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-// license:BSD-3-Clause
-// copyright-holders:Joakim Larsson Edstrom
-/*
- *
- * History of Didact and Esselte Studium
- *--------------------------------------
- * 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. Late designs like the
- * "Modulab v2" appears to have been owned or licensed to Esselte and enhanced with more modular monitor routines
- * in a project driven by Alf Karlsson.
- *
- * The Esselte 1000 was an educational package based on Apple II plus software and literature
- * but the relation to Didact is at this point unknown so it is probably a pure Esselte software production.
- *
- * 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, Modulab
- * ------------------------------------------
- * - Add PCB layouts OK OK OK
- * - Dump ROM:s, OK OK OK
- * - Keyboard OK OK OK
- * - Display/CRT OK OK OK
- * - Clickable Artwork RQ RQ OK
- * - Sound NA NA
- * - Cassette i/f
- * - Expansion bus
- * - Expansion overlay
- * - Interrupts OK
- * - Serial XX
- * XX = needs debug
- *********************************************/
-
-#include "emu.h"
-#include "cpu/m6800/m6800.h" // For all boards
-#include "machine/6821pia.h" // For all boards
-#include "machine/74145.h" // For the md6802
-#include "video/dm9368.h" // For the mp68a
-#include "machine/ins8154.h" // For the modulab
-#include "machine/mm74c922.h"// For the modulab
-#include "machine/rescap.h" // For the modulab
-
-// Features
-#include "imagedev/cassette.h"
-#include "bus/rs232/rs232.h"
-#include "screen.h"
-#include "speaker.h"
-
-// Generated artwork includes
-#include "mp68a.lh"
-#include "md6802.lh"
-#include "modulab.lh"
-
-//**************************************************************************
-// MACROS / CONSTANTS
-//**************************************************************************
-
-#define LOG_SETUP (1U << 1)
-#define LOG_READ (1U << 2)
-#define LOG_DISPLAY (1U << 3)
-#define LOG_KEYBOARD (1U << 4)
-
-//#define VERBOSE (LOG_KEYBOARD)
-//#define LOG_OUTPUT_FUNC printf
-#include "logmacro.h"
-
-#define LOGSETUP(...) LOGMASKED(LOG_SETUP, __VA_ARGS__)
-#define LOGREAD(...) LOGMASKED(LOG_READ, __VA_ARGS__)
-#define LOGDISPLAY(...) LOGMASKED(LOG_DISPLAY, __VA_ARGS__)
-#define LOGKBD(...) LOGMASKED(LOG_KEYBOARD, __VA_ARGS__)
-
-#ifdef _MSC_VER
-#define FUNCNAME __func__
-#else
-#define FUNCNAME __PRETTY_FUNCTION__
-#endif
-
-#define PIA1_TAG "pia1"
-#define PIA2_TAG "pia2"
-#define PIA3_TAG "pia3"
-#define PIA4_TAG "pia4"
-#define MM74C923_TAG "74c923"
-
-/* 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_cass(*this, "cassette")
- , m_io_lines(*this, "LINE%u", 0U)
- , m_lines{ 0, 0, 0, 0 }
- , m_rs232(*this, "rs232")
- , m_led(*this, "led1")
- { }
-
- DECLARE_INPUT_CHANGED_MEMBER(trigger_reset);
- DECLARE_INPUT_CHANGED_MEMBER(trigger_shift);
-protected:
- virtual void machine_start() override { m_led.resolve(); }
-
- optional_device<cassette_image_device> m_cass;
- required_ioport_array<5> m_io_lines;
- uint8_t m_lines[4];
- uint8_t m_reset;
- uint8_t m_shift;
- optional_device<rs232_port_device> m_rs232;
- output_finder<> m_led;
-};
-
-
-/* _____________________________________________________________________________________________ ___________________________________________________________________________
- * |The Didact Mikrodator 6802 CPU board by Lars Bjorklund 1983 ( ) | |The Didact Mikrodator 6802 TB16 board by Lars Bjorklund 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 | | () | |
- * | | |-------+--------+--------+------+ +----------+ +------+ |
- * | | | |
- * | | | |
- * |____________________________________________________________________________________________| |___________________________________________________________________________|
- */
-
-/* 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_pia1(*this, PIA1_TAG)
- , m_pia2(*this, PIA2_TAG)
- , m_7segs(*this, "digit%u", 0U)
- , m_segments(0)
- { }
-
- void md6802(machine_config &config);
-
-protected:
- 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;
-
- void md6802_map(address_map &map);
-
-private:
- required_device<m6802_cpu_device> m_maincpu;
- required_device<ttl74145_device> m_tb16_74145;
- required_device<pia6821_device> m_pia1;
- required_device<pia6821_device> m_pia2;
- output_finder<6> m_7segs;
- uint8_t m_segments;
-};
-
-/* Keyboard */
-READ8_MEMBER( md6802_state::pia2_kbA_r )
-{
- uint8_t ls145;
- uint8_t pa = 0xff;
-
- // Read out the selected column
- ls145 = m_tb16_74145->read() & 0x0f;
-
- // read out the artwork, line04 is handled by the timer
- for (unsigned i = 0U; 4U > i; ++i)
- {
- m_lines[i] = m_io_lines[i]->read();
-
- // Mask out those rows that has a button pressed
- pa &= ~(((~m_lines[i] & ls145) != 0) ? (1 << i) : 0);
- }
-
- if (m_shift)
- {
- pa &= 0x7f; // Clear shift bit if button being pressed (PA7) to ground (internal pullup)
- LOGKBD("SHIFT is pressed\n");
- }
-
- // Serial IN - needs debug/verification
- pa &= (m_rs232->rxd_r() != 0 ? 0xff : 0x7f);
-
- 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 )
-{
-// LOG("--->%s(%02x)\n", FUNCNAME, data);
-
- uint8_t const digit_nbr((data >> 4) & 0x07);
- m_tb16_74145->write(digit_nbr);
- if (digit_nbr < 6)
- m_7segs[digit_nbr] = m_segments;
-}
-
-/* PIA 2 Port B is all outputs to drive the display so it is very unlikely 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 = bitswap<8>(data, 0, 4, 5, 3, 2, 1, 7, 6);
-}
-
-WRITE_LINE_MEMBER( md6802_state::pia2_ca2_w )
-{
- LOGKBD("--->%s(%02x) LED is connected through resisitor to +5v so logical 0 will lit it\n", FUNCNAME, state);
- m_led = state ? 0 :1;
-
- // Serial Out - needs debug/verification
- m_rs232->write_txd(state);
-
- m_shift = !state;
-}
-
-void md6802_state::machine_start()
-{
- LOG("--->%s()\n", FUNCNAME);
-
- didact_state::machine_start();
- m_7segs.resolve();
-
- save_item(NAME(m_reset));
- save_item(NAME(m_shift));
-}
-
-void md6802_state::machine_reset()
-{
- LOG("--->%s()\n", FUNCNAME);
- m_maincpu->reset();
-}
-
-// This address map is traced from schema
-void md6802_state::md6802_map(address_map &map)
-{
- map(0x0000, 0x07ff).ram().mirror(0x1800);
- map(0xa000, 0xa003).rw(m_pia1, FUNC(pia6821_device::read), FUNC(pia6821_device::write)).mirror(0x1ffc);
- map(0xc000, 0xc003).rw(m_pia2, FUNC(pia6821_device::read), FUNC(pia6821_device::write)).mirror(0x1ffc);
- map(0xe000, 0xe7ff).rom().mirror(0x1800).region("maincpu", 0xe000);
-}
-
-/*
- * ___________________________________________________________________________________________________________ _____________________________________________________
- * | 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 |
- * |____________________________________________________________________________________________________________| |______ | _|||_ |___________________________________|
- *
- */
-/* 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.
-// 2019-07-27 Cassette added: saves ok, load is unreliable, probably an original design problem.
-#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_digits(*this, "digit%u", 0U)
- , m_7segs(*this, "digit%u", 0U)
- , m_pia1(*this, PIA1_TAG)
- , m_pia2(*this, PIA2_TAG)
- { }
-
- required_device<m6800_cpu_device> m_maincpu;
-
- // The display segment driver device (there is actually just one, needs rewrite to be correct)
- required_device_array<dm9368_device, 6> m_digits;
- output_finder<6> m_7segs;
-
- 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 );
- template <unsigned N> DECLARE_WRITE8_MEMBER( digit_w ) { m_7segs[N] = data; }
-
- virtual void machine_reset() override;
- virtual void machine_start() override;
- void mp68a(machine_config &config);
- void mp68a_map(address_map &map);
-protected:
- required_device<pia6820_device> m_pia1;
- required_device<pia6820_device> m_pia2;
-};
-
-INPUT_CHANGED_MEMBER(didact_state::trigger_shift)
-{
- if (newval == CLEAR_LINE)
- {
- LOGKBD("SHIFT is released\n");
- }
- else
- {
- LOGKBD("SHIFT is pressed\n");
- m_shift = 1;
- m_led = 1;
- }
-}
-
-READ8_MEMBER( mp68a_state::pia2_kbA_r )
-{
- LOG("--->%s\n", FUNCNAME);
-
- return 0;
-}
-
-WRITE8_MEMBER( mp68a_state::pia2_kbA_w )
-{
- /* 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. */
- uint8_t const 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 pretending there are one 9368 per digit, at least for now */
- switch (digit_nbr)
- {
- case 0:
- case 1:
- case 2:
- case 3:
- case 4:
- case 5:
- m_digits[digit_nbr]->a_w(data & 0x0f);
- break;
- case 7: // used as an 'unselect' by the ROM between digit accesses.
- break;
- default:
- logerror("Invalid digit index %d\n", digit_nbr);
- }
-}
-
-READ8_MEMBER( mp68a_state::pia2_kbB_r )
-{
- uint8_t a012, line, pb;
-
- LOGKBD("--->%s %02x %02x %02x %02x %02x => ", FUNCNAME, m_lines[0], m_lines[1], m_lines[2], m_lines[3], m_shift);
-
- a012 = 0;
- if ((line = (m_lines[0] | m_lines[1])) != 0)
- {
- a012 = 8;
- while (a012 > 0 && !(line & (1 << --a012)));
- a012 += 8;
- }
- if ( a012 == 0 && (line = ((m_lines[2]) | m_lines[3])) != 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
- m_led = 0;
- LOGKBD(" SHIFT is released\n");
- }
-
- pb |= (m_cass->input() < 0.04) ? 0x20 : 0;
- LOGKBD("%02x\n", pb);
-
- return pb;
-}
-
-WRITE8_MEMBER( mp68a_state::pia2_kbB_w )
-{
- LOG("--->%s(%02x)\n", FUNCNAME, data);
- m_cass->output(BIT(data, 4) ? -1.0 : +1.0);
-}
-
-READ_LINE_MEMBER( mp68a_state::pia2_cb1_r )
-{
- for (unsigned i = 0U; 4U > i; ++i)
- m_lines[i] = m_io_lines[i]->read();
-
- if ((VERBOSE & LOG_GENERAL) && (m_lines[0] | m_lines[1] | m_lines[2] | m_lines[3]))
- LOG("%s()-->%02x %02x %02x %02x\n", FUNCNAME, m_lines[0], m_lines[1], m_lines[2], m_lines[3]);
-
- return (m_lines[0] | m_lines[1] | m_lines[2] | m_lines[3]) ? 0 : 1;
-}
-
-void mp68a_state::machine_reset()
-{
- LOG("--->%s()\n", FUNCNAME);
- m_maincpu->reset();
-}
-
-void mp68a_state::machine_start()
-{
- LOG("--->%s()\n", FUNCNAME);
-
- didact_state::machine_start();
- m_7segs.resolve();
-
- /* register for state saving */
- save_item(NAME(m_shift));
- save_item(NAME(m_reset));
-}
-
-// This address map is traced from pcb
-void mp68a_state::mp68a_map(address_map &map)
-{
- map(0x0000, 0x00ff).ram().mirror(0xf000);
- map(0x0500, 0x0503).rw(m_pia1, FUNC(pia6820_device::read), FUNC(pia6820_device::write)).mirror(0xf0fc);
- map(0x0600, 0x0603).rw(m_pia2, FUNC(pia6820_device::read), FUNC(pia6820_device::write)).mirror(0xf0fc);
- map(0x0700, 0x07ff).ram().mirror(0xf000);
- map(0x0800, 0x0bff).rom().mirror(0xf400).region("maincpu", 0x0800);
-}
-
-//===================
-
-/* The Modulab CPU board, by Didact/Esselte ca 1984
- * __________________________________________________________________________________________
- * | ADRESS DATA |
- * | PORT A +-_--++-_--++-_--++-_--+ +-_--++-_--+ VCC |
- * | o o o o o o o o || | ||| | ||| | ||| | | || | ||| | | O |
- * | 7 6 5 4 3 2 1 0 | - || - || - || - | | - || - | |
- * | o o o o o o o o ||_|.|||_|.|||_|.|||_|.| ||_|.|||_|.| GND |
- * | PORT B +----++----++----++----+ +----++----+ O |
- * | o VCC +--+ +--+ +--+ +--+ +--+ +--+ |
- * | |LS| |LS| |LS| |LS| |LS| |LS| |
- * | o GND |164 |164 |164 |164 |164 |164 |
- * \\ |-5|<-|-4|<-|-3|<-|-2| <- |-1|<-|-0|<- DB0 |
- * |\\ ____ +--+ +--+ +--+ +--+ +--+ +--+ |
- * | \/o O| +-------+-------+-------+-------+-------+
- * | | |E +--------------------+ +--+ | | | | | |
- * | | |X +----+ | PIA + 128x8 SRAM | |LS| | RUN | ADS | FWD | C/B | RESET |
- * | | |P |4MHz| | INS8154N | |14| | | | | | |
- * | | |A |XTAL| +--------------------+ | | +-------+-------+-------+-------+-------+
- * | | |N |____| +--+ | | | | | |
- * | |__ |S | | +--------------------+ +--+ | C | D | E | F | |
- * | __| |I | CPU | |LS| | | | | | |
- * | | |O | MC6802P | |138 +-------+-------+-------+-------+ |
- * | | |N +--------------------+ | | | | | | | |
- * | | |B +--+ | 8 | 9 | A | B | |
- * | | |U IRQ +-------------+ +--+ | | | | | |
- * | | |S o | EPROM | |74| +-------+-------+-------+-------+ |
- * | /\o O| | 2764 | |C | | | | | | |
- * |// ---- +-------------+ |923 | 4 | 5 | 6 | 7 | |
- * // +-----------+ | | | | | | | |
- * | | 2KB SRAM | +--+ +-------+-------+-------+-------+ |
- * | | 6116 | +--+ | | | | | |
- * | +-----------+ |LS| | 0 | 1 | 2 | 3 | |
- * | ESSELTE +-------+ +---+ +--------+ |138 | | | | | |
- * | STUDIUM |74LS123| |TRM| |SN74367 | | | +-------+-------+-------+-------+ |
- * | +-------+ +---+ +--------+ +--+
- * |__________________________________________________________________________________________|
- *
- */
-
-/* Didact modulab driver class */
-class modulab_state : public didact_state
-{
- public:
- modulab_state(const machine_config &mconfig, device_type type, const char * tag)
- : didact_state(mconfig, type, tag)
- , m_maincpu(*this, "maincpu")
- , m_7segs(*this, "digit%u", 0U)
- , m_pia1(*this, PIA1_TAG)
- , m_kb(*this, MM74C923_TAG)
- , m_da(0)
- { }
-
- required_device<m6802_cpu_device> m_maincpu;
-
- output_finder<6> m_7segs;
-
- virtual void machine_reset() override;
- virtual void machine_start() override;
- void modulab(machine_config &config);
-protected:
- DECLARE_READ8_MEMBER( io_r );
- DECLARE_WRITE8_MEMBER( io_w );
- DECLARE_WRITE_LINE_MEMBER( da_w );
-private:
- void modulab_map(address_map &map);
- // Offsets for display and keyboard i/o
- enum
- {
- DISPLAY = 0,
- KEY_DATA = 2,
- KEY_STROBE = 3
- };
-
- // Simple emulation of 6 cascaded 74164 that drives the AAAADD BCD display elements, right to left
- class shift8
- {
- public:
- shift8(){ byte = 0; }
- void shiftIn(uint8_t in){ byte = ((byte << 1) & 0xfe) | (in & 1 ? 1 : 0); }
- uint8_t byte;
- };
- shift8 m_74164[6];
-
- required_device<ins8154_device> m_pia1;
- required_device<mm74c922_device> m_kb;
- uint8_t m_da;
-};
-
-WRITE_LINE_MEMBER( modulab_state::da_w )
-{
- LOG("--->%s()\n", FUNCNAME);
- m_da = state == CLEAR_LINE ? 0 : 1; // Capture data available signal
-}
-
-READ8_MEMBER(modulab_state::io_r)
-{
- switch (offset)
- {
- case 3: // Poll Data available signal
- return m_da & 0x01; // Data Available signal gated by an 8097 hexbuffer to DB0
- break;
- case 2:
- LOG("--->%s Read Keyboard @ %04x\n", FUNCNAME, offset);
- return m_kb->read();
- break;
- default:
- LOG("--->%s BAD access @ %04x\n", FUNCNAME, offset);
- break;
- }
- return 0;
-}
-
-WRITE8_MEMBER(modulab_state::io_w)
-{
- LOG("--->%s()\n", FUNCNAME);
- uint8_t b = data & 1;
- switch (offset)
- {
- case DISPLAY:
- // Update the BCD elements with a data bit b shifted in right to left, CS is used as clock for all 164's
- for (int i = 0; i < 6; i++)
- {
- uint8_t c = (m_74164[i].byte & 0x80) ? 1 : 0; // Bit 7 is connected to the next BCD right to left
- m_74164[i].shiftIn(b);
- m_7segs[i] = ~m_74164[i].byte & 0x7f; // Bit 0 to 6 drives the 7 seg display
- b = c; // bit 7 prior shift will be shifted in next (simultaneous in real life)
- }
- LOGDISPLAY("Shifted: %02x %02x %02x %02x %02x %02x\n",
- ~m_74164[0].byte & 0x7f, ~m_74164[1].byte & 0x7f, ~m_74164[2].byte & 0x7f,
- ~m_74164[3].byte & 0x7f, ~m_74164[4].byte & 0x7f, ~m_74164[5].byte & 0x7f);
- break;
- default:
- break;
- };
-}
-
-void modulab_state::machine_reset()
-{
- LOG("--->%s()\n", FUNCNAME);
-
- m_maincpu->reset();
-}
-
-void modulab_state::machine_start()
-{
- LOG("--->%s()\n", FUNCNAME);
-
- didact_state::machine_start();
- m_7segs.resolve();
-
- /* register for state saving */
- save_item(NAME(m_shift));
- save_item(NAME(m_reset));
-}
-
-// This address map is traced from pcb
-void modulab_state::modulab_map(address_map &map)
-{
- map(0x0000, 0x03ff).ram().mirror(0xe000); // RAM0 always present 2114
- map(0x0400, 0x07ff).ram().mirror(0xe000); // RAM1 optional 2114
- // map(0x0800, 0x13ff).ram().mirror(0xe000); // expansion port area consisting of 3 chip selects each selecting 0x3ff byte addresses
- map(0x1400, 0x17ff).rom().mirror(0xe000).region("maincpu", 0x0000);
- map(0x1800, 0x187f).rw(FUNC(modulab_state::io_r), FUNC(modulab_state::io_w)).mirror(0xe200);
- map(0x1900, 0x197f).rw(m_pia1, FUNC(ins8154_device::read_io), FUNC(ins8154_device::write_io)).mirror(0xe200);
- map(0x1980, 0x19ff).rw(m_pia1, FUNC(ins8154_device::read_ram), FUNC(ins8154_device::write_ram)).mirror(0xe200);
- map(0x1c00, 0x1fff).rom().mirror(0xe000).region("maincpu", 0x0400);
-}
-
-//===================
-
-static INPUT_PORTS_START( modulab )
- PORT_START("LINE0") // X1
- PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_0) PORT_CHAR('0')
- PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_4) PORT_CHAR('4')
- PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_8) PORT_CHAR('8')
- PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_C) PORT_CHAR('C')
- PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("RUN") PORT_CODE(KEYCODE_R) PORT_CHAR('R')
-
- PORT_START("LINE1") // X2
- PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_1) PORT_CHAR('1')
- PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_5) PORT_CHAR('5')
- PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_9) PORT_CHAR('9')
- PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_D) PORT_CHAR('D')
- PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("ADS") PORT_CODE(KEYCODE_Z) PORT_CHAR('Z')
-
- PORT_START("LINE2") // X3
- PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_2) PORT_CHAR('2')
- PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_6) PORT_CHAR('6')
- PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_A) PORT_CHAR('A')
- PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_E) PORT_CHAR('E')
- PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("FWD") PORT_CODE(KEYCODE_W) PORT_CHAR('W')
-
- PORT_START("LINE3") // X4
- PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_3) PORT_CHAR('3')
- PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_7) PORT_CHAR('7')
- PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_B) PORT_CHAR('B')
- PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F) PORT_CHAR('F')
- PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("C/B") PORT_CODE(KEYCODE_X) PORT_CHAR('X')
-
- PORT_START("LINE4") /* Special KEY ROW for reset key */
- PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Reset") PORT_CODE(KEYCODE_F12) PORT_CHANGED_MEMBER(DEVICE_SELF, modulab_state, trigger_reset, 0)
- PORT_BIT(0xfb, 0x00, IPT_UNUSED )
-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_CHANGED_MEMBER(DEVICE_SELF, md6802_state, trigger_shift, 0)
- PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_NAME("Reset") PORT_CODE(KEYCODE_F12) PORT_CHANGED_MEMBER(DEVICE_SELF, md6802_state, trigger_reset, 0)
- 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, they are hard wired */
- PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("*") PORT_CODE(KEYCODE_LSHIFT) PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR('*') PORT_CHANGED_MEMBER(DEVICE_SELF, mp68a_state, trigger_shift, 0)
- //PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Reset") PORT_CODE(KEYCODE_F12)
- PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Reset") PORT_CODE(KEYCODE_F12) PORT_CHANGED_MEMBER(DEVICE_SELF, mp68a_state, trigger_reset, 0)
- PORT_BIT(0xf3, IP_ACTIVE_HIGH, IPT_UNUSED )
-INPUT_PORTS_END
-
-INPUT_CHANGED_MEMBER(didact_state::trigger_reset)
-{
- if (newval == CLEAR_LINE)
- {
- LOGKBD("RESET is released, resetting the CPU\n");
- machine_reset();
- m_shift = 0;
- m_led = 0;
- }
-}
-
-
-void modulab_state::modulab(machine_config &config)
-{
- m6802_cpu_device &maincpu(M6802(config, m_maincpu, XTAL(4'000'000)));
- maincpu.set_ram_enable(false); // Schematics holds RAM enable low so that the M6802 internal RAM is disabled.
- maincpu.set_addrmap(AS_PROGRAM, &modulab_state::modulab_map);
- config.set_default_layout(layout_modulab);
-
- /* Devices */
- MM74C923(config, m_kb, 0);
- m_kb->set_cap_osc(CAP_U(0.10));
- m_kb->set_cap_debounce(CAP_U(1));
- m_kb->da_wr_callback().set(FUNC(modulab_state::da_w));
- m_kb->x1_rd_callback().set_ioport("LINE0");
- m_kb->x2_rd_callback().set_ioport("LINE1");
- m_kb->x3_rd_callback().set_ioport("LINE2");
- m_kb->x4_rd_callback().set_ioport("LINE3");
-
- /* PIA #1 0x????-0x??? - */
- INS8154(config, m_pia1);
- //m_ins8154->in_a().set(FUNC(modulab_state::ins8154_pa_r));
- //m_ins8154->out_a().set(FUNC(modulab_state::ins8154_pa_w));
-
- //RS232_PORT(config, m_rs232, default_rs232_devices, nullptr);
-}
-
-void md6802_state::md6802(machine_config &config)
-{
- m6802_cpu_device &maincpu(M6802(config, m_maincpu, XTAL(4'000'000)));
- maincpu.set_ram_enable(false);
- maincpu.set_addrmap(AS_PROGRAM, &md6802_state::md6802_map);
- config.set_default_layout(layout_md6802);
-
- /* Devices */
- TTL74145(config, m_tb16_74145, 0);
- /* PIA #1 0xA000-0xA003 - used differently by laborations and loaded software */
- PIA6821(config, m_pia1, 0);
-
- /* PIA #2 Keyboard & Display 0xC000-0xC003 */
- PIA6821(config, m_pia2, 0);
- /* --PIA 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 */
- m_pia2->writepa_handler().set(FUNC(md6802_state::pia2_kbA_w));
- m_pia2->readpa_handler().set(FUNC(md6802_state::pia2_kbA_r));
- m_pia2->writepb_handler().set(FUNC(md6802_state::pia2_kbB_w));
- m_pia2->readpb_handler().set(FUNC(md6802_state::pia2_kbB_r));
- m_pia2->ca2_handler().set(FUNC(md6802_state::pia2_ca2_w));
-
- RS232_PORT(config, m_rs232, default_rs232_devices, nullptr);
-}
-
-void mp68a_state::mp68a(machine_config &config)
-{
- // 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+
- M6800(config, m_maincpu, 505000);
- m_maincpu->set_addrmap(AS_PROGRAM, &mp68a_state::mp68a_map);
- config.set_default_layout(layout_mp68a);
-
- /* Devices */
- /* PIA #1 0x500-0x503 - used differently by laborations and loaded software */
- PIA6820(config, m_pia1, 0);
-
- /* PIA #2 Keyboard & Display 0x600-0x603 */
- PIA6820(config, m_pia2, 0);
- /* --PIA inits----------------------- */
- /* 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 pressed? */
- m_pia2->writepa_handler().set(FUNC(mp68a_state::pia2_kbA_w));
- m_pia2->readpa_handler().set(FUNC(mp68a_state::pia2_kbA_r));
- m_pia2->writepb_handler().set(FUNC(mp68a_state::pia2_kbB_w));
- m_pia2->readpb_handler().set(FUNC(mp68a_state::pia2_kbB_r));
- m_pia2->readcb1_handler().set(FUNC(mp68a_state::pia2_cb1_r));
- m_pia2->irqa_handler().set_inputline("maincpu", M6800_IRQ_LINE); /* Not used by ROM. Combined trace to CPU IRQ with IRQB */
- m_pia2->irqb_handler().set_inputline("maincpu", M6800_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 */
- DM9368(config, m_digits[0], 0).update_cb().set(FUNC(mp68a_state::digit_w<0>));
- DM9368(config, m_digits[1], 0).update_cb().set(FUNC(mp68a_state::digit_w<1>));
- DM9368(config, m_digits[2], 0).update_cb().set(FUNC(mp68a_state::digit_w<2>));
- DM9368(config, m_digits[3], 0).update_cb().set(FUNC(mp68a_state::digit_w<3>));
- DM9368(config, m_digits[4], 0).update_cb().set(FUNC(mp68a_state::digit_w<4>));
- DM9368(config, m_digits[5], 0).update_cb().set(FUNC(mp68a_state::digit_w<5>));
-
- /* Cassette */
- SPEAKER(config, "mono").front_center();
- CASSETTE(config, m_cass);
- m_cass->set_default_state(CASSETTE_STOPPED | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_ENABLED);
- m_cass->add_route(ALL_OUTPUTS, "mono", 0.05);
-}
-
-ROM_START( modulab )
- ROM_REGION(0x10000, "maincpu", 0)
- ROM_DEFAULT_BIOS("modulabvl")
-
- ROM_SYSTEM_BIOS(0, "modulabv1", "Modulab Version 1")
- ROMX_LOAD( "mlab1_00.bin", 0x0000, 0x0800, NO_DUMP, ROM_BIOS(0) )
-
- ROM_SYSTEM_BIOS(1, "modulabv2", "Modulab Version 2")
- ROMX_LOAD( "mlab2_00.bin", 0x0000, 0x0800, NO_DUMP, ROM_BIOS(1) )
-
- ROM_SYSTEM_BIOS(2, "modulabvl", "Modulab Prototype")
- ROMX_LOAD( "modulab_levererad.bin", 0x0000, 0x0800, CRC(40774ef4) SHA1(9cf188342993fbcff13dbbecc62d1ee49010d6f4), ROM_BIOS(2) )
-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, mp68a_state, empty_init, "Didact AB", "mp68a", MACHINE_NO_SOUND_HW )
-COMP( 1983, md6802, 0, 0, md6802, md6802, md6802_state, empty_init, "Didact AB", "Mikrodator 6802", MACHINE_NO_SOUND_HW )
-COMP( 1984, modulab, 0, 0, modulab, modulab, modulab_state, empty_init, "Esselte Studium AB", "Modulab", MACHINE_NO_SOUND_HW )