diff --git a/src/drv/drvAb.h b/src/drv/drvAb.h
new file mode 100644
index 000000000..c473e6115
--- /dev/null
+++ b/src/drv/drvAb.h
@@ -0,0 +1,317 @@
+/* ab_driver.h */
+/*share/src/drv @(#)ab_driver.h	1.2     6/7/91 */
+/* header file for the Allen-Bradley Remote Serial IO
+ *
+ * Author:	Bob Dalesio
+ * Date:	6-21-88
+ *
+ *	Experimental Physics and Industrial Control System (EPICS)
+ *
+ *	Copyright 1991, the Regents of the University of California,
+ *	and the University of Chicago Board of Governors.
+ *
+ *	This software was produced under  U.S. Government contracts:
+ *	(W-7405-ENG-36) at the Los Alamos National Laboratory,
+ *	and (W-31-109-ENG-38) at Argonne National Laboratory.
+ *
+ *	Initial development by:
+ *		The Controls and Automation Group (AT-8)
+ *		Ground Test Accelerator
+ *		Accelerator Technology Division
+ *		Los Alamos National Laboratory
+ *
+ *	Co-developed with
+ *		The Controls and Computing Group
+ *		Accelerator Systems Division
+ *		Advanced Photon Source
+ *		Argonne National Laboratory
+ *
+ * Modification Log:
+ * -----------------
+ * .01	02-01-89	lrd	added IFE module support
+ *				changed max chan from 8 to 16
+ * .02	04-24-89	lrd	moved AB_* to module_types.h
+ *				added bit to config table for attempting 
+ *				initialization
+ * .03	01-30-90	lrd	add plc/adapter distinction
+ *
+ */
+/* NOTES:							
+ * 1. We are using double slot addressing which dictates that there is an 
+ *    output slot for each input slot. 
+ *    Slots 1,3,5,7,9,11 are input slots
+ *    Slots 2,4,6,8,10,12 are output slots 
+ *    The database uses card numbers 0-11 to address slots 1-12
+ * 2. This code has not been tested for more than one link (6008). More
+ *    extensive modifications are required to implement this
+ */
+
+/* osw - operating status word definitions */
+#define	PROGRAM_MODE	0x01		/* program/reset mode */
+#define TEST_MODE	0x02		/* test/reset mode */
+#define RUN_MODE	0x04		/* run mode */
+#define DEBUG_MODE	0x08		/* we are debugging */
+#define UNSOLICITED_BT	0x10		/* detected block xfer we didn't want */
+#define BTS_QUEUED	0x20		/* block xfers queued */
+#define ADAPTER_FAULT	0x40		/* at least one faulted adapter in scan
+					   list */
+#define ADAP_FLT_CHNG	0x80		/* a change has occurred in an adapter's
+					   status...do link status check */
+#define OSW_MASK	0xdf		/* these are the bits of interest */
+
+/* commands to the 6008 link controller */
+#define AUTO_CONF	0x10
+#define SCAN_LIST	0x11
+#define SET_UP		0x13
+#define SET_MODE	0x20
+#define	LINK_STATUS	0x21
+
+/* block transfer command definitions */
+#define AB_READ		0x01
+#define AB_WRITE	0x02
+
+/* these are used for the SET_UP command */
+#define DEF_RATE	0x01		/* default baud rate 57.6K */
+#define FAST_RATE	0x02		/* 115.2 KB */
+#define NO_CHANGE	0xff		/* no change */
+#define AB_IL		0x05		/* interrupt level */
+#define DEBUG		0x01		/* debug - turn off watchdog timer */
+#define AB_INT_ENABLE	0x00		/* interrupt enabled */
+#define AB_SYSFAIL_DISABLE	0x01	/* disable  VMEbus SYSFAIL signal */
+
+/* status returned through the dual ported memory */
+#define SCANNER_POWERUP	0x90		/* power up status */
+#define BT_ACCEPTED	0x2f		/* block trans accepted by scanner */
+#define	BT_TIMEOUT	0x23		/* block transfer timeout */
+
+/* clock equates */
+#define	SECOND		60		/* 60 ticks per second */
+
+/* DUAL PORTED MEMORY AREA DEFINITION */
+/* mail box definition */
+struct dp_mbox {
+	unsigned short conf_stat;	/* confirmation status word */
+	unsigned short command;		/* command word */
+	unsigned short address;		/* module address */
+	unsigned short bt_tag;		/* block transfer tag number */
+	unsigned short resv[9];		/* 18 bytes reserved */
+	unsigned char  dummy;
+	unsigned char  fl_lock;		/* semaphore word byte */
+	unsigned short data_len;	/* length of data sent/returned */
+	union {
+		unsigned short wd[64];	/* 64 words of data */
+		unsigned char bd[128];	/* or 128 bytes of data */
+	} da;
+};
+
+/* entire region with the mailbox */
+struct ab_region {
+	unsigned char oit[128];		/* output image table */
+	unsigned char iit[128];		/*  input image table */
+	unsigned short osw;		/* operating status word */
+	struct dp_mbox mail;		/* dual port mail box */
+	unsigned short gda[1872-66];	/* unused part gen data area */
+	unsigned short	sys_fail_set1;	/* first byte to set for recovering from SYSFAIL */
+	unsigned short	sys_fail_set2;	/* second byte to set for recovering from SYSFAIL */
+	unsigned char vmeid[60];	/* scanner id */
+	unsigned short sc_intr;		/* to interrupt the scanner */
+	unsigned short sc_pad;		/* last word in scanner shared mem */
+};
+
+/* Allen-Bradley IO configuration array equates */
+#define AB_NOT_INIT	0x0000
+#define AB_NO_CARD	0xffff
+#define AB_CARD_TYPE		0x001f
+#define AB_INTERFACE_TYPE	0x00e0
+#define	AB_CONVERSION		0x0f00
+#define AB_PLC			0x1000
+#define AB_SENT_INIT		0x2000
+#define AB_UPDATE		0x4000
+#define AB_INIT_BIT		0x8000
+
+/* interface types */
+#define AB_NOT_ASSIGNED 0x0000
+#define AB_BI_INTERFACE 0x0020
+#define AB_BO_INTERFACE 0x0040
+#define AB_AI_INTERFACE 0x0060
+#define AB_AO_INTERFACE 0x0080
+
+
+/* scale data - 16 bit min and a 16 bit max */
+struct	ascale	{
+	unsigned short	a_min;
+	unsigned short	a_max;
+};
+
+/* defines and structures for analog outputs	*/
+/* configuration word 5 for the OFE module			*/
+/*	FxxxHHHHLLLLPPPP					*/
+/*		F - Data Format					*/
+/*			0x0 specifies BCD			*/
+/*			0x1 specifies Binary			*/
+/*		HHHH - Max Scaling Polarity			*/
+/*		LLLL - Min Scaling Polarity			*/
+/*		PPPP - Value Polarity				*/
+#define	OFE_BINARY	0x8000		/* talk binary instead of BCD	*/
+#define	OFE_SCALING	0x0000		/* all positive			*/
+
+struct	ab1771ofe_write{
+	unsigned short	data[4];	/* data to write */
+	unsigned short	conf;		/* config word */
+	struct ascale	scales[4];	/* min & max scaling */
+};
+
+/* defines and structures for analog inputs       */
+/* confgiuration word 0 for the IL module:			*/
+/*	7766554433221100					*/
+/*		00 - Signal Range for Channel 0			*/
+/*			0x0 specifies 1 - 5 Volts DC		*/
+/*			0x1 specifies 0 - 5 Volts DC		*/
+/*			0x2 specifies -5 - +5 Volts DC		*/
+/*			0x3 specifies -10 - +10 Volts DC	*/
+/*		11-77 - Signal Ranges for Channels 1 - 7	*/
+#define IL_RANGE	0xffff	/* volt inp for all channels -10 - 10V */
+
+/* configuration word 1 for the IL module			*/
+/*	00000DD000000000					*/
+/*		DD - Data Format				*/
+/*			0x0 specifiesBinary Coded Decimal	*/
+/*			0x2 specifies 2s compliment binary	*/
+/*			0x3 specifies signed magnitude binary	*/
+#define IL_DATA_FORMAT	0x600		/* signed magnitude binary */
+
+/* configuration word 2 for the IL module			*/
+/*	HHHHHHHHLLLLLLLL					*/
+/*		HHHHHHHH - Sign Bits for each of the max scaling value	*/
+/*		LLLLLLLL - Sign Bits for each of the min scaling value	*/
+#define IL_MAX_SCALING_SIGN	0	/* max scale is always positive */
+#define IL_MIN_SCALING_SIGN	0xff	/* min scale is always negative */
+#define IL_MAX_SCALE		itobcd(4095)	/* max scale is +4095 */
+#define IL_MIN_SCALE		itobcd(4095)	/* min scale is -4095 */
+#define IL_SCALE_SIGN	((IL_MAX_SCALING_SIGN << 8) | IL_MIN_SCALING_SIGN)
+#define IL_SCALE	((IL_MAX_SCALE << 8) | IL_MIN_SCALE)
+
+struct	ab1771il_config {
+	unsigned short	ranges;		/* range for all channels */
+	unsigned short	conf;		/* config word */
+	unsigned short	signs;		/* scaling bits for sign */
+	struct ascale	scales[8];	/* min & max for 8 channels */
+};
+
+struct	ab1771il_read {
+	unsigned short	diag;	/* diagnostic word */
+	unsigned short	urange;	/* low byte - under range channels */
+	unsigned short	orange;	/* low byte - over  range channels */
+	unsigned short	sign;	/* low byte - polarity 1 = negative */
+	short		data[8];	/* 8 data values (can be signed) */
+};
+
+/* confgiuration word 0  and 1 for the IFE module:		*/
+/*	7766554433221100					*/
+/*	1514131211109988					*/
+/*		00 - Signal Range for Channel 0			*/
+/*			0x0 specifies 1 - 5 Volts DC		*/
+/*			0x1 specifies 0 - 5 Volts DC		*/
+/*			0x2 specifies -5 - +5 Volts DC		*/
+/*			0x3 specifies -10 - +10 Volts DC	*/
+/*		11-15 - Signal Ranges for Channels 1 - 15	*/
+#define IFE_RANGE	0xffff	/* volt inp for all channels -10 - 10V */
+
+/* configuration word 2 for the IFE module			*/
+/*	00000DDT 00000000					*/
+/*		DD - Data Format				*/
+/*			0x0 specifiesBinary Coded Decimal	*/
+/*			0x2 specifies 2s compliment binary	*/
+/*			0x3 specifies signed magnitude binary	*/
+/*		T - Input Type					*/
+/*			0x0 specifies single ended		*/
+/*			0x1 specifies differential		*/
+#define IFE_DATA_FORMAT	0x700		/* signed magnitude binary/ differential */
+#define IFE_SE_DATA_FORMAT 0x600	/* signed magnitude binary/ single-ended */
+
+/* configuration word 3 for the IFE module			*/
+/*	LLLLLLLLLLLLLLLL					*/
+/*		LLLLLLLL - Sign Bits for each of the min scaling value	*/
+#define IFE_MAX_SCALING_SIGN	0	/* max scale is always positive */
+#define IFE_MIN_SCALING_SIGN	0xff	/* min scale is always negative */
+#define IFE_MAX_SCALE		itobcd(4095)	/* max scale is +4095 */
+#define IFE_MIN_SCALE		itobcd(4095)	/* min scale is -4095 */
+#define IFE_SCALE_SIGN	((IFE_MAX_SCALING_SIGN << 8) | IFE_MIN_SCALING_SIGN)
+#define IFE_SCALE	((IFE_MAX_SCALE << 8) | IFE_MIN_SCALE)
+
+struct	ab1771ife_config {
+	unsigned short	range1;		/* range for all channels */
+	unsigned short	range2;		/* range for all channels */
+	unsigned short	conf;		/* config word */
+	unsigned short	minsigns;	/* scaling bits for sign */
+	unsigned short	maxsigns;	/* scaling bits for sign */
+	struct ascale	scales[16];	/* min & max for up to 16 channels */
+};
+
+struct	ab1771ife_read {
+	unsigned short	diag;	/* diagnostic word */
+	unsigned short	urange;	/* low byte - under range channels */
+	unsigned short	orange;	/* low byte - over  range channels */
+	unsigned short	sign;	/* low byte - polarity 1 = negative */
+	short		data[16];	/* 16 data values (can be signed) */
+};
+
+
+/* defines and structures for thermocouple inputs */
+/* configuration word 0 for the IXE module:			*/
+/*	SSSSSFFCUxxxxTTT					*/
+/*		TTT - Thermocouple Type				*/
+/*		xxxx - Not Used					*/
+/*		U - Update cold junction 3/sec to calibrate	*/
+/*		C - Conversion into degrees F or C		*/
+/*		FF - Data Format				*/
+/*		SSSSS - Sample Time				*/
+
+/* xxxxxxxxxxxxxTTT - Thermocouple Types			*/
+#define IXE_MILLI	0x0000		/* Millivolt input */
+#define IXE_E		0x0001		/* "E" Thermocouple */
+#define IXE_J		0x0002		/* "J" Thermocouple */
+#define IXE_K		0x0003		/* "K" Thermocouple */
+#define IXE_T		0x0004		/* "T" Thermocouple */
+#define IXE_R		0x0005		/* "R" Thermocouple */
+#define IXE_S		0x0006		/* "S" Thermocouple */
+
+#define K_DGF   2
+#define K_DGC   3
+#define J_DGF   4
+#define J_DGC   5
+
+
+/* xxxxxxxCxxxxxxxx - Conversion into degrees F or C */
+#define	IXE_DEGC	0x0000
+#define IXE_DEGF	0x0100
+
+/* xxxxxFFxxxxxxxxx - Data Format */
+#define IXE_BCD		0x0000		/* data is BCD */
+#define IXE_2SCOMP	0x0200		/* twos complement binary data */
+#define IXE_SIGNED	0x0400		/* signed magnitude  "     "   */
+
+/* SSSSSxxxxxxxxxxx - Scan Rate */
+#define IXE_HALFSEC		0x2800		/* sample time = 0.5 seconds */
+#define IXE_1SEC		0x5000		/* sample time = 1.0 seconds */
+#define IXE_2SECS		0xa000		/* sample time = 2.0 seconds */
+#define IXE_3SECS		0xf000		/* sample time = 3.0 seconds */
+
+/* configuration data transfer to the IXE card */
+struct ab1771ixe_config {
+	unsigned short	conv_rate;	/* conversion and scan rate data */
+	unsigned short	alarm_enable;	/* low byte = channel alarm enable */
+	unsigned short	limit_polarity;	/* low & hi alarm polarity bits */
+	struct ascale	alarm_limits[8];/* low & hi alarm values */
+	unsigned short	calibration[8];	/* gain & zero correction values */
+};
+
+#define IXE_STATUS	0xff
+struct ab1771ixe_read {
+	unsigned short	pol_stat;	/* status - polarity word */
+	unsigned short	out_of_range;	/* under - over range channels */
+	unsigned short	alarms;		/* inputs outside alarm limits */
+	short		data[8];	/* current values */
+	unsigned short	cjcw;		/* cold junction cal word */
+};
+