Split cat.c into separate drivers for canon cat and iai swyft. (Part 2) [Lord Nightmare]

2025-04-29 03:20:50 +03:00 · 2015-10-22 01:10:05 -04:00 · 2015-10-22 01:10:05 -04:00 · aa766b58c5
commit aa766b58c5
parent 86d3537f95
1 changed files with 893 additions and 0 deletions
--- a/src/mame/drivers/swyft.c
+++ b/src/mame/drivers/swyft.c
@ -0,0 +1,893 @@
+// license:BSD-3-Clause
+// copyright-holders:Miodrag Milanovic, Jonathan Gevaryahu
+/***************************************************************************
+
+    IAI Swyft Model P0001
+    Copyright (C) 2009-2013 Miodrag Milanovic and Jonathan Gevaryahu AKA Lord Nightmare
+    With information and help from John "Sandy" Bumgarner, Dwight Elvey,
+    Charles Springer, Terry Holmes, Jonathan Sand, Aza Raskin and others.
+
+    See cat.c for the machine which the swyft later became.
+
+    This driver is dedicated in memory of Jef Raskin and Dave Boulton
+
+IAI detailed credits:
+Scott Kim - responsible for fonts on swyft and cat
+Ralph Voorhees - Model construction and mockups (swyft 'flat cat')
+
+Cat HLSL stuff:
+*scanlines:
+the cat has somewhat visible and fairly close scanlines with very little fuzziness
+try hlsl options:
+hlsl_prescale_x           4
+hlsl_prescale_y           4
+scanline_alpha            0.3
+scanline_size             1.0
+scanline_height           0.7
+scanline_bright_scale     1.0
+scanline_bright_offset    0.6
+*phosphor persistence of the original cat CRT is VERY LONG and fades to a greenish-yellow color, though the main color itself is white
+try hlsl option:
+phosphor_life             0.93,0.95,0.87
+which is fairly close but may actually be too SHORT compared to the real thing.
+
+
+Swyft versions:
+There are at least 4 variants of machines called 'swyft':
+* The earliest desktop units which use plexi or rubber-tooled case and an
+  angled monitor; about a dozen were made and at least two of clear plexi.
+  These are sometimes called "wrinkled" swyfts. 5.25" drive, they may be able
+  to read Apple2 Swyftware/Swyftdisk and Swyftcard-created disks.
+  It is possible no prototypes of this type got beyond the 'runs forth console only' stage.
+  http://archive.computerhistory.org/resources/access/physical-object/2011/09/102746929.01.01.lg.JPG
+  http://www.digibarn.com/collections/systems/swyft/Swyft-No2-05-1271.jpg
+  http://www.digibarn.com/friends/jef-raskin/slides/iai/A%20-687%20SWYFTPRO.JPG
+* The early "flat cat" or "roadkill" portable LCD screen units with a white
+  case and just a keyboard. Model SP0001
+  http://www.digibarn.com/collections/systems/swyft/Image82.jpg
+* The later "ur-cat" desktop units which use a machine tooled case and look
+  more or less like the canon cat. Around 100-200 were made. 3.5" drive.
+  These have a fully functional EDDE editor as the cat does, and can even compile
+  forth programs.
+  (the 'swyft' driver is based on one of these)
+* The very late portable LCD units with a dark grey case and a row of hotkey
+  buttons below the screen. Not dumped yet. At least one functional prototype exists.
+  At least one plastic mockup exists with no innards.
+  http://www.digibarn.com/collections/systems/swyft/swyft.jpg
+
+IAI Swyft:
+Board name: 950-0001C
+"INFORMATION APPLIANCE INC. COPYRIGHT 1985"
+ _________________|||||||||___________________________________________________________________________________
+|                     J8               [=======J3=======]  ____                              Trans-           |
+==                                                        /    \  (E2)                       former           |
+==Jx                   74LS107   J5                       |PB1 |        uA339     MC3403                 -----|
+|                                          7407           \____/                                         J7   =
+| Y1       "TIMING B" 74LS132    74LS175                                                                 -----|
+|                                                  ____________                            4N37  Relay   -----|
+| TMS4256   74LS161  "DECODE E" "DISK 3.5C"       |            |                                         J6   =
+|                                                 |  MC6850P   |                                         -----|
+| TMS4256   74LS166   74HCT259   74LS299          '------------'        MC3403    MC3403                 _____|
+|                      ___________________     ___________________             ||                       |     =
+| TMS4256   74LS373   |                   |   |                   |            J2                       | J1  =
+|                     |   MC68008P8       |   |       R6522P      |            ||              I   P R  |     =
+| TMS4256   74F153    '-------------------'   '-------------------'     MN4053 || MN4053       N   R E  | B   =
+|                                    (E1)                                                      D   O S  | R   =
+| TMS4256   74F153    74HCT08     __________   ___________________      MC14412   DS1489       U E T I  | E   =
+|                                |          | |                   | ||                         C S E S  | A   =
+| TMS4256   74F153    74HC4040E  | AM27256  | |       R6522P      | ||                         T D C T  | K   =
+|                                '----------' '-------------------' ||  INFORMATION            O   T O  | O   =
+| TMS4256   74F153    "VIDEO 2B" .----------.                       J4  APPLIANCE INC.         R   I R  | U   =
+|                                | AM27256  |   74HC02     74HC374  ||  Copyright 1985         S   O S  | T   =
+| TMS4256   74F153    74LS393  B1|__________|                       ||  UM95089  Y2                N    |     =
+|_____________________________[________J9___]__________________________________________________D13______|_____=
+
+*Devices of interest:
+J1: breakout of joystick, serial/rs232, hex-keypad, parallel port, and forth switch (and maybe cassette?) pins
+    DIL 60 pin 2-row right-angle rectangular connector with metal shield contact;
+    not all 60 pins are populated in the connector, only pins 1-6, 8, 13-15, 17-18, 23-30, 35-60 are present
+    (traced partly by dwight)
+J2: unpopulated 8-pin sip header, serial/rs232-related?
+    (vcc ? ? ? ? ? ? gnd) (random guess: txd, rxd, rts, cts, dsr, dtr, and one pin could be cd/ri though the modem circuit may do that separately?)
+J3: Floppy Connector
+    (standard DIL 34 pin 2-row rectangular connector for mini-shugart/pc floppy cable; pin 2 IS connected somewhere and ?probably? is used for /DISKCHANGE like on an Amiga, with pin 34 being /TRUEREADY?)
+    (as opposed to normal ibm pc 3.5" drives where pin 2 is unconnected or is /DENSITY *input to drive*, and pin 34 is /DISKCHANGE)
+J4: 18-pin sip header for keyboard ribbon cable; bottom edge of board is pin 1
+    Pins:
+    1: GND through 220k resistor r78
+    2: ? phone hook related? anode of diode d7; one of the pins of relay k2; topmost (boardwise) pin of transistor Q10
+    3: 74HCT34 pin
+
+J5: locking-tab-type "CONN HEADER VERT 4POS .100 TIN" connector for supplying power
+    through a small cable with a berg connector at the other end, to the floppy drive
+    (5v gnd gnd 12v)
+J6: Phone connector, rj11 jack
+J7: Line connector, rj11 jack
+J8: 9-pin Video out/power in connector "CONN RECEPT 6POS .156 R/A PCB" plus "CONN RECEPT 3POS .156 R/A PCB" acting as one 9-pin connector
+    (NC ? ? ? NC NC ? 12v 5v) (video, vsync, hsync and case/video-gnd are likely here)
+    (the video pinout of the cat is: (Video Vsync Hsync SyncGnd PwrGnd PwrGnd +5v(VCC) +12v(VDD) -12v(VEE)) which is not the same as the swyft.
+J9: unpopulated DIL 40-pin straight connector for a ROM debug/expansion/RAM-shadow daughterboard
+    the pins after pin 12 connect to that of the ROM-LO 27256 pinout counting pins 1,28,2,27,3,26,etc
+    the ROM-HI rom has a different /HICE pin which is not connected to this connector
+    /LOCE is a15
+    /HICE is !a15
+    /ROM_OE comes from pin 14 of DECODE_E pal, and is shorted to /ROM_OE' by the cuttable jumper B1 which is not cut
+    /ROM_OE' goes to the two EPROMS
+    DECODE_18 is DECODE_E pal pin 18
+    pin 1 (GND) is in the lower left and the pins count low-high then to the right
+    (gnd N/C   E_CLK     R/W    /ROM_OE a17 vcc a14 a13 a8 a9 a11 /ROM_OE' a10 a15 d7 d6 d5 d4 d3 )
+    (GND /IPL1 DECODE_18 /RESET gnd     a16 vcc a12 a7  a6 a5 a4  a3       a2  a1  a0 d0 d1 d2 gnd)
+Jx: 4 pin on top side, 6 pin on bottom side edge ?debug? connector (doesn't have a Jx number)
+    (trace me!)
+B1: a cuttable trace on the pcb. Not cut, affects one of the pins on the unpopulated J9 connector only.
+E1: jumper, unknown purpose, not set
+E2: jumper, unknown purpose, not set
+D13: LED
+R6522P (upper): parallel port via
+R6522P (lower): keyboard via
+UM95089: DTMF Tone generator chip (if you read the datasheet this is technically ROM based!)
+Y1: 15.8976Mhz, main clock?
+Y2: 3.579545Mhz, used by the DTMF generator chip UM95089 (connects to pins 7 and 8 of it)
+TMS4256-15NL - 262144 x 1 DRAM
+PB1 - piezo speaker
+
+*Pals:
+"TIMING B" - AMPAL16R4APC (marked on silkscreen "TIMING PAL")
+"DECODE E" - AMPAL16L8PC (marked on silkscreen "DECODE PAL")
+"VIDEO 2B" - AMPAL16R4PC (marked on silkscreen "VIDEO PAL")
+"DISK 3.5C" - AMPAL16R4PC (marked on silkscreen "DISK PAL")
+
+*Deviations from silkscreen:
+4N37 (marked on silkscreen "4N35")
+74F153 (marked on silkscreen "74ALS153")
+74HCT259 is socketed, possibly intended that the rom expansion daughterboard will have a ribbon cable fit in its socket?
+
+
+ToDo:
+* Swyft
+- Figure out the keyboard (interrupts are involved? or maybe an NMI on a
+  timer/vblank? It is possible this uses a similar 'keyboard read int'
+  to what the cat does)
+- get the keyboard scanning actually working; the VIAs are going nuts right now.
+- Beeper (on one of the vias?)
+- vblank/hblank stuff
+- Get the 6850 ACIA working for communications
+- Floppy (probably similar to the Cat)
+- Centronics port (attached to one of the VIAs)
+- Joystick port (also likely on a via)
+- Keypad? (also likely on a via done as a grid scan?)
+- Forth button (on the port on the back; keep in mind shift-usefront-space ALWAYS enables forth on a swyft)
+- Multple undumped firmware revisions exist (330 and 331 are dumped)
+
+// 74ls107 @ u18 pin 1 is 68008 /BERR pin
+
+// mc6850 @ u33 pin 2 (RX_DATA) is
+// mc6850 @ u33 pin 3 (RX_CLK) is 6522 @ u35 pin 17 (PB7)
+// mc6850 @ u33 pin 4 (TX_CLK) is 6522 @ u35 pin 17 (PB7)
+// mc6850 @ u33 pin 5 (/RTS) is
+// mc6850 @ u33 pin 6 (TX_DATA) is
+// mc6850 @ u33 pin 7 (/IRQ) is 68008 /IPL1 pin 41
+// mc6850 @ u33 pin 8 (CS0) is 68008 A12 pin 10
+// mc6850 @ u33 pin 9 (CS2) is DECODE E pin 18
+// mc6850 @ u33 pin 10 (CS1) is 68008 /BERR pin 40
+// mc6850 @ u33 pin 11 (RS) is 68008 A0 pin 46
+// mc6850 @ u33 pin 13 (R/W) is 68008 R/W pin 30
+// mc6850 @ u33 pin 14 (E) is 68008 E pin 38
+// mc6850 @ u33 pin 15-22 (D7-D0) are 68008 D7 to D0 pins 20-27
+// mc6850 @ u33 pin 23 (/DCD) is 74hc02 @ u35 pin 1
+// mc6850 @ u33 pin 24 (/CTS) is N/C?
+
+// 6522 @ u34:
+// pin 2 (PA0) :
+// pin 3 (PA1) :
+// pin 4 (PA2) :
+// pin 5 (PA3) :
+// pin 6 (PA4) :
+// pin 7 (PA5) :
+// pin 8 (PA6) :
+// pin 9 (PA7) :
+// pin 10 (PB0) :
+// pin 11 (PB1) :
+// pin 12 (PB2) :
+// pin 13 (PB3) :
+// pin 14 (PB4) :
+// pin 15 (PB5) :
+// pin 16 (PB6) :
+// pin 17 (PB7) :
+// pin 18 (CB1) : ?from/to? Floppy connector j3 pin 8
+// pin 19 (CB2) : ?from/to? 6522 @ u35 pin 16 (PB6)
+// pin 21 (/IRQ) : out to 68008 /IPL1 pin 41
+// pin 22 (R/W) : in from 68008 R/W pin 30
+// pin 23 (/CS2) : in from DECODE E pin 18
+// pin 24 (CS1) : in from 68008 A13 pin 11
+// pin 25 (Phi2) : in from 68008 E pin 38
+// pins 26-33 : in/out from/to 68008 D7 to D0 pins 20-27
+// pin 34 (/RES) : in from 68008 /RESET pin 37 AND 68008 /HALT pin 36
+// pins 35-38 (RS3-RS0) are 68008 A9-A6 pins 7-4
+// pin 39 (CA2) is through inductor L11 and resistor r128 to peripheral connector pin 35 <end minus 26>
+// pin 40 (CA1) is through inductor L30 and resistor r138 to peripheral connector pin 53 <end minus 8>
+
+// 6522 @ u35
+// pin 2 (PA0) :
+// pin 3 (PA1) :
+// pin 4 (PA2) :
+// pin 5 (PA3) :
+// pin 6 (PA4) :
+// pin 7 (PA5) :
+// pin 8 (PA6) :
+// pin 9 (PA7) :
+// pin 10 (PB0) :
+// pin 11 (PB1) : in from 74hc02 @ u36 pin 4
+// pin 12 (PB2) :
+// pin 13 (PB3) :
+// pin 14 (PB4) :
+// pin 15 (PB5) :
+// pin 16 (PB6) : 6522 @ u34 pin 19 (CB2)
+// pin 17 (PB7) : mc6850 @ u33 pins 3 and 4 (RX_CLK, TX_CLK)
+// pin 18 (CB1) : ds1489an @ u45 pin 11
+// pin 19 (CB2) : mn4053b @ u40 pin 11 and mc14412 @ u41 pin 10
+// pin 21 (/IRQ) : out to 68008 /IPL1 pin 41
+// pin 22 (R/W) : in from 68008 R/W pin 30
+// pin 23 (/CS2) : in from DECODE E pin 18
+// pin 24 (CS1) : in from 68008 A14 pin 12
+// pin 25 (Phi2) : in from 68008 E pin 38
+// pins 26-33 : in/out from/to 68008 D7 to D0 pins 20-27
+// pin 34 (/RES) : in from 68008 /RESET pin 37 AND 68008 /HALT pin 36
+// pins 35-38 (RS3-RS0) : in from 68008 A9-A6 pins 7-4
+// pin 39 (CA2) : out to 74HCT34 pin 11 (CLK) (keyboard column latch)
+// pin 40 (CA1) : out? to? ds1489an @ u45 pin 8
+
+// 74hc02 @ u36:
+// pin 1 (Y1) : out to mc6850 @ u33 pin 23 /DCD
+// pin 2 (A1) : in from (2 places: resistor R58 to ua339 @ u38 pin 4 (In1-)) <where does this actually come from? modem offhook?>
+// pin 3 (B1) : in from mn4053b @ u40  pin 10 <probably from rs232>
+// pin 4 (Y2) : out to 6522 @u35 pin 11
+// pin 5 (A2) : in from 4N37 @ u48 pin 5 (output side emitter pin) (tied via R189 to gnd) <ring indicator?>
+// pin 6 (B2) : in from 4N37 @ u48 pin 5 (output side emitter pin) (tied via R189 to gnd) <ring indicator?>
+// pin 8 (B3) :
+// pin 9 (A3) :
+// pin 10 (Y3) :
+// pin 11 (B4) : in from 68008 A15
+// pin 12 (A4) : in from 68008 A15
+// pin 13 (Y4) : out to EPROM @ U31 /CE
+
+****************************************************************************/
+
+// Defines
+
+#undef DEBUG_GA2OPR_W
+#undef DEBUG_VIDEO_CONTROL_W
+
+#undef DEBUG_FLOPPY_CONTROL_W
+#undef DEBUG_FLOPPY_CONTROL_R
+#undef DEBUG_FLOPPY_DATA_W
+#undef DEBUG_FLOPPY_DATA_R
+#undef DEBUG_FLOPPY_STATUS_R
+
+#undef DEBUG_PRINTER_DATA_W
+#undef DEBUG_PRINTER_CONTROL_W
+
+#undef DEBUG_MODEM_R
+#undef DEBUG_MODEM_W
+
+#undef DEBUG_DUART_OUTPUT_LINES
+// data sent to rs232 port
+#undef DEBUG_DUART_TXA
+// data sent to modem chip
+#undef DEBUG_DUART_TXB
+#undef DEBUG_DUART_IRQ_HANDLER
+#undef DEBUG_PRN_FF
+
+#undef DEBUG_TEST_W
+
+#define DEBUG_SWYFT_VIA0 1
+#define DEBUG_SWYFT_VIA1 1
+
+
+// Includes
+#include "emu.h"
+#include "cpu/m68000/m68000.h"
+#include "machine/clock.h"
+#include "machine/6850acia.h"
+#include "machine/6522via.h"
+#include "sound/speaker.h"
+#include "bus/centronics/ctronics.h"
+
+class swyft_state : public driver_device
+{
+public:
+	swyft_state(const machine_config &mconfig, device_type type, const char *tag)
+		: driver_device(mconfig, type, tag),
+		m_maincpu(*this, "maincpu"),
+		m_ctx(*this, "ctx"),
+		m_ctx_data_out(*this, "ctx_data_out"),
+		m_acia6850(*this, "acia6850"),
+		m_via0(*this, "via6522_0"),
+		m_via1(*this, "via6522_1"),
+		m_speaker(*this, "speaker"),
+		m_p_swyft_videoram(*this, "p_swyft_vram")
+		/*m_y0(*this, "Y0"),
+		m_y1(*this, "Y1"),
+		m_y2(*this, "Y2"),
+		m_y3(*this, "Y3"),
+		m_y4(*this, "Y4"),
+		m_y5(*this, "Y5"),
+		m_y6(*this, "Y6"),
+		m_y7(*this, "Y7")*/
+		{ }
+
+	required_device<cpu_device> m_maincpu;
+	optional_device<centronics_device> m_ctx;
+	optional_device<output_latch_device> m_ctx_data_out;
+	required_device<acia6850_device> m_acia6850; // only swyft uses this
+	required_device<via6522_device> m_via0; // only swyft uses this
+	required_device<via6522_device> m_via1; // only swyft uses this
+	optional_device<speaker_sound_device> m_speaker;
+	required_shared_ptr<UINT8> m_p_swyft_videoram;
+	/*optional_ioport m_y0;
+	optional_ioport m_y1;
+	optional_ioport m_y2;
+	optional_ioport m_y3;
+	optional_ioport m_y4;
+	optional_ioport m_y5;
+	optional_ioport m_y6;
+	optional_ioport m_y7;*/
+
+	DECLARE_MACHINE_START(swyft);
+	DECLARE_MACHINE_RESET(swyft);
+	DECLARE_VIDEO_START(swyft);
+
+	UINT32 screen_update_swyft(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
+
+	DECLARE_READ8_MEMBER(swyft_d0000);
+
+	DECLARE_READ8_MEMBER(swyft_via0_r);
+	DECLARE_WRITE8_MEMBER(swyft_via0_w);
+	DECLARE_READ8_MEMBER(via0_pa_r);
+	DECLARE_WRITE8_MEMBER(via0_pa_w);
+	DECLARE_WRITE_LINE_MEMBER(via0_ca2_w);
+	DECLARE_READ8_MEMBER(via0_pb_r);
+	DECLARE_WRITE8_MEMBER(via0_pb_w);
+	DECLARE_WRITE_LINE_MEMBER(via0_cb1_w);
+	DECLARE_WRITE_LINE_MEMBER(via0_cb2_w);
+	DECLARE_WRITE_LINE_MEMBER(via0_int_w);
+
+	DECLARE_READ8_MEMBER(swyft_via1_r);
+	DECLARE_WRITE8_MEMBER(swyft_via1_w);
+	DECLARE_READ8_MEMBER(via1_pa_r);
+	DECLARE_WRITE8_MEMBER(via1_pa_w);
+	DECLARE_WRITE_LINE_MEMBER(via1_ca2_w);
+	DECLARE_READ8_MEMBER(via1_pb_r);
+	DECLARE_WRITE8_MEMBER(via1_pb_w);
+	DECLARE_WRITE_LINE_MEMBER(via1_cb1_w);
+	DECLARE_WRITE_LINE_MEMBER(via1_cb2_w);
+	DECLARE_WRITE_LINE_MEMBER(via1_int_w);
+
+	DECLARE_WRITE_LINE_MEMBER(write_acia_clock);
+
+	/* gate array 2 has a 16-bit counter inside which counts at 10mhz and
+	   rolls over at FFFF->0000; on roll-over (or likely at FFFF terminal count)
+	   it triggers the KTOBF output. It does this every 6.5535ms, which causes
+	   a 74LS74 d-latch at IC100 to invert the state of the DUART IP2 line;
+	   this causes the DUART to fire an interrupt, which makes the 68000 read
+	   the keyboard.
+	   The watchdog counter and the 6ms counter are both incremented
+	   every time the KTOBF pulses.
+	 */
+	UINT8 m_keyboard_line;
+	UINT8 m_floppy_control;
+
+//protected:
+	//virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
+};
+
+
+static INPUT_PORTS_START( swyft )
+// insert dwight and sandy's swyft keyboard map here once we figure out the byte line order
+	PORT_START("Y0")
+	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_N) PORT_CHAR('n') PORT_CHAR('N')
+	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_M) PORT_CHAR('m') PORT_CHAR('M')
+	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_K) PORT_CHAR('k') PORT_CHAR('K')
+	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_J) PORT_CHAR('j') PORT_CHAR('J')
+	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Y) PORT_CHAR('y') PORT_CHAR('Y')
+	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_T) PORT_CHAR('t') PORT_CHAR('T')
+	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('\xa2')
+	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%')
+
+	PORT_START("Y1")
+	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_B) PORT_CHAR('n') PORT_CHAR('B')
+	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<')
+	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_L) PORT_CHAR('l') PORT_CHAR('L')
+	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_H) PORT_CHAR('h') PORT_CHAR('H')
+	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_U) PORT_CHAR('u') PORT_CHAR('U')
+	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_R) PORT_CHAR('r') PORT_CHAR('R')
+	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('&')
+	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$')
+
+	PORT_START("Y2")
+	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_V) PORT_CHAR('v') PORT_CHAR('V')
+	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>')
+	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR(':')
+	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_G) PORT_CHAR('g') PORT_CHAR('G')
+	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_I) PORT_CHAR('i') PORT_CHAR('I')
+	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED) // totally unused
+	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('*')
+	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#')
+
+	PORT_START("Y3")
+	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_C) PORT_CHAR('c') PORT_CHAR('C')
+	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Left USE FRONT") PORT_CODE(KEYCODE_LCONTROL)
+	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_QUOTE) PORT_CHAR('\'') PORT_CHAR('"')
+	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F) PORT_CHAR('f') PORT_CHAR('F')
+	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_O) PORT_CHAR('o') PORT_CHAR('O')
+	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_E) PORT_CHAR('e') PORT_CHAR('E')
+	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR('(')
+	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNUSED) // totally unused
+
+	PORT_START("Y4")
+	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_X) PORT_CHAR('x') PORT_CHAR('X')
+	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Right USE FRONT") PORT_CODE(KEYCODE_RCONTROL)
+	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Right Shift") PORT_CODE(KEYCODE_F2) // intl only: latin diaresis and latin !; norway, danish and finnish * and '; others
+	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_D) PORT_CHAR('d') PORT_CHAR('D')
+	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_P) PORT_CHAR('p') PORT_CHAR('P')
+	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_W) PORT_CHAR('w') PORT_CHAR('W')
+	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_CHAR(')')
+	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('@')
+
+	PORT_START("Y5")
+	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Z) PORT_CHAR('z') PORT_CHAR('Z')
+	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ')
+	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Return") PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13)
+	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_S) PORT_CHAR('s') PORT_CHAR('S')
+	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('\xbd') PORT_CHAR('\xbc') //PORT_CHAR('}') PORT_CHAR('{')
+	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Q) PORT_CHAR('q') PORT_CHAR('Q')
+	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('_')
+	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!')
+
+	PORT_START("Y6")
+	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Left Shift") PORT_CODE(KEYCODE_F1) // intl only: latin inv ? and inv !; norway and danish ! and |; finnish <>; others
+	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Left LEAP") PORT_CODE(KEYCODE_LALT)
+	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?')
+	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_A) PORT_CHAR('a') PORT_CHAR('A')
+	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR(']') PORT_CHAR('[')
+	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_TAB) PORT_CHAR('\t')
+	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('=') PORT_CHAR('+')
+	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNUSED) // totally unused
+
+	PORT_START("Y7")
+	PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Shift") PORT_CODE(KEYCODE_RSHIFT) PORT_CODE(KEYCODE_LSHIFT) PORT_CHAR(UCHAR_SHIFT_1)
+	PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Right Leap") PORT_CODE(KEYCODE_RALT)
+	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Page") PORT_CODE(KEYCODE_PGUP) PORT_CODE(KEYCODE_PGDN)
+	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Shift Lock") PORT_CODE(KEYCODE_CAPSLOCK)
+	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Erase") PORT_CODE(KEYCODE_BACKSPACE)
+	PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED) // totally unused
+	PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("UNDO") PORT_CODE(KEYCODE_BACKSLASH)
+	PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_TILDE) PORT_CHAR('\xb1') PORT_CHAR('\xb0') // PORT_CHAR('\\') PORT_CHAR('~')
+INPUT_PORTS_END
+
+
+/* Swyft rom and ram notes:
+rom:
+**Vectors:
+0x0000-0x0003: SP boot vector
+0x0004-0x0007: PC boot vector
+**unknown:
+0x0009-0x00BF: ? table
+0x00C0-0x01DF: ? table
+0x01E0-0x02DF: ? table (may be part of next table)
+0x02E0-0x03DF: ? table
+0x03E0-0x0B3F: int16-packed jump table (expanded to int32s at ram at 0x46000-0x46EC0 on boot)
+0x0B40-0x0E83: ? function index tables?
+0x0E84-0x1544: binary code (purpose?)
+0x1545-0x24CF: ?
+**Fonts:
+0x24D0-0x254F: ? (likely font 1 width lookup table)
+0x2550-0x2BCF: Font 1 data
+0x2BD0-0x2C4F: ? (likely font 2 width lookup table)
+0x2C50-0x32CF: Font 2 data
+**unknown?:
+0x32D0-0x360F: String data (and control codes?)
+0x3610-0x364F: ? fill (0x03 0xe8)
+0x3650-0x369F: ? fill (0x03 0x20)
+0x36A0-0x384d: ? forth code?
+0x384e-0x385d: Lookup table for phone keypad
+0x385e-...: ?
+...-0xC951: ?
+0xC952: boot vector
+0xC952-0xCAAE: binary code (purpose?)
+    0xCD26-0xCD3B: ?init forth bytecode?
+0xCD3C-0xCEBA: 0xFF fill (unused?)
+0xCEEB-0xFFFE: Forth dictionaries for compiling, with <word> then <3 bytes> afterward? (or before it? most likely afterward)
+
+ram: (system dram ranges from 0x40000-0x7FFFF)
+0x40000-0x425CF - the screen display ram
+(?0x425D0-0x44BA0 - ?unknown (maybe screen ram page 2?))
+0x44DC6 - SP vector
+0x46000-0x46EC0 - jump tables to instructions for ? (each forth word?)
+
+
+on boot:
+copy/expand packed rom short words 0x3E0-0xB3F to long words at 0x46000-0x46EC0
+copy 0x24f longwords of zero beyond that up to 0x47800
+CD26->A5 <?pointer to init stream function?>
+44DC6->A7 <reset SP... why it does this twice, once by the vector and once here, i'm gonna guess has to do with running the code in a debugger or on a development daughterboard like the cat had, where the 68008 wouldn't get explicitly reset>
+44F2A->A6 <?pointer to work ram space?>
+EA2->A4 <?function>
+E94->A3 <?function>
+EAE->A2 <?function>
+41800->D7 <?forth? opcode index base; the '1800' portion gets the opcode type added to it then is multiplied by 4 to produce the jump table offset within the 0x46000-0x46EC0 range>
+46e3c->D4 <?pointer to more work ram space?>
+CD22->D5 <?pointer to another function?>
+write 0xFFFF to d0004.l
+jump to A4(EA2)
+
+read first stream byte (which is 0x03) from address pointed to by A5 (which is CD26), inc A5, OR the opcode (0x03) to D7
+ (Note: if the forth opcodes are in order in the dictionary, then 0x03 is "!char" which is used to read a char from an arbitrary address)
+copy D7 to A0
+Add A0 low word to itself
+Add A0 low word to itself again
+move the long word from address pointed to by A0 (i.e. the specific opcode's area at the 46xxx part of ram) to A1
+Jump to A1(11A4)
+
+11A4: move 41b00 to D0 (select an opcode "page" 1bxx)
+jump to 118E
+
+118E: read next stream byte (in this case, 0x8E) from address pointed to by A5 (which is CD27), inc A5, OR the opcode (0x8e) to D7
+add to 41b00 in d0, for 41b8E
+Add A0 low word to itself
+Add A0 low word to itself again
+move the long word from address pointed to by A0 (i.e. the specific opcode's area at the 46xxx part of ram) to A1
+Jump to A1(CD06)
+
+CD06: jump to A3 (E94)
+
+E94: subtract D5 from A5 (cd28 - cd22 = 0x0006)
+write 6 to address @A5(44f28) and decrement A5
+write D4(46e3c) to address @a6(44f26) and decrement a5
+lea ($2, A1), A5 - i.e. increment A1 by 2, and write that to A5, so write CD06+2=CD08 to A5
+A1->D5
+A0->D4
+read next stream byte (in this case, 0x03) from address pointed to by A5 (which is CD08), inc A5, OR the opcode (0x03) to D7
+
+*/
+
+/* Swyft Memory map, based on watching the infoapp roms do their thing:
+68k address map:
+(a23,a22,a21,a20 lines don't exist on the 68008 so are considered unconnected)
+a23 a22 a21 a20 a19 a18 a17 a16 a15 a14 a13 a12 a11 a10 a9  a8  a7  a6  a5  a4  a3  a2  a1  a0
+x   x   x   x   0   0   ?   ?   0   *   *   *   *   *   *   *   *   *   *   *   *   *   *   *        R   ROM-LO (/LOCE is 0, /HICE is 1)
+x   x   x   x   0   0   ?   ?   1   *   *   *   *   *   *   *   *   *   *   *   *   *   *   *        R   ROM-HI (/LOCE is 1, /HICE is 0)
+x   x   x   x   0   1   *   *   *   *   *   *   *   *   *   *   *   *   *   *   *   *   *   a        RW  RAM
+x   x   x   x   1   1  ?0? ?1?  ?   ?   ?   ?   ?   ?   ?   ?   ?   ?   ?   ?   *   *   *   *        R   ? status of something? floppy?
+x   x   x   x   1   1  ?1? ?0?  ?   0   0   1   x   x   x   x   x   x   x   x   x   x   x   *        RW  6850 acia @U33, gets 0x55 steadystate and 0x57 written to it to reset it
+x   x   x   x   1   1  ?1? ?0?  ?   0   1   0   x   x   *   *   *   *   x   x   x   x   x   x        RW  Parallel VIA 0 @ U34
+x   x   x   x   1   1  ?1? ?0?  ?   1   0   0   x   x   *   *   *   *   x   x   x   x   x   x        RW  Keyboard VIA 1 @ U35
+              ^               ^               ^               ^               ^
+
+*/
+
+static ADDRESS_MAP_START(swyft_mem, AS_PROGRAM, 8, swyft_state)
+	ADDRESS_MAP_UNMAP_HIGH
+	AM_RANGE(0x000000, 0x00ffff) AM_ROM AM_MIRROR(0xF00000) // 64 KB ROM
+	AM_RANGE(0x040000, 0x07ffff) AM_RAM AM_MIRROR(0xF00000) AM_SHARE("p_swyft_vram") // 256 KB RAM
+	AM_RANGE(0x0d0000, 0x0d000f) AM_READ(swyft_d0000) AM_MIRROR(0xF00000) // status of something? reads from d0000, d0004, d0008, d000a, d000e
+	AM_RANGE(0x0e1000, 0x0e1000) AM_DEVWRITE("acia6850", acia6850_device, control_w) AM_MIRROR(0xF00000) // 6850 ACIA lives here
+	AM_RANGE(0x0e2000, 0x0e2fff) AM_READWRITE(swyft_via0_r, swyft_via0_w) AM_MIRROR(0xF00000)// io area with selector on a9 a8 a7 a6?
+	AM_RANGE(0x0e4000, 0x0e4fff) AM_READWRITE(swyft_via1_r, swyft_via1_w) AM_MIRROR(0xF00000)
+ADDRESS_MAP_END
+
+MACHINE_START_MEMBER(swyft_state,swyft)
+{
+	m_via0->write_ca1(1);
+	m_via0->write_ca2(1);
+	m_via0->write_cb1(1);
+	m_via0->write_cb2(1);
+
+	m_via1->write_ca1(1);
+	m_via1->write_ca2(1);
+	m_via1->write_cb1(1);
+	m_via1->write_cb2(1);
+}
+
+MACHINE_RESET_MEMBER(swyft_state,swyft)
+{
+}
+
+VIDEO_START_MEMBER(swyft_state,swyft)
+{
+}
+
+UINT32 swyft_state::screen_update_swyft(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
+{
+	UINT16 code;
+	int y, x, b;
+
+	int addr = 0;
+	for (y = 0; y < 242; y++)
+	{
+		int horpos = 0;
+		for (x = 0; x < 40; x++)
+		{
+			code = m_p_swyft_videoram[addr++];
+			for (b = 7; b >= 0; b--)
+			{
+				bitmap.pix16(y, horpos++) = (code >> b) & 0x01;
+			}
+		}
+	}
+	return 0;
+}
+
+READ8_MEMBER( swyft_state::swyft_d0000 )
+{
+	// wtf is this supposed to be?
+	UINT8 byte = 0xFF; // ?
+	logerror("mystery device: read from 0x%5X, returning %02X\n", offset+0xD0000, byte);
+	return byte;
+}
+
+
+// if bit is 1 enable: (obviously don't set more than one bit or you get bus contention!)
+//                                           acia
+//                                       via0
+//                                    via1
+// x   x   x   x   1   1  ?1? ?0?  ?   ^   ^   ^   ?   ?   *   *   *   *  ?*?  ?   ?   ?   ?   ?
+//                                                         ^   ^   ^   ^  <- these four bits address the VIA registers? is this correct?
+static const char *const swyft_via_regnames[] = { "0: ORB/IRB", "1: ORA/IRA", "2: DDRB", "3: DDRA", "4: T1C-L", "5: T1C-H", "6: T1L-L", "7: T1L-H", "8: T2C-L" "9: T2C-H", "A: SR", "B: ACR", "C: PCR", "D: IFR", "E: IER", "F: ORA/IRA*" };
+
+READ8_MEMBER( swyft_state::swyft_via0_r )
+{
+	if (offset&0x000C3F) fprintf(stderr,"VIA0: read from invalid offset in 68k space: %06X!\n", offset);
+	UINT8 data = m_via0->read(space, (offset>>6)&0xF);
+#ifdef DEBUG_SWYFT_VIA0
+	logerror("VIA0 register %s read by cpu: returning %02x\n", swyft_via_regnames[(offset>>5)&0xF], data);
+#endif
+	return data;
+}
+
+WRITE8_MEMBER( swyft_state::swyft_via0_w )
+{
+#ifdef DEBUG_SWYFT_VIA0
+	logerror("VIA0 register %s written by cpu with data %02x\n", swyft_via_regnames[(offset>>5)&0xF], data);
+#endif
+	if (offset&0x000C3F) fprintf(stderr,"VIA0: write to invalid offset in 68k space: %06X, data: %02X!\n", offset, data);
+	m_via1->write(space, (offset>>6)&0xF, data);
+}
+
+READ8_MEMBER( swyft_state::swyft_via1_r )
+{
+	if (offset&0x000C3F) fprintf(stderr," VIA1: read from invalid offset in 68k space: %06X!\n", offset);
+	UINT8 data = m_via1->read(space, (offset>>6)&0xF);
+#ifdef DEBUG_SWYFT_VIA1
+	logerror(" VIA1 register %s read by cpu: returning %02x\n", swyft_via_regnames[(offset>>5)&0xF], data);
+#endif
+	return data;
+}
+
+WRITE8_MEMBER( swyft_state::swyft_via1_w )
+{
+#ifdef DEBUG_SWYFT_VIA1
+	logerror(" VIA1 register %s written by cpu with data %02x\n", swyft_via_regnames[(offset>>5)&0xF], data);
+#endif
+	if (offset&0x000C3F) fprintf(stderr," VIA1: write to invalid offset in 68k space: %06X, data: %02X!\n", offset, data);
+	m_via0->write(space, (offset>>6)&0xF, data);
+}
+
+// first via
+READ8_MEMBER( swyft_state::via0_pa_r )
+{
+	logerror("VIA0: Port A read!\n");
+	return 0xFF;
+}
+
+WRITE8_MEMBER( swyft_state::via0_pa_w )
+{
+	logerror("VIA0: Port A written with data of 0x%02x!\n", data);
+}
+
+WRITE_LINE_MEMBER ( swyft_state::via0_ca2_w )
+{
+	logerror("VIA0: CA2 written with %d!\n", state);
+}
+
+READ8_MEMBER( swyft_state::via0_pb_r )
+{
+	logerror("VIA0: Port B read!\n");
+	return 0xFF;
+}
+
+WRITE8_MEMBER( swyft_state::via0_pb_w )
+{
+	logerror("VIA0: Port B written with data of 0x%02x!\n", data);
+}
+
+WRITE_LINE_MEMBER ( swyft_state::via0_cb1_w )
+{
+	logerror("VIA0: CB1 written with %d!\n", state);
+}
+
+WRITE_LINE_MEMBER ( swyft_state::via0_cb2_w )
+{
+	logerror("VIA0: CB2 written with %d!\n", state);
+}
+
+WRITE_LINE_MEMBER ( swyft_state::via0_int_w )
+{
+	logerror("VIA0: INT output set to %d!\n", state);
+}
+
+// second via
+READ8_MEMBER( swyft_state::via1_pa_r )
+{
+	logerror(" VIA1: Port A read!\n");
+	return 0xFF;
+}
+
+WRITE8_MEMBER( swyft_state::via1_pa_w )
+{
+	logerror(" VIA1: Port A written with data of 0x%02x!\n", data);
+}
+
+WRITE_LINE_MEMBER ( swyft_state::via1_ca2_w )
+{
+	logerror(" VIA1: CA2 written with %d!\n", state);
+}
+
+READ8_MEMBER( swyft_state::via1_pb_r )
+{
+	logerror(" VIA1: Port B read!\n");
+	return 0xFF;
+}
+
+WRITE8_MEMBER( swyft_state::via1_pb_w )
+{
+	logerror(" VIA1: Port B written with data of 0x%02x!\n", data);
+}
+
+WRITE_LINE_MEMBER ( swyft_state::via1_cb1_w )
+{
+	logerror(" VIA1: CB1 written with %d!\n", state);
+}
+
+WRITE_LINE_MEMBER ( swyft_state::via1_cb2_w )
+{
+	logerror(" VIA1: CB2 written with %d!\n", state);
+}
+
+WRITE_LINE_MEMBER ( swyft_state::via1_int_w )
+{
+	logerror(" VIA1: INT output set to %d!\n", state);
+}
+
+WRITE_LINE_MEMBER( swyft_state::write_acia_clock )
+{
+	m_acia6850->write_txc(state);
+	m_acia6850->write_rxc(state);
+}
+
+static MACHINE_CONFIG_START( swyft, swyft_state )
+
+	/* basic machine hardware */
+	MCFG_CPU_ADD("maincpu",M68008, XTAL_15_8976MHz/2) //MC68008P8, Y1=15.8976Mhz, clock GUESSED at Y1 / 2
+	MCFG_CPU_PROGRAM_MAP(swyft_mem)
+
+	MCFG_MACHINE_START_OVERRIDE(swyft_state,swyft)
+	MCFG_MACHINE_RESET_OVERRIDE(swyft_state,swyft)
+
+	/* video hardware */
+	MCFG_SCREEN_ADD("screen", RASTER)
+	MCFG_SCREEN_REFRESH_RATE(50)
+	MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */
+	MCFG_SCREEN_SIZE(320, 242)
+	MCFG_SCREEN_VISIBLE_AREA(0, 320-1, 0, 242-1)
+	MCFG_SCREEN_UPDATE_DRIVER(swyft_state, screen_update_swyft)
+	MCFG_SCREEN_PALETTE("palette")
+
+	MCFG_PALETTE_ADD_BLACK_AND_WHITE("palette")
+
+	MCFG_VIDEO_START_OVERRIDE(swyft_state,swyft)
+
+	MCFG_DEVICE_ADD("acia6850", ACIA6850, 0)
+	// acia rx and tx clocks come from one of the VIA pins and are tied together, fix this below? acia e clock comes from 68008
+	MCFG_DEVICE_ADD("acia_clock", CLOCK, (XTAL_15_8976MHz/2)/5) // out e clock from 68008, ~ 10in clocks per out clock
+	MCFG_CLOCK_SIGNAL_HANDLER(WRITELINE(swyft_state, write_acia_clock))
+
+	MCFG_DEVICE_ADD("via6522_0", VIA6522, (XTAL_15_8976MHz/2)/5) // out e clock from 68008
+	MCFG_VIA6522_READPA_HANDLER(READ8(swyft_state, via0_pa_r))
+	MCFG_VIA6522_READPB_HANDLER(READ8(swyft_state, via0_pb_r))
+	MCFG_VIA6522_WRITEPA_HANDLER(WRITE8(swyft_state, via0_pa_w))
+	MCFG_VIA6522_WRITEPB_HANDLER(WRITE8(swyft_state, via0_pb_w))
+	MCFG_VIA6522_CB1_HANDLER(WRITELINE(swyft_state, via0_cb1_w))
+	MCFG_VIA6522_CA2_HANDLER(WRITELINE(swyft_state, via0_ca2_w))
+	MCFG_VIA6522_CB2_HANDLER(WRITELINE(swyft_state, via0_cb2_w))
+	MCFG_VIA6522_IRQ_HANDLER(WRITELINE(swyft_state, via0_int_w))
+
+	MCFG_DEVICE_ADD("via6522_1", VIA6522, (XTAL_15_8976MHz/2)/5) // out e clock from 68008
+	MCFG_VIA6522_READPA_HANDLER(READ8(swyft_state, via1_pa_r))
+	MCFG_VIA6522_READPB_HANDLER(READ8(swyft_state, via1_pb_r))
+	MCFG_VIA6522_WRITEPA_HANDLER(WRITE8(swyft_state, via1_pa_w))
+	MCFG_VIA6522_WRITEPB_HANDLER(WRITE8(swyft_state, via1_pb_w))
+	MCFG_VIA6522_CB1_HANDLER(WRITELINE(swyft_state, via1_cb1_w))
+	MCFG_VIA6522_CA2_HANDLER(WRITELINE(swyft_state, via1_ca2_w))
+	MCFG_VIA6522_CB2_HANDLER(WRITELINE(swyft_state, via1_cb2_w))
+	MCFG_VIA6522_IRQ_HANDLER(WRITELINE(swyft_state, via1_int_w))
+MACHINE_CONFIG_END
+
+/* ROM definition */
+ROM_START( swyft )
+	ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
+	ROM_SYSTEM_BIOS( 0, "v331", "IAI Swyft Version 331 Firmware")
+	ROMX_LOAD( "331-lo.u30", 0x0000, 0x8000, CRC(d6cc2e2f) SHA1(39ff26c18b1cf589fc48793263f280ef3780cc61), ROM_BIOS(1))
+	ROMX_LOAD( "331-hi.u31", 0x8000, 0x8000, CRC(4677630a) SHA1(8845d702fa8b8e1a08352f4c59d3076cc2e1307e), ROM_BIOS(1))
+	/* this version of the swyft code identifies itself at 0x3FCB as version 330 */
+	ROM_SYSTEM_BIOS( 1, "v330", "IAI Swyft Version 330 Firmware")
+	ROMX_LOAD( "infoapp.lo.u30", 0x0000, 0x8000, CRC(52c1bd66) SHA1(b3266d72970f9d64d94d405965b694f5dcb23bca), ROM_BIOS(2))
+	ROMX_LOAD( "infoapp.hi.u31", 0x8000, 0x8000, CRC(83505015) SHA1(693c914819dd171114a8c408f399b56b470f6be0), ROM_BIOS(2))
+	ROM_REGION( 0x4000, "pals", ROMREGION_ERASEFF )
+	/* Swyft PALs:
+	 * The Swyft has four PALs, whose rough function can be derived from their names:
+	 * TIMING - state machine for DRAM refresh/access; handles ras/cas and choosing whether the video out shifter or the 68k is accessing ram. also divides clock
+	 * DECODE - address decoder for the 68008
+	 * VIDEO - state machine for the video shifter (and vblank/hblank?)
+	 * DISK 3.5 - state machine for the floppy drive interface
+	 */
+	/* U9: Timing AMPAL16R4
+	 *
+	 * pins:
+	 * 111111111000000000
+	 * 987654321987654321
+	 * ??QQQQ??EIIIIIIIIC
+	 * |||||||||||||||||\-< /CK input - 15.8976mhz crystal and transistor oscillator
+	 * ||||||||||||||||\--< ?
+	 * |||||||||||||||\---< ?
+	 * ||||||||||||||\----< ?
+	 * |||||||||||||\-----< ?<also input to decode pal pin 1, video pal pin 1, source is ?>
+	 * ||||||||||||\------< ?
+	 * |||||||||||\-------< ?
+	 * ||||||||||\--------< ?
+	 * |||||||||\---------< ?
+	 * ||||||||\----------< /OE input - shorted to GND
+	 * |||||||\-----------? ?
+	 * ||||||\------------? ?
+	 * |||||\------------Q> /ROM_OE (to both eproms through jumper b1 and optionally j9 connector)
+	 * ||||\-------------Q? ?
+	 * |||\--------------Q? ?
+	 * ||\---------------Q> output to decode pal pin 2
+	 * |\----------------->? output? to ram multiplexer 'A' pins
+	 * \------------------< ?
+	 */
+	ROM_LOAD( "timing_b.ampal16r4a.u9.jed", 0x0000, 0xb08, CRC(643e6e83) SHA1(7db167883f9d6cf385ce496d08976dc16fc3e2c3))
+	/* U20: Decode AMPAL16L8
+	 *
+	 * pins:
+	 * 111111111000000000
+	 * 987654321987654321
+	 * O??????OIIIIIIIIII
+	 * |||||||||||||||||\-< TIMING PAL pin 5
+	 * ||||||||||||||||\--< TIMING PAL pin 17
+	 * |||||||||||||||\---< 68008 R/W (pin 30)
+	 * ||||||||||||||\----< 68008 /DS (pin 29)
+	 * |||||||||||||\-----< 68008 E (pin 38)
+	 * ||||||||||||\------< 68008 A19
+	 * |||||||||||\-------< 68008 A18
+	 * ||||||||||\--------< 68008 A17
+	 * |||||||||\---------< 68008 A16
+	 * ||||||||\----------< ?
+	 * |||||||\-----------> ?
+	 * ||||||\------------? 68008 /VPA (pin 39)
+	 * |||||\-------------> /ROM_OE (to both eproms through jumper b1 and optionally j9 connector)
+	 * ||||\--------------? ?
+	 * |||\---------------? ?
+	 * ||\----------------? ?
+	 * |\-----------------? goes to j9 connector pin 5
+	 * \------------------< ?
+	 */
+	ROM_LOAD( "decode_e.ampal16l8.u20.jed", 0x1000, 0xb08, CRC(0b1dbd76) SHA1(08c144ad7a7bbdd53eefd271b2f6813f8b3b1594))
+	ROM_LOAD( "video_2b.ampal16r4.u25.jed", 0x2000, 0xb08, CRC(caf91148) SHA1(3f8ddcb512a1c05395c74ad9a6ba7b87027ce4ec))
+	ROM_LOAD( "disk_3.5c.ampal16r4.u28.jed", 0x3000, 0xb08, CRC(fd994d02) SHA1(f910ab16587dd248d63017da1e5b37855e4c1a0c))
+ROM_END
+
+/* Driver */
+
+/*    YEAR  NAME  PARENT  COMPAT   MACHINE    INPUT    DEVICE         INIT     COMPANY   FULLNAME       FLAGS */
+COMP( 1985, swyft,0,      0,       swyft,     swyft,   driver_device, 0,       "Information Applicance Inc", "Swyft", MACHINE_NOT_WORKING | MACHINE_NO_SOUND)