mem_map_sel; }; WRITE_LINE_MEMBER(vt240_state::write_keyboard_clock) @@ -83,6 +100,11 @@ WRITE_LINE_MEMBER(vt240_state::write_keyboard_clock) m_i8251->write_rxc(state); } +WRITE_LINE_MEMBER(vt240_state::i8085_rdy_w) +{ + //m_maincpu->set_input_line(T11_IRQ1, state ? ASSERT_LINE : CLEAR_LINE); +} + /* TODO */ UPD7220_DRAW_TEXT_LINE_MEMBER( vt240_state::hgdc_draw_text ) { @@ -125,32 +147,105 @@ UPD7220_DRAW_TEXT_LINE_MEMBER( vt240_state::hgdc_draw_text ) } -/* presumably communication with T11 */ -READ8_MEMBER( vt240_state::test_r ) + +READ8_MEMBER(vt240_state::t11_comm_r) +{ + return m_t11_out; +} + +WRITE8_MEMBER(vt240_state::t11_comm_w) +{ + m_i8085_out = data; +} + +READ8_MEMBER(vt240_state::i8085_comm_r) +{ + switch(offset) + { + case 0: + m_i8085->set_input_line(I8085_RST65_LINE, CLEAR_LINE); + return m_i8085_out; + } + return 0xff; +} + +WRITE8_MEMBER(vt240_state::i8085_comm_w) +{ + switch(offset) + { + case 1: + m_t11_out = data; + m_i8085->set_input_line(I8085_RST65_LINE, ASSERT_LINE); + break; + case 2: + m_i8085->set_input_line(INPUT_LINE_RESET, PULSE_LINE); + break; + } +} +READ8_MEMBER(vt240_state::mem_map_cs_r) +{ + return ~m_mem_map[offset]; +} + +WRITE8_MEMBER(vt240_state::mem_map_cs_w) +{ + m_mem_map[offset] = ~data; +} + +READ8_MEMBER(vt240_state::ctrl_r) +{ + return m_mem_map_sel; +} + +WRITE8_MEMBER(vt240_state::mem_map_sel_w) { - //m_maincpu->set_input_line(I8085_RST65_LINE, CLEAR_LINE); + m_mem_map_sel = data & 1; +} - return rand(); +READ16_MEMBER(vt240_state::mem_r) +{ + if(m_mem_map_sel) + { + m_bank->set_bank(m_mem_map[(offset >> 11) & 0xf]); + return m_bank->read16(space, offset & 0x7ff, mem_mask); + } + else + return m_rom[offset]; } +WRITE16_MEMBER(vt240_state::mem_w) +{ + if(m_mem_map_sel) + { + m_bank->set_bank(m_mem_map[(offset >> 11) & 0xf]); + m_bank->write16(space, offset & 0x7ff, data, mem_mask); + } +} + +static ADDRESS_MAP_START(bank_map, AS_PROGRAM, 16, vt240_state) + ADDRESS_MAP_UNMAP_HIGH + AM_RANGE(0x00000, 0x0ffff) AM_ROM AM_REGION("maincpu", 0) + AM_RANGE(0x80000, 0x87fff) AM_RAM +ADDRESS_MAP_END // PDF page 78 (4-25) static ADDRESS_MAP_START( vt240_mem, AS_PROGRAM, 16, vt240_state ) ADDRESS_MAP_UNMAP_HIGH - AM_RANGE (0000000, 0077777) AM_ROM - // 0170xxx MEM MAP/8085 decoder + AM_RANGE (0000000, 0167777) AM_READWRITE(mem_r, mem_w) + AM_RANGE (0170000, 0170037) AM_READWRITE8(mem_map_cs_r, mem_map_cs_w, 0x00ff) + AM_RANGE (0170040, 0170041) AM_WRITE8(mem_map_sel_w, 0x00ff) + AM_RANGE (0170100, 0170101) AM_READ8(ctrl_r, 0x00ff) AM_RANGE (0171000, 0171003) AM_DEVREADWRITE8("i8251", i8251_device, data_r, data_w, 0x00ff) AM_RANGE (0171004, 0171007) AM_DEVREADWRITE8("i8251", i8251_device, status_r, control_w, 0x00ff) AM_RANGE (0172000, 0172077) AM_DEVREADWRITE8("duart", mc68681_device, read, write, 0xff) // 0173000 Video logic // 0174000 Video logic - // 017500x Video logic + AM_RANGE (0175000, 0175005) AM_READWRITE8(i8085_comm_r, i8085_comm_w, 0x00ff) // 0176xxx NVR // 017700x System comm logic ADDRESS_MAP_END // PDF page 134 (6-9) -#if 0 static ADDRESS_MAP_START(vt240_char_mem, AS_PROGRAM, 8, vt240_state) ADDRESS_MAP_UNMAP_HIGH AM_RANGE(0x0000, 0x3fff) AM_ROM AM_REGION("charcpu", 0) @@ -162,27 +257,19 @@ static ADDRESS_MAP_START(vt240_char_io, AS_IO, 8, vt240_state) ADDRESS_MAP_UNMAP_HIGH ADDRESS_MAP_GLOBAL_MASK(0xff) AM_RANGE(0x00, 0x01) AM_DEVREADWRITE("upd7220", upd7220_device, read, write) - AM_RANGE(0x20, 0x20) AM_READ(test_r) + AM_RANGE(0x20, 0x20) AM_READWRITE(t11_comm_r, t11_comm_w) //AM_RANGE(0x30, 0x30) AM_READWRITE(pcg_r,pcg_w) // 0x30 PCG ADDRESS_MAP_END -#endif static ADDRESS_MAP_START( upd7220_map, AS_0, 16, vt240_state) - AM_RANGE(0x00000, 0x3ffff) AM_RAM AM_SHARE("video_ram") + AM_RANGE(0x00000, 0x0ffff) AM_RAM AM_SHARE("video_ram") ADDRESS_MAP_END -/* Input ports */ -static INPUT_PORTS_START( vt240 ) -INPUT_PORTS_END - void vt240_state::machine_reset() { -} - -INTERRUPT_GEN_MEMBER(vt240_state::vt240_irq) -{ - //device.execute().set_input_line(I8085_RST65_LINE, ASSERT_LINE); + m_i8251->write_cts(0); + m_mem_map_sel = 0; } static const gfx_layout vt240_chars_8x10 = @@ -200,21 +287,25 @@ static GFXDECODE_START( vt240 ) GFXDECODE_ENTRY( "charcpu", 0x338*10-2, vt240_chars_8x10, 0, 8 ) GFXDECODE_END -static MACHINE_CONFIG_FRAGMENT( vt240_motherboard ) +static MACHINE_CONFIG_START( vt240, vt240_state ) MCFG_CPU_ADD("maincpu", T11, XTAL_7_3728MHz) // confirm MCFG_CPU_PROGRAM_MAP(vt240_mem) MCFG_T11_INITIAL_MODE(5 << 13) -/* - MCFG_CPU_ADD("charcpu", I8085A, XTAL_16MHz / 4) - MCFG_CPU_PROGRAM_MAP(vt240_char_mem) - MCFG_CPU_IO_MAP(vt240_char_io) - MCFG_CPU_VBLANK_INT_DRIVER("screen", vt240_state, vt240_irq) -*/ + MCFG_CPU_ADD("charcpu", I8085A, XTAL_16MHz / 4) + MCFG_CPU_PROGRAM_MAP(vt240_char_mem) + MCFG_CPU_IO_MAP(vt240_char_io) + MCFG_I8085A_SOD(WRITELINE(vt240_state, i8085_rdy_w)) + + MCFG_DEVICE_ADD("bank", ADDRESS_MAP_BANK, 0) + MCFG_DEVICE_PROGRAM_MAP(bank_map) + MCFG_ADDRESS_MAP_BANK_ENDIANNESS(ENDIANNESS_LITTLE) + MCFG_ADDRESS_MAP_BANK_ADDRBUS_WIDTH(20) + MCFG_ADDRESS_MAP_BANK_DATABUS_WIDTH(16) + MCFG_ADDRESS_MAP_BANK_STRIDE(0x1000) MCFG_SCREEN_ADD("screen", RASTER) MCFG_SCREEN_REFRESH_RATE(50) - MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */ MCFG_SCREEN_SIZE(640, 480) MCFG_SCREEN_VISIBLE_AREA(0, 640-1, 0, 480-1) // MCFG_VIDEO_START_OVERRIDE(vt240_state,vt240) @@ -235,22 +326,35 @@ static MACHINE_CONFIG_FRAGMENT( vt240_motherboard ) // MCFG_I8251_DTR_HANDLER(DEVWRITELINE("rs232", rs232_port_device, write_dtr)) // MCFG_I8251_RTS_HANDLER(DEVWRITELINE("rs232", rs232_port_device, write_rts)) + MCFG_DEVICE_ADD("i8251", I8251, 0) + MCFG_I8251_TXD_HANDLER(DEVWRITELINE("lk201", lk201_device, rx_w)) + //MCFG_I8251_DTR_HANDLER(WRITELINE(rainbow_state, irq_hi_w)) + //MCFG_I8251_RXRDY_HANDLER(INPUTLINE("maincpu", )) + //MCFG_I8251_TXRDY_HANDLER(WRITELINE(rainbow_state, kbd_txready_w)) + + MCFG_DEVICE_ADD("lk201", LK201, 0) + MCFG_LK201_TX_HANDLER(DEVWRITELINE("i8251", i8251_device, write_rxd)) + + MCFG_DEVICE_ADD("keyboard_clock", CLOCK, 4800 * 64) // 8251 is set to /64 on the clock input + MCFG_CLOCK_SIGNAL_HANDLER(WRITELINE(vt240_state, write_keyboard_clock)) + MCFG_RS232_PORT_ADD("rs232", default_rs232_devices, "null_modem") MCFG_RS232_RXD_HANDLER(DEVWRITELINE("duart", mc68681_device, rx_a_w)) // MCFG_RS232_DSR_HANDLER(DEVWRITELINE("duart", mc68681_device, ipX_w)) MACHINE_CONFIG_END -static MACHINE_CONFIG_START( mc7105, vt240_state ) - MCFG_FRAGMENT_ADD(vt240_motherboard) - - // serial connection to MS7004 keyboard - MCFG_DEVICE_ADD("i8251", I8251, 0) -// MCFG_I8251_RXRDY_HANDLER(DEVWRITELINE("pic8259", pic8259_device, ir1_w)) +static MACHINE_CONFIG_DERIVED( mc7105, vt240 ) + MCFG_DEVICE_REMOVE("lk201") MCFG_DEVICE_ADD("ms7004", MS7004, 0) MCFG_MS7004_TX_HANDLER(DEVWRITELINE("i8251", i8251_device, write_rxd)) + MCFG_DEVICE_MODIFY("i8251") + MCFG_I8251_TXD_HANDLER(NOOP) + //MCFG_I8251_TXD_HANDLER(DEVWRITELINE("ms7004", ms7004_device, rx_w)) + // baud rate is supposed to be 4800 but keyboard is slightly faster + MCFG_DEVICE_REMOVE("keyboard_clock") MCFG_DEVICE_ADD("keyboard_clock", CLOCK, 4960*16) MCFG_CLOCK_SIGNAL_HANDLER(WRITELINE(vt240_state, write_keyboard_clock)) MACHINE_CONFIG_END @@ -261,7 +365,7 @@ ROM_START( mc7105 ) ROM_LOAD( "027.bin", 0x8000, 0x8000, CRC(a159b412) SHA1(956097ccc2652d494258b3682498cfd3096d7d4f)) ROM_LOAD( "028.bin", 0x0000, 0x8000, CRC(b253151f) SHA1(22ffeef8eb5df3c38bfe91266f26d1e7822cdb53)) - ROM_REGION( 0x20000, "maincpu", ROMREGION_ERASEFF ) + ROM_REGION( 0x40000, "maincpu", ROMREGION_ERASEFF ) ROM_LOAD16_BYTE( "029.bin", 0x00000, 0x8000, CRC(4a6db217) SHA1(47637325609ea19ffab61fe31e2700d72fa50729)) ROM_LOAD16_BYTE( "031.bin", 0x00001, 0x8000, CRC(47129579) SHA1(39de9e2e26f90c5da5e72a09ff361c1a94b9008a)) ROM_LOAD16_BYTE( "030.bin", 0x10000, 0x8000, CRC(05fd7b75) SHA1(2ad8c14e76accfa1b9b8748c58e9ebbc28844a47)) @@ -273,7 +377,7 @@ ROM_START( vt240 ) ROM_REGION( 0x10000, "charcpu", ROMREGION_ERASEFF ) ROM_LOAD( "23-008e6-00.e100", 0x0000, 0x8000, CRC(ebc8a2fe) SHA1(70838175f8302fdc0dee79b2403fa95e6d989206)) - ROM_REGION( 0x20000, "maincpu", ROMREGION_ERASEFF ) + ROM_REGION( 0x40000, "maincpu", ROMREGION_ERASEFF ) ROM_DEFAULT_BIOS( "vt240" ) // according to the schematics an even older set exists, variation 'E1' with roms: // e100/8085: 23-003e6 @@ -323,7 +427,7 @@ DRIVER_INIT_MEMBER(vt240_state,vt240) } /* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */ -COMP( 1983, vt240, 0, 0, mc7105, vt240, vt240_state, vt240, "Digital Equipment Corporation", "VT240", MACHINE_NOT_WORKING | MACHINE_NO_SOUND) +COMP( 1983, vt240, 0, 0, vt240, 0, vt240_state, vt240, "Digital Equipment Corporation", "VT240", MACHINE_NOT_WORKING | MACHINE_NO_SOUND) //COMP( 1983, vt241, 0, 0, vt220, vt220, driver_device, 0, "Digital Equipment Corporation", "VT241", MACHINE_NOT_WORKING | MACHINE_NO_SOUND) // NOTE: the only difference between VT240 and VT241 is the latter comes with a VR241 Color monitor, while the former comes with a mono display; the ROMs and operation are identical. -COMP( 1983, mc7105, 0, 0, mc7105, vt240, vt240_state, vt240, "Elektronika", "MC7105", MACHINE_NOT_WORKING | MACHINE_NO_SOUND) +COMP( 1983, mc7105, 0, 0, mc7105, 0, vt240_state, vt240, "Elektronika", "MC7105", MACHINE_NOT_WORKING | MACHINE_NO_SOUND) |