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elekscmp.cpp
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elekscmp.cpp
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// license:BSD-3-Clause
// copyright-holders:Miodrag Milanovic, Robbbert
/***************************************************************************
Elektor SC/MP
2009-11-22 Skeleton driver.
2012-05-10 Added keyboard [Robbbert]
2019-07-12 Added cassette [Robbbert]
To Use:
- Press MINUS to enter data input mode
- Press UP or DOWN to cycle through addresses
Paste test:
paste this in: -0F0011^22^33^44^55^66^77^88^99^N-0F00
Now press UP to verify the data that was entered.
It seems the only way to exit each mode is to press NRST.
ToDo:
****************************************************************************/
#include "emu.h"
#include "cpu/scmp/scmp.h"
#include "imagedev/cassette.h"
#include "machine/timer.h"
#include "speaker.h"
#include "elekscmp.lh"
namespace {
class elekscmp_state : public driver_device
{
public:
elekscmp_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_cass(*this, "cassette")
, m_io_keyboard(*this, "X%u", 0U)
, m_digit(*this, "digit%u", 0U)
{ }
void elekscmp(machine_config &config);
DECLARE_INPUT_CHANGED_MEMBER(reset_button);
private:
virtual void machine_start() override;
u8 keyboard_r();
void hex_display_w(offs_t offset, u8 data);
int cass_r();
TIMER_DEVICE_CALLBACK_MEMBER(kansas_r);
TIMER_DEVICE_CALLBACK_MEMBER(kansas_w);
u8 convert_key(u8 data);
bool m_cassinbit = 0, m_cassoutbit = 0, m_cassold = 0;
u8 m_cass_data[4]{};
void mem_map(address_map &map);
required_device<scmp_device> m_maincpu;
required_device<cassette_image_device> m_cass;
required_ioport_array<3> m_io_keyboard;
output_finder<8> m_digit;
};
void elekscmp_state::machine_start()
{
m_digit.resolve();
save_item(NAME(m_cassinbit));
save_item(NAME(m_cassoutbit));
save_item(NAME(m_cassold));
save_item(NAME(m_cass_data));
}
void elekscmp_state::hex_display_w(offs_t offset, u8 data)
{
m_digit[offset & 0x7] = data;
}
u8 elekscmp_state::convert_key(u8 data)
{
for (u8 i = 0; i < 8; i++)
if (BIT(data, i))
return i;
return 0xff;
}
u8 elekscmp_state::keyboard_r()
{
u8 data = m_io_keyboard[0]->read();
if (data)
return 0x80 | convert_key(data);
data = m_io_keyboard[1]->read();
if (data)
return 0x88 | convert_key(data);
data = m_io_keyboard[2]->read();
if (data)
return 0x80 | (convert_key(data) << 4);
return 0;
}
TIMER_DEVICE_CALLBACK_MEMBER( elekscmp_state::kansas_r )
{
// no tape - set uart to idle
m_cass_data[1]++;
if (m_cass_data[1] > 32)
{
m_cass_data[1] = 32;
m_cassinbit = 1;
}
/* cassette - turn 1200/2400Hz to a bit */
u8 cass_ws = (m_cass->input() > +0.04) ? 1 : 0;
if (cass_ws != m_cass_data[0])
{
m_cass_data[0] = cass_ws;
m_cassinbit = (m_cass_data[1] < 12) ? 1 : 0;
m_cass_data[1] = 0;
}
}
TIMER_DEVICE_CALLBACK_MEMBER( elekscmp_state::kansas_w )
{
u8 twobit = m_cass_data[3] & 7;
m_cass_data[3]++;
if (twobit == 0)
m_cassold = m_cassoutbit;
if (m_cassold)
m_cass->output(BIT(m_cass_data[3], 0) ? -1.0 : +1.0); // 2400Hz
else
m_cass->output(BIT(m_cass_data[3], 1) ? -1.0 : +1.0); // 1200Hz
}
int elekscmp_state::cass_r()
{
return m_cassinbit;
}
void elekscmp_state::mem_map(address_map &map)
{
map.unmap_value_high();
map.global_mask(0x0fff);
map(0x000, 0x5ff).rom(); // ROM
map(0x700, 0x707).w(FUNC(elekscmp_state::hex_display_w));
map(0x708, 0x70f).r(FUNC(elekscmp_state::keyboard_r));
map(0x800, 0xfff).ram(); // RAM - up to 2K of RAM
}
/* Input ports */
static INPUT_PORTS_START( elekscmp )
PORT_START("X0")
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(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_START("X1")
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(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_START("X2")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Up") PORT_CODE(KEYCODE_UP) PORT_CHAR('^')
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Down") PORT_CODE(KEYCODE_DOWN) PORT_CHAR('V')
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("CPU Reg") PORT_CODE(KEYCODE_Q) PORT_CHAR('Q')
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Block Transfer") PORT_CODE(KEYCODE_W) PORT_CHAR('W')
PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Cassette") PORT_CODE(KEYCODE_R) PORT_CHAR('R')
PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Subtract") PORT_CODE(KEYCODE_T) PORT_CHAR('T')
PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Modify") PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-')
PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Run") PORT_CODE(KEYCODE_ENTER) PORT_CHAR('X')
PORT_START("RESET")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("NRST") PORT_CODE(KEYCODE_F1) PORT_CHANGED_MEMBER(DEVICE_SELF, elekscmp_state, reset_button, 0) PORT_CHAR('N')
INPUT_PORTS_END
INPUT_CHANGED_MEMBER(elekscmp_state::reset_button)
{
m_maincpu->set_input_line(INPUT_LINE_RESET, newval ? ASSERT_LINE : CLEAR_LINE);
}
void elekscmp_state::elekscmp(machine_config &config)
{
/* basic machine hardware */
INS8060(config, m_maincpu, XTAL(1'000'000));
m_maincpu->set_addrmap(AS_PROGRAM, &elekscmp_state::mem_map);
m_maincpu->s_out().set([this] (bool state) { m_cassoutbit = state; });
m_maincpu->s_in().set(FUNC(elekscmp_state::cass_r));
/* video hardware */
config.set_default_layout(layout_elekscmp);
SPEAKER(config, "mono").front_center();
CASSETTE(config, m_cass);
m_cass->set_default_state(CASSETTE_STOPPED | CASSETTE_SPEAKER_ENABLED | CASSETTE_MOTOR_ENABLED);
m_cass->add_route(ALL_OUTPUTS, "mono", 0.05);
TIMER(config, "kansas_w").configure_periodic(FUNC(elekscmp_state::kansas_w), attotime::from_hz(4800));
TIMER(config, "kansas_r").configure_periodic(FUNC(elekscmp_state::kansas_r), attotime::from_hz(40000));
}
/* ROM definition */
ROM_START( elekscmp )
ROM_REGION( 0x0600, "maincpu", 0 )
ROM_LOAD( "elbug.001", 0x0000, 0x0200, CRC(f733da28) SHA1(b65d98be03eab80478167964beec26bb327bfdf3))
ROM_LOAD( "elbug.002", 0x0200, 0x0200, CRC(529c0b88) SHA1(bd72dd890cd974e1744ca70aa3457657374cbf76))
ROM_LOAD( "elbug.003", 0x0400, 0x0200, CRC(13585ad1) SHA1(93f722b3e84095a1b701b04bf9018c891933b9ff))
ROM_END
} // anonymous namespace
/* Driver */
/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */
COMP( 1977, elekscmp, 0, 0, elekscmp, elekscmp, elekscmp_state, empty_init, "Elektor", "Elektor SC/MP", MACHINE_SUPPORTS_SAVE )