[mod.computers.vax] Notes on the K&S TeX2.0 distribution

CUNNINGHAMR%HAW.SDSCNET@LLL-MFE.ARPA.UUCP (08/02/86)

A few more notes...

The .PXL files, as built by K&S, aren't directly compatible with Flavio Rose's
LN03 driver supplied on the same tape.  They require conversion (see section
9 of the LN03 driver .MEM file documentation), and the converted .PXL files
must be combined into one directory with extensions like .1500PXL.

As-is, the .PXL files (with the .PXL extension, divided up into directories by
magnification like [...1500]) work with most laser printers, you'd only have to
do this extra step if you're using LN03s. 

Curiously, there seems to be a noticeable difference in the characters produced
on our LN03 printers vs. our Imagen 12/300 (I'm using the QMS_FONTS for both).
To my (uneducated) eye, it's the Imagen 12/300 output that looks over-thin.
That's strange because both types of laser printers seem to have essentially
the same Ricoh engine.  Possibly there's something subtle that Imagen has
done to the 12/300?

In my previous note, I claimed:

>>The example installation keeps referring to SYS$SYSDISK.  That may be a
>>quasi-standard name for the system disk at some installations, but it's not a
>>VMS standard, and many sites don't so define their system disk. Using
>>SYS$SYSDEVICE instead should work nearly everywhere.

Ed McGuire noted:

>SYS$SYSDISK is defined by VMS on my cluster but not documented in DCL Concepts
>table 4-3.  It translates to to SYS$SYSROOT:.  My guess is that VMS used to
>use SYS$SYSDISK the way it now uses SYS$SYSROOT, prior to V3 when system roots
>were added, as the logical name for the structure containing the system
>directories.

>Using SYS$SYSDEVICE instead of SYS$SYSDISK may work for TeX, but they're not
>equivalent.  For example, there is guaranteed to be a SYS$SYSDISK:[SYSLIB] on
>every VMS system, but not a SYS$SYSDEVICE:[SYSLIB].

It looks like SYS$SYSDISK is defined by VMS for clusters only under VMS4.x. My
non-clustered (VMS4.3) systems don't have SYS$SYSDISK defined. I guess the
lesson is that when you go to install the K&S TeX2.0 distribution, don't follow
the documentation blindly.  Use whatever definition for you system disk (or
whever else you want to put it) that makes sense at your own site.

I'd also claimed:

>>In ``Step 7.'', adding TEX.HLP to the system help library, there should be a
>>caution that this should be done when there are no users on the system. If
>>someone is accessing the system help library while the update occurs, it is
>>possible that the system file can be scrambled (most VMS system administrators
>>know this, but mentioning it never hurts).

And Ed noted:

>I didn't know this.  I have been warned that LIBRARIAN can't add a .HLP file to
>the library if someone has the library open, but I thought that was the only
>bugaboo.

Which is, I believe, correct.  In any case, a bit of caution is indicated.