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From: flinton@eagle.wesleyan.edu
Newsgroups: comp.sys.hp
Subject: HP-82973-A vs. i486/25 conflicts ? any known ?
Message-ID: <1991Apr25.223534.42202@eagle.wesleyan.edu>
Date: 26 Apr 91 03:35:33 GMT
Organization: Wesleyan University
Lines: 22

Cast of characters: one HP 82973A HP-IL Interface with default address 1700,
	         in one ALR 486/25 Model 40 "BusinessVEISA" under MSDOS 4.01,
            driving one HP 9114B HP-IL 3.5" portable floppy drive box.

Problem: at full speed (25 MHz), the ALR announces Read or Device errors
when attempting to access the 9114.  Sometimes it complains of INT 24 error.

At the ALR's slowest speed, the DIR D: command works, but TYPE and
COPY D:<filename> CON: both bomb out, either with error messages as before,
or by displaying patent nonsense.  (D: is the drive letter assigned the 9114.)	

Is there a known maximum processor speed beyond which the 82973 gives up?
Is there a revised HPIL.SYS for use with versions of DOS later than 2.0?
Should I choose a better address for the 82973 board, or modify its IRQ choice?
Are there other known gotcha's (or fixes) I should be aware of?

Mail replies must be best -- if interest warrants, I'll post a summary of 
advice received.  Many thanks.		-- Fred

Fred E.J. Linton  Wesleyan U. Math. Dept.  649 Sci. Tower  Middletown, CT 06457
FLINTON@eagle.Wesleyan.EDU ,  FLINTON@WESLEYAN.BITNET ,  fejlinton@attmail.com
Tel.:         + 1 203 776 2210 (home)  or  + 1 203 347 9411 x2249 (work)