// license:BSD-3-Clause // copyright-holders:Joakim Larsson Edstrom /* *__________________________________________________________________________________________________________ * The Didact Esselte 100 CPU board | *__________________________________________________________________________________________________________| * * ___________________________________________________________________________________________________________ _____________________________________________________ * | The Didact Mp68A CPU board, by Anders Andersson 1979 | |The Didact Mp68A keypad/display PB6 +oooo+ | * | +------+ +-------+ +--+ | | by Anders Andersson 1979 +-------+ |cass| | * | | 7402 | | 74490 | | | +-------+ +--+ | | +--+ | 9368 | +----+ +--+| * | +-------+ +------+ +-------+ | | | | | | | |+-------+ 2x5082-|B | +-------+ | || * | | | 2112 2112 | | | EXP | | | | || 74132 | 7433|CD| 145 PA0-PA3 |E || * | | ROM | +--+ +--+ +--+ | ANS | |P | | |+-------+ |DI| +--+ 132 |X || * | | 7641 | | | | | | ION | |I | | |+------+------+ | S| | | +--+ |P || * | | | |A | |B | +-----+ | BUSES | |A | | || |SHIFT | | P| | | PA4-PA6 | | |A || * | | 512x8 | | | | | | | | (2 x) | | | | || RES |(led) | +--+ | | | | |N || * | | | +--+ +--+ | | | FOR | |A | | || | * | +--+ | | |S || * | +-------+ RAMS 4x256x4 | | | | | | | |+------+------+------+------+ +--+ |I || * | ROMS 2x512x8 2112 2112 | | | KEY | |E | | || | | | | |O || * | +-------+ +--+ +--+ |CPU | | BOARD | +------+ |X | | || ADR | RUN | SST | REG | |N || * | | | | | | | |6800 | | | | | |P | | || 0 | 4 | 8 | C | | || * | | ROM | |A | |B | | | | AND | | | |A | | |+------+------+------+------+ |C || * | | 7641 | | | | | | | | | | | |N | | || | | | | |O || * | | | +--+ +--+ | | | I/O | | 6820 | |S | | || STA | STO | BPR | BPS | |N || * | | 512x8 | 512 bytes RAM | | | BOARDS| | PIA | |I | | || 1 | 5 | 9 | D | |N || * | +-------+ | | | | | #1 | |O | +-----+ |+------+------+------+------+ +------+ |E || * | 1024 bytes ROM | | | | | | |N | | | || | | | | | | |C || * | +-----+ | | | | | | PIA A | | || EXF | EXB | MOV | PRM | | | |T || * | 7402 7412 | | | | |B | EXPANSION| | || 2 | 6 | A | E | | | |O || * | +--+ +--+ | | | | |U | CONNECTOR| | |+------+------+------+------+ | 6820 | |R || * | | | | | | | | | |S | | _| || | | | | | PIA | | || * | | | | | | | | | | | J4 | | || CLR | REL | REC | PLA | | #2 | | || * | | | | | | | +------+ | | | |_ || 3 | 7 | B | F | | | | || * | +--+ +--+ +--------+ | | | | | | |+------+------+------+------+ | | | || * | +-+ | 96LS02 | | | | | | | | +-------+ +-------+ +------+ | | | || * | R * * * R |T| +--------+ | | | | | | | | 74148 | | 74148 | | 7400 | | | | || * | O X A |R| | | | | | | | +-------+ +-------+ +------+ | | +--+| * | M * * * M |M| Oscillator circuits +-------+ +--+ | | | PB3 PB0-PB2 | | | * | |_| J1 J2 J3 +-----+ | +---------+ +------+ J1 | * |____________________________________________________________________________________________________________| |______ | _|||_ |___________________________________| * * _____________________________________________________________________________________________ ___________________________________________________________________________ * |The Didact Mikrodator 6802 CPU board by Lars Bjorklund 1983 ( ) | |The Didact Mikrodator 6802 TB16 board by Lars Bj??rklund 1983 | * | +----= | | +-|||||||-+ ______ | * | | = | | CA2 Tx |terminal | | () | | * | | = | | PA7 Rx +---------+ +----------+ C1nF,<=R18k| | | * | Photo of CPU board mainly covered by TB16 Keypad/Display board +--- = | | CA1 DTR +-----------+ | | CB2->CB1 | E | | * | | | PA4-PA6 | | 1 | BCD | +----+ | X | | * | | | ------->| 74LS145 | | digit 5 | |LS | | P | | * | | | +-----------+ |----------| | 122| | A | | * | +-----=| | | | | | | | N | | * | +-------+ | =| |------ +--------+ | 2 | BCD | | | | S | | * | | | | =| | RES* | SHIFT | LED( ) | | digit 4 | | | | I | | * | | | | =| | | '*' | CA2 v |----------| +----+ | O | | * | | 6821 | | =| | PA3 |PA7 PA2 | PA1 PA0 | | +----| N | | * | | PIA | | =| |----|--+-----|--+--|-----+--|---+ 3 | | PB0-|LS | | | * | | | | =| | v | v | v | v | | BCD | PB7| 244| C | | * | | | | =| | ADR | RUN | SST | CON | 1 | digit 3 | --->| | O | | * | | | | =| | 0 | 4 | 8 | C | |----------| | | N | | * | | | | =| |-------+--------+--------+------+ | |<-------| | N | | * | | | | =| | | | | | 4 | | +----| E | | * | | | | =| | STA | BPS | USERV | | 2 | BCD | | C | | * | | | | =| | 1 | 5 | 9 | D | | digit 2 | | T | | * | | | | =| |-------+--------+--------+------+ |----------| | O | | * | | | | =| | | | | | | | | R | | * | | | | =| | EXF | EXB | MOV | LOAD | 3 5 | BCD | | | | * | | | | =| | 2 | 6 | A | E | | digit 1 | | | | * | +-------+ | =| |-------+--------+--------+------+ |----------| | | | * | | =| | | | | | | | | | | * | +-----=| | CLR | SP | USERJ | FLAG | 4 6 | BCD | | | | * | | | 3 | 7 | B | F | | digit 0 | | () | | * | | |-------+--------+--------+------+ +----------+ +------+ | * | | | | * | | | | * |____________________________________________________________________________________________| |___________________________________________________________________________| * * History of Didact *------------------ * Didact Laromedelsproduktion was started in Linkoping in Sweden by Anders Andersson, Arne Kullbjer and * Lars Bjorklund. They constructed a series of microcomputers for educational purposes such as "Mikrodator 6802", * Esselte 100 and the Candela computer for the swedish schools to educate the students in assembly programming * and BASIC for electro mechanical applications such as stepper motors, simple process control, buttons * and LED:s. Didact designs were marketed by Esselte Studium to the swedish schools. The Candela computer * was designed to be the big breakthough and was based on OS9 but lost the battle of the swedish schools to * the Compis computer by TeleNova which was based on CP/M initially but later both lost to IBM PC. * * Misc links about the boards supported by this driver. *----------------------------------------------------- * http://elektronikforumet.com/forum/viewtopic.php?f=11&t=51424 * http://kilroy71.fastmail.fm/gallery/Miscellaneous/20120729_019.jpg * http://elektronikforumet.com/forum/download/file.php?id=63988&mode=view * http://elektronikforumet.com/forum/viewtopic.php?f=2&t=79576&start=150#p1203915 * * TODO: * Didact designs: mp68a, md6802, md6802v3, Esselte 100, Candela * -------------------------------------------------------------------------- * - Add PCB layouts OK OK * - Dump ROM:s, OK OK * - Keyboard OK OK * - Display/CRT OK OK * - Clickable Artwork RQ RQ * - Sound NA NA * - Cassette i/f * - Expansion bus * - Expansion overlay * ****************************************************************************/ #include "emu.h" #include "cpu/m6800/m6800.h" #include "machine/6821pia.h" // For all boards #include "video/dm9368.h" // For the mp68a #include "machine/74145.h" // For the md6802 // Generated artwork includes #include "mp68a.lh" #include "md6802.lh" #define VERBOSE 0 #define LOG(x) do { if (VERBOSE) logerror x; } while (0) #if VERBOSE >= 2 #define logerror printf #endif #ifdef _MSC_VER #define FUNCNAME __func__ #else #define FUNCNAME __PRETTY_FUNCTION__ #endif /* Didact base class */ class didact_state : public driver_device { public: didact_state(const machine_config &mconfig, device_type type, const char * tag) : driver_device(mconfig, type, tag) ,m_io_line0(*this, "LINE0") ,m_io_line1(*this, "LINE1") ,m_io_line2(*this, "LINE2") ,m_io_line3(*this, "LINE3") ,m_io_line4(*this, "LINE4") ,m_line0(0) ,m_line1(0) ,m_line2(0) ,m_line3(0) ,m_reset(0) ,m_shift(0) ,m_led(0) { } required_ioport m_io_line0; required_ioport m_io_line1; required_ioport m_io_line2; required_ioport m_io_line3; required_ioport m_io_line4; UINT8 m_line0; UINT8 m_line1; UINT8 m_line2; UINT8 m_line3; UINT8 m_reset; UINT8 m_shift; UINT8 m_led; TIMER_DEVICE_CALLBACK_MEMBER(scan_artwork); }; /* Esselte 100 driver class */ class e100_state : public didact_state { public: e100_state(const machine_config &mconfig, device_type type, const char * tag) : didact_state(mconfig, type, tag), m_maincpu(*this, "maincpu"), m_pia1(*this, "pia1"), m_pia2(*this, "pia2") { } required_device m_maincpu; virtual void machine_reset() override { m_maincpu->reset(); LOG(("--->%s()\n", FUNCNAME)); }; protected: required_device m_pia1; required_device m_pia2; }; /* Mikrodator 6802 driver class */ class md6802_state : public didact_state { public: md6802_state(const machine_config &mconfig, device_type type, const char * tag) : didact_state(mconfig, type, tag) ,m_maincpu(*this, "maincpu") ,m_tb16_74145(*this, "tb16_74145") ,m_segments(0) ,m_pia1(*this, "pia1") ,m_pia2(*this, "pia2") { } required_device m_maincpu; required_device m_tb16_74145; UINT8 m_segments; DECLARE_READ8_MEMBER( pia2_kbA_r ); DECLARE_WRITE8_MEMBER( pia2_kbA_w ); DECLARE_READ8_MEMBER( pia2_kbB_r ); DECLARE_WRITE8_MEMBER( pia2_kbB_w ); DECLARE_WRITE_LINE_MEMBER( pia2_ca2_w); virtual void machine_reset() override; virtual void machine_start() override; protected: required_device m_pia1; required_device m_pia2; }; /* Keyboard */ READ8_MEMBER( md6802_state::pia2_kbA_r ) { UINT8 ls145; UINT8 pa = 0xff; // Read out the selected column ls145 = m_tb16_74145->read() & 0x0f; // read out the artwork, line04 is handled by the timer m_line0 = m_io_line0->read(); m_line1 = m_io_line1->read(); m_line2 = m_io_line2->read(); m_line3 = m_io_line3->read(); #if VERBOSE > 2 if ((m_line0 | m_line1 | m_line2 | m_line3) != 0) LOG(("%s()-->%02x %02x %02x %02x modified by %02x displaying %02x\n", FUNCNAME, m_line0, m_line1, m_line2, m_line3, m_shift, ls145)); #endif // Mask out those rows that has a button pressed pa &= ~(((~m_line0 & ls145 ) != 0) ? 1 : 0); pa &= ~(((~m_line1 & ls145 ) != 0) ? 2 : 0); pa &= ~(((~m_line2 & ls145 ) != 0) ? 4 : 0); pa &= ~(((~m_line3 & ls145 ) != 0) ? 8 : 0); if (m_shift) { pa &= 0x7f; // Clear shift bit if button being pressed (PA7) to ground (internal pullup) LOG( ("SHIFT is pressed\n") ); } #if VERBOSE > 2 if ((m_line0 | m_line1 | m_line2 | m_line3) != 0) LOG(("%s()-->LINE: 0:%02x 1:%02x 2:%02x 3:%02x SHIFT:%02x LS145:%02x PA:%02x\n", FUNCNAME, m_line0, m_line1, m_line2, m_line3, m_shift, ls145, pa)); #endif return pa; } /* Pull the cathodes low enabling the correct digit and lit the segments held by port B */ WRITE8_MEMBER( md6802_state::pia2_kbA_w ) { UINT8 digit_nbr; // LOG(("--->%s(%02x)\n", FUNCNAME, data)); digit_nbr = (data >> 4) & 0x07; m_tb16_74145->write( digit_nbr ); if (digit_nbr < 6) { output().set_digit_value( digit_nbr, m_segments); } } /* PIA 2 Port B is all outputs to drive the display so it is very unlikelly that this function is called */ READ8_MEMBER( md6802_state::pia2_kbB_r ) { LOG( ("Warning, trying to read from Port B designated to drive the display, please check why\n") ); logerror("Warning, trying to read from Port B designated to drive the display, please check why\n"); return 0; } /* Port B is fully used ouputting the segment pattern to the display */ WRITE8_MEMBER( md6802_state::pia2_kbB_w ) { // LOG(("--->%s(%02x)\n", FUNCNAME, data)); /* Store the segment pattern but do not lit up the digit here, done by pulling the correct cathode low on Port A */ m_segments = BITSWAP8(data, 0, 4, 5, 3, 2, 1, 7, 6); } WRITE_LINE_MEMBER( md6802_state::pia2_ca2_w ) { LOG(("--->%s(%02x) LED is connected through resisitor to +5v so logical 0 will lit it\n", FUNCNAME, state)); output().set_led_value(m_led, !state); m_shift = !state; } void md6802_state::machine_start() { LOG(("--->%s()\n", FUNCNAME)); save_item(NAME(m_shift)); save_item(NAME(m_led)); save_item(NAME(m_reset)); } void md6802_state::machine_reset() { LOG(("--->%s()\n", FUNCNAME)); m_led = 1; m_maincpu->reset(); } /* Didact mp68a driver class */ // Just a statement that the real mp68a hardware was designed with 6820 and not 6821 // They are functional equivalents BUT has different electrical characteristics. #define pia6820_device pia6821_device #define PIA6820 PIA6821 class mp68a_state : public didact_state { public: mp68a_state(const machine_config &mconfig, device_type type, const char * tag) : didact_state(mconfig, type, tag) ,m_maincpu(*this, "maincpu") ,m_digit0(*this, "digit0") ,m_digit1(*this, "digit1") ,m_digit2(*this, "digit2") ,m_digit3(*this, "digit3") ,m_digit4(*this, "digit4") ,m_digit5(*this, "digit5") ,m_pia1(*this, "pia1") ,m_pia2(*this, "pia2") { } required_device m_maincpu; // The display segment driver device (there is actually just one, needs rewrite to be correct) required_device m_digit0; required_device m_digit1; required_device m_digit2; required_device m_digit3; required_device m_digit4; required_device m_digit5; DECLARE_READ8_MEMBER( pia2_kbA_r ); DECLARE_WRITE8_MEMBER( pia2_kbA_w ); DECLARE_READ8_MEMBER( pia2_kbB_r ); DECLARE_WRITE8_MEMBER( pia2_kbB_w ); DECLARE_READ_LINE_MEMBER( pia2_cb1_r ); virtual void machine_reset() override; virtual void machine_start() override; protected: required_device m_pia1; required_device m_pia2; }; READ8_MEMBER( mp68a_state::pia2_kbA_r ) { LOG(("--->%s\n", FUNCNAME)); return 0; } WRITE8_MEMBER( mp68a_state::pia2_kbA_w ) { UINT8 digit_nbr; #if VERBOSE > 1 static UINT8 display[] = {' ',' ',' ',' ',' ',' ',' ',' ','\0'}; const UINT8 hex[] = {' ','0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'}; #endif /* Display memory is at $702 to $708 in AAAADD format (A=address digit, D=Data digit) but we are using data read from the port. */ digit_nbr = (data >> 4) & 0x07; /* There is actually only one 9368 and a 74145 to drive the cathode of the right digit low */ /* This can be emulated by prentending there are one 9368 per digit, at least for now */ switch (digit_nbr) { case 0: m_digit0->a_w(data & 0x0f); break; case 1: m_digit1->a_w(data & 0x0f); break; case 2: m_digit2->a_w(data & 0x0f); break; case 3: m_digit3->a_w(data & 0x0f); break; case 4: m_digit4->a_w(data & 0x0f); break; case 5: m_digit5->a_w(data & 0x0f); break; case 7: break; // used as an 'unselect' by the ROM between digit accesses. default: logerror("Invalid digit index %d\n", digit_nbr); } #if VERBOSE > 1 display[(data >> 4) & 0x07] = hex[data & 0x0f]; LOG(("--->%s(%02x) ==> %s\n", FUNCNAME, data, display)); #endif } READ8_MEMBER( mp68a_state::pia2_kbB_r ) { UINT8 a012, line, pb; LOG(("--->%s %02x %02x %02x %02x %02x => ", FUNCNAME, m_line0, m_line1, m_line2, m_line3, m_shift)); a012 = 0; if ((line = (m_line0 | m_line1)) != 0) { a012 = 8; while (a012 > 0 && !(line & (1 << --a012))); a012 += 8; } if ( a012 == 0 && (line = ((m_line2) | m_line3)) != 0) { a012 = 8; while (a012 > 0 && !(line & (1 << --a012))); } pb = a012; // A0-A2 -> PB0-PB3 if (m_shift) { pb |= 0x80; // Set shift bit (PB7) m_shift = 0; // Reset flip flop output().set_led_value(m_led, m_shift); LOG( ("SHIFT is released\n") ); } LOG(("%02x\n", pb)); return pb; } WRITE8_MEMBER( mp68a_state::pia2_kbB_w ) { LOG(("--->%s(%02x)\n", FUNCNAME, data)); } READ_LINE_MEMBER( mp68a_state::pia2_cb1_r ) { m_line0 = m_io_line0->read(); m_line1 = m_io_line1->read(); m_line2 = m_io_line2->read(); m_line3 = m_io_line3->read(); #if VERBOSE if ((m_line0 | m_line1 | m_line2 | m_line3) != 0) LOG(("%s()-->%02x %02x %02x %02x\n", FUNCNAME, m_line0, m_line1, m_line2, m_line3)); #endif return (m_line0 | m_line1 | m_line2 | m_line3) != 0 ? 0 : 1; } void mp68a_state::machine_reset() { LOG(("--->%s()\n", FUNCNAME)); m_maincpu->reset(); } void mp68a_state::machine_start() { LOG(("--->%s()\n", FUNCNAME)); /* register for state saving */ save_item(NAME(m_shift)); save_item(NAME(m_led)); save_item(NAME(m_reset)); } // This map is derived from info in "TEMAL 100 - teknisk manual Esselte 100" static ADDRESS_MAP_START( e100_map, AS_PROGRAM, 8, e100_state ) AM_RANGE(0x0000, 0x1fff) AM_RAM AM_RANGE(0xc000, 0xc3ff) AM_RAM AM_SHARE("videoram") AM_RANGE(0xc808, 0xc80b) AM_DEVREADWRITE("pia1", pia6821_device, read, write) AM_RANGE(0xc810, 0xc813) AM_DEVREADWRITE("pia2", pia6821_device, read, write) AM_RANGE(0xd000, 0xffff) AM_ROM AM_REGION("maincpu", 0xd000) ADDRESS_MAP_END // This address map is traced from schema static ADDRESS_MAP_START( md6802_map, AS_PROGRAM, 8, md6802_state ) AM_RANGE(0x0000, 0x07ff) AM_RAM AM_MIRROR(0x1800) AM_RANGE(0xa000, 0xa003) AM_DEVREADWRITE("pia1", pia6821_device, read, write) AM_MIRROR(0x1ffc) AM_RANGE(0xc000, 0xc003) AM_DEVREADWRITE("pia2", pia6821_device, read, write) AM_MIRROR(0x1ffc) AM_RANGE(0xe000, 0xe7ff) AM_ROM AM_MIRROR(0x1800) AM_REGION("maincpu", 0xe000) ADDRESS_MAP_END // This address map is traced from pcb static ADDRESS_MAP_START( mp68a_map, AS_PROGRAM, 8, mp68a_state ) AM_RANGE(0x0000, 0x00ff) AM_RAM AM_MIRROR(0xf000) AM_RANGE(0x0500, 0x0503) AM_DEVREADWRITE("pia1", pia6820_device, read, write) AM_MIRROR(0xf0fc) AM_RANGE(0x0600, 0x0603) AM_DEVREADWRITE("pia2", pia6820_device, read, write) AM_MIRROR(0xf0fc) AM_RANGE(0x0700, 0x07ff) AM_RAM AM_MIRROR(0xf000) AM_RANGE(0x0800, 0x0bff) AM_ROM AM_MIRROR(0xf400) AM_REGION("maincpu", 0x0800) ADDRESS_MAP_END /* Input ports */ static INPUT_PORTS_START( e100 ) INPUT_PORTS_END static INPUT_PORTS_START( md6802 ) PORT_START("LINE0") /* KEY ROW 0 */ PORT_BIT(0x01, 0x01, IPT_KEYBOARD) PORT_NAME("0") PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_BIT(0x02, 0x02, IPT_KEYBOARD) PORT_NAME("1") PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_BIT(0x04, 0x04, IPT_KEYBOARD) PORT_NAME("2") PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_BIT(0x08, 0x08, IPT_KEYBOARD) PORT_NAME("3") PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_BIT(0xf0, 0x00, IPT_UNUSED ) PORT_START("LINE1") /* KEY ROW 1 */ PORT_BIT(0x01, 0x01, IPT_KEYBOARD) PORT_NAME("4") PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_BIT(0x02, 0x02, IPT_KEYBOARD) PORT_NAME("5") PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_BIT(0x04, 0x04, IPT_KEYBOARD) PORT_NAME("6") PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_BIT(0x08, 0x08, IPT_KEYBOARD) PORT_NAME("7") PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_BIT(0xf0, 0x00, IPT_UNUSED ) PORT_START("LINE2") /* KEY ROW 2 */ PORT_BIT(0x01, 0x01, IPT_KEYBOARD) PORT_NAME("8") PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_BIT(0x02, 0x02, IPT_KEYBOARD) PORT_NAME("9") PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_BIT(0x04, 0x04, IPT_KEYBOARD) PORT_NAME("A") PORT_CODE(KEYCODE_A) PORT_CHAR('A') PORT_BIT(0x08, 0x08, IPT_KEYBOARD) PORT_NAME("B") PORT_CODE(KEYCODE_B) PORT_CHAR('B') PORT_BIT(0xf0, 0x00, IPT_UNUSED ) PORT_START("LINE3") /* KEY ROW 3 */ PORT_BIT(0x01, 0x01, IPT_KEYBOARD) PORT_NAME("C") PORT_CODE(KEYCODE_C) PORT_CHAR('C') PORT_BIT(0x02, 0x02, IPT_KEYBOARD) PORT_NAME("D") PORT_CODE(KEYCODE_D) PORT_CHAR('D') PORT_BIT(0x04, 0x04, IPT_KEYBOARD) PORT_NAME("E") PORT_CODE(KEYCODE_E) PORT_CHAR('E') PORT_BIT(0x08, 0x08, IPT_KEYBOARD) PORT_NAME("F") PORT_CODE(KEYCODE_F) PORT_CHAR('F') PORT_BIT(0xf0, 0x00, IPT_UNUSED ) PORT_START("LINE4") /* Special KEY ROW for reset and Shift/'*' keys */ PORT_BIT(0x08, 0x00, IPT_KEYBOARD) PORT_NAME("*") PORT_CODE(KEYCODE_LSHIFT) PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR('*') PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_NAME("Reset") PORT_CODE(KEYCODE_F12) PORT_BIT(0xf3, 0x00, IPT_UNUSED ) INPUT_PORTS_END static INPUT_PORTS_START( mp68a ) PORT_START("LINE0") /* KEY ROW 0 */ PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("C") PORT_CODE(KEYCODE_C) PORT_CHAR('C') PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("D") PORT_CODE(KEYCODE_D) PORT_CHAR('D') PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("E") PORT_CODE(KEYCODE_E) PORT_CHAR('E') PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("F") PORT_CODE(KEYCODE_F) PORT_CHAR('F') PORT_BIT(0x0f, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_START("LINE1") /* KEY ROW 1 */ PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("8") PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("9") PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("A") PORT_CODE(KEYCODE_A) PORT_CHAR('A') PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("B") PORT_CODE(KEYCODE_B) PORT_CHAR('B') PORT_BIT(0xf0, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_START("LINE2") /* KEY ROW 2 */ PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("4") PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("5") PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("6") PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("7") PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_BIT(0x0f, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_START("LINE3") /* KEY ROW 3 */ PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("0") PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("1") PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("2") PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("3") PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_BIT(0xf0, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_START("LINE4") /* Special KEY ROW for reset and Shift/'*' keys */ PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("*") PORT_CODE(KEYCODE_LSHIFT) PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR('*') PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Reset") PORT_CODE(KEYCODE_F12) PORT_BIT(0xf3, IP_ACTIVE_HIGH, IPT_UNUSED ) INPUT_PORTS_END TIMER_DEVICE_CALLBACK_MEMBER(didact_state::scan_artwork) { // LOG(("--->%s()\n", FUNCNAME)); // Poll the artwork Reset key if ( (m_io_line4->read() & 0x04) ) { LOG( ("RESET is pressed, resetting the CPU\n") ); m_shift = 0; output().set_led_value(m_led, m_shift); // For mp68a only if (m_reset == 0) { machine_reset(); } m_reset = 1; // Inhibit multiple resets } // Poll the artwork SHIFT/* key else if ( (m_io_line4->read() & 0x08) ) { LOG( ("%s", !m_shift ? "SHIFT is set\n" : "") ); m_shift = 1; output().set_led_value(m_led, m_shift); // For mp68a only } else { if (m_reset == 1) { m_reset = 0; // Enable reset again } } } static MACHINE_CONFIG_START( e100, e100_state ) MCFG_CPU_ADD("maincpu", M6802, XTAL_4MHz) MCFG_CPU_PROGRAM_MAP(e100_map) /* devices */ MCFG_DEVICE_ADD("pia1", PIA6821, 0) MCFG_DEVICE_ADD("pia2", PIA6821, 0) MACHINE_CONFIG_END static MACHINE_CONFIG_START( md6802, md6802_state ) MCFG_CPU_ADD("maincpu", M6802, XTAL_4MHz) MCFG_CPU_PROGRAM_MAP(md6802_map) MCFG_DEFAULT_LAYOUT(layout_md6802) /* Devices */ MCFG_DEVICE_ADD("tb16_74145", TTL74145, 0) /* PIA #1 0xA000-0xA003 - used differently by laborations and loaded software */ MCFG_DEVICE_ADD("pia1", PIA6821, 0) /* PIA #2 Keyboard & Display 0xC000-0xC003 */ MCFG_DEVICE_ADD("pia2", PIA6821, 0) /* --init----------------------- */ /* 0xE007 0xC002 (DDR B) = 0xFF - Port B all outputs and set to 0 (zero) */ /* 0xE00B 0xC000 (DDR A) = 0x70 - Port A three outputs and set to 0 (zero) */ /* 0xE00F 0xC001 (Control A) = 0x3C - */ /* 0xE013 0xC003 (Control B) = 0x3C - */ /* --execution-wait for key loop-- */ /* 0xE026 0xC000 = (Reading Port A) */ /* 0xE033 0xC000 = (Reading Port A) */ /* 0xE068 0xC000 (Port A) = 0x60 */ /* 0xE08A 0xC002 (Port B) = 0xEE - updating display */ /* 0xE090 0xC000 (Port A) = 0x00 - looping in 0x10,0x20,0x30,0x40,0x50 */ MCFG_PIA_WRITEPA_HANDLER(WRITE8(md6802_state, pia2_kbA_w)) MCFG_PIA_READPA_HANDLER(READ8(md6802_state, pia2_kbA_r)) MCFG_PIA_WRITEPB_HANDLER(WRITE8(md6802_state, pia2_kbB_w)) MCFG_PIA_READPB_HANDLER(READ8(md6802_state, pia2_kbB_r)) MCFG_PIA_CA2_HANDLER(WRITELINE(md6802_state, pia2_ca2_w)) MCFG_TIMER_DRIVER_ADD_PERIODIC("artwork_timer", md6802_state, scan_artwork, attotime::from_hz(10)) MACHINE_CONFIG_END static MACHINE_CONFIG_START( mp68a, mp68a_state ) // Clock source is based on a N9602N Dual Retriggerable Resettable Monostable Multivibrator oscillator at aprox 505KHz. // Trimpot seems broken/stuck at 5K Ohm thu. ROM code 1Ms delay loops suggest 1MHz+ MCFG_CPU_ADD("maincpu", M6800, 505000) MCFG_CPU_PROGRAM_MAP(mp68a_map) MCFG_DEFAULT_LAYOUT(layout_mp68a) /* Devices */ /* PIA #1 0x500-0x503 - used differently by laborations and loaded software */ MCFG_DEVICE_ADD("pia1", PIA6820, 0) /* PIA #2 Keyboard & Display 0x600-0x603 */ MCFG_DEVICE_ADD("pia2", PIA6820, 0) /* --init----------------------- */ /* 0x0BAF 0x601 (Control A) = 0x30 - CA2 is low and enable DDRA */ /* 0x0BB1 0x603 (Control B) = 0x30 - CB2 is low and enable DDRB */ /* 0x0BB5 0x600 (DDR A) = 0xFF - Port A all outputs and set to 0 (zero) */ /* 0x0BB9 0x602 (DDR B) = 0x50 - Port B two outputs and set to 0 (zero) */ /* 0x0BBD 0x601 (Control A) = 0x34 - CA2 is low and lock DDRA */ /* 0x0BBF 0x603 (Control B) = 0x34 - CB2 is low and lock DDRB */ /* 0x0BC3 0x602 (Port B) = 0x40 - Turn on display via RBI* on */ /* --execution-wait for key loop-- */ /* 0x086B Update display sequnc, see below */ /* 0x0826 CB1 read = 0x603 (Control B) - is a key presssed? */ MCFG_PIA_WRITEPA_HANDLER(WRITE8(mp68a_state, pia2_kbA_w)) MCFG_PIA_READPA_HANDLER(READ8(mp68a_state, pia2_kbA_r)) MCFG_PIA_WRITEPB_HANDLER(WRITE8(mp68a_state, pia2_kbB_w)) MCFG_PIA_READPB_HANDLER(READ8(mp68a_state, pia2_kbB_r)) MCFG_PIA_READCB1_HANDLER(READLINE(mp68a_state, pia2_cb1_r)) MCFG_PIA_IRQA_HANDLER(DEVWRITELINE("maincpu", m6800_cpu_device, irq_line)) /* Not used by ROM. Combined trace to CPU IRQ with IRQB */ MCFG_PIA_IRQB_HANDLER(DEVWRITELINE("maincpu", m6800_cpu_device, irq_line)) /* Not used by ROM. Combined trace to CPU IRQ with IRQA */ /* Display - sequence outputting all '0':s at start */ /* 0x086B 0x600 (Port A) = 0x00 */ /* 0x086B 0x600 (Port A) = 0x70 */ /* 0x086B 0x600 (Port A) = 0x10 */ /* 0x086B 0x600 (Port A) = 0x70 */ /* 0x086B 0x600 (Port A) = 0x20 */ /* 0x086B 0x600 (Port A) = 0x70 */ /* 0x086B 0x600 (Port A) = 0x30 */ /* 0x086B 0x600 (Port A) = 0x70 */ /* 0x086B 0x600 (Port A) = 0x40 */ /* 0x086B 0x600 (Port A) = 0x70 */ /* 0x086B 0x600 (Port A) = 0x50 */ /* 0x086B 0x600 (Port A) = 0x70 */ MCFG_DEVICE_ADD("digit0", DM9368, 0) MCFG_OUTPUT_INDEX(0) MCFG_DEVICE_ADD("digit1", DM9368, 0) MCFG_OUTPUT_INDEX(1) MCFG_DEVICE_ADD("digit2", DM9368, 0) MCFG_OUTPUT_INDEX(2) MCFG_DEVICE_ADD("digit3", DM9368, 0) MCFG_OUTPUT_INDEX(3) MCFG_DEVICE_ADD("digit4", DM9368, 0) MCFG_OUTPUT_INDEX(4) MCFG_DEVICE_ADD("digit5", DM9368, 0) MCFG_OUTPUT_INDEX(5) MCFG_TIMER_DRIVER_ADD_PERIODIC("artwork_timer", mp68a_state, scan_artwork, attotime::from_hz(10)) MACHINE_CONFIG_END // TODO: Get a ROM set ROM_START( e100 ) ROM_REGION(0x10000, "maincpu", 0) ROM_LOAD( "e100U201.bin", 0xd000, 0x0800, CRC(0ff53e1f) SHA1(52002ee22c032775dac383d408c44abe9244724f) ) ROM_LOAD( "e100U202.bin", 0xd800, 0x0800, CRC(0ff53e1f) SHA1(52002ee22c032775dac383d408c44abe9244724f) ) ROM_LOAD( "e100U203.bin", 0xe000, 0x0800, CRC(0ff53e1f) SHA1(52002ee22c032775dac383d408c44abe9244724f) ) ROM_LOAD( "e100U204.bin", 0xe800, 0x0800, CRC(0ff53e1f) SHA1(52002ee22c032775dac383d408c44abe9244724f) ) ROM_LOAD( "e100U205.bin", 0xf000, 0x0800, CRC(0ff53e1f) SHA1(52002ee22c032775dac383d408c44abe9244724f) ) ROM_LOAD( "e100U206.bin", 0xf800, 0x0800, CRC(0ff53e1f) SHA1(52002ee22c032775dac383d408c44abe9244724f) ) ROM_END // TODO split ROM image into proper ROM set ROM_START( md6802 ) // ROM image from http://elektronikforumet.com/forum/viewtopic.php?f=2&t=79576&start=135#p1203640 ROM_REGION(0x10000, "maincpu", 0) ROM_LOAD( "DIDACT.bin", 0xe000, 0x0800, CRC(50430b1d) SHA1(8e2172a9ae95b04f20aa14177df2463a286c8465) ) ROM_END ROM_START( mp68a ) // ROM image from http://elektronikforumet.com/forum/viewtopic.php?f=2&t=79576&start=135#p1203640 ROM_REGION(0x10000, "maincpu", 0) ROM_LOAD( "didactA.bin", 0x0800, 0x0200, CRC(aa05e1ce) SHA1(9ce8223efd274045b43ceca3529e037e16e99fdf) ) ROM_LOAD( "didactB.bin", 0x0a00, 0x0200, CRC(592898dc) SHA1(2962f4817712cae97f3ab37b088fc73e66535ff8) ) ROM_END // YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS COMP( 1979, mp68a, 0, 0, mp68a, mp68a, driver_device, 0, "Didact AB", "mp68a", MACHINE_NO_SOUND_HW ) COMP( 1982, e100, 0, 0, e100, e100, driver_device, 0, "Didact AB", "Esselte 100", MACHINE_IS_SKELETON ) COMP( 1983, md6802, 0, 0, md6802, md6802, driver_device, 0, "Didact AB", "Mikrodator 6802", MACHINE_NO_SOUND_HW )