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-rw-r--r--src/mess/drivers/px4.c1461
1 files changed, 1461 insertions, 0 deletions
diff --git a/src/mess/drivers/px4.c b/src/mess/drivers/px4.c
new file mode 100644
index 00000000000..3b83ff1e279
--- /dev/null
+++ b/src/mess/drivers/px4.c
@@ -0,0 +1,1461 @@
+/***************************************************************************
+
+ Epson PX-4
+
+ Note: We are missing a dump of the slave 7508 CPU that controls
+ the keyboard and some other things.
+
+***************************************************************************/
+
+#include "emu.h"
+#include "cpu/z80/z80.h"
+#include "machine/ram.h"
+#include "machine/ctronics.h"
+#include "imagedev/cartslot.h"
+#include "imagedev/cassette.h"
+#include "machine/tf20.h"
+#include "machine/ram.h"
+#include "machine/nvram.h"
+#include "px4.lh"
+
+
+/***************************************************************************
+ CONSTANTS
+***************************************************************************/
+
+#define VERBOSE 0
+
+/* interrupt sources */
+#define INT0_7508 0x01
+#define INT1_ART 0x02
+#define INT2_ICF 0x04
+#define INT3_OVF 0x08
+#define INT4_EXT 0x10
+
+/* 7508 interrupt sources */
+#define UPD7508_INT_ALARM 0x02
+#define UPD7508_INT_POWER_FAIL 0x04
+#define UPD7508_INT_7508_RESET 0x08
+#define UPD7508_INT_Z80_RESET 0x10
+#define UPD7508_INT_ONE_SECOND 0x20
+
+/* art (asynchronous receiver transmitter) */
+#define ART_TXRDY 0x01 /* output buffer empty */
+#define ART_RXRDY 0x02 /* data byte received */
+#define ART_TXEMPTY 0x04 /* transmit buffer empty */
+#define ART_PE 0x08 /* parity error */
+#define ART_OE 0x10 /* overrun error */
+#define ART_FE 0x20 /* framing error */
+
+/* art baud rates */
+static const int transmit_rate[] = { 2112, 1536, 768, 384, 192, 96, 48, 24, 192, 3072, 12, 6, 1152 };
+static const int receive_rate[] = { 2112, 1536, 768, 384, 192, 96, 48, 24, 3072, 192, 12, 6, 1152 };
+
+
+/***************************************************************************
+ MACROS
+***************************************************************************/
+
+#define ART_TX_ENABLED (BIT(m_artcr, 0))
+#define ART_RX_ENABLED (BIT(px4->m_artcr, 2))
+
+#define ART_DATA (BIT(px4->m_artmr, 2)) /* number of data bits, 7 or 8 */
+#define ART_PEN (BIT(px4->m_artmr, 4)) /* parity enabled */
+#define ART_EVEN (BIT(px4->m_artmr, 5)) /* even or odd parity */
+#define ART_STOP (BIT(px4->m_artmr, 7)) /* number of stop bits, 1 or 2 */
+
+
+/***************************************************************************
+ TYPE DEFINITIONS
+***************************************************************************/
+
+class px4_state : public driver_device
+{
+public:
+ px4_state(const machine_config &mconfig, device_type type, const char *tag)
+ : driver_device(mconfig, type, tag) { }
+
+ /* internal ram */
+ ram_device *m_ram;
+
+ /* gapnit register */
+ UINT8 m_ctrl1;
+ UINT16 m_icrb;
+ UINT8 m_bankr;
+ UINT8 m_isr;
+ UINT8 m_ier;
+ UINT8 m_str;
+ UINT8 m_sior;
+
+ /* gapnit internal */
+ UINT16 m_frc_value;
+ UINT16 m_frc_latch;
+
+ /* gapndi register */
+ UINT8 m_vadr;
+ UINT8 m_yoff;
+
+ /* gapnio */
+ emu_timer *m_receive_timer;
+ emu_timer *m_transmit_timer;
+ UINT8 m_artdir;
+ UINT8 m_artdor;
+ UINT8 m_artsr;
+ UINT8 m_artmr;
+ UINT8 m_artcr;
+ UINT8 m_swr;
+
+ /* 7508 internal */
+ int m_one_sec_int_enabled;
+ int m_alarm_int_enabled;
+ int m_key_int_enabled;
+
+ UINT8 m_key_status;
+ UINT8 m_interrupt_status;
+
+ /* centronics printer */
+ centronics_device *m_centronics;
+
+ /* external ramdisk */
+ offs_t m_ramdisk_address;
+ UINT8 *m_ramdisk;
+
+ /* external cassette/barcode reader */
+ cassette_image_device *m_ext_cas;
+ emu_timer *m_ext_cas_timer;
+ int m_ear_last_state;
+
+ /* external devices */
+ device_t *m_sio_device;
+ device_t *m_rs232c_device;
+ DECLARE_READ8_MEMBER(px4_icrlc_r);
+ DECLARE_WRITE8_MEMBER(px4_ctrl1_w);
+ DECLARE_READ8_MEMBER(px4_icrhc_r);
+ DECLARE_WRITE8_MEMBER(px4_cmdr_w);
+ DECLARE_READ8_MEMBER(px4_icrlb_r);
+ DECLARE_WRITE8_MEMBER(px4_ctrl2_w);
+ DECLARE_READ8_MEMBER(px4_icrhb_r);
+ DECLARE_READ8_MEMBER(px4_isr_r);
+ DECLARE_WRITE8_MEMBER(px4_ier_w);
+ DECLARE_READ8_MEMBER(px4_str_r);
+ DECLARE_WRITE8_MEMBER(px4_bankr_w);
+ DECLARE_READ8_MEMBER(px4_sior_r);
+ DECLARE_WRITE8_MEMBER(px4_sior_w);
+ DECLARE_WRITE8_MEMBER(px4_vadr_w);
+ DECLARE_WRITE8_MEMBER(px4_yoff_w);
+ DECLARE_WRITE8_MEMBER(px4_fr_w);
+ DECLARE_WRITE8_MEMBER(px4_spur_w);
+ DECLARE_READ8_MEMBER(px4_ctgif_r);
+ DECLARE_WRITE8_MEMBER(px4_ctgif_w);
+ DECLARE_READ8_MEMBER(px4_artdir_r);
+ DECLARE_WRITE8_MEMBER(px4_artdor_w);
+ DECLARE_READ8_MEMBER(px4_artsr_r);
+ DECLARE_WRITE8_MEMBER(px4_artmr_w);
+ DECLARE_READ8_MEMBER(px4_iostr_r);
+ DECLARE_WRITE8_MEMBER(px4_artcr_w);
+ DECLARE_WRITE8_MEMBER(px4_swr_w);
+ DECLARE_WRITE8_MEMBER(px4_ioctlr_w);
+ DECLARE_WRITE8_MEMBER(px4_ramdisk_address_w);
+ DECLARE_READ8_MEMBER(px4_ramdisk_data_r);
+ DECLARE_WRITE8_MEMBER(px4_ramdisk_data_w);
+ DECLARE_READ8_MEMBER(px4_ramdisk_control_r);
+ DECLARE_DRIVER_INIT(px4);
+ DECLARE_DRIVER_INIT(px4p);
+};
+
+
+/***************************************************************************
+ SERIAL PORT
+***************************************************************************/
+
+/* The floppy is connected to this port */
+
+static WRITE_LINE_DEVICE_HANDLER( px4_sio_txd )
+{
+ if (VERBOSE)
+ logerror("px4_sio_txd: %d\n", state);
+
+ if (device != NULL)
+ tf20_txs_w(device, state);
+}
+
+static READ_LINE_DEVICE_HANDLER( px4_sio_rxd )
+{
+ if (VERBOSE)
+ logerror("px4_sio_rxd\n");
+
+ if (device != NULL)
+ return tf20_rxs_r(device);
+ else
+ return ASSERT_LINE;
+}
+
+static READ_LINE_DEVICE_HANDLER( px4_sio_pin )
+{
+ if (VERBOSE)
+ logerror("px4_sio_pin\n");
+
+ if (device != NULL)
+ return tf20_pins_r(device);
+ else
+ return ASSERT_LINE;
+}
+
+static WRITE_LINE_DEVICE_HANDLER( px4_sio_pout )
+{
+ if (VERBOSE)
+ logerror("px4_sio_pout: %d\n", state);
+
+ if (device != NULL)
+ tf20_pouts_w(device, state);
+}
+
+
+/***************************************************************************
+ RS232C PORT
+***************************************************************************/
+
+/* Currently nothing is connected to this port */
+
+static WRITE_LINE_DEVICE_HANDLER( px4_rs232c_txd )
+{
+ if (VERBOSE)
+ logerror("px4_rs232c_txd: %d\n", state);
+}
+
+#ifdef UNUSED_FUNCTION
+static READ_LINE_DEVICE_HANDLER( px4_rs232c_rxd )
+{
+ if (VERBOSE)
+ logerror("px4_rs232c_rxd\n");
+ return ASSERT_LINE;
+}
+#endif
+
+static WRITE_LINE_DEVICE_HANDLER( px4_rs232c_rts )
+{
+ if (VERBOSE)
+ logerror("px4_rs232c_rts: %d\n", state);
+}
+
+static READ_LINE_DEVICE_HANDLER( px4_rs232c_cts )
+{
+ if (VERBOSE)
+ logerror("px4_rs232c_cts\n");
+
+ return ASSERT_LINE;
+}
+
+static READ_LINE_DEVICE_HANDLER( px4_rs232c_dsr )
+{
+ if (VERBOSE)
+ logerror("px4_rs232c_dsr\n");
+
+ return ASSERT_LINE;
+}
+
+static WRITE_LINE_DEVICE_HANDLER( px4_rs232c_dtr )
+{
+ if (VERBOSE)
+ logerror("px4_rs232c_dtr: %d\n", state);
+}
+
+static READ_LINE_DEVICE_HANDLER( px4_rs232c_dcd )
+{
+ if (VERBOSE)
+ logerror("px4_rs232c_dcd\n");
+
+ return ASSERT_LINE;
+}
+
+
+/***************************************************************************
+ GAPNIT
+***************************************************************************/
+
+/* process interrupts */
+static void gapnit_interrupt(running_machine &machine)
+{
+ px4_state *px4 = machine.driver_data<px4_state>();
+
+ /* any interrupts enabled and pending? */
+ if (px4->m_ier & px4->m_isr & INT0_7508)
+ {
+ px4->m_isr &= ~INT0_7508;
+ cputag_set_input_line_and_vector(machine, "maincpu", 0, ASSERT_LINE, 0xf0);
+ }
+ else if (px4->m_ier & px4->m_isr & INT1_ART)
+ cputag_set_input_line_and_vector(machine, "maincpu", 0, ASSERT_LINE, 0xf2);
+ else if (px4->m_ier & px4->m_isr & INT2_ICF)
+ cputag_set_input_line_and_vector(machine, "maincpu", 0, ASSERT_LINE, 0xf4);
+ else if (px4->m_ier & px4->m_isr & INT3_OVF)
+ cputag_set_input_line_and_vector(machine, "maincpu", 0, ASSERT_LINE, 0xf6);
+ else if (px4->m_ier & px4->m_isr & INT4_EXT)
+ cputag_set_input_line_and_vector(machine, "maincpu", 0, ASSERT_LINE, 0xf8);
+ else
+ cputag_set_input_line(machine, "maincpu", 0, CLEAR_LINE);
+}
+
+/* external cassette or barcode reader input */
+static TIMER_CALLBACK( ext_cassette_read )
+{
+ px4_state *px4 = machine.driver_data<px4_state>();
+ UINT8 result;
+ int trigger = 0;
+
+ /* sample input state */
+ result = (px4->m_ext_cas->input() > 0) ? 1 : 0;
+
+ /* detect transition */
+ switch ((px4->m_ctrl1 >> 1) & 0x03)
+ {
+ case 0: /* trigger inhibit */
+ trigger = 0;
+ break;
+ case 1: /* falling edge trigger */
+ trigger = px4->m_ear_last_state == 1 && result == 0;
+ break;
+ case 2: /* rising edge trigger */
+ trigger = px4->m_ear_last_state == 0 && result == 1;
+ break;
+ case 3: /* rising/falling edge trigger */
+ trigger = px4->m_ear_last_state != result;
+ break;
+ }
+
+ /* generate an interrupt if we need to trigger */
+ if (trigger)
+ {
+ px4->m_icrb = px4->m_frc_value;
+ px4->m_isr |= INT2_ICF;
+ gapnit_interrupt(machine);
+ }
+
+ /* save last state */
+ px4->m_ear_last_state = result;
+}
+
+/* free running counter */
+static TIMER_DEVICE_CALLBACK( frc_tick )
+{
+ px4_state *px4 = timer.machine().driver_data<px4_state>();
+
+ px4->m_frc_value++;
+
+ if (px4->m_frc_value == 0)
+ {
+ px4->m_isr |= INT3_OVF;
+ gapnit_interrupt(timer.machine());
+ }
+}
+
+/* input capture register low command trigger */
+READ8_MEMBER(px4_state::px4_icrlc_r)
+{
+
+ if (VERBOSE)
+ logerror("%s: px4_icrlc_r\n", machine().describe_context());
+
+ /* latch value */
+ m_frc_latch = m_frc_value;
+
+ return m_frc_latch & 0xff;
+}
+
+/* control register 1 */
+WRITE8_MEMBER(px4_state::px4_ctrl1_w)
+{
+ int baud;
+
+ if (VERBOSE)
+ logerror("%s: px4_ctrl1_w (0x%02x)\n", machine().describe_context(), data);
+
+ /* baudrate generator */
+ baud = data >> 4;
+
+ if (baud <= 12)
+ {
+ m_transmit_timer->adjust(attotime::zero, 0, attotime::from_hz(XTAL_7_3728MHz/2/transmit_rate[baud]));
+ m_receive_timer->adjust(attotime::zero, 0, attotime::from_hz(XTAL_7_3728MHz/2/receive_rate[baud]));
+ }
+
+ m_ctrl1 = data;
+}
+
+/* input capture register high command trigger */
+READ8_MEMBER(px4_state::px4_icrhc_r)
+{
+
+ if (VERBOSE)
+ logerror("%s: px4_icrhc_r\n", machine().describe_context());
+
+ return (m_frc_latch >> 8) & 0xff;
+}
+
+/* command register */
+WRITE8_MEMBER(px4_state::px4_cmdr_w)
+{
+
+ if (VERBOSE)
+ logerror("%s: px4_cmdr_w (0x%02x)\n", machine().describe_context(), data);
+
+ /* clear overflow interrupt? */
+ if (BIT(data, 2))
+ {
+ m_isr &= ~INT3_OVF;
+ gapnit_interrupt(machine());
+ }
+}
+
+/* input capture register low barcode trigger */
+READ8_MEMBER(px4_state::px4_icrlb_r)
+{
+
+ if (VERBOSE)
+ logerror("%s: px4_icrlb_r\n", machine().describe_context());
+
+ return m_icrb & 0xff;
+}
+
+/* control register 2 */
+WRITE8_MEMBER(px4_state::px4_ctrl2_w)
+{
+
+ if (VERBOSE)
+ logerror("%s: px4_ctrl2_w (0x%02x)\n", machine().describe_context(), data);
+
+ /* bit 0, MIC, cassette output */
+ m_ext_cas->output( BIT(data, 0) ? -1.0 : +1.0);
+
+ /* bit 1, RMT, cassette motor */
+ if (BIT(data, 1))
+ {
+ m_ext_cas->change_state(CASSETTE_MOTOR_ENABLED,CASSETTE_MASK_MOTOR);
+ m_ext_cas_timer->adjust(attotime::zero, 0, attotime::from_hz(44100));
+ }
+ else
+ {
+ m_ext_cas->change_state(CASSETTE_MOTOR_DISABLED,CASSETTE_MASK_MOTOR);
+ m_ext_cas_timer->adjust(attotime::zero);
+ }
+}
+
+/* input capture register high barcode trigger */
+READ8_MEMBER(px4_state::px4_icrhb_r)
+{
+
+ if (VERBOSE)
+ logerror("%s: px4_icrhb_r\n", machine().describe_context());
+
+ /* clear icf interrupt */
+ m_isr &= ~INT2_ICF;
+ gapnit_interrupt(machine());
+
+ return (m_icrb >> 8) & 0xff;
+}
+
+/* interrupt status register */
+READ8_MEMBER(px4_state::px4_isr_r)
+{
+
+ if (VERBOSE)
+ logerror("%s: px4_isr_r\n", machine().describe_context());
+
+ return m_isr;
+}
+
+/* interrupt enable register */
+WRITE8_MEMBER(px4_state::px4_ier_w)
+{
+
+ if (VERBOSE)
+ logerror("%s: px4_ier_w (0x%02x)\n", machine().describe_context(), data);
+
+ m_ier = data;
+ gapnit_interrupt(machine());
+}
+
+/* status register */
+READ8_MEMBER(px4_state::px4_str_r)
+{
+ UINT8 result = 0;
+
+ if (VERBOSE)
+ logerror("%s: px4_str_r\n", machine().describe_context());
+
+ result |= (m_ext_cas)->input() > 0 ? 1 : 0;
+ result |= 1 << 1; /* BCRD, barcode reader input */
+ result |= 1 << 2; /* RDY signal from 7805 */
+ result |= 1 << 3; /* RDYSIO, enable access to the 7805 */
+ result |= m_bankr & 0xf0; /* bit 4-7, BANK - memory bank */
+
+ return result;
+}
+
+/* helper function to map rom capsules */
+static void install_rom_capsule(address_space *space, int size, const char *region)
+{
+ px4_state *state = space->machine().driver_data<px4_state>();
+
+ /* ram, part 1 */
+ space->install_readwrite_bank(0x0000, 0xdfff - size, "bank1");
+ state->membank("bank1")->set_base(state->m_ram->pointer());
+
+ /* actual rom data, part 1 */
+ space->install_read_bank(0xe000 - size, 0xffff - size, "bank2");
+ space->nop_write(0xe000 - size, 0xffff - size);
+ state->membank("bank2")->set_base(space->machine().root_device().memregion(region)->base() + (size - 0x2000));
+
+ /* rom data, part 2 */
+ if (size != 0x2000)
+ {
+ space->install_read_bank(0x10000 - size, 0xdfff, "bank3");
+ space->nop_write(0x10000 - size, 0xdfff);
+ state->membank("bank3")->set_base(state->memregion(region)->base());
+ }
+
+ /* ram, continued */
+ space->install_readwrite_bank(0xe000, 0xffff, "bank4");
+ state->membank("bank4")->set_base(state->m_ram->pointer() + 0xe000);
+}
+
+/* bank register */
+WRITE8_MEMBER(px4_state::px4_bankr_w)
+{
+ address_space *space_program = machine().device("maincpu")->memory().space(AS_PROGRAM);
+
+ if (VERBOSE)
+ logerror("%s: px4_bankr_w (0x%02x)\n", machine().describe_context(), data);
+
+ m_bankr = data;
+
+ /* bank switch */
+ switch (data >> 4)
+ {
+ case 0x00:
+ /* system bank */
+ space_program->install_read_bank(0x0000, 0x7fff, "bank1");
+ space_program->nop_write(0x0000, 0x7fff);
+ membank("bank1")->set_base(machine().root_device().memregion("os")->base());
+ space_program->install_readwrite_bank(0x8000, 0xffff, "bank2");
+ membank("bank2")->set_base(m_ram->pointer() + 0x8000);
+ break;
+
+ case 0x04:
+ /* memory */
+ space_program->install_readwrite_bank(0x0000, 0xffff, "bank1");
+ membank("bank1")->set_base(m_ram->pointer());
+ break;
+
+ case 0x08: install_rom_capsule(space_program, 0x2000, "capsule1"); break;
+ case 0x09: install_rom_capsule(space_program, 0x4000, "capsule1"); break;
+ case 0x0a: install_rom_capsule(space_program, 0x8000, "capsule1"); break;
+ case 0x0c: install_rom_capsule(space_program, 0x2000, "capsule2"); break;
+ case 0x0d: install_rom_capsule(space_program, 0x4000, "capsule2"); break;
+ case 0x0e: install_rom_capsule(space_program, 0x8000, "capsule2"); break;
+
+ default:
+ if (VERBOSE)
+ logerror("invalid bank switch value: 0x%02x\n", data >> 4);
+
+ }
+}
+
+/* serial io register */
+READ8_MEMBER(px4_state::px4_sior_r)
+{
+
+ if (VERBOSE)
+ logerror("%s: px4_sior_r 0x%02x\n", machine().describe_context(), m_sior);
+
+ return m_sior;
+}
+
+/* serial io register */
+WRITE8_MEMBER(px4_state::px4_sior_w)
+{
+
+ if (VERBOSE)
+ logerror("%s: px4_sior_w (0x%02x)\n", machine().describe_context(), data);
+
+ m_sior = data;
+
+ switch (data)
+ {
+ case 0x01:
+
+ if (VERBOSE)
+ logerror("7508 cmd: Power OFF\n");
+
+ break;
+
+ case 0x02:
+
+ if (VERBOSE)
+ logerror("7508 cmd: Read Status\n");
+
+ if (m_interrupt_status != 0)
+ {
+ if (VERBOSE)
+ logerror("> 7508 has interrupts pending: 0x%02x\n", m_interrupt_status);
+
+ /* signal the interrupt(s) */
+ m_sior = 0xc1 | m_interrupt_status;
+ m_interrupt_status = 0x00;
+ }
+ else if (m_key_status != 0xff)
+ {
+ m_sior = m_key_status;
+ m_key_status = 0xff;
+ }
+ else
+ {
+ /* nothing happenend */
+ m_sior = 0xbf;
+ }
+
+ break;
+
+ case 0x03: if (VERBOSE) logerror("7508 cmd: KB Reset\n"); break;
+ case 0x04: if (VERBOSE) logerror("7508 cmd: KB Repeat Timer 1 Set\n"); break;
+ case 0x14: if (VERBOSE) logerror("7508 cmd: KB Repeat Timer 2 Set\n"); break;
+ case 0x24: if (VERBOSE) logerror("7508 cmd: KB Repeat Timer 1 Read\n"); break;
+ case 0x34: if (VERBOSE) logerror("7508 cmd: KB Repeat Timer 2 Read\n"); break;
+ case 0x05: if (VERBOSE) logerror("7508 cmd: KB Repeat OFF\n"); break;
+ case 0x15: if (VERBOSE) logerror("7508 cmd: KB Repeat ON\n"); break;
+
+ case 0x06:
+
+ if (VERBOSE)
+ logerror("7508 cmd: KB Interrupt OFF\n");
+
+ m_key_int_enabled = FALSE;
+ break;
+
+ case 0x16:
+
+ if (VERBOSE)
+ logerror("7508 cmd: KB Interrupt ON\n");
+
+ m_key_int_enabled = TRUE;
+ break;
+
+ case 0x07: if (VERBOSE) logerror("7508 cmd: Clock Read\n"); break;
+ case 0x17: if (VERBOSE) logerror("7508 cmd: Clock Write\n"); break;
+
+ case 0x08:
+
+ if (VERBOSE)
+ logerror("7508 cmd: Power Switch Read\n");
+
+ /* indicate that the power switch is in the "ON" position */
+ m_sior = 0x01;
+ break;
+
+ case 0x09: if (VERBOSE) logerror("7508 cmd: Alarm Read\n"); break;
+ case 0x19: if (VERBOSE) logerror("7508 cmd: Alarm Set\n"); break;
+ case 0x29: if (VERBOSE) logerror("7508 cmd: Alarm OFF\n"); break;
+ case 0x39: if (VERBOSE) logerror("7508 cmd: Alarm ON\n"); break;
+
+ case 0x0a:
+
+ if (VERBOSE)
+ logerror("7508 cmd: DIP Switch Read\n");
+ m_sior = ioport("dips")->read();
+ break;
+
+ case 0x0b: if (VERBOSE) logerror("7508 cmd: Stop Key Interrupt disable\n"); break;
+ case 0x1b: if (VERBOSE) logerror("7508 cmd: Stop Key Interrupt enable\n"); break;
+ case 0x0c: if (VERBOSE) logerror("7508 cmd: 7 chr. Buffer\n"); break;
+ case 0x1c: if (VERBOSE) logerror("7508 cmd: 1 chr. Buffer\n"); break;
+
+ case 0x0d:
+
+ if (VERBOSE)
+ logerror("7508 cmd: 1 sec. Interrupt OFF\n");
+
+ m_one_sec_int_enabled = FALSE;
+ break;
+
+ case 0x1d:
+
+ if (VERBOSE)
+ logerror("7508 cmd: 1 sec. Interrupt ON\n");
+
+ m_one_sec_int_enabled = TRUE;
+ break;
+
+ case 0x0e:
+
+ if (VERBOSE)
+ logerror("7508 cmd: KB Clear\n");
+
+ m_sior = 0xbf;
+ break;
+
+ case 0x0f: if (VERBOSE) logerror("7508 cmd: System Reset\n"); break;
+ }
+}
+
+
+/***************************************************************************
+ GAPNDL
+***************************************************************************/
+
+/* vram start address register */
+WRITE8_MEMBER(px4_state::px4_vadr_w)
+{
+
+ if (VERBOSE)
+ logerror("%s: px4_vadr_w (0x%02x)\n", machine().describe_context(), data);
+
+ m_vadr = data;
+}
+
+/* y offset register */
+WRITE8_MEMBER(px4_state::px4_yoff_w)
+{
+
+ if (VERBOSE)
+ logerror("%s: px4_yoff_w (0x%02x)\n", machine().describe_context(), data);
+
+ m_yoff = data;
+}
+
+/* frame register */
+WRITE8_MEMBER(px4_state::px4_fr_w)
+{
+ if (VERBOSE)
+ logerror("%s: px4_fr_w (0x%02x)\n", machine().describe_context(), data);
+}
+
+/* speed-up register */
+WRITE8_MEMBER(px4_state::px4_spur_w)
+{
+ if (VERBOSE)
+ logerror("%s: px4_spur_w (0x%02x)\n", machine().describe_context(), data);
+}
+
+
+/***************************************************************************
+ GAPNIO
+***************************************************************************/
+
+static TIMER_CALLBACK( transmit_data )
+{
+ px4_state *px4 = machine.driver_data<px4_state>();
+
+ if (BIT(px4->m_artcr, 0))// ART_TX_ENABLED
+ {
+
+ }
+}
+
+static TIMER_CALLBACK( receive_data )
+{
+ px4_state *px4 = machine.driver_data<px4_state>();
+
+ if (ART_RX_ENABLED)
+ {
+
+ }
+}
+
+/* cartridge interface */
+READ8_MEMBER(px4_state::px4_ctgif_r)
+{
+ if (VERBOSE)
+ logerror("%s: px4_ctgif_r @ 0x%02x\n", machine().describe_context(), offset);
+
+ return 0xff;
+}
+
+/* cartridge interface */
+WRITE8_MEMBER(px4_state::px4_ctgif_w)
+{
+ if (VERBOSE)
+ logerror("%s: px4_ctgif_w (0x%02x @ 0x%02x)\n", machine().describe_context(), data, offset);
+}
+
+/* art data input register */
+READ8_MEMBER(px4_state::px4_artdir_r)
+{
+
+ if (VERBOSE)
+ logerror("%s: px4_artdir_r\n", machine().describe_context());
+
+ return m_artdir;
+}
+
+/* art data output register */
+WRITE8_MEMBER(px4_state::px4_artdor_w)
+{
+
+ if (VERBOSE)
+ logerror("%s: px4_artdor_w (0x%02x)\n", machine().describe_context(), data);
+
+ /* clear ready */
+ m_artsr &= ~ART_TXRDY;
+
+ m_artdor = data;
+}
+
+/* art status register */
+READ8_MEMBER(px4_state::px4_artsr_r)
+{
+ UINT8 result = 0;
+
+ if (VERBOSE)
+ logerror("%s: px4_artsr_r\n", machine().describe_context());
+
+ result |= px4_rs232c_dsr(m_rs232c_device) << 7;
+
+ return result | m_artsr;
+}
+
+/* art mode register */
+WRITE8_MEMBER(px4_state::px4_artmr_w)
+{
+
+ if (VERBOSE)
+ logerror("%s: px4_artmr_w (0x%02x)\n", machine().describe_context(), data);
+
+ m_artmr = data;
+}
+
+/* io status register */
+READ8_MEMBER(px4_state::px4_iostr_r)
+{
+ UINT8 result = 0;
+
+ if (VERBOSE)
+ logerror("%s: px4_iostr_r\n", machine().describe_context());
+
+ result |= m_centronics->busy_r() << 0;
+ result |= !m_centronics->pe_r() << 1;
+ result |= px4_sio_pin(m_sio_device) << 2;
+ result |= px4_sio_rxd(m_sio_device) << 3;
+ result |= px4_rs232c_dcd(m_rs232c_device) << 4;
+ result |= px4_rs232c_cts(m_rs232c_device) << 5;
+ result |= 1 << 6; /* bit 6, csel, cartridge option select signal, set to 'other mode' */
+ result |= 0 << 7; /* bit 7, caud - audio input from cartridge */
+
+ return result;
+}
+
+/* art command register */
+WRITE8_MEMBER(px4_state::px4_artcr_w)
+{
+
+ if (VERBOSE)
+ logerror("%s: px4_artcr_w (0x%02x)\n", machine().describe_context(), data);
+
+ m_artcr = data;
+
+ /* bit 0, txe - transmit enable */
+ if (!ART_TX_ENABLED)
+ {
+ /* force high when disabled */
+ px4_sio_txd(m_sio_device, ASSERT_LINE);
+ px4_rs232c_txd(m_rs232c_device, ASSERT_LINE);
+ }
+
+ /* bit 3, sbrk - break output */
+ if (ART_TX_ENABLED && BIT(data, 3))
+ {
+ /* force low when enabled and transmit enabled */
+ px4_sio_txd(m_sio_device, CLEAR_LINE);
+ px4_rs232c_txd(m_rs232c_device, CLEAR_LINE);
+ }
+
+ /* error reset */
+ if (BIT(data, 4))
+ m_artsr &= ~(ART_PE | ART_OE | ART_FE);
+
+ px4_rs232c_dtr(m_rs232c_device, BIT(data, 1));
+ px4_rs232c_rts(m_rs232c_device, BIT(data, 5));
+}
+
+/* switch register */
+WRITE8_MEMBER(px4_state::px4_swr_w)
+{
+
+ if (VERBOSE)
+ logerror("%s: px4_swr_w (0x%02x)\n", machine().describe_context(), data);
+
+ m_swr = data;
+}
+
+/* io control register */
+WRITE8_MEMBER(px4_state::px4_ioctlr_w)
+{
+
+ if (VERBOSE)
+ logerror("%s: px4_ioctlr_w (0x%02x)\n", machine().describe_context(), data);
+
+ m_centronics->strobe_w(!BIT(data, 0));
+ m_centronics->init_prime_w(BIT(data, 1));
+
+ px4_sio_pout(m_sio_device, BIT(data, 2));
+
+ /* bit 3, cartridge reset */
+
+ output_set_value("led_0", BIT(data, 4)); /* caps lock */
+ output_set_value("led_1", BIT(data, 5)); /* num lock */
+ output_set_value("led_2", BIT(data, 6)); /* "led 2" */
+
+ /* bit 7, sp - speaker */
+}
+
+
+/***************************************************************************
+ 7508 RELATED
+***************************************************************************/
+
+static TIMER_DEVICE_CALLBACK( upd7508_1sec_callback )
+{
+ px4_state *px4 = timer.machine().driver_data<px4_state>();
+
+ /* adjust interrupt status */
+ px4->m_interrupt_status |= UPD7508_INT_ONE_SECOND;
+
+ /* are interrupts enabled? */
+ if (px4->m_one_sec_int_enabled)
+ {
+ px4->m_isr |= INT0_7508;
+ gapnit_interrupt(timer.machine());
+ }
+}
+
+static INPUT_CHANGED( key_callback )
+{
+ px4_state *px4 = field.machine().driver_data<px4_state>();
+ UINT32 oldvalue = oldval * field.mask(), newvalue = newval * field.mask();
+ UINT32 delta = oldvalue ^ newvalue;
+ int i, scancode = 0xff, down = 0;
+
+ for (i = 0; i < 32; i++)
+ {
+ if (delta & (1 << i))
+ {
+ down = (newvalue & (1 << i)) ? 0x10 : 0x00;
+ scancode = (FPTR)param * 32 + i;
+
+ /* control keys */
+ if ((scancode & 0xa0) == 0xa0)
+ scancode |= down;
+
+ if (VERBOSE)
+ logerror("upd7508: key callback, key=0x%02x\n", scancode);
+
+ break;
+ }
+ }
+
+ if (down || (scancode & 0xa0) == 0xa0)
+ {
+ px4->m_key_status = scancode;
+
+ if (px4->m_key_int_enabled)
+ {
+ if (VERBOSE)
+ logerror("upd7508: key interrupt\n");
+
+ px4->m_isr |= INT0_7508;
+ gapnit_interrupt(field.machine());
+ }
+ }
+}
+
+
+/***************************************************************************
+ EXTERNAL RAM-DISK
+***************************************************************************/
+
+WRITE8_MEMBER(px4_state::px4_ramdisk_address_w)
+{
+
+ switch (offset)
+ {
+ case 0x00: m_ramdisk_address = (m_ramdisk_address & 0xffff00) | data; break;
+ case 0x01: m_ramdisk_address = (m_ramdisk_address & 0xff00ff) | (data << 8); break;
+ case 0x02: m_ramdisk_address = (m_ramdisk_address & 0x00ffff) | ((data & 0x07) << 16); break;
+ }
+}
+
+READ8_MEMBER(px4_state::px4_ramdisk_data_r)
+{
+ UINT8 ret = 0xff;
+
+ if (m_ramdisk_address < 0x20000)
+ {
+ /* read from ram */
+ ret = m_ramdisk[m_ramdisk_address];
+ }
+ else if (m_ramdisk_address < 0x40000)
+ {
+ /* read from rom */
+ ret = memregion("ramdisk")->base()[m_ramdisk_address];
+ }
+
+ m_ramdisk_address = (m_ramdisk_address & 0xffff00) | ((m_ramdisk_address & 0xff) + 1);
+
+ return ret;
+}
+
+WRITE8_MEMBER(px4_state::px4_ramdisk_data_w)
+{
+
+ if (m_ramdisk_address < 0x20000)
+ m_ramdisk[m_ramdisk_address] = data;
+
+ m_ramdisk_address = (m_ramdisk_address & 0xffff00) | ((m_ramdisk_address & 0xff) + 1);
+}
+
+READ8_MEMBER(px4_state::px4_ramdisk_control_r)
+{
+ /* bit 7 determines the presence of a ram-disk */
+ return 0x7f;
+}
+
+/***************************************************************************
+ VIDEO EMULATION
+***************************************************************************/
+
+static SCREEN_UPDATE_IND16( px4 )
+{
+ px4_state *px4 = screen.machine().driver_data<px4_state>();
+
+ /* display enabled? */
+ if (BIT(px4->m_yoff, 7))
+ {
+ int y, x;
+
+ /* get vram start address */
+ UINT8 *vram = &px4->m_ram->pointer()[(px4->m_vadr & 0xf8) << 8];
+
+ for (y = 0; y < 64; y++)
+ {
+ /* adjust against y-offset */
+ UINT8 row = (y - (px4->m_yoff & 0x3f)) & 0x3f;
+
+ for (x = 0; x < 240/8; x++)
+ {
+ bitmap.pix16(row, x * 8 + 0) = BIT(*vram, 7);
+ bitmap.pix16(row, x * 8 + 1) = BIT(*vram, 6);
+ bitmap.pix16(row, x * 8 + 2) = BIT(*vram, 5);
+ bitmap.pix16(row, x * 8 + 3) = BIT(*vram, 4);
+ bitmap.pix16(row, x * 8 + 4) = BIT(*vram, 3);
+ bitmap.pix16(row, x * 8 + 5) = BIT(*vram, 2);
+ bitmap.pix16(row, x * 8 + 6) = BIT(*vram, 1);
+ bitmap.pix16(row, x * 8 + 7) = BIT(*vram, 0);
+
+ vram++;
+ }
+
+ /* skip the last 2 unused bytes */
+ vram += 2;
+ }
+ }
+ else
+ {
+ /* display is disabled, draw an empty screen */
+ bitmap.fill(0, cliprect);
+ }
+
+ return 0;
+}
+
+
+/***************************************************************************
+ DRIVER INIT
+***************************************************************************/
+
+DRIVER_INIT_MEMBER(px4_state,px4)
+{
+
+ /* find devices */
+ m_ram = machine().device<ram_device>(RAM_TAG);
+
+ /* init 7508 */
+ m_one_sec_int_enabled = TRUE;
+ m_key_int_enabled = TRUE;
+ m_alarm_int_enabled = TRUE;
+
+ /* art */
+ m_receive_timer = machine().scheduler().timer_alloc(FUNC(receive_data));
+ m_transmit_timer = machine().scheduler().timer_alloc(FUNC(transmit_data));
+
+ /* printer */
+ m_centronics = machine().device<centronics_device>("centronics");
+
+ /* external cassette or barcode reader */
+ m_ext_cas_timer = machine().scheduler().timer_alloc(FUNC(ext_cassette_read));
+ m_ext_cas = machine().device<cassette_image_device>("extcas");
+ m_ear_last_state = 0;
+
+ /* external devices */
+ m_sio_device = machine().device("floppy");
+ m_rs232c_device = NULL;
+
+ /* map os rom and last half of memory */
+ membank("bank1")->set_base(machine().root_device().memregion("os")->base());
+ membank("bank2")->set_base(m_ram->pointer() + 0x8000);
+}
+
+DRIVER_INIT_MEMBER(px4_state,px4p)
+{
+
+ DRIVER_INIT_CALL(px4);
+
+ /* reserve memory for external ram-disk */
+ m_ramdisk = auto_alloc_array(machine(), UINT8, 0x20000);
+}
+
+static MACHINE_RESET( px4 )
+{
+ px4_state *px4 = machine.driver_data<px4_state>();
+
+ px4->m_artsr = ART_TXRDY | ART_TXEMPTY;
+}
+
+static MACHINE_START( px4_ramdisk )
+{
+ px4_state *px4 = machine.driver_data<px4_state>();
+ machine.device<nvram_device>("nvram")->set_base(px4->m_ramdisk, 0x20000);
+}
+
+/***************************************************************************
+ ADDRESS MAPS
+***************************************************************************/
+
+static ADDRESS_MAP_START( px4_mem, AS_PROGRAM, 8, px4_state )
+ AM_RANGE(0x0000, 0x7fff) AM_ROMBANK("bank1")
+ AM_RANGE(0x8000, 0xffff) AM_RAMBANK("bank2")
+ADDRESS_MAP_END
+
+static ADDRESS_MAP_START( px4_io, AS_IO, 8, px4_state )
+ ADDRESS_MAP_UNMAP_HIGH
+ ADDRESS_MAP_GLOBAL_MASK(0xff)
+ /* gapnit, 0x00-0x07 */
+ AM_RANGE(0x00, 0x00) AM_READWRITE(px4_icrlc_r, px4_ctrl1_w)
+ AM_RANGE(0x01, 0x01) AM_READWRITE(px4_icrhc_r, px4_cmdr_w)
+ AM_RANGE(0x02, 0x02) AM_READWRITE(px4_icrlb_r, px4_ctrl2_w)
+ AM_RANGE(0x03, 0x03) AM_READ(px4_icrhb_r)
+ AM_RANGE(0x04, 0x04) AM_READWRITE(px4_isr_r, px4_ier_w)
+ AM_RANGE(0x05, 0x05) AM_READWRITE(px4_str_r, px4_bankr_w)
+ AM_RANGE(0x06, 0x06) AM_READWRITE(px4_sior_r, px4_sior_w)
+ AM_RANGE(0x07, 0x07) AM_NOP
+ /* gapndl, 0x08-0x0f */
+ AM_RANGE(0x08, 0x08) AM_WRITE(px4_vadr_w)
+ AM_RANGE(0x09, 0x09) AM_WRITE(px4_yoff_w)
+ AM_RANGE(0x0a, 0x0a) AM_WRITE(px4_fr_w)
+ AM_RANGE(0x0b, 0x0b) AM_WRITE(px4_spur_w)
+ AM_RANGE(0x0c, 0x0f) AM_NOP
+ /* gapnio, 0x10-0x1f */
+ AM_RANGE(0x10, 0x13) AM_READWRITE(px4_ctgif_r, px4_ctgif_w)
+ AM_RANGE(0x14, 0x14) AM_READWRITE(px4_artdir_r, px4_artdor_w)
+ AM_RANGE(0x15, 0x15) AM_READWRITE(px4_artsr_r, px4_artmr_w)
+ AM_RANGE(0x16, 0x16) AM_READWRITE(px4_iostr_r, px4_artcr_w)
+ AM_RANGE(0x17, 0x17) AM_DEVWRITE("centronics", centronics_device, write)
+ AM_RANGE(0x18, 0x18) AM_WRITE(px4_swr_w)
+ AM_RANGE(0x19, 0x19) AM_WRITE(px4_ioctlr_w)
+ AM_RANGE(0x1a, 0x1f) AM_NOP
+ADDRESS_MAP_END
+
+static ADDRESS_MAP_START( px4p_io, AS_IO, 8, px4_state )
+ AM_IMPORT_FROM(px4_io)
+ AM_RANGE(0x90, 0x92) AM_WRITE(px4_ramdisk_address_w)
+ AM_RANGE(0x93, 0x93) AM_READWRITE(px4_ramdisk_data_r, px4_ramdisk_data_w)
+ AM_RANGE(0x94, 0x94) AM_READ(px4_ramdisk_control_r)
+ADDRESS_MAP_END
+
+
+/***************************************************************************
+ INPUT PORTS
+***************************************************************************/
+
+/* The PX-4 has an exchangeable keyboard. Available is a standard ASCII
+ * keyboard and an "item" keyboard, as well as regional variants for
+ * UK, France, Germany, Denmark, Sweden, Norway, Italy and Spain.
+ */
+
+/* configuration dip switch found on the rom capsule board */
+static INPUT_PORTS_START( px4_dips )
+ PORT_START("dips")
+
+ PORT_DIPNAME(0x0f, 0x0f, "Character set")
+ PORT_DIPLOCATION("PX-4 DIP:8,7,6,5")
+ PORT_DIPSETTING(0x0f, "ASCII")
+ PORT_DIPSETTING(0x0e, "France")
+ PORT_DIPSETTING(0x0d, "Germany")
+ PORT_DIPSETTING(0x0c, "England")
+ PORT_DIPSETTING(0x0b, "Denmark")
+ PORT_DIPSETTING(0x0a, "Sweden")
+ PORT_DIPSETTING(0x09, "Italy")
+ PORT_DIPSETTING(0x08, "Spain")
+ PORT_DIPSETTING(0x07, DEF_STR(Japan))
+ PORT_DIPSETTING(0x06, "Norway")
+
+ PORT_DIPNAME(0x30, 0x30, "LST device")
+ PORT_DIPLOCATION("DIP:4,3")
+ PORT_DIPSETTING(0x00, "SIO")
+ PORT_DIPSETTING(0x10, "Cartridge printer")
+ PORT_DIPSETTING(0x20, "RS-232C")
+ PORT_DIPSETTING(0x30, "Centronics printer")
+
+ /* available for user applications */
+ PORT_DIPNAME(0x40, 0x40, "Not used")
+ PORT_DIPLOCATION("DIP:2")
+ PORT_DIPSETTING(0x40, "Enable")
+ PORT_DIPSETTING(0x00, "Disable")
+
+ /* this is automatically selected by the os, the switch has no effect */
+ PORT_DIPNAME(0x80, 0x00, "Keyboard type")
+ PORT_DIPLOCATION("DIP:1")
+ PORT_DIPSETTING(0x80, "Item keyboard")
+ PORT_DIPSETTING(0x00, "Standard keyboard")
+INPUT_PORTS_END
+
+/* US ASCII keyboard */
+static INPUT_PORTS_START( px4_h450a )
+ PORT_INCLUDE(px4_dips)
+ PORT_INCLUDE(tf20)
+
+ PORT_START("keyboard_0")
+ PORT_BIT(0x00000001, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)0) PORT_CODE(KEYCODE_F1) PORT_CHAR(UCHAR_MAMEKEY(ESC)) // 00
+ PORT_BIT(0x00000002, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)0) PORT_CODE(KEYCODE_F2) PORT_CHAR(UCHAR_MAMEKEY(PAUSE)) // 01
+ PORT_BIT(0x00000004, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)0) PORT_CODE(KEYCODE_F3) PORT_CHAR(UCHAR_MAMEKEY(F6)) PORT_NAME("Help") // 02
+ PORT_BIT(0x00000008, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)0) PORT_CODE(KEYCODE_F4) PORT_CHAR(UCHAR_MAMEKEY(F1)) PORT_NAME("PF1") // 03
+ PORT_BIT(0x00000010, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)0) PORT_CODE(KEYCODE_F5) PORT_CHAR(UCHAR_MAMEKEY(F2)) PORT_NAME("PF2") // 04
+ PORT_BIT(0x00000020, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)0) PORT_CODE(KEYCODE_F6) PORT_CHAR(UCHAR_MAMEKEY(F3)) PORT_NAME("PF3") // 05
+ PORT_BIT(0x00000040, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)0) PORT_CODE(KEYCODE_F7) PORT_CHAR(UCHAR_MAMEKEY(F4)) PORT_NAME("PF4") // 06
+ PORT_BIT(0x00000080, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)0) PORT_CODE(KEYCODE_F8) PORT_CHAR(UCHAR_MAMEKEY(F5)) PORT_NAME("PF5") // 07
+ PORT_BIT(0x0000ff00, IP_ACTIVE_HIGH, IPT_UNUSED) // 08-0f
+ PORT_BIT(0x00010000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)0) PORT_CODE(KEYCODE_ESC) PORT_CHAR(UCHAR_MAMEKEY(CANCEL)) PORT_NAME("Stop") // 10
+ PORT_BIT(0x00020000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)0) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!') // 11
+ PORT_BIT(0x00040000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)0) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('"') // 12
+ PORT_BIT(0x00080000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)0) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#') // 13
+ PORT_BIT(0x00100000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)0) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$') // 14
+ PORT_BIT(0x00200000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)0) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%') // 15
+ PORT_BIT(0x00400000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)0) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('&') // 16
+ PORT_BIT(0x00800000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)0) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('\'') // 17
+ PORT_BIT(0xff000000, IP_ACTIVE_HIGH, IPT_UNUSED) // 18-1f
+
+ PORT_START("keyboard_1")
+ PORT_BIT(0x00000001, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)1) PORT_CODE(KEYCODE_Q) PORT_CHAR('q') PORT_CHAR('Q') // 20
+ PORT_BIT(0x00000002, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)1) PORT_CODE(KEYCODE_W) PORT_CHAR('w') PORT_CHAR('W') // 21
+ PORT_BIT(0x00000004, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)1) PORT_CODE(KEYCODE_E) PORT_CHAR('e') PORT_CHAR('E') // 22
+ PORT_BIT(0x00000008, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)1) PORT_CODE(KEYCODE_R) PORT_CHAR('r') PORT_CHAR('R') // 23
+ PORT_BIT(0x00000010, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)1) PORT_CODE(KEYCODE_T) PORT_CHAR('t') PORT_CHAR('T') // 24
+ PORT_BIT(0x00000020, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)1) PORT_CODE(KEYCODE_Y) PORT_CHAR('y') PORT_CHAR('Y') // 25
+ PORT_BIT(0x00000040, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)1) PORT_CODE(KEYCODE_U) PORT_CHAR('u') PORT_CHAR('U') // 26
+ PORT_BIT(0x00000080, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)1) PORT_CODE(KEYCODE_I) PORT_CHAR('i') PORT_CHAR('I') // 27
+ PORT_BIT(0x0000ff00, IP_ACTIVE_HIGH, IPT_UNUSED) // 28-2f
+ PORT_BIT(0x00010000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)1) PORT_CODE(KEYCODE_D) PORT_CHAR('d') PORT_CHAR('D') // 30
+ PORT_BIT(0x00020000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)1) PORT_CODE(KEYCODE_F) PORT_CHAR('f') PORT_CHAR('F') // 31
+ PORT_BIT(0x00040000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)1) PORT_CODE(KEYCODE_G) PORT_CHAR('g') PORT_CHAR('G') // 32
+ PORT_BIT(0x00080000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)1) PORT_CODE(KEYCODE_H) PORT_CHAR('h') PORT_CHAR('H') // 33
+ PORT_BIT(0x00100000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)1) PORT_CODE(KEYCODE_J) PORT_CHAR('j') PORT_CHAR('J') // 34
+ PORT_BIT(0x00200000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)1) PORT_CODE(KEYCODE_K) PORT_CHAR('k') PORT_CHAR('K') // 35
+ PORT_BIT(0x00400000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)1) PORT_CODE(KEYCODE_L) PORT_CHAR('l') PORT_CHAR('L') // 36
+ PORT_BIT(0x00800000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)1) PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR('+') // 37
+ PORT_BIT(0xff000000, IP_ACTIVE_HIGH, IPT_UNUSED) // 38-3f
+
+ PORT_START("keyboard_2")
+ PORT_BIT(0x00000001, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)2) PORT_CODE(KEYCODE_B) PORT_CHAR('b') PORT_CHAR('B') // 40
+ PORT_BIT(0x00000002, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)2) PORT_CODE(KEYCODE_N) PORT_CHAR('n') PORT_CHAR('N') // 41
+ PORT_BIT(0x00000004, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)2) PORT_CODE(KEYCODE_M) PORT_CHAR('m') PORT_CHAR('M') // 42
+ PORT_BIT(0x00000008, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)2) PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<') // 43
+ PORT_BIT(0x00000010, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)2) PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>') // 44
+ PORT_BIT(0x00000020, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)2) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?') // 45
+ PORT_BIT(0x00000040, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)2) PORT_CODE(KEYCODE_F9) PORT_CHAR('[') PORT_CHAR('{') // 46
+ PORT_BIT(0x00000080, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)2) PORT_CODE(KEYCODE_F10) PORT_CHAR(']') PORT_CHAR('}') // 47
+ PORT_BIT(0x0000ff00, IP_ACTIVE_HIGH, IPT_UNUSED) // 48-4f
+ PORT_BIT(0x00010000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)2) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('(') // 50
+ PORT_BIT(0x00020000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)2) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR(')') // 51
+ PORT_BIT(0x00040000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)2) PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_CHAR('_') // 52
+ PORT_BIT(0x00080000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)2) PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('=') // 53
+ PORT_BIT(0x00100000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)2) PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('^') PORT_CHAR('~') // 54
+ PORT_BIT(0x00200000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)2) PORT_CODE(KEYCODE_UP) PORT_CHAR(UCHAR_MAMEKEY(UP)) // 55
+ PORT_BIT(0x00400000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)2) PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(8) PORT_CHAR(UCHAR_MAMEKEY(HOME)) // 56
+ PORT_BIT(0x00800000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)2) PORT_CODE(KEYCODE_TAB) PORT_CHAR('\t') // 57
+ PORT_BIT(0xff000000, IP_ACTIVE_HIGH, IPT_UNUSED) // 58-5f
+
+ PORT_START("keyboard_3")
+ PORT_BIT(0x00000001, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)3) PORT_CODE(KEYCODE_O) PORT_CHAR('o') PORT_CHAR('O') // 60
+ PORT_BIT(0x00000002, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)3) PORT_CODE(KEYCODE_P) PORT_CHAR('p') PORT_CHAR('P') // 61
+ PORT_BIT(0x00000004, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)3) PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('@') PORT_CHAR(96) // 62
+ PORT_BIT(0x00000008, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)3) PORT_CODE(KEYCODE_LEFT) PORT_CHAR(UCHAR_MAMEKEY(LEFT)) // 63
+ PORT_BIT(0x00000010, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)3) PORT_CODE(KEYCODE_DOWN) PORT_CHAR(UCHAR_MAMEKEY(DOWN)) // 64
+ PORT_BIT(0x00000020, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)3) PORT_CODE(KEYCODE_RIGHT) PORT_CHAR(UCHAR_MAMEKEY(RIGHT)) // 65
+ PORT_BIT(0x00000040, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)3) PORT_CODE(KEYCODE_A) PORT_CHAR('a') PORT_CHAR('A') // 66
+ PORT_BIT(0x00000080, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)3) PORT_CODE(KEYCODE_S) PORT_CHAR('s') PORT_CHAR('S') // 67
+ PORT_BIT(0x0000ff00, IP_ACTIVE_HIGH, IPT_UNUSED) // 48-4f
+ PORT_BIT(0x00010000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)3) PORT_CODE(KEYCODE_QUOTE) PORT_CHAR(':') PORT_CHAR('*') // 70
+ PORT_BIT(0x00020000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)3) PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13) // 71
+ PORT_BIT(0x00040000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)3) PORT_CODE(KEYCODE_BACKSLASH) PORT_CHAR('\\') PORT_CHAR('|') // 72
+ PORT_BIT(0x00080000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)3) PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ') // 73
+ PORT_BIT(0x00100000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)3) PORT_CODE(KEYCODE_Z) PORT_CHAR('z') PORT_CHAR('Z') // 74
+ PORT_BIT(0x00200000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)3) PORT_CODE(KEYCODE_X) PORT_CHAR('x') PORT_CHAR('X') // 75
+ PORT_BIT(0x00400000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)3) PORT_CODE(KEYCODE_C) PORT_CHAR('c') PORT_CHAR('C') // 76
+ PORT_BIT(0x00800000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)3) PORT_CODE(KEYCODE_V) PORT_CHAR('v') PORT_CHAR('V') // 77
+ PORT_BIT(0xff000000, IP_ACTIVE_HIGH, IPT_UNUSED) // 58-5f
+
+ PORT_START("keyboard_4")
+ PORT_BIT(0x00000001, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)4) PORT_CODE(KEYCODE_INSERT) PORT_CHAR(UCHAR_MAMEKEY(INSERT)) PORT_CHAR(UCHAR_MAMEKEY(PRTSCR)) // 80
+ PORT_BIT(0x00000002, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)4) PORT_CODE(KEYCODE_DEL) PORT_CHAR(UCHAR_MAMEKEY(DEL)) PORT_CHAR(12) // 81
+ PORT_BIT(0xfffffffc, IP_ACTIVE_HIGH, IPT_UNUSED) // 82-9f
+
+ PORT_START("keyboard_5")
+ PORT_BIT(0x00000003, IP_ACTIVE_HIGH, IPT_UNUSED) // a0-a1
+ PORT_BIT(0x00000004, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)5) PORT_CODE(KEYCODE_LCONTROL) PORT_CHAR(UCHAR_SHIFT_2) // a2
+ PORT_BIT(0x00000008, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)5) PORT_CODE(KEYCODE_LSHIFT) PORT_CHAR(UCHAR_SHIFT_1) // a3
+ PORT_BIT(0x00000010, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)5) PORT_CODE(KEYCODE_LALT) PORT_CHAR(UCHAR_MAMEKEY(CAPSLOCK)) // a4
+ PORT_BIT(0x00000020, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)5) PORT_CODE(KEYCODE_RALT) PORT_NAME("Graph") // a5
+ PORT_BIT(0x00000040, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)5) PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR(UCHAR_SHIFT_1) // a6
+ PORT_BIT(0x00000080, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHANGED(key_callback, (void *)5) PORT_CODE(KEYCODE_NUMLOCK) PORT_CHAR(UCHAR_MAMEKEY(NUMLOCK)) // a7
+ PORT_BIT(0xffffff00, IP_ACTIVE_HIGH, IPT_UNUSED) // a8-bf /* b2-b7 are the 'make' codes for the above keys */
+INPUT_PORTS_END
+
+/* item keyboard */
+/*static INPUT_PORTS_START( px4_h421a )
+ PORT_INCLUDE(px4_dips)
+ PORT_INCLUDE(tf20)
+INPUT_PORTS_END
+*/
+
+/***************************************************************************
+ PALETTE
+***************************************************************************/
+
+static PALETTE_INIT( px4 )
+{
+ palette_set_color(machine, 0, MAKE_RGB(138, 146, 148));
+ palette_set_color(machine, 1, MAKE_RGB(92, 83, 88));
+}
+
+static PALETTE_INIT( px4p )
+{
+ palette_set_color(machine, 0, MAKE_RGB(149, 157, 130));
+ palette_set_color(machine, 1, MAKE_RGB(92, 83, 88));
+}
+
+
+/***************************************************************************
+ MACHINE DRIVERS
+***************************************************************************/
+
+static const cassette_interface px4_cassette_interface =
+{
+ cassette_default_formats,
+ NULL,
+ (cassette_state)(CASSETTE_PLAY | CASSETTE_SPEAKER_ENABLED | CASSETTE_MOTOR_DISABLED),
+ NULL,
+ NULL
+};
+
+static MACHINE_CONFIG_START( px4, px4_state )
+
+ /* basic machine hardware */
+ MCFG_CPU_ADD("maincpu", Z80, XTAL_7_3728MHz / 2) /* uPD70008 */
+ MCFG_CPU_PROGRAM_MAP(px4_mem)
+ MCFG_CPU_IO_MAP(px4_io)
+
+ MCFG_MACHINE_RESET(px4)
+
+ /* video hardware */
+ MCFG_SCREEN_ADD("screen", LCD)
+ MCFG_SCREEN_REFRESH_RATE(72)
+ MCFG_SCREEN_SIZE(240, 64)
+ MCFG_SCREEN_VISIBLE_AREA(0, 239, 0, 63)
+ MCFG_SCREEN_UPDATE_STATIC(px4)
+
+ MCFG_DEFAULT_LAYOUT(layout_px4)
+
+ MCFG_PALETTE_LENGTH(2)
+ MCFG_PALETTE_INIT(px4)
+
+ MCFG_TIMER_ADD_PERIODIC("one_sec", upd7508_1sec_callback, attotime::from_seconds(1))
+ MCFG_TIMER_ADD_PERIODIC("frc", frc_tick, attotime::from_hz(XTAL_7_3728MHz / 2 / 6))
+
+ /* internal ram */
+ MCFG_RAM_ADD(RAM_TAG)
+ MCFG_RAM_DEFAULT_SIZE("64k")
+
+ /* centronics printer */
+ MCFG_CENTRONICS_PRINTER_ADD("centronics", standard_centronics)
+
+ /* external cassette */
+ MCFG_CASSETTE_ADD("extcas", px4_cassette_interface)
+
+ /* rom capsules */
+ MCFG_CARTSLOT_ADD("capsule1")
+ MCFG_CARTSLOT_NOT_MANDATORY
+ MCFG_CARTSLOT_ADD("capsule2")
+ MCFG_CARTSLOT_NOT_MANDATORY
+
+ /* tf20 floppy drive */
+ MCFG_TF20_ADD("floppy")
+MACHINE_CONFIG_END
+
+static MACHINE_CONFIG_DERIVED( px4p, px4 )
+
+ MCFG_CPU_MODIFY("maincpu")
+ MCFG_CPU_IO_MAP(px4p_io)
+
+ MCFG_MACHINE_START(px4_ramdisk)
+ MCFG_NVRAM_ADD_0FILL("nvram")
+
+ MCFG_PALETTE_INIT(px4p)
+
+ MCFG_CARTSLOT_ADD("ramdisk")
+ MCFG_CARTSLOT_NOT_MANDATORY
+MACHINE_CONFIG_END
+
+
+/***************************************************************************
+ ROM DEFINITIONS
+***************************************************************************/
+
+/* Note: We are missing "Kana OS V1.0" and "Kana OS V2.0" (Japanese version) */
+
+ROM_START( px4 )
+ ROM_REGION(0x8000, "os", 0)
+ ROM_LOAD("m25122aa_po_px4.10c", 0x0000, 0x8000, CRC(62d60dc6) SHA1(3d32ec79a317de7c84c378302e95f48d56505502))
+
+ ROM_REGION(0x1000, "slave", 0)
+ ROM_LOAD("upd7508.bin", 0x0000, 0x1000, NO_DUMP)
+
+ ROM_REGION(0x8000, "capsule1", 0)
+ ROM_CART_LOAD("capsule1", 0x0000, 0x8000, ROM_OPTIONAL)
+
+ ROM_REGION(0x8000, "capsule2", 0)
+ ROM_CART_LOAD("capsule2", 0x0000, 0x8000, ROM_OPTIONAL)
+ROM_END
+
+ROM_START( px4p )
+ ROM_REGION(0x8000, "os", 0)
+ ROM_LOAD("b0_pxa.10c", 0x0000, 0x8000, CRC(d74b9ef5) SHA1(baceee076c12f5a16f7a26000e9bc395d021c455))
+
+ ROM_REGION(0x1000, "slave", 0)
+ ROM_LOAD("upd7508.bin", 0x0000, 0x1000, NO_DUMP)
+
+ ROM_REGION(0x8000, "capsule1", 0)
+ ROM_CART_LOAD("capsule1", 0x0000, 0x8000, ROM_OPTIONAL)
+
+ ROM_REGION(0x8000, "capsule2", 0)
+ ROM_CART_LOAD("capsule2", 0x0000, 0x8000, ROM_OPTIONAL)
+
+ ROM_REGION(0x20000, "ramdisk", 0)
+ ROM_CART_LOAD("ramdisk", 0x0000, 0x20000, ROM_OPTIONAL | ROM_MIRROR)
+ROM_END
+
+
+/***************************************************************************
+ GAME DRIVERS
+***************************************************************************/
+
+/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */
+COMP( 1985, px4, 0, 0, px4, px4_h450a, px4_state, px4, "Epson", "PX-4", GAME_NO_SOUND )
+COMP( 1985, px4p, px4, 0, px4p, px4_h450a, px4_state, px4p, "Epson", "PX-4+", GAME_NO_SOUND )