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-rw-r--r--src/mess/drivers/tec1.c463
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diff --git a/src/mess/drivers/tec1.c b/src/mess/drivers/tec1.c
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-// license:BSD-3-Clause
-// copyright-holders:Robbbert
-/***************************************************************************
-
- TEC-1 driver, written by Robbbert in April, 2009 for MESS.
-
-The TEC-1 was a single-board "computer" described in Talking Electronics
-magazine, issues number 10 and 11. Talking Electronics do not have dates on
-their issues, so the date is uncertain, although 1984 seems a reasonable
-guess. Talking Electronics operated from Cheltenham, a suburb of Melbourne.
-
-The hardware is quite simple, consisting of a Z80 cpu, 2x 8212 8-bit latch,
-74C923 keyboard scanner, 20 push-button keys, 6-digit LED display, a speaker,
-a 2k EPROM and sundry parts.
-
-The cpu speed could be adjusted by using a potentiometer, the range being
-250 kHz to 2MHz. This is a simple method of adjusting a game's difficulty.
-
-We emulate the original version. Later enhancements included more RAM, speech
-synthesis and various attachments, however I have no information on these.
-
-Pasting:
- 0-F : as is
- + (inc) : ^
- - (dec) : V
- AD : -
- GO : X
-
-Keys:
-0 to 9, A to F are on the key of the same name.
-AD (input an address) is the '-' key.
-+ and - (increment / decrement address) are the up and down-arrow keys.
-GO (execute program at current address) is the X key.
-SHIFT - later monitor versions utilised an extra shift button. Hold
- it down and press another key (use Left Shift).
-
-Whenever a program listing mentions RESET, do a Soft Reset.
-
-Each key causes a beep to be heard. You may need to press more than once
-to get it to register.
-
-Inbuilt games - press the following sequence of keys:
-- Welcome: RESET D 1 + 0 2 AD 0 2 7 0 GO GO (Paste: D1^02 -0270XX)
-- Nim: RESET AD 3 E 0 GO GO (Paste: -3E0XX)
-- Invaders: RESET AD 3 2 0 GO GO (Paste: -320XX)
-- Luna Lander: RESET AD 4 9 0 GO GO (Paste: -490XX)
-
-Thanks to Chris Schwartz who dumped his ROM for me way back in the old days.
-It's only taken 25 years to get around to emulating it...
-
-
-Differences between tec1 and tecjmon:
-
-On the tec1 a keypress is indicated by an NMI from the 74C923; but on
-the jmon it sets bit 6 of port 3 low instead. The NMI code is simply
-a 'retn' in the jmon rom, so we can use the same code.
-The jmon includes a cassette interface, a serial input connection,
-and an optional LCD, but the games of the tec1 have been removed.
-
-
-ToDo:
-- After a Soft Reset, pressing keys can crash the emulation.
-- The 74C923 code may need to be revisited to improve keyboard response.
- Sometimes have to press a key a few times before it registers.
-- The 10ms debounce is not emulated.
-
-
-JMON ToDo:
-- Add LCD display (2 rows by 16 characters)
-
-
-***************************************************************************/
-
-#include "emu.h"
-#include "cpu/z80/z80.h"
-#include "sound/speaker.h"
-#include "sound/wave.h"
-#include "imagedev/cassette.h"
-#include "tec1.lh"
-
-
-class tec1_state : public driver_device
-{
-public:
- tec1_state(const machine_config &mconfig, device_type type, const char *tag)
- : driver_device(mconfig, type, tag),
- m_maincpu(*this, "maincpu"),
- m_speaker(*this, "speaker"),
- m_cass(*this, "cassette"),
- m_wave(*this, WAVE_TAG),
- m_key_pressed(0),
- m_io_line0(*this, "LINE0"),
- m_io_line1(*this, "LINE1"),
- m_io_line2(*this, "LINE2"),
- m_io_line3(*this, "LINE3"),
- m_io_shift(*this, "SHIFT")
- { }
-
- required_device<cpu_device> m_maincpu;
- required_device<speaker_sound_device> m_speaker;
- optional_device<cassette_image_device> m_cass;
- optional_device<wave_device> m_wave;
- bool m_key_pressed;
- required_ioport m_io_line0;
- required_ioport m_io_line1;
- required_ioport m_io_line2;
- required_ioport m_io_line3;
- required_ioport m_io_shift;
- emu_timer *m_kbd_timer;
- DECLARE_READ8_MEMBER( tec1_kbd_r );
- DECLARE_READ8_MEMBER( latch_r );
- DECLARE_WRITE8_MEMBER( tec1_digit_w );
- DECLARE_WRITE8_MEMBER( tecjmon_digit_w );
- DECLARE_WRITE8_MEMBER( tec1_segment_w );
- UINT8 m_kbd;
- UINT8 m_segment;
- UINT8 m_digit;
- UINT8 m_kbd_row;
- UINT8 m_refresh[6];
- UINT8 tec1_convert_col_to_bin( UINT8 col, UINT8 row );
- virtual void machine_reset();
- virtual void machine_start();
- TIMER_CALLBACK_MEMBER(tec1_kbd_callback);
-};
-
-
-
-
-/***************************************************************************
-
- Display
-
-***************************************************************************/
-
-WRITE8_MEMBER( tec1_state::tec1_segment_w )
-{
-/* d7 segment d
- d6 segment e
- d5 segment c
- d4 segment dot
- d3 segment b
- d2 segment g
- d1 segment f
- d0 segment a */
-
- m_segment = BITSWAP8(data, 4, 2, 1, 6, 7, 5, 3, 0);
-}
-
-WRITE8_MEMBER( tec1_state::tec1_digit_w )
-{
-/* d7 speaker
- d6 not used
- d5 data digit 1
- d4 data digit 2
- d3 address digit 1
- d2 address digit 2
- d1 address digit 3
- d0 address digit 4 */
-
- m_speaker->level_w(BIT(data, 7));
-
- m_digit = data & 0x3f;
-}
-
-WRITE8_MEMBER( tec1_state::tecjmon_digit_w )
-{
-/* d7 speaker & cassout
- d6 not used
- d5 data digit 1
- d4 data digit 2
- d3 address digit 1
- d2 address digit 2
- d1 address digit 3
- d0 address digit 4 */
-
- m_speaker->level_w(BIT(data, 7));
- m_cass->output(BIT(data, 7) ? -1.0 : +1.0);
- m_digit = data & 0x3f;
-}
-
-
-/***************************************************************************
-
- Keyboard
-
-***************************************************************************/
-
-READ8_MEMBER( tec1_state::latch_r )
-{
-// bit 7 - cass in ; bit 6 low = key pressed
- UINT8 data = (m_key_pressed) ? 0 : 0x40;
-
- if (m_cass->input() > 0.03)
- data |= 0x80;
-
- return data;
-}
-
-
-READ8_MEMBER( tec1_state::tec1_kbd_r )
-{
- m_maincpu->set_input_line(INPUT_LINE_NMI, CLEAR_LINE);
- return m_kbd | m_io_shift->read();
-}
-
-UINT8 tec1_state::tec1_convert_col_to_bin( UINT8 col, UINT8 row )
-{
- UINT8 data = row;
-
- if (BIT(col, 1))
- data |= 4;
- else
- if (BIT(col, 2))
- data |= 8;
- else
- if (BIT(col, 3))
- data |= 12;
- else
- if (BIT(col, 4))
- data |= 16;
-
- return data;
-}
-
-TIMER_CALLBACK_MEMBER(tec1_state::tec1_kbd_callback)
-{
- UINT8 i;
-
- // Display the digits. Blank any digits that haven't been refreshed for a while.
- // This will fix the problem reported by a user.
- for (i = 0; i < 6; i++)
- {
- if (BIT(m_digit, i))
- {
- m_refresh[i] = 1;
- output_set_digit_value(i, m_segment);
- }
- else
- if (m_refresh[i] == 0x80)
- {
- output_set_digit_value(i, 0);
- m_refresh[i] = 0;
- }
- else
- if (m_refresh[i])
- m_refresh[i]++;
- }
-
- // 74C923 4 by 5 key encoder.
-
- /* Look at old row */
- if (m_kbd_row == 0)
- i = m_io_line0->read();
- else
- if (m_kbd_row == 1)
- i = m_io_line1->read();
- else
- if (m_kbd_row == 2)
- i = m_io_line2->read();
- else
- if (m_kbd_row == 3)
- i = m_io_line3->read();
-
- /* if previous key is still held, bail out */
- if (i)
- if (tec1_convert_col_to_bin(i, m_kbd_row) == m_kbd)
- return;
-
- m_kbd_row++;
- m_kbd_row &= 3;
-
- /* Look at a new row */
- if (m_kbd_row == 0)
- i = m_io_line0->read();
- else
- if (m_kbd_row == 1)
- i = m_io_line1->read();
- else
- if (m_kbd_row == 2)
- i = m_io_line2->read();
- else
- if (m_kbd_row == 3)
- i = m_io_line3->read();
-
- /* see if a key pressed */
- if (i)
- {
- m_kbd = tec1_convert_col_to_bin(i, m_kbd_row);
- m_maincpu->set_input_line(INPUT_LINE_NMI, HOLD_LINE);
- m_key_pressed = TRUE;
- }
- else
- m_key_pressed = FALSE;
-}
-
-
-/***************************************************************************
-
- Machine
-
-***************************************************************************/
-
-void tec1_state::machine_start()
-{
- m_kbd_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(tec1_state::tec1_kbd_callback),this));
- m_kbd_timer->adjust( attotime::zero, 0, attotime::from_hz(500) );
-}
-
-void tec1_state::machine_reset()
-{
- m_kbd = 0;
-}
-
-
-
-/***************************************************************************
-
- Address Map
-
-***************************************************************************/
-
-static ADDRESS_MAP_START( tec1_map, AS_PROGRAM, 8, tec1_state )
- ADDRESS_MAP_GLOBAL_MASK(0x3fff)
- AM_RANGE(0x0000, 0x07ff) AM_ROM
- AM_RANGE(0x0800, 0x0fff) AM_RAM // on main board
- AM_RANGE(0x1000, 0x3fff) AM_RAM // expansion
-ADDRESS_MAP_END
-
-static ADDRESS_MAP_START( tec1_io, AS_IO, 8, tec1_state )
- ADDRESS_MAP_GLOBAL_MASK(0x07)
- AM_RANGE(0x00, 0x00) AM_READ(tec1_kbd_r)
- AM_RANGE(0x01, 0x01) AM_WRITE(tec1_digit_w)
- AM_RANGE(0x02, 0x02) AM_WRITE(tec1_segment_w)
-ADDRESS_MAP_END
-
-
-static ADDRESS_MAP_START( tecjmon_map, AS_PROGRAM, 8, tec1_state )
- ADDRESS_MAP_GLOBAL_MASK(0x3fff)
- AM_RANGE(0x0000, 0x07ff) AM_ROM
- AM_RANGE(0x0800, 0x37ff) AM_RAM
- AM_RANGE(0x3800, 0x3fff) AM_ROM
-ADDRESS_MAP_END
-
-static ADDRESS_MAP_START( tecjmon_io, AS_IO, 8, tec1_state )
- ADDRESS_MAP_GLOBAL_MASK(0xff)
- AM_RANGE(0x00, 0x00) AM_READ(tec1_kbd_r)
- AM_RANGE(0x01, 0x01) AM_WRITE(tecjmon_digit_w)
- AM_RANGE(0x02, 0x02) AM_WRITE(tec1_segment_w)
- AM_RANGE(0x03, 0x03) AM_READ(latch_r)
- //AM_RANGE(0x04, 0x04) AM_WRITE(lcd_en_w)
- //AM_RANGE(0x84, 0x84) AM_WRITE(lcd_2nd_w)
-ADDRESS_MAP_END
-
-
-/**************************************************************************
-
- Keyboard Layout
-
-***************************************************************************/
-
-static INPUT_PORTS_START( tec1 )
- PORT_START("LINE0") /* KEY ROW 0 */
- 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("4") PORT_CODE(KEYCODE_4) PORT_CHAR('4')
- PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("8") PORT_CODE(KEYCODE_8) PORT_CHAR('8')
- PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("C") PORT_CODE(KEYCODE_C) PORT_CHAR('C')
- PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("+") PORT_CODE(KEYCODE_UP) PORT_CHAR('^')
-
- PORT_START("LINE1") /* KEY ROW 1 */
- PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("1") PORT_CODE(KEYCODE_1) PORT_CHAR('1')
- PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("5") PORT_CODE(KEYCODE_5) PORT_CHAR('5')
- PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("9") PORT_CODE(KEYCODE_9) PORT_CHAR('9')
- PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("D") PORT_CODE(KEYCODE_D) PORT_CHAR('D')
- PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("-") PORT_CODE(KEYCODE_DOWN) PORT_CHAR('V')
-
- PORT_START("LINE2") /* KEY ROW 2 */
- PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("2") PORT_CODE(KEYCODE_2) PORT_CHAR('2')
- PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("6") PORT_CODE(KEYCODE_6) PORT_CHAR('6')
- 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("E") PORT_CODE(KEYCODE_E) PORT_CHAR('E')
- PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("GO") PORT_CODE(KEYCODE_X) PORT_CHAR('X')
-
- PORT_START("LINE3") /* KEY ROW 3 */
- PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("3") PORT_CODE(KEYCODE_3) PORT_CHAR('3')
- PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("7") PORT_CODE(KEYCODE_7) PORT_CHAR('7')
- PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("B") PORT_CODE(KEYCODE_B) PORT_CHAR('B')
- PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("F") PORT_CODE(KEYCODE_F) PORT_CHAR('F')
- PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("AD") PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-')
-
- PORT_START("SHIFT")
- PORT_BIT(0x1f, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Shift") PORT_CODE(KEYCODE_LSHIFT)
- PORT_BIT(0xc0, IP_ACTIVE_LOW, IPT_UNUSED)
-INPUT_PORTS_END
-
-
-/***************************************************************************
-
- Machine driver
-
-***************************************************************************/
-
-static MACHINE_CONFIG_START( tec1, tec1_state )
- /* basic machine hardware */
- MCFG_CPU_ADD("maincpu", Z80, 1000000) /* speed can be varied between 250kHz and 2MHz */
- MCFG_CPU_PROGRAM_MAP(tec1_map)
- MCFG_CPU_IO_MAP(tec1_io)
-
- /* video hardware */
- MCFG_DEFAULT_LAYOUT(layout_tec1)
-
- /* sound hardware */
- MCFG_SPEAKER_STANDARD_MONO("mono")
- MCFG_SOUND_ADD("speaker", SPEAKER_SOUND, 0)
- MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
-MACHINE_CONFIG_END
-
-static MACHINE_CONFIG_START( tecjmon, tec1_state )
- /* basic machine hardware */
- MCFG_CPU_ADD("maincpu", Z80, XTAL_3_579545MHz / 2)
- MCFG_CPU_PROGRAM_MAP(tecjmon_map)
- MCFG_CPU_IO_MAP(tecjmon_io)
-
- /* video hardware */
- MCFG_DEFAULT_LAYOUT(layout_tec1)
-
- /* sound hardware */
- MCFG_SPEAKER_STANDARD_MONO("mono")
- MCFG_SOUND_ADD("speaker", SPEAKER_SOUND, 0)
- MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
- MCFG_SOUND_WAVE_ADD(WAVE_TAG, "cassette")
- MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)
-
- /* Devices */
- MCFG_CASSETTE_ADD( "cassette" )
-MACHINE_CONFIG_END
-
-
-/***************************************************************************
-
- Game driver
-
-***************************************************************************/
-
-ROM_START(tec1)
- ROM_REGION(0x10000, "maincpu", ROMREGION_ERASEFF)
- ROM_SYSTEM_BIOS(0, "mon1", "MON1")
- ROMX_LOAD("mon1.rom", 0x0000, 0x0800, CRC(b3390c36) SHA1(18aabc68d473206b7fc4e365c6b57a4e218482c3), ROM_BIOS(1))
- ROM_SYSTEM_BIOS(1, "mon1b", "MON1B")
- ROMX_LOAD("mon1b.rom", 0x0000, 0x0800, CRC(60daea3c) SHA1(383b7e7f02e91fb18c87eb03c5949e31156771d4), ROM_BIOS(2))
- ROM_SYSTEM_BIOS(2, "mon2", "MON2")
- ROMX_LOAD("mon2.rom", 0x0000, 0x0800, CRC(082fd7e7) SHA1(7659add30ca22b15a03d1cbac0892a5c25e47ecd), ROM_BIOS(3))
-ROM_END
-
-ROM_START(tecjmon)
- ROM_REGION(0x10000, "maincpu", ROMREGION_ERASEFF)
- ROM_LOAD("jmon.rom", 0x0000, 0x0800, CRC(202c47a2) SHA1(701588ec5640d633d90d94b2ccd6f65422e19a70) )
- ROM_LOAD("util.rom", 0x3800, 0x0800, CRC(7c19700d) SHA1(dc5b3ade66bb11c54430056966ed99cdd299d82b) )
-ROM_END
-
-/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME */
-COMP( 1984, tec1, 0, 0, tec1, tec1, driver_device, 0, "Talking Electronics magazine", "TEC-1" , 0 )
-COMP( 1984, tecjmon, tec1, 0, tecjmon, tec1, driver_device, 0, "Talking Electronics magazine", "TEC-1A with JMON" , 0 )