// license:BSD-3-Clause
// copyright-holders:hap
/******************************************************************************
AVR-Max Chess Computer, aka "SHAH"
In Germany it was named AVR-Max-Schachzwerg
The chess engine is H.G. Muller's micro-Max 4.8, ATMega88 port and prototype
hardware design by Andre Adrian. PCB finalization by Elektor, published in
Elektor magazine in 2009.
FN 1 = new game, FN 2 = set level, FN 3 = principle variation.
Moves are confirmed by pressing GO twice.
Hardware notes:
- PCB label 081101-1 (c)Elektor v1.4
- Atmel ATMega88P-20PU @ ~8MHz, 8KB internal ROM
- 4-digit 7seg display, button panel, no sound
TODO:
- AVR8 SLEEP opcode is not working, it's used for power-saving here and was
harmless to hack out, but needs to be put back when it's emulated
- add Elektor CC2 version with custom LCD screen
******************************************************************************/
#include "emu.h"
#include "cpu/avr8/avr8.h"
#include "video/pwm.h"
// internal artwork
#include "avrmax.lh" // clickable
namespace {
class avrmax_state : public driver_device
{
public:
avrmax_state(const machine_config &mconfig, device_type type, const char *tag) :
driver_device(mconfig, type, tag),
m_maincpu(*this, "maincpu"),
m_display(*this, "display"),
m_inputs(*this, "IN.%u", 0)
{ }
void avrmax(machine_config &config);
protected:
virtual void machine_start() override;
private:
// devices/pointers
required_device<avr8_device> m_maincpu;
required_device<pwm_display_device> m_display;
required_ioport_array<4> m_inputs;
// address maps
void main_map(address_map &map);
void data_map(address_map &map);
void io_map(address_map &map);
// I/O handlers
void update_display();
void mux_w(u8 data);
void led_w(u8 data);
u8 input_r();
u8 m_inp_mux = 0;
u8 m_7seg_data = 0;
};
void avrmax_state::machine_start()
{
// register for savestates
save_item(NAME(m_inp_mux));
save_item(NAME(m_7seg_data));
}
/******************************************************************************
I/O
******************************************************************************/
void avrmax_state::update_display()
{
m_display->matrix(m_inp_mux, m_7seg_data);
}
void avrmax_state::mux_w(u8 data)
{
// PC0-PC3: input mux/digit select
m_inp_mux = ~data & 0xf;
update_display();
}
void avrmax_state::led_w(u8 data)
{
// PD0-PD7: 7seg data
m_7seg_data = ~data;
update_display();
}
u8 avrmax_state::input_r()
{
u8 data = 0;
// PB0-PB2: multiplexed inputs
for (int i = 0; i < 4; i++)
if (BIT(m_inp_mux, i))
data |= m_inputs[i]->read();
return ~data & 7;
}
/******************************************************************************
Address Maps
******************************************************************************/
void avrmax_state::main_map(address_map &map)
{
map(0x0000, 0x1fff).rom();
}
void avrmax_state::data_map(address_map &map)
{
map(0x0100, 0x04ff).ram();
}
void avrmax_state::io_map(address_map &map)
{
map(AVR8_IO_PORTB, AVR8_IO_PORTB).r(FUNC(avrmax_state::input_r));
map(AVR8_IO_PORTC, AVR8_IO_PORTC).w(FUNC(avrmax_state::mux_w));
map(AVR8_IO_PORTD, AVR8_IO_PORTD).w(FUNC(avrmax_state::led_w));
}
/******************************************************************************
Input Ports
******************************************************************************/
static INPUT_PORTS_START( avrmax )
PORT_START("IN.0")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("A1") PORT_CODE(KEYCODE_A) PORT_CODE(KEYCODE_1) PORT_CODE(KEYCODE_1_PAD)
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("E5") PORT_CODE(KEYCODE_E) PORT_CODE(KEYCODE_5) PORT_CODE(KEYCODE_5_PAD)
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("FN") PORT_CODE(KEYCODE_N)
PORT_START("IN.1")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("B2") PORT_CODE(KEYCODE_B) PORT_CODE(KEYCODE_2) PORT_CODE(KEYCODE_2_PAD)
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("F6") PORT_CODE(KEYCODE_F) PORT_CODE(KEYCODE_6) PORT_CODE(KEYCODE_6_PAD)
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("CL") PORT_CODE(KEYCODE_DEL) PORT_CODE(KEYCODE_BACKSPACE)
PORT_START("IN.2")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("C3") PORT_CODE(KEYCODE_C) PORT_CODE(KEYCODE_3) PORT_CODE(KEYCODE_3_PAD)
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("G7") PORT_CODE(KEYCODE_G) PORT_CODE(KEYCODE_7) PORT_CODE(KEYCODE_7_PAD)
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("GO") PORT_CODE(KEYCODE_ENTER) PORT_CODE(KEYCODE_ENTER_PAD)
PORT_START("IN.3")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("D4") PORT_CODE(KEYCODE_D) PORT_CODE(KEYCODE_4) PORT_CODE(KEYCODE_4_PAD)
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYPAD) PORT_NAME("H8") PORT_CODE(KEYCODE_H) PORT_CODE(KEYCODE_8) PORT_CODE(KEYCODE_8_PAD)
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_UNUSED)
INPUT_PORTS_END
/******************************************************************************
Machine Configs
******************************************************************************/
void avrmax_state::avrmax(machine_config &config)
{
/* basic machine hardware */
ATMEGA88(config, m_maincpu, 8000000); // internal R/C clock
m_maincpu->set_addrmap(AS_PROGRAM, &avrmax_state::main_map);
m_maincpu->set_addrmap(AS_DATA, &avrmax_state::data_map);
m_maincpu->set_addrmap(AS_IO, &avrmax_state::io_map);
m_maincpu->set_eeprom_tag("eeprom");
/* video hardware */
PWM_DISPLAY(config, m_display).set_size(4, 8);
m_display->set_segmask(0xf, 0xff);
config.set_default_layout(layout_avrmax);
}
/******************************************************************************
ROM Definitions
******************************************************************************/
ROM_START( avrmax )
ROM_REGION( 0x2000, "maincpu", 0 )
ROM_LOAD( "elektor_081101-41.ic1", 0x0000, 0x2000, CRC(86d2a654) SHA1(3c235b8f6f735eaf408f54cbf44872166e7161d5) )
// HACK: changed SLEEP to NOP
ROM_FILL( 0x025c, 2, 0x00 )
ROM_FILL( 0x0f8e, 2, 0x00 )
ROM_FILL( 0x0fde, 2, 0x00 )
ROM_FILL( 0x1020, 2, 0x00 )
ROM_FILL( 0x1060, 2, 0x00 )
ROM_FILL( 0x129a, 2, 0x00 )
ROM_REGION( 0x200, "eeprom", ROMREGION_ERASE00 )
ROM_END
ROM_START( avrmaxg )
ROM_REGION( 0x2000, "maincpu", 0 )
ROM_LOAD( "elektor_081101-41_d.ic1", 0x0000, 0x2000, CRC(18ec7a56) SHA1(a018421aa0ad8cce3d852f7519dec3691f3c55a0) )
// HACK: changed SLEEP to NOP
ROM_FILL( 0x025c, 2, 0x00 )
ROM_FILL( 0x0f8e, 2, 0x00 )
ROM_FILL( 0x0fde, 2, 0x00 )
ROM_FILL( 0x1020, 2, 0x00 )
ROM_FILL( 0x1060, 2, 0x00 )
ROM_FILL( 0x129a, 2, 0x00 )
ROM_REGION( 0x200, "eeprom", ROMREGION_ERASE00 )
ROM_END
} // anonymous namespace
/******************************************************************************
Drivers
******************************************************************************/
// YEAR NAME PARENT CMP MACHINE INPUT STATE INIT COMPANY, FULLNAME, FLAGS
CONS( 2009, avrmax, 0, 0, avrmax, avrmax, avrmax_state, empty_init, "Elektor", "AVR-Max Chess Computer (English)", MACHINE_SUPPORTS_SAVE | MACHINE_CLICKABLE_ARTWORK | MACHINE_NO_SOUND_HW )
CONS( 2009, avrmaxg, avrmax, 0, avrmax, avrmax, avrmax_state, empty_init, "Elektor", "AVR-Max-Schachzwerg (German)", MACHINE_SUPPORTS_SAVE | MACHINE_CLICKABLE_ARTWORK | MACHINE_NO_SOUND_HW ) // German 'text'