Program:	RK05WL.COM

Abstract:	Utility for inserting/extracting RK05 images from Wilson
		Labs Zips

Author:		John Wilson <wilson@dbit.com> (no relation!)

Release date:	14-Nov-1998

Description:	RK05WL is a program to pack/unpack RK05 disk images to/from
		Zip disks written using the Wilson Labs RK05-to-SCSI bridge
		box.  Its main purpose is to obtain disk image files for
		use with the Ersatz-11 PDP-11 emulator, but it could also
		be used as an easy way to transfer files between a
		Wilson-equipped PDP-11 and a PC (for all I know there may
		already be such a utility supplied with the box but I don't
		have it, and Wilson wasn't very forthcoming with
		information since apparently they view D Bit as a
		competitor).

Usage:		The utility isn't particularly polished since it's intended
		for one-time use.  If you have an ongoing need for this
		program, contact D Bit about the possibility of rolling this
		functionality into PUTR.COM and/or Ersatz-11 (but it probably
		won't happen if nobody asks, too much clutter).

		This program doesn't access the Zip directly;  it requires a
		96 MB DOS file with a snapshot of the Zip.  This snapshot may
		be taken using PUTR.COM (http://www.dbit.com/pub/putr/) as
		follows (GUEST.EXE or a DOS ASPI driver must be installed for
		accessing the Zip drive):

		C:\>putr
		(PUTR version banner)
		(C:\)>   (PUTR's prompt)
		(C:\)>mount x: scsi5: /foreign
		(note: use actual Zip SCSI target number instead of 5)
		(C:\)>copy/file/dev x: zip.dsk
		(creates a 96 MB image file named ZIP.DSK)
		(C:\)>quit
		C:\>

		Transferring the image file back onto the Zip disk is similar,
		except the COPY command is the other way around:

			(C:\)>copy/file/dev zip.dsk x:

		RK05WL will extract any of the 24 RK05 volumes on the Zip
		as follows:

			RK05WL +/-n zipfile rkfile

		Where:
		+/-	+ to insert the RK05 image into the Zip image
			- to extract the RK05 image from the Zip image
		n	decimal volume number 0-23 (each Zip disk holds 24
			virtual RK05 volumes)
		zipfile	96 MB Zip disk image file (ZIP.DSK in above example)
		rkfile	2.5 MB RK05 disk image file (will be created if
			extracting)

		Example:

		C:\>rk05wl -14 zip.dsk vol14.dsk

		will extract volume 14 from ZIP.DSK and write it to VOL14.DSK

		C:\>rk05wl +14 zip.dsk vol14.dsk

		will insert it back in (presumably after processing on the PC
		using Ersatz-11 or PUTR)

Messages:	RK05WL will display error messages if it encounters any
		errors in processing (file I/O error, missing/invalid header,
		bad checksum).  If no error occurs it completes silently.

Notice:		Ersatz-11 is a trademark of D Bit.  Wilson Labs is probably
		a trademark of Wilson Labs.  RK05 might be a trademark of
		Digital Equipment Corporation.