// license:GPL-2.0+ // copyright-holders:Raphael Nabet /* Experimental exelvision driver Raphael Nabet, 2004 Exelvision was a French company that designed and sold two computers: * EXL 100 (1984) * EXELTEL (1986), which is mostly compatible with EXL 100, but has an integrated V23b modem and 5 built-in programs. Two custom variants of the EXELTEL were designed for chemist's shops and car dealers: they were bundled with application-specific business software, bar code reader, etc. These computer were mostly sold in France and in Europe (Spain); there was an Arabic version, too. Exelvision was founded by former TI employees, which is why their designs use TI components and have architectural reminiscences of the primitive TI-99/4 design (both computers are built around a microcontroller, have little CPU RAM and must therefore store program data in VRAM, and feature I/R keyboard and joysticks) Specs: * main CPU is a variant of tms7020 (exl100) or tms7040 (exeltel). AFAIK, the only difference compared to a stock tms7020/7040 is the SWAP register instruction is replaced by a custom microcoded LVDP instruction that reads a byte from the VDP VRAM read port; it seems that the first 6 bytes of internal ROM (0xF000-0xF005 on an exeltel) are missing, too. * in addition to the internal 128-byte RAM and 2kb (exl100) or 4kb (exeltel) ROM, there are 2kb of CPU RAM and 64(?)kb (exeltel only?) of CPU ROM. * I/O is controlled by a tms7041 (exl100) or tms7042 (exeltel) or a variant thereof. Communication with the main CPU is done through some custom interface (I think), details are still to be worked out. * video: tms3556 VDP with 32kb of VRAM (expandable to 64kb), attached to the main CPU. * sound: tms5220 speech synthesizer with speech ROM, attached to the I/O CPU * keyboard and joystick: an I/R interface controlled by the I/O CPU enables to use a keyboard and two joysticks * mass storage: tape interface controlled by the main CPU STATUS: * EXL 100 cannot be emulated because the ROMs are not dumped * EXELTEL stops early in the boot process and displays a red error screen, presumably because the I/O processor is not emulated TODO: * dump exeltel tms7042 I/O CPU ROM * everything */ #include "emu.h" #include "cpu/tms7000/tms7000.h" //#include "imagedev/cassette.h" #include "machine/spchrom.h" #include "machine/timer.h" #include "sound/tms5220.h" #include "video/tms3556.h" #include "bus/generic/slot.h" #include "bus/generic/carts.h" #include "emupal.h" #include "screen.h" #include "softlist.h" #include "speaker.h" #define VERBOSE 0 #include "logmacro.h" class exelv_state : public driver_device { public: exelv_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag), m_maincpu(*this, "maincpu"), m_tms3556(*this, "tms3556"), m_tms5220c(*this, "tms5220c"), m_cart(*this, "cartslot") { } void exeltel(machine_config &config); void exl100(machine_config &config); private: required_device m_maincpu; required_device m_tms3556; required_device m_tms5220c; optional_device m_cart; uint8_t mailbox_wx319_r(); void mailbox_wx318_w(uint8_t data); uint8_t tms7020_porta_r(); void tms7020_portb_w(uint8_t data); uint8_t tms7041_porta_r(); void tms7041_portb_w(uint8_t data); uint8_t tms7041_portc_r(); void tms7041_portc_w(uint8_t data); uint8_t tms7041_portd_r(); void tms7041_portd_w(uint8_t data); uint8_t rom_r(offs_t offset); DECLARE_MACHINE_START(exl100); DECLARE_MACHINE_START(exeltel); /* tms7020 i/o ports */ uint8_t m_tms7020_portb; /* tms7041 i/o ports */ uint8_t m_tms7041_portb; uint8_t m_tms7041_portc; uint8_t m_tms7041_portd; /* mailbox data */ uint8_t m_wx318; /* data of 74ls374 labeled wx318 */ uint8_t m_wx319; /* data of 74sl374 labeled wx319 */ TIMER_DEVICE_CALLBACK_MEMBER(exelv_hblank_interrupt); DECLARE_DEVICE_IMAGE_LOAD_MEMBER( exelvision_cartridge ); void tms7020_mem(address_map &map); void tms7040_mem(address_map &map); }; TIMER_DEVICE_CALLBACK_MEMBER(exelv_state::exelv_hblank_interrupt) { m_tms3556->interrupt(); } /* I/O CPU protocol (WIP): I do not have a dump of the I/O CPU ROMs. The I/O CPU CRC command should enable to dump them, but don't take my word for it. * port B bit >01 is asserted on reset and after a byte is sent to the I/O CPU. * port B bit >02 is asserted after a byte is read from the I/O CPU. When the I/O CPU sees this line asserted, it asserts port A bit >01. * port A bit >01 is asserted after a byte is sent to CPU (condition cleared when port B bit >01 is cleared after being asserted) and when port B bit >02 is asserted. * I/O CPU pulses the main CPU INT1 line when ready to send data; data can be read by the main CPU on the mailbox port (P48). The data is a function code optionally followed by several bytes of data. Function codes are: >00: unused >01: joystick 0 receive >02: joystick 1 receive >03: speech buffer start >04: speech buffer end >05: serial >06: unused >07: introduction screen (logo) (EXL 100 only?) or character definitions data byte #1: data length - 1 MSB data byte #2: data length - 1 LSB data bytes #3 through (data length + 3): graphic data >08: I/O cpu initialized >09: I/O cpu serial interface ready >0a: I/O cpu serial interface not ready >0b: screen switched off >0c: speech buffer start (EXELTEL only?) >0d: speech ROM or I/O cpu CRC check (EXELTEL only?) data byte #1: expected CRC MSB data byte #2: expected CRC LSB data byte #3: data length - 1 MSB data byte #4: data length - 1 LSB data bytes #5 through (data length + 5): data on which effective CRC is computed >0e: mailbox test, country code read (EXELTEL only?) >0f: speech ROM read (data repeat) (EXELTEL only?) * The main CPU sends data to the I/O CPU through the mailbox port (P48). The data byte is a function code; some function codes ask for extra data bytes, which are sent through the mailbox port as well. Function codes are: >00: I/O CPU reset >01: NOP (EXELTEL only?) >02: read joystick 0 current value >03: read joystick 1 current value >04: test serial interface availability >05: transmit a byte to serial interface >06: initialization of serial interface >07: read contents of speech ROM (EXELTEL only?) >08: reset speech synthesizer >09: start speech synthesizer >0a: synthesizer data >0b: standard generator request >0c: I/O CPU CRC (EXELTEL only?) >0d: send exelvision logo (EXL 100 only), start speech ROM sound (EXELTEL only?) >0e: data for speech on ROM (EXELTEL only?) >0f: do not decode joystick 0 keys (EXELTEL only?) >10: do not decode joystick 1 keys (EXELTEL only?) >11: decode joystick 0 keys (EXELTEL only?) >12: decode joystick 1 keys (EXELTEL only?) >13: mailbox test: echo sent data (EXELTEL only?) >14: enter sleep mode (EXELTEL only?) >15: read country code in speech ROM (EXELTEL only?) >16: position I/O CPU DSR without initialization (EXELTEL only?) >17: handle speech ROM sound with address (EXELTEL only?) other values: I/O CPU reset? */ uint8_t exelv_state::mailbox_wx319_r() { LOG("[TMS7220] reading mailbox %d\n", m_wx319); return m_wx319; } void exelv_state::mailbox_wx318_w(uint8_t data) { LOG("wx318 write 0x%02x\n", data); m_wx318 = data; } /* TMS7020 PORT A A0 - R - TMS7041 port B bit 7 (REV3) A1 - A2 - A3 - A4 - A5 - A6 - A7 - */ uint8_t exelv_state::tms7020_porta_r() { LOG("tms7020_porta_r\n"); return ( m_tms7041_portb & 0x80 ) ? 0x01 : 0x00; } /* TMS7020 PORT B B0 - W - TMS7041 port A bit 2 (REV2) B1 - W - TMS7041 port A bit 4 (REV4) B2 - B3 - B4 - B5 - B6 - B7 - */ void exelv_state::tms7020_portb_w(uint8_t data) { LOG("tms7020_portb_w: data = 0x%02x\n", data); m_tms7020_portb = data; } /* TMS7041 PORT A A0 - X1 NDSR A8 A1 - X1 MDTR A9 A2 - R - TMS7020 port B bit 0 (REV2) A3 - TMS5220 IRQ A4 - R - TMS7020 port B bit 1 (REV4) A5 - X1 RXD A4 (version b) / WX301-14 (version a) A6 - X1 SCLK A9 A7 - TMS5220 RDY */ uint8_t exelv_state::tms7041_porta_r() { uint8_t data = 0x00; static uint8_t data_last=0; // TMS5220 OK data |= m_tms5220c->intq_r() ? 0x08 : 0x00; // A3 data |= m_tms5220c->readyq_r() ? 0x80 : 0x00; // A7 // TMS7220 data |= (m_tms7020_portb & 0x01 ) ? 0x04 : 0x00; // A2 data |= (m_tms7020_portb & 0x02) ? 0x10 : 0x00; // A4 // SERIAL PORT if (data!=data_last) { LOG("tms7041_porta_r %x\n",data); } data_last=data; return data; } /* TMS7041 PORT B B0 - W - TMS5220 W B1 - W - TMS5220 R B2 - W - TMS7020 pin 13 / IRQ1 B3 - X1 TXD A5 (version b) / WX301-8 (version a) B4 - TP3 B5 - REV5 WX318-1 B6 - W - REV6 WX319-11 B7 - W - TMS7020 port A bit 0 (REV3) */ void exelv_state::tms7041_portb_w(uint8_t data) { LOG("tms7041_portb_w: data = 0x%02x\n", data); m_tms5220c->wsq_w((data & 0x01) ? 1 : 0); m_tms5220c->rsq_w((data & 0x02) ? 1 : 0); LOG("TMS7020 %s int1\n",((data & 0x04) ? "clear" : "assert")); m_maincpu->set_input_line(TMS7000_INT1_LINE, (data & 0x04) ? CLEAR_LINE : ASSERT_LINE); /* Check for low->high transition on B6 */ if (!(m_tms7041_portb & 0x40) && (data & 0x40)) { LOG("wx319 write 0x%02x\n", m_tms7041_portc); m_wx319 = m_tms7041_portc; } m_tms7041_portb = data; } /* TMS7041 PORT C - connected to mailbox WX318 and WX319 data bits */ uint8_t exelv_state::tms7041_portc_r() { uint8_t data = 0xff; LOG("tms7041_portc_r\n"); /* Check if wx318 output is enabled */ if (!(m_tms7041_portb & 0x20)) data = m_wx318; return data; } void exelv_state::tms7041_portc_w(uint8_t data) { LOG("tms7041_portc_w: data = 0x%02x\n", data); m_tms7041_portc = data; } /* TMS7041 PORT D D0 - TMS5220 D7 D1 - TMS5220 D6 D2 - TMS5220 D5 D3 - TMS5220 D4 D4 - TMS5220 D3 D5 - TMS5220 D2 D6 - TMS5220 D1 D7 - TMS5220 D0 */ uint8_t exelv_state::tms7041_portd_r() { uint8_t data = m_tms5220c->status_r(); LOG("tms7041_portd_r: data = 0x%02x\n", data); return data; } void exelv_state::tms7041_portd_w(uint8_t data) { LOG("tms7041_portd_w: data = 0x%02x\n", data); m_tms5220c->data_w(data); m_tms7041_portd = data; } /* CARTRIDGE ACCESS */ uint8_t exelv_state::rom_r(offs_t offset) { if (m_cart && m_cart->exists()) return m_cart->read_rom(offset + 0x200); return 0; } /* Main CPU memory map summary: @>0000-@>007f: tms7020/tms7040 internal RAM @>0080-@>00ff: reserved @>0100-@>010b: tms7020/tms7040 internal I/O ports @>104 (P4): port A @>106 (P6): port B bit >04: page select bit 0 (LSBit) @>010c-@>01ff: external I/O ports? @>012d (P45): tms3556 control write port??? @>012e (P46): tms3556 VRAM write port??? @>0130 (P48): I/O CPU communication port R/W ("mailbox") @>0138 (P56): read sets page select bit 1, write clears it??? @>0139 (P57): read sets page select bit 2 (MSBit), write clears it??? @>0140 (P64) bit >40: enable page select bit 1 and 2 (MSBits) @>0200-@>7fff: system ROM? (two pages?) + cartridge ROMs? (one or two pages?) @>8000-@>bfff: free for expansion? @>c000-@>c7ff: CPU RAM? @>c800-@>efff: free for expansion? @>f000-@>f7ff: tms7040 internal ROM @>f800-@>ffff: tms7020/tms7040 internal ROM */ void exelv_state::tms7020_mem(address_map &map) { map(0x0080, 0x00ff).noprw(); map(0x0124, 0x0124).r(m_tms3556, FUNC(tms3556_device::vram_r)); map(0x0125, 0x0125).r(m_tms3556, FUNC(tms3556_device::reg_r)); map(0x0128, 0x0128).r(m_tms3556, FUNC(tms3556_device::initptr_r)); map(0x012d, 0x012d).nopr().w(m_tms3556, FUNC(tms3556_device::reg_w)); map(0x012e, 0x012e).nopr().w(m_tms3556, FUNC(tms3556_device::vram_w)); map(0x0130, 0x0130).rw(FUNC(exelv_state::mailbox_wx319_r), FUNC(exelv_state::mailbox_wx318_w)); map(0x0200, 0x7fff).r(FUNC(exelv_state::rom_r)); map(0x8000, 0xbfff).noprw(); map(0xc000, 0xc7ff).ram(); /* CPU RAM */ map(0xc800, 0xf7ff).noprw(); } void exelv_state::tms7040_mem(address_map &map) { map(0x0080, 0x00ff).noprw(); map(0x0124, 0x0124).r(m_tms3556, FUNC(tms3556_device::vram_r)); map(0x0125, 0x0125).r(m_tms3556, FUNC(tms3556_device::reg_r)); map(0x0128, 0x0128).r(m_tms3556, FUNC(tms3556_device::initptr_r)); map(0x012d, 0x012d).nopr().w(m_tms3556, FUNC(tms3556_device::reg_w)); map(0x012e, 0x012e).nopr().w(m_tms3556, FUNC(tms3556_device::vram_w)); map(0x0130, 0x0130).rw(FUNC(exelv_state::mailbox_wx319_r), FUNC(exelv_state::mailbox_wx318_w)); map(0x0200, 0x7fff).bankr("bank1"); /* system ROM */ map(0x8000, 0xbfff).noprw(); map(0xc000, 0xc7ff).ram(); /* CPU RAM */ map(0xc800, 0xefff).noprw(); } /* keyboard: ??? */ static INPUT_PORTS_START(exelv) PORT_START("exelv") INPUT_PORTS_END /* Machine Initialization */ MACHINE_START_MEMBER( exelv_state, exl100) { /* register for state saving */ save_item(NAME(m_tms7020_portb)); save_item(NAME(m_tms7041_portb)); save_item(NAME(m_tms7041_portc)); save_item(NAME(m_tms7041_portd)); save_item(NAME(m_wx318)); save_item(NAME(m_wx319)); } MACHINE_START_MEMBER( exelv_state, exeltel) { uint8_t *rom = memregion("user1")->base() + 0x0200; membank("bank1")->configure_entry(0, rom); membank("bank1")->set_entry(0); /* register for state saving */ save_item(NAME(m_tms7020_portb)); save_item(NAME(m_tms7041_portb)); save_item(NAME(m_tms7041_portc)); save_item(NAME(m_tms7041_portd)); save_item(NAME(m_wx318)); save_item(NAME(m_wx319)); } void exelv_state::exl100(machine_config &config) { /* basic machine hardware */ TMS7020_EXL(config, m_maincpu, 4.9152_MHz_XTAL); m_maincpu->set_addrmap(AS_PROGRAM, &exelv_state::tms7020_mem); m_maincpu->in_porta().set(FUNC(exelv_state::tms7020_porta_r)); m_maincpu->out_portb().set(FUNC(exelv_state::tms7020_portb_w)); TIMER(config, "scantimer").configure_scanline(FUNC(exelv_state::exelv_hblank_interrupt), "screen", 0, 1); MCFG_MACHINE_START_OVERRIDE(exelv_state, exl100) tms7041_device &subcpu(TMS7041(config, "tms7041", 4.9152_MHz_XTAL)); subcpu.in_porta().set(FUNC(exelv_state::tms7041_porta_r)); subcpu.out_portb().set(FUNC(exelv_state::tms7041_portb_w)); subcpu.in_portc().set(FUNC(exelv_state::tms7041_portc_r)); subcpu.out_portc().set(FUNC(exelv_state::tms7041_portc_w)); subcpu.in_portd().set(FUNC(exelv_state::tms7041_portd_r)); subcpu.out_portd().set(FUNC(exelv_state::tms7041_portd_w)); config.set_perfect_quantum(m_maincpu); TMS3556(config, m_tms3556, 18_MHz_XTAL); /* video hardware */ screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER)); screen.set_video_attributes(VIDEO_UPDATE_BEFORE_VBLANK); screen.set_screen_update("tms3556", FUNC(tms3556_device::screen_update)); #if TMS3556_DOUBLE_WIDTH screen.set_size(tms3556_device::TOTAL_WIDTH*2, tms3556_device::TOTAL_HEIGHT*2); screen.set_visarea(0, tms3556_device::TOTAL_WIDTH*2-1, 0, tms3556_device::TOTAL_HEIGHT*2-1); #else screen.set_size(tms3556_device::TOTAL_WIDTH, tms3556_device::TOTAL_HEIGHT*2); screen.set_visarea(0, tms3556_device::TOTAL_WIDTH-1, 0, tms3556_device::TOTAL_HEIGHT-1); #endif screen.set_refresh_hz(50); screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500)); /* not accurate */ screen.set_palette("palette"); PALETTE(config, "palette", palette_device::RGB_3BIT); //SPEECHROM(config, "vsm", 0); /* sound */ SPEAKER(config, "mono").front_center(); TMS5220C(config, m_tms5220c, 640000); // m_tms5220c->set_speechrom_tag("vsm"); m_tms5220c->add_route(ALL_OUTPUTS, "mono", 1.00); /* cartridge */ GENERIC_CARTSLOT(config, "cartslot", generic_linear_slot, "exelvision_cart", "bin,rom"); SOFTWARE_LIST(config, "cart_list").set_original("exl100"); } void exelv_state::exeltel(machine_config &config) { /* basic machine hardware */ TMS7040(config, m_maincpu, 9.8304_MHz_XTAL); m_maincpu->set_divide_by_4(); m_maincpu->set_addrmap(AS_PROGRAM, &exelv_state::tms7040_mem); m_maincpu->in_porta().set(FUNC(exelv_state::tms7020_porta_r)); m_maincpu->out_portb().set(FUNC(exelv_state::tms7020_portb_w)); TIMER(config, "scantimer").configure_scanline(FUNC(exelv_state::exelv_hblank_interrupt), "screen", 0, 1); MCFG_MACHINE_START_OVERRIDE(exelv_state, exeltel) tms7042_device &subcpu(TMS7042(config, "tms7042", 9.8304_MHz_XTAL)); subcpu.set_divide_by_4(); subcpu.in_porta().set(FUNC(exelv_state::tms7041_porta_r)); subcpu.out_portb().set(FUNC(exelv_state::tms7041_portb_w)); subcpu.in_portc().set(FUNC(exelv_state::tms7041_portc_r)); subcpu.out_portc().set(FUNC(exelv_state::tms7041_portc_w)); subcpu.in_portd().set(FUNC(exelv_state::tms7041_portd_r)); subcpu.out_portd().set(FUNC(exelv_state::tms7041_portd_w)); config.set_perfect_quantum(m_maincpu); TMS3556(config, m_tms3556, 18_MHz_XTAL); /* video hardware */ screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER)); screen.set_video_attributes(VIDEO_UPDATE_BEFORE_VBLANK); screen.set_screen_update("tms3556", FUNC(tms3556_device::screen_update)); #if TMS3556_DOUBLE_WIDTH screen.set_size(tms3556_device::TOTAL_WIDTH*2, tms3556_device::TOTAL_HEIGHT*2); screen.set_visarea(0, tms3556_device::TOTAL_WIDTH*2-1, 0, tms3556_device::TOTAL_HEIGHT*2-1); #else screen.set_size(tms3556_device::TOTAL_WIDTH, tms3556_device::TOTAL_HEIGHT*2); screen.set_visarea(0, tms3556_device::TOTAL_WIDTH-1, 0, tms3556_device::TOTAL_HEIGHT-1); #endif screen.set_refresh_hz(50); screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500)); /* not accurate */ screen.set_palette("palette"); PALETTE(config, "palette", palette_device::RGB_3BIT); SPEECHROM(config, "vsm", 0); /* sound */ SPEAKER(config, "mono").front_center(); TMS5220C(config, m_tms5220c, 9.8304_MHz_XTAL / 15); // unknown divider for "VSPCLK" (generated by TAHC06 gate array) m_tms5220c->set_speechrom_tag("vsm"); m_tms5220c->add_route(ALL_OUTPUTS, "mono", 1.00); } /* ROM loading */ ROM_START(exl100) ROM_REGION(0x800, "maincpu", 0) ROM_LOAD("exl100in.bin", 0x000, 0x800, CRC(049109a3) SHA1(98a07297dcdacef41c793c197b6496dac1e8e744)) /* TMS7020 ROM, correct */ ROM_REGION(0x1000, "tms7041", 0) ROM_LOAD("exl100_7041.bin", 0x0000, 0x1000, CRC(38f6fc7a) SHA1(b71d545664a974d8ad39bdf600c5b9884c3efab6)) /* TMS7041 internal ROM, correct */ // ROM_REGION(0x8000, "vsm", 0) ROM_END ROM_START(exeltel) ROM_REGION(0x1000, "maincpu", 0) ROM_LOAD("exeltel_7040.bin", 0x0000, 0x1000, CRC(2792f02f) SHA1(442a852eb68ef78974733d169084752a131de23d)) /* TMS7040 internal ROM */ ROM_REGION(0x1000, "tms7042", 0) ROM_LOAD("exeltel_7042.bin", 0x0000, 0x1000, BAD_DUMP CRC(a0163507) SHA1(8452849df7eac8a89cf03ee98e2306047c1c4c38)) /* TMS7042 internal ROM, needs redump */ ROM_REGION(0x10000,"user1",0) ROM_SYSTEM_BIOS( 0, "french", "French v1.4" ) ROMX_LOAD("exeltel14.bin", 0x0000, 0x10000, CRC(52a80dd4) SHA1(2cb4c784fba3aec52770999bb99a9a303269bf89), ROM_BIOS(0)) /* French system ROM v1.4 */ ROM_SYSTEM_BIOS( 1, "spanish", "Spanish" ) ROMX_LOAD("amper.bin", 0x0000, 0x10000, CRC(45af256c) SHA1(3bff16542f8ac55b9841084ea38034132459facb), ROM_BIOS(1)) /* Spanish system rom */ ROM_REGION(0x8000, "vsm", 0) ROM_LOAD("cm62312.bin", 0x0000, 0x4000, CRC(93b817de) SHA1(03863087a071b8f22d36a52d18243f1c33e17ff7)) /* system speech ROM */ ROM_END // YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS COMP(1984, exl100, 0, 0, exl100, exelv, exelv_state, empty_init, "Exelvision", "EXL 100", MACHINE_NOT_WORKING) COMP(1986, exeltel, exl100, 0, exeltel, exelv, exelv_state, empty_init, "Exelvision", "Exeltel", MACHINE_NOT_WORKING)