// license:BSD-3-Clause
// copyright-holders:Miodrag Milanovic, Robbbert
/*********************************************************************************************************************************
Science of Cambridge MK-14
2009-11-20 Skeleton driver.
2016-08-21 Working
Keys:
UP: MEM increments the currently displayed address, (and goes into data entry mode in V1 bios).
= : TERM changes to "data entry" mode. In this mode, entering hex digits will change the byte at the currently displayed address
- : ABORT changes to "address entry" mode. In this mode, entering hex digits will change the address.
X : GO runs the program from the currently displayed address. On exit, the instruction after the program is displayed
Pasting:
0-F : as is
MEM : ^
TERM: =
AB : -
GO : X
Example program: ("organ" from p82 of the manual)
-F20=C4^0D^35^C4^00^31^C4^08^C8^F6^C5^01^E4^FF^98^08^8F^00^06^E4^07^07^90^EB^B8^E6^9C^EE^90^E5^-F20X
Pressing keys will produces different tones.
ToDo:
- VDU optional attachment (we are missing the chargen rom)
- The original version of the bios is missing (we have version 2)
*********************************************************************************************************************************/
#include "emu.h"
#include "cpu/scmp/scmp.h"
#include "imagedev/cassette.h"
#include "machine/ins8154.h"
#include "sound/dac.h"
#include "sound/volt_reg.h"
#include "sound/wave.h"
#include "speaker.h"
#include "mk14.lh"
class mk14_state : public driver_device
{
public:
mk14_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_keyboard(*this, "X.%u", 0)
, m_cass(*this, "cassette")
, m_dac(*this, "dac")
, m_digits(*this, "digit%u", 0U)
{ }
DECLARE_READ8_MEMBER(keyboard_r);
DECLARE_WRITE8_MEMBER(display_w);
DECLARE_WRITE8_MEMBER(port_a_w);
DECLARE_WRITE_LINE_MEMBER(cass_w);
DECLARE_READ_LINE_MEMBER(cass_r);
void mk14(machine_config &config);
void mem_map(address_map &map);
private:
virtual void machine_reset() override;
virtual void machine_start() override;
required_device<cpu_device> m_maincpu;
required_ioport_array<8> m_keyboard;
required_device<cassette_image_device> m_cass;
required_device<dac_bit_interface> m_dac;
output_finder<8> m_digits;
};
/*
000-1FF 512 byte SCIOS ROM Decoded by 0xxx
200-3FF ROM Shadow / Expansion RAM
400-5FF ROM Shadow / Expansion RAM
600-7FF ROM Shadow / Expansion RAM
800-87F I/O Ports Decoded by 1xx0
880-8FF 128 bytes I/O chip RAM Decoded by 1xx0
900-9FF Keyboard & Display Decoded by 1x01
A00-AFF I/O Port & RAM Shadow
B00-BFF 256 bytes RAM (Extended) / VDU RAM Decoded by 1011
C00-CFF I/O Port & RAM Shadow
D00-DFF Keyboard & Display Shadow
E00-EFF I/O Port & RAM Shadow
F00-FFF 256 bytes RAM (Standard) / VDU RAM Decoded by 1111
*/
READ8_MEMBER( mk14_state::keyboard_r )
{
if (offset < 8)
return m_keyboard[offset]->read();
else
return 0xff;
}
WRITE8_MEMBER( mk14_state::display_w )
{
if (offset < 8 )
m_digits[offset] = data;
else
{
//logerror("write %02x to %02x\n",data,offset);
}
}
void mk14_state::mem_map(address_map &map)
{
map.unmap_value_high();
map.global_mask(0x0fff);
map(0x000, 0x1ff).mirror(0x600).rom(); // ROM
map(0x800, 0x87f).mirror(0x600).rw("ic8", FUNC(ins8154_device::ins8154_r), FUNC(ins8154_device::ins8154_w)); // I/O
map(0x880, 0x8ff).mirror(0x600).ram(); // 128 I/O chip RAM
map(0x900, 0x9ff).mirror(0x400).rw(this, FUNC(mk14_state::keyboard_r), FUNC(mk14_state::display_w));
map(0xb00, 0xbff).ram(); // VDU RAM
map(0xf00, 0xfff).ram(); // Standard RAM
}
/* Input ports */
static INPUT_PORTS_START( mk14 )
PORT_START("X.0")
PORT_BIT(0x0F, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("A") PORT_CODE(KEYCODE_A) PORT_CHAR('A')
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("8") PORT_CODE(KEYCODE_8) PORT_CHAR('8')
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("0") PORT_CODE(KEYCODE_0) PORT_CHAR('0')
PORT_START("X.1")
PORT_BIT(0x0F, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("B") PORT_CODE(KEYCODE_B) PORT_CHAR('B')
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("9") PORT_CODE(KEYCODE_9) PORT_CHAR('9')
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("1") PORT_CODE(KEYCODE_1) PORT_CHAR('1')
PORT_START("X.2")
PORT_BIT(0x0F, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("C") PORT_CODE(KEYCODE_C) PORT_CHAR('C')
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("GO") PORT_CODE(KEYCODE_X) PORT_CHAR('X')
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("2") PORT_CODE(KEYCODE_2) PORT_CHAR('2')
PORT_START("X.3")
PORT_BIT(0x0F, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("D") PORT_CODE(KEYCODE_D) PORT_CHAR('D')
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("MEM") PORT_CODE(KEYCODE_UP) PORT_CHAR('^')
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("3") PORT_CODE(KEYCODE_3) PORT_CHAR('3')
PORT_START("X.4")
PORT_BIT(0x0F, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("AB") PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-')
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("4") PORT_CODE(KEYCODE_4) PORT_CHAR('4')
PORT_START("X.5")
PORT_BIT(0x0F, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("5") PORT_CODE(KEYCODE_5) PORT_CHAR('5')
PORT_START("X.6")
PORT_BIT(0x0F, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("E") PORT_CODE(KEYCODE_E) PORT_CHAR('E')
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("6") PORT_CODE(KEYCODE_6) PORT_CHAR('6')
PORT_START("X.7")
PORT_BIT(0x0F, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F") PORT_CODE(KEYCODE_F) PORT_CHAR('F')
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("TERM") PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('=')
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("7") PORT_CODE(KEYCODE_7) PORT_CHAR('7')
INPUT_PORTS_END
WRITE8_MEMBER( mk14_state::port_a_w )
{
}
WRITE_LINE_MEMBER( mk14_state::cass_w )
{
m_cass->output(state ? -1.0 : +1.0);
m_dac->write(state);
}
READ_LINE_MEMBER( mk14_state::cass_r )
{
return (m_cass->input() > 0.03) ? 1 : 0;
}
void mk14_state::machine_reset()
{
}
void mk14_state::machine_start()
{
m_digits.resolve();
}
MACHINE_CONFIG_START(mk14_state::mk14)
/* basic machine hardware */
// IC1 1SP-8A/600 (8060) SC/MP Microprocessor
MCFG_DEVICE_ADD("maincpu", INS8060, XTAL(4'433'619))
MCFG_SCMP_CONFIG(WRITELINE(*this, mk14_state, cass_w), NOOP, READLINE(*this, mk14_state, cass_r), NOOP, READLINE(*this, mk14_state, cass_r), NOOP)
MCFG_DEVICE_PROGRAM_MAP(mem_map)
/* video hardware */
MCFG_DEFAULT_LAYOUT(layout_mk14)
// sound
SPEAKER(config, "speaker").front_center();
WAVE(config, "wave", "cassette").add_route(ALL_OUTPUTS, "speaker", 0.05);
MCFG_DEVICE_ADD("dac", DAC_1BIT, 0) MCFG_SOUND_ROUTE(ALL_OUTPUTS, "speaker", 0.25)
MCFG_DEVICE_ADD("dac8", ZN425E, 0) MCFG_SOUND_ROUTE(ALL_OUTPUTS, "speaker", 0.5) // Ferranti ZN425E
MCFG_DEVICE_ADD("vref", VOLTAGE_REGULATOR, 0) MCFG_VOLTAGE_REGULATOR_OUTPUT(5.0)
MCFG_SOUND_ROUTE(0, "dac", 1.0, DAC_VREF_POS_INPUT)
MCFG_SOUND_ROUTE(0, "dac8", 1.0, DAC_VREF_POS_INPUT) MCFG_SOUND_ROUTE(0, "dac8", -1.0, DAC_VREF_NEG_INPUT)
/* devices */
MCFG_DEVICE_ADD("ic8", INS8154, 0)
MCFG_INS8154_OUT_A_CB(WRITE8(*this, mk14_state, port_a_w))
MCFG_INS8154_OUT_B_CB(WRITE8("dac8", dac_byte_interface, write))
MCFG_CASSETTE_ADD( "cassette" )
MACHINE_CONFIG_END
/* ROM definition */
ROM_START( mk14 )
ROM_REGION( 0x200, "maincpu", 0 )
// IC2,3 74S571 512 x 4 bit ROM
ROM_LOAD( "scios.bin", 0x0000, 0x0200, CRC(8b667daa) SHA1(802dc637ce5391a2a6627f76f919b12a869b56ef)) // V2 bios, V1 is missing
ROM_END
/* Driver */
// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS
COMP( 1977, mk14, 0, 0, mk14, mk14, mk14_state, empty_init, "Science of Cambridge", "MK-14", 0 )