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-rw-r--r--src/mame/drivers/tek405x.c1252
1 files changed, 1252 insertions, 0 deletions
diff --git a/src/mame/drivers/tek405x.c b/src/mame/drivers/tek405x.c
new file mode 100644
index 00000000000..767d5399d8d
--- /dev/null
+++ b/src/mame/drivers/tek405x.c
@@ -0,0 +1,1252 @@
+// license:BSD-3-Clause
+// copyright-holders:Curt Coder
+/***************************************************************************
+
+ Tektronix 4051/4052A
+
+ Skeleton driver.
+
+ http://www.electronixandmore.com/articles/teksystem.html
+
+****************************************************************************/
+
+/*
+
+ TODO:
+
+ - bank switch
+ - keyboard
+ - video (persistent vector display)
+ - joystick
+ - magnetic tape storage (3M 300)
+ - communications backpack
+ - 4051E01 ROM expander
+
+*/
+
+
+#include "includes/tek405x.h"
+
+
+//**************************************************************************
+// MACROS / CONSTANTS
+//**************************************************************************
+
+enum {
+ LBS_RBC = 0, // ROM Bank Control
+ LBS_BSOFL, // Bank Switch Overflow (Select Overflow ROMs)
+ LBS_BSCOM, // Bank Switch Communication (Select Communication ROMs)
+ LBS_INVALID,
+ LBS_BS_L, // Bank Switch Left (Select Left ROM Pack)
+ LBS_BS_R, // Bank Switch Right (Select Right ROM Pack)
+ LBS_BSX_L, // Bank Switch Expander (Select Left ROM Expander Unit)
+ LBS_BSX_R // Bank Switch Expander (Select Right ROM Expander Unit)
+};
+
+
+
+//**************************************************************************
+// INTERRUPTS
+//**************************************************************************
+
+//-------------------------------------------------
+// update_irq -
+//-------------------------------------------------
+
+void tek4051_state::update_irq()
+{
+ int state = m_kb_pia_irqa | m_kb_pia_irqb | m_x_pia_irqa | m_x_pia_irqb | m_gpib_pia_irqa | m_gpib_pia_irqb | m_com_pia_irqa | m_com_pia_irqb | m_acia_irq;
+
+ m_maincpu->set_input_line(INPUT_LINE_IRQ0, state);
+}
+
+
+//-------------------------------------------------
+// update_nmi -
+//-------------------------------------------------
+
+void tek4051_state::update_nmi()
+{
+ int state = m_y_pia_irqa | m_y_pia_irqb | m_tape_pia_irqa | m_tape_pia_irqb;
+
+ m_maincpu->set_input_line(INPUT_LINE_NMI, state);
+}
+
+
+
+//**************************************************************************
+// KEYBOARD
+//**************************************************************************
+
+//-------------------------------------------------
+// scan_keyboard - scan keyboard
+//-------------------------------------------------
+
+void tek4051_state::scan_keyboard()
+{
+}
+
+
+//-------------------------------------------------
+// TIMER_DEVICE_CALLBACK_MEMBER( keyboard_tick )
+//-------------------------------------------------
+
+TIMER_DEVICE_CALLBACK_MEMBER(tek4051_state::keyboard_tick)
+{
+ scan_keyboard();
+}
+
+
+
+//**************************************************************************
+// MEMORY BANKING
+//**************************************************************************
+
+//-------------------------------------------------
+// bankswitch -
+//-------------------------------------------------
+
+void tek4051_state::bankswitch(UINT8 data)
+{
+ address_space &program = m_maincpu->space(AS_PROGRAM);
+
+ //int d = data & 0x07;
+ int lbs = (data >> 3) & 0x07;
+
+ switch (lbs)
+ {
+ case LBS_RBC:
+ program.install_rom(0x8800, 0xa7ff, m_rom->base() + 0x800);
+ break;
+
+ case LBS_BSOFL:
+ program.install_rom(0x8800, 0xa7ff, m_bsofl_rom->base());
+ break;
+
+ case LBS_BSCOM:
+ program.install_rom(0x8800, 0xa7ff, m_bscom_rom->base());
+ break;
+
+ default:
+ program.unmap_readwrite(0x8800, 0xa7ff);
+ }
+}
+
+
+WRITE8_MEMBER( tek4051_state::lbs_w )
+{
+ /*
+
+ bit description
+
+ 0 ROM Expander Slot Address
+ 1 ROM Expander Slot Address
+ 2 ROM Expander Slot Address
+ 3 Bank Switch
+ 4 Bank Switch
+ 5 Bank Switch
+ 6
+ 7
+
+ */
+
+ logerror("LBS %02x\n", data);
+
+ bankswitch(data);
+}
+
+
+
+//**************************************************************************
+// ADDRESS MAPS
+//**************************************************************************
+
+//-------------------------------------------------
+// ADDRESS_MAP( tek4051_mem )
+//-------------------------------------------------
+
+static ADDRESS_MAP_START( tek4051_mem, AS_PROGRAM, 8, tek4051_state )
+ AM_RANGE(0x0000, 0x1fff) AM_RAM
+ AM_RANGE(0x2000, 0x7fff) AM_RAM // optional RAM
+ AM_RANGE(0x8000, 0x877f) AM_ROM AM_REGION(MC6800_TAG, 0)
+ AM_RANGE(0x878c, 0x878f) AM_DEVREADWRITE(MC6820_Y_TAG, pia6821_device, read, write)
+ AM_RANGE(0x8794, 0x8797) AM_DEVREADWRITE(MC6820_X_TAG, pia6821_device, read, write)
+ AM_RANGE(0x8798, 0x879b) AM_DEVREADWRITE(MC6820_TAPE_TAG, pia6821_device, read, write)
+ AM_RANGE(0x87a8, 0x87ab) AM_DEVREADWRITE(MC6820_KB_TAG, pia6821_device, read, write)
+ AM_RANGE(0x87b0, 0x87b3) AM_DEVREADWRITE(MC6820_GPIB_TAG, pia6821_device, read, write)
+ AM_RANGE(0x87c0, 0x87c0) AM_MIRROR(0x03) AM_WRITE(lbs_w)
+// AM_RANGE(0x87c0, 0x87c3) AM_DEVREADWRITE(MC6820_COM_TAG, pia6821_device, read, write)
+// AM_RANGE(0x87c4, 0x87c4) AM_MIRROR(0x02) AM_DEVREADWRITE(MC6850_TAG, acia6850_device, status_r, control_w)
+// AM_RANGE(0x87c5, 0x87c5) AM_MIRROR(0x02) AM_DEVREADWRITE(MC6850_TAG, acia6850_device, data_r, data_w)
+// AM_RANGE(0x87c8, 0x87cb) XPC2
+// AM_RANGE(0x87cc, 0x87cf) XPC3
+// AM_RANGE(0x87d0, 0x87d3) XPC4
+ AM_RANGE(0x8800, 0xa7ff) AM_ROM AM_REGION(MC6800_TAG, 0x800)
+ AM_RANGE(0xa800, 0xffff) AM_ROM AM_REGION(MC6800_TAG, 0x2800)
+ADDRESS_MAP_END
+
+
+//-------------------------------------------------
+// ADDRESS_MAP( tek4052_mem )
+//-------------------------------------------------
+
+static ADDRESS_MAP_START( tek4052_mem, AS_PROGRAM, 8, tek4052_state )
+ADDRESS_MAP_END
+
+
+
+//**************************************************************************
+// INPUT PORTS
+//**************************************************************************
+
+//-------------------------------------------------
+// INPUT_PORTS( tek4051 )
+//-------------------------------------------------
+
+static INPUT_PORTS_START( tek4051 )
+ PORT_START("Y0")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD )
+
+ PORT_START("Y1")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD )
+
+ PORT_START("Y2")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD )
+
+ PORT_START("Y3")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD )
+
+ PORT_START("Y4")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD )
+
+ PORT_START("Y5")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD )
+
+ PORT_START("Y6")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD )
+
+ PORT_START("Y7")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD )
+
+ PORT_START("Y8")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD )
+
+ PORT_START("Y9")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD )
+
+ PORT_START("Y10")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD )
+
+ PORT_START("Y11")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD )
+
+ PORT_START("Y12")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD )
+
+ PORT_START("Y13")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD )
+
+ PORT_START("Y14")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD )
+
+ PORT_START("Y15")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD )
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD )
+
+ PORT_START("SPECIAL")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Left SHIFT") PORT_CODE(KEYCODE_LSHIFT) PORT_CHAR(UCHAR_SHIFT_1)
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Right SHIFT") PORT_CODE(KEYCODE_RSHIFT)
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("CTRL") PORT_CODE(KEYCODE_LCONTROL) PORT_CHAR(UCHAR_MAMEKEY(LCONTROL))
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("TTY LOCK") PORT_CODE(KEYCODE_CAPSLOCK) PORT_CHAR(UCHAR_MAMEKEY(CAPSLOCK))
+INPUT_PORTS_END
+
+
+
+//**************************************************************************
+// VIDEO
+//**************************************************************************
+
+void tek4051_state::video_start()
+{
+}
+
+
+void tek4052_state::video_start()
+{
+}
+
+
+
+//**************************************************************************
+// DEVICE CONFIGURATION
+//**************************************************************************
+
+READ8_MEMBER( tek4051_state::x_pia_pa_r )
+{
+ /*
+
+ bit description
+
+ PA0
+ PA1
+ PA2 DRBUSY-0
+ PA3 VPULSE-1
+ PA4
+ PA5
+ PA6
+ PA7
+
+ */
+
+ return 0;
+}
+
+WRITE8_MEMBER( tek4051_state::x_pia_pa_w )
+{
+ /*
+
+ bit description
+
+ PA0 X D/A
+ PA1 X D/A
+ PA2
+ PA3
+ PA4 ERASE-0
+ PA5 COPY-0
+ PA6 VECTOR-0
+ PA7 VEN-1
+
+ */
+}
+
+WRITE8_MEMBER( tek4051_state::x_pia_pb_w )
+{
+ /*
+
+ bit description
+
+ PB0 X D/A
+ PB1 X D/A
+ PB2 X D/A
+ PB3 X D/A
+ PB4 X D/A
+ PB5 X D/A
+ PB6 X D/A
+ PB7 X D/A
+
+ */
+}
+
+WRITE_LINE_MEMBER( tek4051_state::adot_w )
+{
+}
+
+WRITE_LINE_MEMBER( tek4051_state::bufclk_w )
+{
+}
+
+WRITE_LINE_MEMBER( tek4051_state::x_pia_irqa_w )
+{
+ m_x_pia_irqa = state;
+ update_irq();
+}
+
+WRITE_LINE_MEMBER( tek4051_state::x_pia_irqb_w )
+{
+ m_x_pia_irqb = state;
+ update_irq();
+}
+
+READ8_MEMBER( tek4051_state::sa_r )
+{
+ /*
+
+ bit description
+
+ PA0 SA0
+ PA1 SA1
+ PA2 SA2
+ PA3 SA3
+ PA4 SA4
+ PA5 SA5
+ PA6 SA6
+ PA7 SA7
+
+ */
+
+ return 0;
+}
+
+WRITE8_MEMBER( tek4051_state::y_pia_pa_w )
+{
+ /*
+
+ bit description
+
+ PA0 Y D/A
+ PA1 Y D/A
+ PA2 Y CHAR D/A
+ PA3 Y CHAR D/A
+ PA4 Y CHAR D/A
+ PA5 X CHAR D/A
+ PA6 X CHAR D/A
+ PA7 X CHAR D/A
+
+ */
+}
+
+WRITE8_MEMBER( tek4051_state::sb_w )
+{
+ /*
+
+ bit description
+
+ PB0 SB0
+ PB1 SB1
+ PB2 SB2
+ PB3 SB3
+ PB4 SB4
+ PB5 SB5
+ PB6 SB6
+ PB7 SB7
+
+ */
+}
+
+WRITE_LINE_MEMBER( tek4051_state::sot_w )
+{
+}
+
+WRITE_LINE_MEMBER( tek4051_state::y_pia_irqa_w )
+{
+ m_y_pia_irqa = state;
+ update_nmi();
+}
+
+WRITE_LINE_MEMBER( tek4051_state::y_pia_irqb_w )
+{
+ m_y_pia_irqb = state;
+ update_nmi();
+}
+
+
+READ8_MEMBER( tek4051_state::kb_pia_pa_r )
+{
+ /*
+
+ bit description
+
+ PA0 KC0-1
+ PA1 KC1-1
+ PA2 KC2-1
+ PA3 KC3-1
+ PA4 KC4-1
+ PA5 KC5-1
+ PA6 KC6-1
+ PA7 TTY-0
+
+ */
+
+ UINT8 data = 0;
+ UINT8 special = m_special->read();
+
+ // keyboard column
+ data = m_kc;
+
+ // TTY lock
+ data |= BIT(special, 3) << 7;
+
+ return data;
+}
+
+READ8_MEMBER( tek4051_state::kb_pia_pb_r )
+{
+ /*
+
+ bit description
+
+ PB0 SHIFT-0
+ PB1 CTRL-0
+ PB2
+ PB3 LOAD-0
+ PB4
+ PB5
+ PB6
+ PB7
+
+ */
+
+ UINT8 data = 0;
+ UINT8 special = m_special->read();
+
+ // shift
+ data |= (BIT(special, 0) & BIT(special, 1));
+
+ // ctrl
+ data |= BIT(special, 2) << 1;
+
+ return data;
+}
+
+WRITE8_MEMBER( tek4051_state::kb_pia_pb_w )
+{
+ /*
+
+ bit description
+
+ PB0
+ PB1
+ PB2
+ PB3
+ PB4 EOI-1
+ PB5 BREAK-1
+ PB6 I/O-1
+ PB7 BUSY-1/REN-0/SPEAKER
+
+ */
+
+ // lamps
+ output_set_led_value(1, !BIT(data, 5));
+ output_set_led_value(2, !BIT(data, 6));
+ output_set_led_value(3, !BIT(data, 7));
+
+ // end or identify
+ m_gpib->eoi_w(!BIT(data, 4));
+
+ // speaker
+ m_speaker->level_w(!BIT(data, 7));
+
+ // remote enable
+ m_gpib->ren_w(!BIT(data, 7));
+}
+
+WRITE_LINE_MEMBER( tek4051_state::kb_halt_w )
+{
+}
+
+WRITE_LINE_MEMBER( tek4051_state::kb_pia_irqa_w )
+{
+ m_kb_pia_irqa = state;
+ update_irq();
+}
+
+WRITE_LINE_MEMBER( tek4051_state::kb_pia_irqb_w )
+{
+ m_kb_pia_irqb = state;
+ update_irq();
+}
+
+
+READ8_MEMBER( tek4051_state::tape_pia_pa_r )
+{
+ /*
+
+ bit description
+
+ PA0 DELAY OUT-1
+ PA1
+ PA2 TUTS-1
+ PA3 SAFE-1
+ PA4 SAFE-1
+ PA5 JOYSTICK
+ PA6 FILFND-1
+ PA7 JOYSTICK
+
+ */
+
+ return 0;
+}
+
+WRITE8_MEMBER( tek4051_state::tape_pia_pa_w )
+{
+ /*
+
+ bit description
+
+ PA0
+ PA1 LDCLK-1
+ PA2
+ PA3
+ PA4
+ PA5 XERR-1
+ PA6
+ PA7 YERR-1
+
+ */
+}
+
+WRITE8_MEMBER( tek4051_state::tape_pia_pb_w )
+{
+ /*
+
+ bit description
+
+ PB0 WR-0
+ PB1 FAST-1
+ PB2 REV-1
+ PB3 DRTAPE-0
+ PB4 GICG-1
+ PB5 FICG-1
+ PB6 WENABLE-1
+ PB7 FSENABLE-0
+
+ */
+}
+
+WRITE_LINE_MEMBER( tek4051_state::tape_pia_irqa_w )
+{
+ m_tape_pia_irqa = state;
+ update_nmi();
+}
+
+WRITE_LINE_MEMBER( tek4051_state::tape_pia_irqb_w )
+{
+ m_tape_pia_irqb = state;
+ update_nmi();
+}
+
+
+WRITE8_MEMBER( tek4051_state::dio_w )
+{
+ /*
+
+ bit description
+
+ PA0 DIO1-1
+ PA1 DIO2-1
+ PA2 DIO3-1
+ PA3 DIO4-1
+ PA4 DIO5-1
+ PA5 DIO6-1
+ PA6 DIO7-1
+ PA7 DIO8-1
+
+ */
+
+ if (m_talk)
+ {
+ m_gpib->dio_w(data);
+ }
+}
+
+READ8_MEMBER( tek4051_state::gpib_pia_pb_r )
+{
+ /*
+
+ bit description
+
+ PB0
+ PB1
+ PB2
+ PB3
+ PB4 NRFD
+ PB5 SRQ-1
+ PB6 DAV-1
+ PB7 NDAC
+
+ */
+
+ UINT8 data = 0;
+
+ // service request
+ data |= m_gpib->srq_r() << 5;
+
+ // data valid
+ data |= m_gpib->dav_r() << 6;
+
+ if (!m_talk)
+ {
+ // not ready for data
+ data |= m_gpib->nrfd_r() << 4;
+
+ // not data acknowledged
+ data |= m_gpib->ndac_r() << 7;
+ }
+
+ return data;
+}
+
+WRITE8_MEMBER( tek4051_state::gpib_pia_pb_w )
+{
+ /*
+
+ bit description
+
+ PB0 EOI-1
+ PB1 IFC-1
+ PB2
+ PB3 ATN-0
+ PB4 NRFD
+ PB5
+ PB6
+ PB7 NDAC
+
+ */
+
+ // end or identify
+ m_gpib->eoi_w(!BIT(data, 0));
+
+ // interface clear
+ m_gpib->ifc_w(!BIT(data, 1));
+
+ // attention
+ m_gpib->atn_w(BIT(data, 3));
+
+ if (m_talk)
+ {
+ // not ready for data
+ m_gpib->nrfd_w(!BIT(data, 4));
+
+ // not data acknowledged
+ m_gpib->ndac_w(!BIT(data, 7));
+ }
+}
+
+WRITE_LINE_MEMBER( tek4051_state::talk_w )
+{
+ m_talk = state;
+
+ if (!m_talk)
+ {
+ m_gpib->dio_w(0xff);
+ m_gpib->nrfd_w(1);
+ m_gpib->ndac_w(1);
+ }
+}
+
+WRITE_LINE_MEMBER( tek4051_state::gpib_pia_irqa_w )
+{
+ m_gpib_pia_irqa = state;
+ update_irq();
+}
+
+WRITE_LINE_MEMBER( tek4051_state::gpib_pia_irqb_w )
+{
+ m_gpib_pia_irqb = state;
+ update_irq();
+}
+
+
+WRITE8_MEMBER( tek4051_state::com_pia_pa_w )
+{
+ /*
+
+ bit description
+
+ PA0
+ PA1
+ PA2
+ PA3 Bank Switch Register
+ PA4 Bank Switch Register
+ PA5 Bank Switch Register
+ PA6
+ PA7
+
+ */
+
+ bankswitch(data);
+}
+
+READ8_MEMBER( tek4051_state::com_pia_pb_r )
+{
+ /*
+
+ bit description
+
+ PB0 SRX
+ PB1 DTR
+ PB2 RTS
+ PB3
+ PB4
+ PB5
+ PB6
+ PB7
+
+ */
+
+ UINT8 data = 0;
+
+ // data terminal ready
+
+ // request to send
+
+ return data;
+}
+
+WRITE8_MEMBER( tek4051_state::com_pia_pb_w )
+{
+ /*
+
+ bit description
+
+ PB0
+ PB1
+ PB2
+ PB3 CTS
+ PB4 STXA-C
+ PB5 Baud Rate Select
+ PB6 Baud Rate Select
+ PB7 Baud Rate Select
+
+ */
+
+ // clear to send
+
+ // baud rate select
+ int osc = BIT(data, 7) ? 28160 : 38400;
+ int div = 1;
+
+ switch ((data >> 5) & 0x03)
+ {
+ case 2: div = 4; break;
+ case 3: div = 2; break;
+ }
+
+ m_acia_clock->set_unscaled_clock(osc);
+ m_acia_clock->set_clock_scale((double) 1 / div);
+}
+
+WRITE_LINE_MEMBER( tek4051_state::com_pia_irqa_w )
+{
+ m_com_pia_irqa = state;
+ update_irq();
+}
+
+WRITE_LINE_MEMBER( tek4051_state::com_pia_irqb_w )
+{
+ m_com_pia_irqb = state;
+ update_irq();
+}
+
+
+WRITE_LINE_MEMBER( tek4051_state::acia_irq_w )
+{
+ m_acia_irq = state;
+ update_irq();
+}
+
+WRITE_LINE_MEMBER( tek4051_state::write_acia_clock )
+{
+ m_acia->write_txc(state);
+ m_acia->write_rxc(state);
+}
+
+
+//**************************************************************************
+// MACHINE INITIALIZATION
+//**************************************************************************
+
+//-------------------------------------------------
+// MACHINE_START( tek4051 )
+//-------------------------------------------------
+
+void tek4051_state::machine_start()
+{
+ address_space &program = m_maincpu->space(AS_PROGRAM);
+
+ // configure RAM
+ switch (m_ram->size())
+ {
+ case 8*1024:
+ program.unmap_readwrite(0x2000, 0x7fff);
+ break;
+
+ case 16*1024:
+ program.unmap_readwrite(0x4000, 0x7fff);
+ break;
+
+ case 24*1024:
+ program.unmap_readwrite(0x6000, 0x7fff);
+ break;
+ }
+
+ // register for state saving
+}
+
+
+//-------------------------------------------------
+// MACHINE_START( tek4052 )
+//-------------------------------------------------
+
+void tek4052_state::machine_start()
+{
+}
+
+
+
+//**************************************************************************
+// MACHINE CONFIGURATION
+//**************************************************************************
+
+//-------------------------------------------------
+// MACHINE_CONFIG( tek4051 )
+//-------------------------------------------------
+
+static MACHINE_CONFIG_START( tek4051, tek4051_state )
+ // basic machine hardware
+ MCFG_CPU_ADD(MC6800_TAG, M6800, XTAL_12_5MHz/15)
+ MCFG_CPU_PROGRAM_MAP(tek4051_mem)
+
+ // video hardware
+ MCFG_VECTOR_ADD("vector")
+ MCFG_SCREEN_ADD(SCREEN_TAG, VECTOR)
+ MCFG_SCREEN_REFRESH_RATE(50)
+ MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) // not accurate
+ MCFG_SCREEN_SIZE(1024, 780)
+ MCFG_SCREEN_VISIBLE_AREA(0, 1024-1, 0, 780-1)
+ MCFG_SCREEN_UPDATE_DEVICE("vector", vector_device, screen_update)
+
+ MCFG_PALETTE_ADD_MONOCHROME_GREEN("palette")
+
+ // sound hardware
+ MCFG_SPEAKER_STANDARD_MONO("mono")
+ MCFG_SOUND_ADD("speaker", SPEAKER_SOUND, 0)
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)
+
+ // devices
+ MCFG_TIMER_DRIVER_ADD_PERIODIC("keyboard", tek4051_state, keyboard_tick, attotime::from_hz(XTAL_12_5MHz/15/4))
+
+ MCFG_DEVICE_ADD(MC6820_X_TAG, PIA6821, 0)
+ MCFG_PIA_READPA_HANDLER(READ8(tek4051_state, x_pia_pa_r))
+ // CB1 viewcause
+ MCFG_PIA_WRITEPA_HANDLER(WRITE8(tek4051_state, x_pia_pa_w))
+ MCFG_PIA_WRITEPB_HANDLER(WRITE8(tek4051_state, x_pia_pb_w))
+ MCFG_PIA_CA2_HANDLER(WRITELINE(tek4051_state, adot_w))
+ MCFG_PIA_CB2_HANDLER(WRITELINE(tek4051_state, bufclk_w))
+ MCFG_PIA_IRQA_HANDLER(WRITELINE(tek4051_state, x_pia_irqa_w))
+ MCFG_PIA_IRQB_HANDLER(WRITELINE(tek4051_state, x_pia_irqb_w))
+
+ MCFG_DEVICE_ADD(MC6820_Y_TAG, PIA6821, 0)
+ MCFG_PIA_READPA_HANDLER(READ8(tek4051_state, sa_r))
+ // CA1 rdbyte
+ // CB1 mdata
+ // CB2 fmark
+ MCFG_PIA_WRITEPA_HANDLER(WRITE8(tek4051_state, y_pia_pa_w))
+ MCFG_PIA_WRITEPB_HANDLER(WRITE8(tek4051_state, sb_w))
+ MCFG_PIA_CA2_HANDLER(WRITELINE(tek4051_state, sot_w))
+ MCFG_PIA_IRQA_HANDLER(WRITELINE(tek4051_state, y_pia_irqa_w))
+ MCFG_PIA_IRQB_HANDLER(WRITELINE(tek4051_state, y_pia_irqb_w))
+
+ MCFG_DEVICE_ADD(MC6820_KB_TAG, PIA6821, 0)
+ MCFG_PIA_READPA_HANDLER(READ8(tek4051_state, kb_pia_pa_r))
+ MCFG_PIA_READPB_HANDLER(READ8(tek4051_state, kb_pia_pb_r))
+ // CA1 key
+ MCFG_PIA_WRITEPB_HANDLER(WRITE8(tek4051_state, kb_pia_pb_w))
+ MCFG_PIA_CA2_HANDLER(WRITELINE(tek4051_state, kb_halt_w))
+ MCFG_PIA_IRQA_HANDLER(WRITELINE(tek4051_state, kb_pia_irqa_w))
+ MCFG_PIA_IRQB_HANDLER(WRITELINE(tek4051_state, kb_pia_irqb_w))
+
+ MCFG_DEVICE_ADD(MC6820_TAPE_TAG, PIA6821, 0)
+ MCFG_PIA_READPA_HANDLER(READ8(tek4051_state, tape_pia_pa_r))
+ // CA1 rmark
+ // CB1 lohole
+ // CA2 filfnd
+ // CB2 uphole
+ MCFG_PIA_WRITEPA_HANDLER(WRITE8(tek4051_state, tape_pia_pa_w))
+ MCFG_PIA_WRITEPB_HANDLER(WRITE8(tek4051_state, tape_pia_pb_w))
+ MCFG_PIA_IRQA_HANDLER(WRITELINE(tek4051_state, tape_pia_irqa_w))
+ MCFG_PIA_IRQB_HANDLER(WRITELINE(tek4051_state, tape_pia_irqb_w))
+
+ MCFG_DEVICE_ADD(MC6820_GPIB_TAG, PIA6821, 0)
+ MCFG_PIA_READPA_HANDLER(DEVREAD8(IEEE488_TAG, ieee488_device, dio_r))
+ MCFG_PIA_READPB_HANDLER(READ8(tek4051_state, gpib_pia_pb_r))
+ MCFG_PIA_WRITEPA_HANDLER(WRITE8(tek4051_state, dio_w))
+ MCFG_PIA_WRITEPB_HANDLER(WRITE8(tek4051_state, gpib_pia_pb_w))
+ MCFG_PIA_CB2_HANDLER(WRITELINE(tek4051_state, talk_w))
+ MCFG_PIA_IRQA_HANDLER(WRITELINE(tek4051_state, gpib_pia_irqa_w))
+ MCFG_PIA_IRQB_HANDLER(WRITELINE(tek4051_state, gpib_pia_irqb_w))
+
+ MCFG_DEVICE_ADD(MC6820_COM_TAG, PIA6821, 0)
+ MCFG_PIA_READPB_HANDLER(READ8(tek4051_state, com_pia_pb_r))
+ //CA1 - SRX (RS-232 pin 12)
+ MCFG_PIA_WRITEPA_HANDLER(WRITE8(tek4051_state, com_pia_pa_w))
+ MCFG_PIA_WRITEPB_HANDLER(WRITE8(tek4051_state, com_pia_pb_w))
+ MCFG_PIA_IRQA_HANDLER(WRITELINE(tek4051_state, com_pia_irqa_w))
+ MCFG_PIA_IRQB_HANDLER(WRITELINE(tek4051_state, com_pia_irqb_w))
+
+ MCFG_DEVICE_ADD(MC6850_TAG, ACIA6850, 0)
+ MCFG_ACIA6850_IRQ_HANDLER(WRITELINE(tek4051_state, acia_irq_w))
+
+ MCFG_DEVICE_ADD("acia_clock", CLOCK, 38400)
+ MCFG_CLOCK_SIGNAL_HANDLER(WRITELINE(tek4051_state, write_acia_clock))
+
+ MCFG_IEEE488_BUS_ADD()
+ MCFG_IEEE488_EOI_CALLBACK(DEVWRITELINE(MC6820_GPIB_TAG, pia6821_device, ca1_w))
+ MCFG_IEEE488_SRQ_CALLBACK(DEVWRITELINE(MC6820_GPIB_TAG, pia6821_device, cb1_w))
+
+ // internal ram
+ MCFG_RAM_ADD(RAM_TAG)
+ MCFG_RAM_DEFAULT_SIZE("8K")
+ MCFG_RAM_EXTRA_OPTIONS("16K,24K,32K")
+
+ // cartridge
+ MCFG_GENERIC_CARTSLOT_ADD("cartslot1", generic_plain_slot, "tek4050_cart")
+ MCFG_GENERIC_CARTSLOT_ADD("cartslot2", generic_plain_slot, "tek4050_cart")
+MACHINE_CONFIG_END
+
+
+//-------------------------------------------------
+// MACHINE_CONFIG( tek4052 )
+//-------------------------------------------------
+
+static MACHINE_CONFIG_START( tek4052, tek4052_state )
+ // basic machine hardware
+ MCFG_CPU_ADD(AM2901A_TAG, M6800, 1000000) // should be 4x AM2901A + AM2911
+ MCFG_CPU_PROGRAM_MAP(tek4052_mem)
+
+ // video hardware
+ MCFG_VECTOR_ADD("vector")
+ MCFG_SCREEN_ADD(SCREEN_TAG, VECTOR)
+ MCFG_SCREEN_REFRESH_RATE(50)
+ MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) // not accurate
+ MCFG_SCREEN_SIZE(1024, 780)
+ MCFG_SCREEN_VISIBLE_AREA(0, 1024-1, 0, 780-1)
+ MCFG_SCREEN_UPDATE_DEVICE("vector", vector_device, screen_update)
+
+ MCFG_PALETTE_ADD_MONOCHROME_GREEN("palette")
+
+ // sound hardware
+ MCFG_SPEAKER_STANDARD_MONO("mono")
+ MCFG_SOUND_ADD("speaker", SPEAKER_SOUND, 0)
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)
+
+ // internal ram
+ MCFG_RAM_ADD(RAM_TAG)
+ MCFG_RAM_DEFAULT_SIZE("32K")
+ MCFG_RAM_EXTRA_OPTIONS("64K")
+
+ // cartridge
+ MCFG_GENERIC_CARTSLOT_ADD("cartslot1", generic_plain_slot, "tek4050_cart")
+ MCFG_GENERIC_CARTSLOT_ADD("cartslot2", generic_plain_slot, "tek4050_cart")
+
+ // software lists
+ MCFG_SOFTWARE_LIST_ADD("cart_list", "tek4052_cart")
+MACHINE_CONFIG_END
+
+
+//-------------------------------------------------
+// MACHINE_CONFIG( tek4054 )
+//-------------------------------------------------
+/*
+static MACHINE_CONFIG_START( tek4054, tek4052_state )
+ MCFG_SCREEN_SIZE(4096, 3125)
+ MCFG_SCREEN_VISIBLE_AREA(0, 4096-1, 0, 3125-1)
+MACHINE_CONFIG_END
+*/
+
+
+
+//**************************************************************************
+// ROMS
+//**************************************************************************
+
+//-------------------------------------------------
+// ROM( tek4051 )
+//-------------------------------------------------
+
+ROM_START( tek4051 )
+ ROM_REGION( 0x8000, MC6800_TAG, 0 )
+ ROM_LOAD( "156-0659-xx.u585", 0x0000, 0x0800, CRC(0017ba54) SHA1(533bfacb2e698c1df88a00acce6df6a8c536239d) ) // -01 or -02 ?
+ ROM_LOAD( "156-0660-01.u581", 0x0800, 0x0800, CRC(c4e302e8) SHA1(a0438cbc70ddc1bab000e30c0f835f0948aae969) )
+ ROM_LOAD( "156-0661-01.u487", 0x1000, 0x0800, CRC(edb097c8) SHA1(a07b777b6b20de496089730db8097b65b9a8ef31) )
+ ROM_LOAD( "156-0662-01.u485", 0x1800, 0x0800, CRC(0a3af548) SHA1(01bcffa7d55b2585348ea96852b4319c6454d19a) )
+ ROM_LOAD( "156-0663-01.u481", 0x2000, 0x0800, CRC(f220d24c) SHA1(fb5dc8a617f4b4d5c094c0cbabb9af158c19c2c2) )
+ ROM_LOAD( "156-0664-xx.u385", 0x2800, 0x0800, CRC(aa1ae67d) SHA1(8816654c1b0ad0230bf5027f68c2ec1d315ad188) ) // -01 or -02 ?
+ ROM_LOAD( "156-0665-xx.u381", 0x3000, 0x0800, CRC(90497138) SHA1(2d6bbe169a434581a49fffcab0d2ca18107b67da) ) // -01 or -02 ?
+ ROM_LOAD( "156-0666-01.u285", 0x3800, 0x0800, CRC(c35ce405) SHA1(10cae122d000fe2886228a178a1a4e4d3ec2c3f5) )
+ ROM_LOAD( "156-0667-xx.u595", 0x4000, 0x0800, CRC(e1723a06) SHA1(dde3e64eb6acc77d8e7234235a99ec338cc74717) ) // -01 or -02 ?
+ ROM_LOAD( "156-0668-xx.u591", 0x4800, 0x0800, CRC(d8b80d7a) SHA1(6c1f00fa2f9ff6ebd84268c2100637ddbdb3bae6) ) // -01 or -02 ?
+ ROM_LOAD( "156-0669-01.u497", 0x5000, 0x0800, CRC(f760ed39) SHA1(2b30d20d880002ce3950ee7abe40f4e1539208cc) )
+ ROM_LOAD( "156-0670-01.u495", 0x5800, 0x0800, CRC(d40a303d) SHA1(111b399f6178e2fe50b1368536f290d4df9883fc) )
+ ROM_LOAD( "156-0671-xx.u491", 0x6000, 0x0800, CRC(32060b64) SHA1(af254dc068686fcd7584128258724fd5415ea458) ) // -01 or -02 ?
+ ROM_LOAD( "156-0672-xx.u395", 0x6800, 0x0800, CRC(93ad68d1) SHA1(8242058bfc89d11cd9ae82d967410714875eface) ) // -01 or -02 ?
+ ROM_LOAD( "156-0673-xx.u391", 0x7000, 0x0800, CRC(ee1f5d4c) SHA1(a6fb8347a0dfa94268f091fb7ca091c8bfabeabd) ) // -01 or -02 or -03 ?
+ ROM_LOAD( "156-0674-xx.u295", 0x7800, 0x0800, CRC(50582341) SHA1(1a028176e5d5ca83012e2f75e9daad88cd7d8fc3) ) // -01 or -02 ?
+
+ ROM_REGION( 0x2000, "020_0147_00", 0 ) // Firmware Backpack (020-0147-00)
+ ROM_LOAD( "156-0747-xx.u101", 0x0000, 0x0800, CRC(9e1facc1) SHA1(7e7a118c3e8c49630f630ee02c3de843dd95d7e1) ) // -00 or -01 ?
+ ROM_LOAD( "156-0748-xx.u201", 0x0800, 0x0800, CRC(be42bfbf) SHA1(23575b411bd9dcb7d7116628820096e3064ff93b) ) // -00 or -01 ?
+
+ ROM_REGION( 0x2000, "021_0188_00", 0 ) // Communications Backpack (021-0188-00)
+ ROM_LOAD( "156-0712-00.u101", 0x0000, 0x0800, NO_DUMP )
+ ROM_LOAD( "156-0712-01.u101", 0x0000, 0x0800, NO_DUMP )
+ ROM_LOAD( "156-0713-00.u111", 0x0800, 0x0800, NO_DUMP )
+ ROM_LOAD( "156-0713-01.u111", 0x0800, 0x0800, NO_DUMP )
+ ROM_LOAD( "156-0714-00.u121", 0x1000, 0x0800, NO_DUMP )
+ ROM_LOAD( "156-0714-01.u121", 0x1000, 0x0800, NO_DUMP )
+ ROM_LOAD( "156-0715-01.u131", 0x1800, 0x0800, NO_DUMP )
+/*
+ ROM_REGION( 0x2000, "4051r01", 0 ) // 4051R01 Matrix Functions
+ ROM_LOAD( "4051r01", 0x0000, 0x1000, NO_DUMP )
+
+ ROM_REGION( 0x2000, "4051r05", 0 ) // 4051R05 Binary Program Loader
+ ROM_LOAD( "156-0856-00.u1", 0x0000, 0x0800, NO_DUMP )
+ ROM_LOAD( "156-0857-00.u11", 0x0800, 0x0800, NO_DUMP )
+
+ ROM_REGION( 0x2000, "4051r06", 0 ) // 4051R06 Editor
+ ROM_LOAD( "4051r06", 0x0000, 0x1000, NO_DUMP )
+*/
+ROM_END
+
+
+//-------------------------------------------------
+// ROM( tek4052a )
+//-------------------------------------------------
+
+ROM_START( tek4052a )
+ ROM_REGION( 0x3800, AM2901A_TAG, 0 ) // ALU 670-7705-00 microcode
+ ROM_LOAD( "160-1689-00.u340", 0x0000, 0x0800, CRC(97ff62d4) SHA1(e25b495fd1b3f8a5bfef5c8f20efacde8366e89c) )
+ ROM_LOAD( "160-1688-00.u335", 0x0800, 0x0800, CRC(19033422) SHA1(0f6ea45be5123701940331c4278bcdc5db4f4147) )
+ ROM_LOAD( "160-1687-00.u330", 0x1000, 0x0800, CRC(3b2e37dd) SHA1(294b626d0022fbf9bec50680b6b932f21a3cb049) )
+ ROM_LOAD( "160-1686-00.u320", 0x1800, 0x0800, CRC(7916cd64) SHA1(d6b3ed783e488667ca203ec605aa27d78261c61b) )
+ ROM_LOAD( "160-1695-00.u315", 0x2000, 0x0800, CRC(cdac76a7) SHA1(2a47f34ae63fb7fe96e7c6fc92ca4f629b0e31ec) )
+ ROM_LOAD( "160-1694-00.u305", 0x2800, 0x0800, CRC(c33ae212) SHA1(25ed4cc3600391fbc93bb46c92d3f64ca2aca58e) )
+ ROM_LOAD( "160-1693-00.u300", 0x3000, 0x0800, CRC(651b7af2) SHA1(7255c682cf74f2e77661d77c8406b36a567eea46) )
+
+ ROM_REGION( 0x14000, "672_0799_08", 0 ) // Memory Access Sequencer 672-0799-08
+ ROM_LOAD16_BYTE( "160-1698-00.u810", 0x00000, 0x2000, CRC(fd0b8bc3) SHA1(ea9caa151295024267a467ba636ad41aa0c517d3) )
+ ROM_LOAD16_BYTE( "160-1682-00.u893", 0x00001, 0x2000, CRC(d54104ef) SHA1(b796c320c8f96f6e4b845718bfb62ccb5903f2db) )
+ ROM_LOAD16_BYTE( "160-1699-00.u820", 0x04000, 0x2000, CRC(59cc6c2e) SHA1(b6d85cdfaaef360af2a4fc44eae55e512bb08b21) )
+ ROM_LOAD16_BYTE( "160-1684-00.u870", 0x04001, 0x2000, CRC(b24cdbaf) SHA1(476032624110bc5c7a7f30d10458e8baffb2f2ff) )
+ ROM_LOAD16_BYTE( "160-1700-00.u825", 0x08000, 0x2000, CRC(59f4a4e2) SHA1(81b5f74ec14bb13735382abc123bb9b09dfb7a63) )
+ ROM_LOAD16_BYTE( "160-1683-00.u880", 0x08001, 0x2000, CRC(f6bb15d1) SHA1(eca06211876c12236cfeae0417131e8f04728d51) )
+ ROM_LOAD16_BYTE( "160-1701-00.u835", 0x0c000, 0x2000, CRC(195988b9) SHA1(995a77963e869f1a461addf58db9ecbf2b9222ba) )
+ ROM_LOAD16_BYTE( "160-1691-00.u885", 0x0c001, 0x2000, CRC(0670bf9e) SHA1(a8c39bd7f3f61436296c6bc5f734354371ae8123) )
+ ROM_LOAD16_BYTE( "160-1702-00.u845", 0x10000, 0x2000, CRC(013344b1) SHA1(4a79654427e15d0fcedd9519914f6448938ecffd) )
+ ROM_LOAD16_BYTE( "160-1685-00.u863", 0x10001, 0x2000, CRC(53ddc8f9) SHA1(431d6f329dedebb54232c623a924d5ecddc5e44e) )
+
+ ROM_REGION( 0x2000, "020_0147_00", 0 ) // Firmware Backpack (020-0147-00)
+ ROM_LOAD( "156-0747-xx.u101", 0x0000, 0x0800, CRC(9e1facc1) SHA1(7e7a118c3e8c49630f630ee02c3de843dd95d7e1) ) // -00 or -01 ?
+ ROM_LOAD( "156-0748-xx.u201", 0x0800, 0x0800, CRC(be42bfbf) SHA1(23575b411bd9dcb7d7116628820096e3064ff93b) ) // -00 or -01 ?
+
+ ROM_REGION( 0x2000, "021_0188_00", 0 ) // Communications Backpack (021-0188-00)
+ ROM_LOAD( "156-0712-00.u101", 0x0000, 0x0800, NO_DUMP )
+ ROM_LOAD( "156-0712-01.u101", 0x0000, 0x0800, NO_DUMP )
+ ROM_LOAD( "156-0713-00.u111", 0x0800, 0x0800, NO_DUMP )
+ ROM_LOAD( "156-0713-01.u111", 0x0800, 0x0800, NO_DUMP )
+ ROM_LOAD( "156-0714-00.u121", 0x1000, 0x0800, NO_DUMP )
+ ROM_LOAD( "156-0714-01.u121", 0x1000, 0x0800, NO_DUMP )
+ ROM_LOAD( "156-0715-01.u131", 0x1800, 0x0800, NO_DUMP )
+ROM_END
+
+
+
+//**************************************************************************
+// SYSTEM DRIVERS
+//**************************************************************************
+
+/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */
+COMP( 1975, tek4051, 0, 0, tek4051, tek4051, driver_device, 0, "Tektronix", "Tektronix 4051", MACHINE_NOT_WORKING )
+COMP( 1978, tek4052a, tek4051, 0, tek4052, tek4051, driver_device, 0, "Tektronix", "Tektronix 4052A", MACHINE_NOT_WORKING )
+//COMP( 1979, tek4054, tek4051, 0, tek4054, tek4054, driver_device, 0, "Tektronix", "Tektronix 4054", MACHINE_NOT_WORKING )