22 May
2016
22 May
'16
7:51 p.m.
On 05/21/2016 10:53 PM, David Collins wrote:
Martin, I might be able to help you as I think we have
a 7596A.
Are these EPROMs from the processor PCA? Are you able to tell me which 'U'
numbers they are in the PC board?
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
So I'm not sure if my manual is old and the plotters at that time had 4
EPROMs and yours is newer and has 2? Or are they on another PCA somewhere?
Let me know.
If the plotter we have is in the main museum facility I can possibly help
you, I will check.
David Collins
Curator
HP Computer Museum.
If your version has four EPROMs and the later (otherwise identical)
machine only used two then chances are the four earlier EPROMs were
simply combined into two later ones. For example, if the original EPROMs
were 2708s then two of those would fit into a single 2716. The 2716 was
easier to program as well being only a single voltage device.
Combining the images is easy as well. The first 2708 image goes from
000h to 3FFh and the second would go from 400h to 7FFh, as a 2716 holds
000h to 7FFh worth of data vs. 000h to 3FFh for the older 2708.
Of course this would also work for 2716s into 2732s, etc. just the data
boundaries change to reflect the device size.
John :-#)#
-----Original Message-----
From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Martin
Peters
Sent: Sunday, 22 May 2016 7:21 AM
To: cctalk at classiccmp.org
Subject: HP Draftmaster II 7596A: EPROM dumps needed, urgent :-(
Hello,
the EPROMs are labeled 07595-18045 and 07595-18046.
Can anyone do a dump for me? It's really urgent. Our local hackerspace wants
to get rid of it, if there is no chance to get the Firmware again.
greetings,
Martin
--
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, VideoGames)
www.flippers.com
"Old pinballers never die, they just flip out"