/***************************************************************************
Elektor Junior
17/07/2009 Skeleton driver.
This is heavily based on the KIM-1, the keycodes and operation being
identical.
Pasting:
0-F : as is
+ (inc) : ^
AD : -
DA : =
GO : X
(note: DA only works when addressing RAM)
Test Paste:
=11^22^33^44^55^66^77^88^99^-0000
Now press up-arrow to confirm the data has been entered.
****************************************************************************/
#include "emu.h"
#include "cpu/m6502/m6502.h"
#include "machine/6532riot.h"
#include "junior.lh"
class junior_state : public driver_device
{
public:
junior_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag),
m_riot(*this, "riot")
,
m_maincpu(*this, "maincpu") { }
required_device<riot6532_device> m_riot;
DECLARE_READ8_MEMBER(junior_riot_a_r);
DECLARE_READ8_MEMBER(junior_riot_b_r);
DECLARE_WRITE8_MEMBER(junior_riot_a_w);
DECLARE_WRITE8_MEMBER(junior_riot_b_w);
DECLARE_WRITE_LINE_MEMBER(junior_riot_irq);
UINT8 m_port_a;
UINT8 m_port_b;
UINT8 m_led_time[6];
virtual void machine_start();
virtual void machine_reset();
DECLARE_INPUT_CHANGED_MEMBER(junior_reset);
TIMER_DEVICE_CALLBACK_MEMBER(junior_update_leds);
required_device<cpu_device> m_maincpu;
};
static ADDRESS_MAP_START(junior_mem, AS_PROGRAM, 8, junior_state)
ADDRESS_MAP_GLOBAL_MASK(0x1FFF)
ADDRESS_MAP_UNMAP_HIGH
AM_RANGE(0x0000, 0x03ff) AM_RAM // 1K RAM
AM_RANGE(0x1a00, 0x1a7f) AM_RAM // 6532 RAM
AM_RANGE(0x1a80, 0x1aff) AM_DEVREADWRITE("riot", riot6532_device, read, write)
AM_RANGE(0x1c00, 0x1fff) AM_ROM // Monitor
ADDRESS_MAP_END
INPUT_CHANGED_MEMBER(junior_state::junior_reset)
{
if (newval == 0)
m_maincpu->reset();
}
/* Input ports */
static INPUT_PORTS_START( junior )
PORT_START("LINE0") /* IN0 keys row 0 */
PORT_BIT( 0x80, 0x00, IPT_UNUSED )
PORT_BIT( 0x40, 0x40, IPT_KEYBOARD ) PORT_NAME("0") PORT_CODE(KEYCODE_0) PORT_CHAR('0')
PORT_BIT( 0x20, 0x20, IPT_KEYBOARD ) PORT_NAME("1") PORT_CODE(KEYCODE_1) PORT_CHAR('1')
PORT_BIT( 0x10, 0x10, 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( 0x04, 0x04, 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( 0x01, 0x01, IPT_KEYBOARD ) PORT_NAME("6") PORT_CODE(KEYCODE_6) PORT_CHAR('6')
PORT_START("LINE1") /* IN1 keys row 1 */
PORT_BIT( 0x80, 0x00, IPT_UNUSED )
PORT_BIT( 0x40, 0x40, IPT_KEYBOARD ) PORT_NAME("7") PORT_CODE(KEYCODE_7) PORT_CHAR('7')
PORT_BIT( 0x20, 0x20, IPT_KEYBOARD ) PORT_NAME("8") PORT_CODE(KEYCODE_8) PORT_CHAR('8')
PORT_BIT( 0x10, 0x10, IPT_KEYBOARD ) PORT_NAME("9") PORT_CODE(KEYCODE_9) PORT_CHAR('9')
PORT_BIT( 0x08, 0x08, IPT_KEYBOARD ) PORT_NAME("A") PORT_CODE(KEYCODE_A) PORT_CHAR('A')
PORT_BIT( 0x04, 0x04, IPT_KEYBOARD ) PORT_NAME("B") PORT_CODE(KEYCODE_B) PORT_CHAR('B')
PORT_BIT( 0x02, 0x02, IPT_KEYBOARD ) PORT_NAME("C") PORT_CODE(KEYCODE_C) PORT_CHAR('C')
PORT_BIT( 0x01, 0x01, IPT_KEYBOARD ) PORT_NAME("D") PORT_CODE(KEYCODE_D) PORT_CHAR('D')
PORT_START("LINE2") /* IN2 keys row 2 */
PORT_BIT( 0x80, 0x00, IPT_UNUSED )
PORT_BIT( 0x40, 0x40, IPT_KEYBOARD ) PORT_NAME("E") PORT_CODE(KEYCODE_E) PORT_CHAR('E')
PORT_BIT( 0x20, 0x20, IPT_KEYBOARD ) PORT_NAME("F") PORT_CODE(KEYCODE_F) PORT_CHAR('F')
PORT_BIT( 0x10, 0x10, IPT_KEYBOARD ) PORT_NAME("AD") PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-')
PORT_BIT( 0x08, 0x08, IPT_KEYBOARD ) PORT_NAME("DA") PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('=')
PORT_BIT( 0x04, 0x04, IPT_KEYBOARD ) PORT_NAME("+") PORT_CODE(KEYCODE_UP) PORT_CHAR('^')
PORT_BIT( 0x02, 0x02, IPT_KEYBOARD ) PORT_NAME("GO") PORT_CODE(KEYCODE_X) PORT_CHAR('X')
PORT_BIT( 0x01, 0x01, IPT_KEYBOARD ) PORT_NAME("PC") PORT_CODE(KEYCODE_F6)
PORT_START("LINE3") /* IN3 STEP and RESET keys, MODE switch */
PORT_BIT( 0x80, 0x00, IPT_UNUSED )
PORT_BIT( 0x40, 0x40, IPT_KEYBOARD ) PORT_NAME("sw1: ST") PORT_CODE(KEYCODE_F7)
PORT_BIT( 0x20, 0x20, IPT_KEYBOARD ) PORT_NAME("sw2: RST") PORT_CODE(KEYCODE_F3) PORT_CHANGED_MEMBER(DEVICE_SELF, junior_state, junior_reset, NULL)
PORT_DIPNAME(0x10, 0x10, "sw3: SS (NumLock)") PORT_CODE(KEYCODE_NUMLOCK) PORT_TOGGLE
PORT_DIPSETTING( 0x00, "single step")
PORT_DIPSETTING( 0x10, "run")
PORT_BIT( 0x08, 0x00, IPT_UNUSED )
PORT_BIT( 0x04, 0x00, IPT_UNUSED )
PORT_BIT( 0x02, 0x00, IPT_UNUSED )
PORT_BIT( 0x01, 0x00, IPT_UNUSED )
INPUT_PORTS_END
READ8_MEMBER( junior_state::junior_riot_a_r )
{
UINT8 data = 0xff;
switch( ( m_port_b >> 1 ) & 0x0f )
{
case 0:
data = ioport("LINE0")->read();
break;
case 1:
data = ioport("LINE1")->read();
break;
case 2:
data = ioport("LINE2")->read();
break;
}
return data;
}
READ8_MEMBER( junior_state::junior_riot_b_r )
{
if ( m_riot->portb_out_get() & 0x20 )
return 0xFF;
return 0x7F;
}
WRITE8_MEMBER( junior_state::junior_riot_a_w )
{
UINT8 idx = ( m_port_b >> 1 ) & 0x0f;
m_port_a = data;
if ((idx >= 4 && idx < 10) & ( m_port_a != 0xff ))
{
output_set_digit_value( idx-4, m_port_a ^ 0x7f );
m_led_time[idx - 4] = 10;
}
}
WRITE8_MEMBER( junior_state::junior_riot_b_w )
{
UINT8 idx = ( data >> 1 ) & 0x0f;
m_port_b = data;
if ((idx >= 4 && idx < 10) & ( m_port_a != 0xff ))
{
output_set_digit_value( idx-4, m_port_a ^ 0x7f );
m_led_time[idx - 4] = 10;
}
}
WRITE_LINE_MEMBER( junior_state::junior_riot_irq )
{
m_maincpu->set_input_line(M6502_IRQ_LINE, state ? HOLD_LINE : CLEAR_LINE);
}
TIMER_DEVICE_CALLBACK_MEMBER(junior_state::junior_update_leds)
{
int i;
for ( i = 0; i < 6; i++ )
{
if ( m_led_time[i] )
m_led_time[i]--;
else
output_set_digit_value( i, 0 );
}
}
void junior_state::machine_start()
{
save_item(NAME(m_port_a));
save_item(NAME(m_port_b));
}
void junior_state::machine_reset()
{
int i;
for ( i = 0; i < 6; i++ )
m_led_time[i] = 0;
}
static MACHINE_CONFIG_START( junior, junior_state )
/* basic machine hardware */
MCFG_CPU_ADD("maincpu",M6502, XTAL_1MHz)
MCFG_CPU_PROGRAM_MAP(junior_mem)
MCFG_QUANTUM_TIME(attotime::from_hz(50))
/* video hardware */
MCFG_DEFAULT_LAYOUT( layout_junior )
/* Devices */
MCFG_DEVICE_ADD("riot", RIOT6532, XTAL_1MHz)
MCFG_RIOT6532_IN_PA_CB(READ8(junior_state, junior_riot_a_r))
MCFG_RIOT6532_OUT_PA_CB(WRITE8(junior_state, junior_riot_a_w))
MCFG_RIOT6532_IN_PB_CB(READ8(junior_state, junior_riot_b_r))
MCFG_RIOT6532_OUT_PB_CB(WRITE8(junior_state, junior_riot_b_w))
MCFG_RIOT6532_IRQ_CB(WRITELINE(junior_state, junior_riot_irq))
MCFG_TIMER_DRIVER_ADD_PERIODIC("led_timer", junior_state, junior_update_leds, attotime::from_hz(50))
MACHINE_CONFIG_END
/* ROM definition */
ROM_START( junior )
ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
ROM_DEFAULT_BIOS("orig")
ROM_SYSTEM_BIOS( 0, "orig", "Original ESS503" )
ROMX_LOAD( "ess503.ic2", 0x1c00, 0x0400, CRC(9e804f8c) SHA1(181bdb69fb4711cb008e7966747d4775a5e3ef69), ROM_BIOS(1))
ROM_SYSTEM_BIOS( 1, "mod-orig", "Mod-Original (2708)" )
ROMX_LOAD( "junior-mod.ic2", 0x1c00, 0x0400, CRC(ee8aa69d) SHA1(a132a51603f1a841c354815e6d868b335ac84364), ROM_BIOS(2))
ROM_SYSTEM_BIOS( 2, "2732", "Just monitor (2732)" )
ROMX_LOAD( "junior27321a.ic2", 0x1c00, 0x0400, CRC(e22f24cc) SHA1(a6edb52a9eea5e99624c128065e748e5a3fb2e4c), ROM_BIOS(3))
ROM_END
/* Driver */
/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */
COMP( 1980, junior, 0, 0, junior, junior, driver_device, 0, "Elektor Electronics", "Junior Computer", GAME_SUPPORTS_SAVE | GAME_NO_SOUND_HW)