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// license:BSD-3-Clause
// copyright-holders:Joakim Larsson Edstrom
/*
*
* 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 Esselte 1000 was an educational package based on Apple II plus software and litterature
* 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, Esselte 100
* -------------------------------------------------------
* - Add PCB layouts OK OK OK
* - Dump ROM:s, OK OK rev2
* - Keyboard OK OK rev2
* - Display/CRT OK OK OK
* - Clickable Artwork RQ RQ
* - Sound NA NA
* - Cassette i/f OK
* - Expansion bus
* - Expansion overlay
* - Interrupts OK OK
* - Serial XX XX
* XX = needs debug
****************************************************************************/
#include "emu.h"
#include "cpu/m6800/m6800.h" // For mp68a, md6802
#include "machine/6821pia.h" // For all boards
#include "machine/74145.h" // For the md6802
#include "machine/timer.h"
#include "video/dm9368.h" // For the mp68a
// Features
#include "imagedev/cassette.h"
#include "bus/rs232/rs232.h"
#include "screen.h"
// Generated artwork includes
#include "mp68a.lh"
#include "md6802.lh"
//**************************************************************************
// MACROS / CONSTANTS
//**************************************************************************
#define LOG_SETUP (1U << 1)
#define LOG_SCAN (1U << 2)
#define LOG_BANK (1U << 3)
#define LOG_SCREEN (1U << 4)
#define LOG_READ (1U << 5)
#define LOG_CS (1U << 6)
#define LOG_PLA (1U << 7)
#define LOG_PROM (1U << 8)
//#define VERBOSE (LOG_READ | LOG_GENERAL | LOG_SETUP | LOG_PLA | LOG_BANK)
//#define LOG_OUTPUT_FUNC printf
#include "logmacro.h"
#define LOGSETUP(...) LOGMASKED(LOG_SETUP, __VA_ARGS__)
#define LOGSCAN(...) LOGMASKED(LOG_SCAN, __VA_ARGS__)
#define LOGBANK(...) LOGMASKED(LOG_BANK, __VA_ARGS__)
#define LOGSCREEN(...) LOGMASKED(LOG_SCREEN, __VA_ARGS__)
#define LOGR(...) LOGMASKED(LOG_READ, __VA_ARGS__)
#define LOGCS(...) LOGMASKED(LOG_CS, __VA_ARGS__)
#define LOGPLA(...) LOGMASKED(LOG_PLA, __VA_ARGS__)
#define LOGPROM(...) LOGMASKED(LOG_PROM, __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"
/* 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_lines(*this, "LINE%u", 0U)
, m_lines{ 0, 0, 0, 0 }
, m_led(0)
, m_rs232(*this, "rs232")
, m_leds(*this, "led%u", 0U)
{ }
TIMER_DEVICE_CALLBACK_MEMBER(scan_artwork);
protected:
virtual void machine_start() override { m_leds.resolve(); }
required_ioport_array<5> m_io_lines;
uint8_t m_lines[4];
uint8_t m_reset;
uint8_t m_shift;
uint8_t m_led;
optional_device<rs232_port_device> m_rs232;
output_finder<2> m_leds;
};
/* _____________________________________________________________________________________________ ___________________________________________________________________________
* |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)
LOG("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 )
{
LOG("--->%s(%02x) LED is connected through resisitor to +5v so logical 0 will lit it\n", FUNCNAME, state);
m_leds[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));
save_item(NAME(m_led));
}
void md6802_state::machine_reset()
{
LOG("--->%s()\n", FUNCNAME);
m_led = 1;
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.
#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;
};
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;
LOG("--->%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_leds[m_led] = m_shift ? 1 : 0;
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 )
{
for (unsigned i = 0U; 4U > i; ++i)
m_lines[i] = m_io_lines[i]->read();
#if VERBOSE
if (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]);
#endif
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_led));
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);
}
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
// TODO: Fix shift led for mp68a correctly, workaround doesn't work anymore! Shift works though...
TIMER_DEVICE_CALLBACK_MEMBER(didact_state::scan_artwork)
{
// LOG("--->%s()\n", FUNCNAME);
// Poll the artwork Reset key
if (m_io_lines[4]->read() & 0x04)
{
LOG("RESET is pressed, resetting the CPU\n");
m_shift = 0;
m_leds[m_led] = m_shift ? 1 : 0; // For mp68a only
if (m_reset == 0)
{
machine_reset();
}
m_reset = 1; // Inhibit multiple resets
}
else if (m_io_lines[4]->read() & 0x08)
{
// Poll the artwork SHIFT/* key
LOG("%s", !m_shift ? "SHIFT is set\n" : "");
m_shift = 1;
m_leds[m_led] = m_shift ? 1 : 0; // For mp68a only
}
else
{
if (m_reset == 1)
{
m_reset = 0; // Enable reset again
}
}
}
MACHINE_CONFIG_START(md6802_state::md6802)
MCFG_DEVICE_ADD("maincpu", M6802, XTAL(4'000'000))
MCFG_DEVICE_PROGRAM_MAP(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));
MCFG_TIMER_DRIVER_ADD_PERIODIC("artwork_timer", md6802_state, scan_artwork, attotime::from_hz(10))
MCFG_DEVICE_ADD("rs232", RS232_PORT, default_rs232_devices, nullptr)
MACHINE_CONFIG_END
MACHINE_CONFIG_START(mp68a_state::mp68a)
// 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_DEVICE_ADD("maincpu", M6800, 505000)
MCFG_DEVICE_PROGRAM_MAP(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 */
MCFG_DEVICE_ADD("digit0", DM9368, 0)
MCFG_DM9368_UPDATE_CALLBACK(WRITE8(*this, mp68a_state, digit_w<0>))
MCFG_DEVICE_ADD("digit1", DM9368, 0)
MCFG_DM9368_UPDATE_CALLBACK(WRITE8(*this, mp68a_state, digit_w<1>))
MCFG_DEVICE_ADD("digit2", DM9368, 0)
MCFG_DM9368_UPDATE_CALLBACK(WRITE8(*this, mp68a_state, digit_w<2>))
MCFG_DEVICE_ADD("digit3", DM9368, 0)
MCFG_DM9368_UPDATE_CALLBACK(WRITE8(*this, mp68a_state, digit_w<3>))
MCFG_DEVICE_ADD("digit4", DM9368, 0)
MCFG_DM9368_UPDATE_CALLBACK(WRITE8(*this, mp68a_state, digit_w<4>))
MCFG_DEVICE_ADD("digit5", DM9368, 0)
MCFG_DM9368_UPDATE_CALLBACK(WRITE8(*this, mp68a_state, digit_w<5>))
MCFG_TIMER_DRIVER_ADD_PERIODIC("artwork_timer", mp68a_state, scan_artwork, attotime::from_hz(10))
MACHINE_CONFIG_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 )