HP Draftmaster II 7596A: EPROM dumps needed, urgent :-(

David Collins davidk.collins at bigpond.com
Tue May 24 15:44:32 CDT 2016

Here's a link to the files I have.  I'll update this with the additional
images from Ethan when they are available and put a front end to the files
in the museum. 


David Collins

-----Original Message-----
From: David Collins [mailto:davidk.collins at bigpond.com] 
Sent: Wednesday, 25 May 2016 12:26 AM
To: 'General Discussion: On-Topic and Off-Topic Posts'
<cctalk at classiccmp.org>; 'martin at shackspace.de' <martin at shackspace.de>;
'Joachim Fenkes' <dojoe at dojoe.net>
Subject: RE: HP Draftmaster II 7596A: EPROM dumps needed, urgent :-(

Here are the binaries for all the EPROMs on processor PCA for my 7596A.  The
PCA part number is 07595-60100 and is different from the one in the manual
which is a 07595-60200 so I assume my PCA is older than the one in the

The EPROMs on the PCA are as follows:

17225-18001	U26
17225-18002	U35
17225-18003	U41
17225-18004	U42
07595-18097	U28
07595-18098	U37
Unknown	U27 - no part number label 
Unknown	U36 - no part number label

Binaries for each chip are attached. All are 27512 EPROMs.

I have also included photos of the PCA and the EPROMs in position.  Hope
that helps.

David Collins
HP Computer Museum

-----Original Message-----
From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Martin
Sent: Monday, 23 May 2016 5:50 AM
To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org>
Subject: Re: HP Draftmaster II 7596A: EPROM dumps needed, urgent :-(

Hi David!

David Collins:
> Martin, I might be able to help you as I think we have a 7596A.

Great! :)

> Are these EPROMs from the processor PCA?

I think so.

> Are you able to tell me which 'U'
> numbers they are in the PC board? 

No, not now. The plotter is in the shackspace in Stuttgart and I was not
there for several weeks and now I found an email saying they want to get rid
of it. I already asked for the dumps here one year ago and now it seems to
be really urgent.

> I haven't looked at the plotter itself, but the service manual we have 
> shows the following part numbers for the processor PCA
> 07595-18039
> 07595-18040
> 07595-18041
> 07595-18042

I know. As I was told by the guy who took a look inside one year ago, these
parts do not exist in the revision we own. But I think, they only put the
firmware in two EPROMs at HP in a newer revision of the board.
And if not "only", I think the dumps would be helpful anyway. It would be
great if you could do a dump for me :-)

Many thanks,
Martin Peters
martin at shackspace.de

More information about the cctalk mailing list