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Diffstat (limited to 'src/mame/drivers/mc1502.c')
-rw-r--r--src/mame/drivers/mc1502.c410
1 files changed, 410 insertions, 0 deletions
diff --git a/src/mame/drivers/mc1502.c b/src/mame/drivers/mc1502.c
new file mode 100644
index 00000000000..12134cbc3ab
--- /dev/null
+++ b/src/mame/drivers/mc1502.c
@@ -0,0 +1,410 @@
+// license:BSD-3-Clause
+// copyright-holders:Sergey Svishchev
+/***************************************************************************
+
+ drivers/mc1502.c
+
+ Driver file for Electronika MC 1502
+
+***************************************************************************/
+
+#include "emu.h"
+#include "includes/mc1502.h"
+#include "bus/rs232/rs232.h"
+
+#include "cpu/i86/i86.h"
+#include "machine/kb_7007_3.h"
+#include "sound/speaker.h"
+#include "sound/wave.h"
+
+#define VERBOSE_DBG 0
+
+#define DBG_LOG(N,M,A) \
+ do { \
+ if(VERBOSE_DBG>=N) \
+ { \
+ if( M ) \
+ logerror("%11.6f: %-24s",machine().time().as_double(),(char*)M ); \
+ logerror A; \
+ } \
+ } while (0)
+
+/*
+ * onboard devices:
+ */
+
+// Timer
+
+/* check if any keys are pressed, raise IRQ1 if so */
+
+TIMER_CALLBACK_MEMBER(mc1502_state::keyb_signal_callback)
+{
+ UINT8 key = 0;
+
+ key |= ioport("Y1")->read();
+ key |= ioport("Y2")->read();
+ key |= ioport("Y3")->read();
+ key |= ioport("Y4")->read();
+ key |= ioport("Y5")->read();
+ key |= ioport("Y6")->read();
+ key |= ioport("Y7")->read();
+ key |= ioport("Y8")->read();
+ key |= ioport("Y9")->read();
+ key |= ioport("Y10")->read();
+ key |= ioport("Y11")->read();
+ key |= ioport("Y12")->read();
+// DBG_LOG(1,"mc1502_k_s_c",("= %02X (%d) %s\n", key, m_kbd.pulsing,
+// (key || m_kbd.pulsing) ? " will IRQ" : ""));
+
+ /*
+ If a key is pressed and we're not pulsing yet, start pulsing the IRQ1;
+ keep pulsing while any key is pressed, and pulse one time after all keys
+ are released.
+ */
+ if (key) {
+ if (m_kbd.pulsing < 2) {
+ m_kbd.pulsing += 2;
+ }
+ }
+
+ if (m_kbd.pulsing) {
+ m_pic8259->ir1_w(m_kbd.pulsing & 1);
+ m_kbd.pulsing--;
+ }
+}
+
+WRITE8_MEMBER(mc1502_state::mc1502_ppi_portb_w)
+{
+// DBG_LOG(2,"mc1502_ppi_portb_w",("( %02X )\n", data));
+ m_ppi_portb = data;
+ m_pit8253->write_gate2(BIT(data, 0));
+ mc1502_speaker_set_spkrdata(BIT(data, 1));
+ m_centronics->write_strobe(BIT(data, 2));
+ m_centronics->write_autofd(BIT(data, 3));
+ m_centronics->write_init(BIT(data, 4));
+}
+
+// bit 0: parallel port data transfer direction (default = 0 = out)
+// bits 1-2: CGA_FONT (default = 01)
+// bit 3: i8251 SYNDET pin triggers NMI (default = 1 = no)
+WRITE8_MEMBER(mc1502_state::mc1502_ppi_portc_w)
+{
+// DBG_LOG(2,"mc1502_ppi_portc_w",("( %02X )\n", data));
+ m_ppi_portc = data & 15;
+}
+
+// 0x80 -- serial RxD
+// 0x40 -- CASS IN, also loops back T2OUT (gated by CASWR)
+// 0x20 -- T2OUT
+// 0x10 -- SNDOUT
+READ8_MEMBER(mc1502_state::mc1502_ppi_portc_r)
+{
+ int data = 0xff;
+ double tap_val = m_cassette->input();
+
+ data = ( data & ~0x40 ) | ( tap_val < 0 ? 0x40 : 0x00 ) | ( (BIT(m_ppi_portb, 7) && m_pit_out2) ? 0x40 : 0x00 );
+ data = ( data & ~0x20 ) | ( m_pit_out2 ? 0x20 : 0x00 );
+ data = ( data & ~0x10 ) | ( (BIT(m_ppi_portb, 1) && m_pit_out2) ? 0x10 : 0x00 );
+
+// DBG_LOG(2,"mc1502_ppi_portc_r",("= %02X (tap_val %f t2out %d) at %s\n",
+// data, tap_val, m_pit_out2, machine().describe_context()));
+ return data;
+}
+
+READ8_MEMBER(mc1502_state::mc1502_kppi_porta_r)
+{
+ UINT8 key = 0;
+
+ if (m_kbd.mask & 0x0001) { key |= ioport("Y1")->read(); }
+ if (m_kbd.mask & 0x0002) { key |= ioport("Y2")->read(); }
+ if (m_kbd.mask & 0x0004) { key |= ioport("Y3")->read(); }
+ if (m_kbd.mask & 0x0008) { key |= ioport("Y4")->read(); }
+ if (m_kbd.mask & 0x0010) { key |= ioport("Y5")->read(); }
+ if (m_kbd.mask & 0x0020) { key |= ioport("Y6")->read(); }
+ if (m_kbd.mask & 0x0040) { key |= ioport("Y7")->read(); }
+ if (m_kbd.mask & 0x0080) { key |= ioport("Y8")->read(); }
+ if (m_kbd.mask & 0x0100) { key |= ioport("Y9")->read(); }
+ if (m_kbd.mask & 0x0200) { key |= ioport("Y10")->read(); }
+ if (m_kbd.mask & 0x0400) { key |= ioport("Y11")->read(); }
+ if (m_kbd.mask & 0x0800) { key |= ioport("Y12")->read(); }
+ key ^= 0xff;
+// DBG_LOG(2,"mc1502_kppi_porta_r",("= %02X\n", key));
+ return key;
+}
+
+WRITE8_MEMBER(mc1502_state::mc1502_kppi_portb_w)
+{
+ m_kbd.mask &= ~255;
+ m_kbd.mask |= data ^ 255;
+ if (!BIT(data, 0))
+ m_kbd.mask |= 1 << 11;
+ else
+ m_kbd.mask &= ~(1 << 11);
+// DBG_LOG(2,"mc1502_kppi_portb_w",("( %02X -> %04X )\n", data, m_kbd.mask));
+}
+
+WRITE8_MEMBER(mc1502_state::mc1502_kppi_portc_w)
+{
+ m_kbd.mask &= ~(7 << 8);
+ m_kbd.mask |= ((data ^ 7) & 7) << 8;
+// DBG_LOG(2,"mc1502_kppi_portc_w",("( %02X -> %04X )\n", data, m_kbd.mask));
+}
+
+WRITE_LINE_MEMBER(mc1502_state::mc1502_i8251_syndet)
+{
+ if (!BIT(m_ppi_portc,3))
+ m_maincpu->set_input_line(INPUT_LINE_NMI, state ? ASSERT_LINE : CLEAR_LINE);
+}
+
+WRITE_LINE_MEMBER(mc1502_state::mc1502_pit8253_out1_changed)
+{
+ m_upd8251->write_txc(state);
+ m_upd8251->write_rxc(state);
+}
+
+WRITE_LINE_MEMBER(mc1502_state::mc1502_pit8253_out2_changed)
+{
+ m_pit_out2 = state;
+ m_speaker->level_w(m_spkrdata & m_pit_out2);
+ m_cassette->output(state ? 1 : -1);
+}
+
+WRITE_LINE_MEMBER(mc1502_state::mc1502_speaker_set_spkrdata)
+{
+ m_spkrdata = state ? 1 : 0;
+ m_speaker->level_w(m_spkrdata & m_pit_out2);
+}
+
+DRIVER_INIT_MEMBER( mc1502_state, mc1502 )
+{
+ address_space &program = m_maincpu->space(AS_PROGRAM);
+
+ DBG_LOG(0,"init",("driver_init()\n"));
+
+ program.unmap_readwrite(0, 0x7ffff);
+ program.install_readwrite_bank(0, m_ram->size()-1, "bank10");
+ membank( "bank10" )->set_base( m_ram->pointer() );
+}
+
+MACHINE_START_MEMBER( mc1502_state, mc1502 )
+{
+ DBG_LOG(0,"init",("machine_start()\n"));
+
+ /*
+ Keyboard polling circuit holds IRQ1 high until a key is
+ pressed, then it starts a timer that pulses IRQ1 low each
+ 40ms (check) for 20ms (check) until all keys are released.
+ Last pulse causes BIOS to write a 'break' scancode into port 60h.
+ */
+ m_pic8259->ir1_w(1);
+ memset(&m_kbd, 0, sizeof(m_kbd));
+ m_kbd.keyb_signal_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(mc1502_state::keyb_signal_callback),this));
+ m_kbd.keyb_signal_timer->adjust( attotime::from_msec(20), 0, attotime::from_msec(20) );
+}
+
+MACHINE_RESET_MEMBER( mc1502_state, mc1502 )
+{
+ DBG_LOG(0,"init",("machine_reset()\n"));
+
+ m_spkrdata = 0;
+ m_pit_out2 = 1;
+ m_ppi_portb = 0;
+ m_ppi_portc = 0;
+ m_speaker->level_w(0);
+}
+
+/*
+ * macros
+ */
+
+static ADDRESS_MAP_START( mc1502_map, AS_PROGRAM, 8, mc1502_state )
+ ADDRESS_MAP_UNMAP_HIGH
+ AM_RANGE(0x00000, 0x97fff) AM_RAM /* 96K on mainboard + 512K on extension card */
+ AM_RANGE(0xc0000, 0xfbfff) AM_NOP
+ AM_RANGE(0xfc000, 0xfffff) AM_ROM
+ADDRESS_MAP_END
+
+static ADDRESS_MAP_START( pk88_map, AS_PROGRAM, 8, mc1502_state )
+ ADDRESS_MAP_UNMAP_HIGH
+ AM_RANGE(0x00000, 0x1ffff) AM_RAMBANK("bank10") /* 96K on mainboard */
+ AM_RANGE(0xf0000, 0xf7fff) AM_ROM /* BASIC */
+ AM_RANGE(0xfc000, 0xfffff) AM_ROM
+ADDRESS_MAP_END
+
+static ADDRESS_MAP_START(mc1502_io, AS_IO, 8, mc1502_state )
+ AM_RANGE(0x0020, 0x0021) AM_DEVREADWRITE("pic8259", pic8259_device, read, write)
+ AM_RANGE(0x0028, 0x0028) AM_DEVREADWRITE("upd8251", i8251_device, data_r, data_w)
+ AM_RANGE(0x0029, 0x0029) AM_DEVREADWRITE("upd8251", i8251_device, status_r, control_w)
+ AM_RANGE(0x0040, 0x0043) AM_DEVREADWRITE("pit8253", pit8253_device, read, write)
+ AM_RANGE(0x0060, 0x0063) AM_DEVREADWRITE("ppi8255n1", i8255_device, read, write)
+ AM_RANGE(0x0068, 0x006B) AM_DEVREADWRITE("ppi8255n2", i8255_device, read, write) // keyboard poll
+ADDRESS_MAP_END
+
+static INPUT_PORTS_START( mc1502 )
+ PORT_INCLUDE( mc7007_3_keyboard )
+INPUT_PORTS_END
+
+static MACHINE_CONFIG_START( mc1502, mc1502_state )
+ MCFG_CPU_ADD("maincpu", I8088, XTAL_16MHz/3)
+ MCFG_CPU_PROGRAM_MAP(mc1502_map)
+ MCFG_CPU_IO_MAP(mc1502_io)
+ MCFG_CPU_IRQ_ACKNOWLEDGE_DEVICE("pic8259", pic8259_device, inta_cb)
+
+ MCFG_MACHINE_START_OVERRIDE( mc1502_state, mc1502 )
+ MCFG_MACHINE_RESET_OVERRIDE( mc1502_state, mc1502 )
+
+ MCFG_DEVICE_ADD("pit8253", PIT8253, 0)
+ MCFG_PIT8253_CLK0(XTAL_16MHz/12) /* heartbeat IRQ */
+ MCFG_PIT8253_OUT0_HANDLER(DEVWRITELINE("pic8259", pic8259_device, ir0_w))
+ MCFG_PIT8253_CLK1(XTAL_16MHz/12) /* serial port */
+ MCFG_PIT8253_OUT1_HANDLER(WRITELINE(mc1502_state, mc1502_pit8253_out1_changed))
+ MCFG_PIT8253_CLK2(XTAL_16MHz/12) /* pio port c pin 4, and speaker polling enough */
+ MCFG_PIT8253_OUT2_HANDLER(WRITELINE(mc1502_state, mc1502_pit8253_out2_changed))
+
+ MCFG_PIC8259_ADD( "pic8259", INPUTLINE("maincpu", 0), VCC, NULL )
+
+ MCFG_DEVICE_ADD("ppi8255n1", I8255, 0)
+ MCFG_I8255_OUT_PORTA_CB(DEVWRITE8("cent_data_out", output_latch_device, write))
+ MCFG_I8255_OUT_PORTB_CB(WRITE8(mc1502_state, mc1502_ppi_portb_w))
+ MCFG_I8255_IN_PORTC_CB(READ8(mc1502_state, mc1502_ppi_portc_r))
+ MCFG_I8255_OUT_PORTC_CB(WRITE8(mc1502_state, mc1502_ppi_portc_w))
+
+ MCFG_DEVICE_ADD("ppi8255n2", I8255, 0)
+ MCFG_I8255_IN_PORTA_CB(READ8(mc1502_state, mc1502_kppi_porta_r))
+ MCFG_I8255_OUT_PORTB_CB(WRITE8(mc1502_state, mc1502_kppi_portb_w))
+ MCFG_I8255_IN_PORTC_CB(DEVREAD8("cent_status_in", input_buffer_device, read))
+ MCFG_I8255_OUT_PORTC_CB(WRITE8(mc1502_state, mc1502_kppi_portc_w))
+
+ MCFG_DEVICE_ADD( "upd8251", I8251, 0)
+ MCFG_I8251_TXD_HANDLER(DEVWRITELINE("irps", rs232_port_device, write_txd))
+ MCFG_I8251_DTR_HANDLER(DEVWRITELINE("irps", rs232_port_device, write_dtr))
+ MCFG_I8251_RTS_HANDLER(DEVWRITELINE("irps", rs232_port_device, write_rts))
+ /* XXX RxD data are accessible via PPI port C, bit 7 */
+ MCFG_I8251_RXRDY_HANDLER(DEVWRITELINE("pic8259", pic8259_device, ir7_w)) /* default handler does nothing */
+ MCFG_I8251_TXRDY_HANDLER(DEVWRITELINE("pic8259", pic8259_device, ir7_w))
+ MCFG_I8251_SYNDET_HANDLER(WRITELINE(mc1502_state, mc1502_i8251_syndet))
+
+ MCFG_RS232_PORT_ADD("irps", default_rs232_devices, NULL)
+ MCFG_RS232_RXD_HANDLER(DEVWRITELINE("upd8251", i8251_device, write_rxd))
+ MCFG_RS232_DSR_HANDLER(DEVWRITELINE("upd8251", i8251_device, write_dsr))
+
+ MCFG_DEVICE_ADD("isa", ISA8, 0)
+ MCFG_ISA8_CPU(":maincpu")
+ MCFG_ISA_OUT_IRQ2_CB(DEVWRITELINE("pic8259", pic8259_device, ir2_w))
+ MCFG_ISA_OUT_IRQ3_CB(DEVWRITELINE("pic8259", pic8259_device, ir3_w))
+ MCFG_ISA_OUT_IRQ4_CB(DEVWRITELINE("pic8259", pic8259_device, ir4_w))
+ MCFG_ISA_OUT_IRQ5_CB(DEVWRITELINE("pic8259", pic8259_device, ir5_w))
+ MCFG_ISA_OUT_IRQ6_CB(DEVWRITELINE("pic8259", pic8259_device, ir6_w))
+ MCFG_ISA_OUT_IRQ7_CB(DEVWRITELINE("pic8259", pic8259_device, ir7_w))
+
+ MCFG_ISA8_SLOT_ADD("isa", "board0", mc1502_isa8_cards, "cga_mc1502", true)
+ MCFG_ISA8_SLOT_ADD("isa", "isa1", mc1502_isa8_cards, "fdc", false)
+ MCFG_ISA8_SLOT_ADD("isa", "isa2", mc1502_isa8_cards, "rom", false)
+
+ MCFG_SPEAKER_STANDARD_MONO("mono")
+ MCFG_SOUND_WAVE_ADD(WAVE_TAG, "cassette")
+ MCFG_SOUND_ADD("speaker", SPEAKER_SOUND, 0)
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.80)
+
+ MCFG_CENTRONICS_ADD("centronics", centronics_devices, "printer")
+ MCFG_CENTRONICS_ACK_HANDLER(DEVWRITELINE("cent_status_in", input_buffer_device, write_bit6))
+ MCFG_CENTRONICS_BUSY_HANDLER(DEVWRITELINE("cent_status_in", input_buffer_device, write_bit7))
+ MCFG_CENTRONICS_FAULT_HANDLER(DEVWRITELINE("cent_status_in", input_buffer_device, write_bit4))
+ MCFG_CENTRONICS_PERROR_HANDLER(DEVWRITELINE("cent_status_in", input_buffer_device, write_bit5))
+
+ MCFG_DEVICE_ADD("cent_status_in", INPUT_BUFFER, 0)
+
+ MCFG_CENTRONICS_OUTPUT_LATCH_ADD("cent_data_out", "centronics")
+
+ MCFG_CASSETTE_ADD( "cassette" )
+ MCFG_CASSETTE_DEFAULT_STATE(CASSETTE_STOPPED | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_ENABLED)
+
+ MCFG_SOFTWARE_LIST_ADD("flop_list","mc1502_flop")
+// MCFG_SOFTWARE_LIST_ADD("cass_list","mc1502_cass")
+
+ MCFG_RAM_ADD(RAM_TAG)
+ MCFG_RAM_DEFAULT_SIZE("608K") /* 96 base + 512 on expansion card */
+ MCFG_RAM_EXTRA_OPTIONS("96K")
+MACHINE_CONFIG_END
+
+static MACHINE_CONFIG_DERIVED( pk88, mc1502 )
+ MCFG_CPU_MODIFY("maincpu")
+ MCFG_CPU_PROGRAM_MAP(pk88_map)
+MACHINE_CONFIG_END
+
+
+/*
+ Apparently there was a hardware revision with built-in floppy
+ controller mapped to alternate set of ports; v531 and v533
+ support this revision. v533 is possibly not an original BIOS, it
+ supports autoboot which none of others do. v521h is a version
+ with support for 3rd party hard disk controller (not emulated).
+ v51 is designed for a different keyboard layout (JCUKEN, not
+ QWERTY).
+*/
+ROM_START( mc1502 )
+ ROM_REGION16_LE(0x100000,"maincpu", 0)
+
+ ROM_DEFAULT_BIOS("v52")
+ ROM_SYSTEM_BIOS(0, "v50", "v5.0 10/05/89")
+ ROMX_LOAD( "monitor_5_0.rom", 0xfc000, 0x4000, CRC(9e97c6a0) SHA1(16a304e8de69ec4d8b92acda6bf28454c361a24f),ROM_BIOS(1))
+ ROM_SYSTEM_BIOS(1, "v52", "v5.2 22/03/91")
+ ROMX_LOAD( "monitor_5_2.rom", 0xfc000, 0x4000, CRC(0e65491e) SHA1(8a4d556473b5e0e59b05fab77c79c29f4d562412),ROM_BIOS(2))
+ ROM_SYSTEM_BIOS(2, "v521", "v5.21 12/10/92")
+ ROMX_LOAD( "monitor_5_21.rom", 0xfc000, 0x4000, CRC(28c8f653) SHA1(04b0b09e0b86d9648a83352cc1590eb8963833e0),ROM_BIOS(3))
+ ROM_SYSTEM_BIOS(3, "v531", "v5.31 12/10/92")
+ ROMX_LOAD( "monitor_5_31.rom", 0xfc000, 0x4000, CRC(a48295d5) SHA1(6f38977c22f9cc6c2bc6f6e53edc4048ca6b6721),ROM_BIOS(4))
+ ROM_SYSTEM_BIOS(4, "v533", "v5.33 01/08/93")
+ ROMX_LOAD( "0_(cbc0).bin", 0xfc000, 0x2000, CRC(9a55bc4f) SHA1(81da44eec2e52cf04b1fc7053502270f51270590),ROM_BIOS(5))
+ ROMX_LOAD( "1_(dfe2).bin", 0xfe000, 0x2000, CRC(8dec077a) SHA1(d6f6d7cc2183abc77fbd9cd59132de5766f7c458),ROM_BIOS(5))
+
+ // 5.21 + 3rd party HDC support. fails checksum test so marked BAD_DUMP.
+ ROM_SYSTEM_BIOS(5, "v521h", "v5.21h 22/09/93")
+ ROMX_LOAD( "mshbios0.pgm", 0xfc000, 0x2000, BAD_DUMP CRC(be447261) SHA1(b93c597c17dfa4b678f72c20a3f7119b73e6ba1c),ROM_BIOS(6))
+ ROMX_LOAD( "mshbios1.pgm", 0xfe000, 0x2000, BAD_DUMP CRC(89e2eaf2) SHA1(37d6b225b5e35574fdac81219589407d925225be),ROM_BIOS(6))
+
+ // 5.3
+ ROM_SYSTEM_BIOS(6, "v53", "v5.3 10/11/91")
+ ROMX_LOAD( "1502~3b0.pgm", 0xfc000, 0x2000, CRC(dc148763) SHA1(7a5e66438007b2de328ac680614f9c4ff60f6a75),ROM_BIOS(7))
+ ROMX_LOAD( "1502~3b1.pgm", 0xfe000, 0x2000, CRC(17fc2af2) SHA1(a060d7b7302dfa639025f025106b50412cf26953),ROM_BIOS(7))
+ // 5.1 -- JCUKEN keyboard
+ ROM_SYSTEM_BIOS(7, "v51", "v5.1 10/12/90")
+ ROMX_LOAD( "ms1502b0.pgm", 0xfc000, 0x2000, CRC(92fcc29a) SHA1(930a4cffcd6ec6110dd9a18bd389b78f0ccb110a),ROM_BIOS(8))
+ ROMX_LOAD( "ms1502b1.pgm", 0xfe000, 0x2000, CRC(fe355a58) SHA1(b4ef7775045c6f2095e2b487fe19824986a4892c),ROM_BIOS(8))
+ // 5.31
+ ROM_SYSTEM_BIOS(8, "v531_92", "v5.31 12/10/92")
+ ROMX_LOAD( "ms531b0.pgm", 0xfc000, 0x2000, CRC(d97157d1) SHA1(cb1a1e0e2d9a0fcc78f9b09bfb4814d408ee4fae),ROM_BIOS(9))
+ ROMX_LOAD( "ms531b1.pgm", 0xfe000, 0x2000, CRC(b1368e1a) SHA1(286496d25dc0ac2d8fe1802caffc6c37b236d105),ROM_BIOS(9))
+ // 5.2
+ ROM_SYSTEM_BIOS(9, "v52_91", "v5.2 10/11/91")
+ ROMX_LOAD( "msv5~2b0.pgm", 0xfc000, 0x2000, CRC(f7f370e9) SHA1(e069a35005581a02856853b57dd511ab8e10054b),ROM_BIOS(10))
+ ROMX_LOAD( "msv5~2b1.pgm", 0xfe000, 0x2000, CRC(d50e1c43) SHA1(22724dec0052ee9e52f44f5914f2f5f3fae14612),ROM_BIOS(10))
+
+ ROM_REGION(0x2000,"gfx1", ROMREGION_ERASE00)
+ ROM_LOAD( "symgen.rom", 0x0000, 0x2000, CRC(b2747a52) SHA1(6766d275467672436e91ac2997ac6b77700eba1e))
+ROM_END
+
+/*
+ Predecessor of MC1502, same keyboard attachment but
+ different video subsystem (not emulated).
+*/
+ROM_START( pk88 )
+ ROM_REGION16_LE(0x100000,"maincpu", 0)
+
+ ROM_LOAD( "b0.064", 0xf0000, 0x2000, CRC(80d3cf5d) SHA1(64769b7a8b60ffeefa04e4afbec778069a2840c9))
+ ROM_LOAD( "b1.064", 0xf2000, 0x2000, CRC(673a4acc) SHA1(082ae803994048e225150f771794ca305f73d731))
+ ROM_LOAD( "b2.064", 0xf4000, 0x2000, CRC(1ee66152) SHA1(7ed8c4c6c582487e802beabeca5b86702e5083e8))
+ ROM_LOAD( "b3.064", 0xf6000, 0x2000, CRC(3062b3fc) SHA1(5134dd64721cbf093d059ee5d3fd09c7f86604c7))
+ ROM_LOAD( "pk88-0.064", 0xfc000, 0x2000, CRC(1e4666cf) SHA1(6364c5241f2792909ff318194161eb2c29737546))
+ ROM_LOAD( "pk88-1.064", 0xfe000, 0x2000, CRC(6fa7e7ef) SHA1(d68bc273baa46ba733ac6ad4df7569dd70cf60dd))
+ROM_END
+
+/***************************************************************************
+
+ Game driver(s)
+
+***************************************************************************/
+
+/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME */
+COMP ( 1989, mc1502, ibm5150, 0, mc1502, mc1502, mc1502_state, mc1502, "NPO Microprocessor", "Elektronika MC-1502", 0)
+COMP ( 1988, pk88, ibm5150, 0, pk88, mc1502, mc1502_state, mc1502, "NPO Microprocessor", "Elektronika PK-88", MACHINE_NOT_WORKING | MACHINE_NO_SOUND)