Wanted: ROM images from HP 9895, 82901/82902, and other HP-IB disk drives

[Mike Stein]

Looks like my ROMs are the first ones in your 
list, 80 A7 in the first two bytes (drives are 
9114As).

I'll send you the image anyway, just in case.

m

----- Original Message ----- 
From: "Eric Smith" <spacewar at gmail.com>
To: "General Discussion: On-Topic and Off-Topic
Posts" <cctalk at classiccmp.org>
Sent: Wednesday, September 02, 2015 3:50 PM
Subject: Re: Wanted: ROM images from HP 9895,
82901/82902, and other HP-IB disk drives


> On Wed, Sep 2, 2015 at 8:00 AM, Mike Stein
> <mhs.stein at gmail.com> wrote:
>> The ROMs in my 9114s are 09114-15514 REV R.
>> Need an image? What type/size are they?
>
> There 27128 (16KB).
>
> There are at least five known ROM images for the
> 9114A/B, and I have
> images of two of them.  I'm not sure whether
> 09114-15514 Rev R matches
> one that I already have.  If you don't mind
> dumping it, that will be
> appreciated.  After I've collected a few of
> these, I'll put them up on
> a web page and post the URL to the list, in case
> anyone else needs
> them.
>
> John R. Baker established a precedent for using
> the contents of the
> first two bytes to identify the 9114 firmware
> revision; I don't know
> with certainty that that actually uniquely
> identifies all revisions.
>
> John wrote an HP-71B program to read the first
> two bytes over HP-IL.
> It should be possible to read the entire
> contents over HP-IL, but I've
> found it easy to pull the EPROM and read it with
> an EPROM programmer.
>
> John identified five firmware versions:
>
> 09114-15514A  first two bytes 80 a7  - from
> 9114A
> 09114-15514B  first two bytes ad fc   - probably
> from 9114A
> 09114-15515    first two bytes d8 b1   - not
> sure which model
> 09114-15516    first two bytes da dc   - not
> sure which model
> 09114-15521    first two bytes 10 8d   - from
> 9114B
>
> I have images whose first two bytes match
> the -15514A and -15521,
> courtesy of another list member, though I don't
> know the exact HP P/Ns
> that were on the labels. The -15514 image I have
> has the first two
> bytes 80 a7, matching the -15514A in John's
> list, and has a checksum
> (sum of all the bytes, modulo 64K) of 81ce.
>  The -15521 image I have
> matches the one in John's list, and has a
> checksum of 112a.
>
> Some years ago I did a fair bit of study of a
> disassembly of a 9114A
> ROM image, but unfortunately seem to have
> misplaced the results. I'm
> not sure whether I'll do it again.  IIRC it had
> a few more DDT and DDL
> commands than were defined in the Filbert
> (82161A tape drive) command
> set, and it also had an entirely different
> command set which I later
> found out was SS/80, for use by the HP 110
> Portable and Portable Plus.