E wjm 19-aug-1997: PK2KDRVR & assorted patches to system programs, V1.2   J Changes over initial version: Add fixes, plus one more check, for several - 				cases of bad register usage in PKNDRIVER.   $ 	*** This is for VMS V5.5-2 only ***  6 PK2KDRVR is a driver for the Vs2000/uVAX2000 SCSI port4 (traditionally known as the "tape controller port").  5 	>>> EXPERIMENTAL software, NO WARRANTIES at all! <<<   5 Apart from the restriction mentioned next, it _ought_ 7 to behave just like the Vs3100 SCSI driver (PKNDRIVER); 8 the SCSI host adapter will have SCSI id 0 (not 6 or 7!).   Known restriction:2 	PK2KDRVR won't do data transfers of 16kB or more.  / 	This has the effect of limiting the block size 0 	that can be used with SCSI tapes, and also will8 	break any program that _attempts_ to read 16kB or more.7 	The only VMS program that does so (which I'm aware of) ! 	is DUMP - see below for a patch.      Disclaimer: 3 	This is *EXPERIMENTAL* SOFTWARE that theoretically 6 	*could* not only crash your system, but *could* cause6 	CORRUPTION on all media connected to the computer on  	which it's installed.6 	(In fact, PK2KDRVR has plenty of code that *attempts*4 	to crash the system if a chance for corruption gets4 	noticed, but the Vs2000/uVAX2000 hardware has never2 	been "qualified" by anyone to work correctly with 	SCSI devices.)    	>>> NO WARRANTIES at all! <<<     Installation & use:   $ 	*** This is for VMS V5.5-2 only ***  ? 	The "binary kit" contains PK2KDRVR.EXE (not spelled PK2KDRIVER ; 	for quite "technical" reasons) plus 5 patch command files.   + 	Place PK2KDRVR.EXE in SYS$LOADABLE_IMAGES.    	Use 		$ PATCH @2KSYSGEN.COM 1 	to create 2KSYSGEN.EXE in the current directory.   7 	>>> Make sure that no MUA0 shows up, and that TVDRIVER : 	>>> (the Vs2000/uVAX2000 magtape driver) is _not_ loaded.  6 	>>> NOTE that the SCSI host adapter has the SCSI id 0; 	>>> (quite different from standard assignement of 6 or 7).    	Use' 		$ MCR [dir]2KSYSGEN AUTOCONFIGURE ALL 3 	to load PK2KDRVR (ought to show up as device PKA0) ; 	and autoconfigure the SCSI devices, just like on a Vs3100.   7 	If you're confident enough in the driver that you want 5 	the machine to auto-configure the SCSI at boot time, 7 	create two more programs (which _may_ only be required % 	if the machine is a cluster member),   . 		2KSTACONFIG.EXE via $ PATCH @2KSTACONFIG.COM2 	plus	2KCONFIGURE.EXE via $ PATCH @2KCONFIGURE.COM  	 	and copy ' 		2KSYSGEN.EXE to SYS$SYSTEM:SYSGEN.EXE - 		2KSTACONFIG.EXE to SYS$SYSTEM:STACONFIG.EXE - 		2KCONFIGURE.EXE to SYS$SYSTEM:CONFIGURE.EXE   4 	Each of these programs supposedly behaves just like6 	the VMS "original", when executed on a VAX other than 	a Vs2000 or uVAX2000.    9 	For completeness' sake, there are two more patch command ; 	files that create PK2K-aware versions of STASYSGEN.EXE and ; 	STANDCONF.EXE . Both of these are only used by stand-alone 7 	BACKUP - in order to build a PK2K-aware kit, place the : 	patched programs into SYS$SYSTEM under the original name,7 	and modify SYS$UPDATE:STABACKIT-TABLE.DAT by replacing 9 	"TVDRIVER.EXE" with "PK2KDRVR.EXE". You may also wish to < 	change STABACKIT.COM such that it accepts generic SCSI tapeA 	(devtype 28) and on that occasion make it refer to a differently > 	named *-TABLE.DAT - I did find a non-DEC DAT drive from which7 	a Vs2000 did boot, with the tape configured as MKA100.  	   8 	Lastly, there's 2KDUMP.COM which will create 2KDUMP.EXE 	via	$ PATCH @2KDUMP.COM  ; 	Use the result instead of the original SYS$SYSTEM:DUMP.EXE 9 	in order to DUMP blocks from a SCSI tape drive, e.g. via   ( 		$ DEFINE/USER DUMP dev:[dir]2KDUMP.EXE 		$ DUMP MKAu00:  D 	or similar. Contrary to standard DUMP, 2KDUMP will - independent ofE 	hardware - read at most 16k-1 bytes per tape block (no big deal :-).     & Wolfgang J. Moeller, <moeller@gwdg.de>