Looking for HP98034 / HP9895 ROM images

Paul Berger phb.hfx at gmail.com
Mon Oct 17 12:45:43 CDT 2016

On 2016-10-17 1:47 PM, Glen Slick wrote:
> On Mon, Oct 17, 2016 at 9:02 AM, F.Ulivi <fulivi at tiscali.it> wrote:
>> Hi everyone,
>> does anyone of you happen to have the images of the firmware ROM of
>> HP98034 module and/or of the HP9895 disk drive, please?
>> I'm working on implementing these devices on my MAME-based simulator of
>> HP9845B systems.
> Where is the firmware on the 9895A? Is it in a 24-pin DIP package mask
> ROM near the lower right corner of this picture?
> http://www.hpmuseum.net/images/09895-66500-26.jpg
> Hmm, looking in the service manual it appears there were several
> versions of the controller board. Some with multiple PROMs and some
> with a single ROM, and some with a Z80 and some with an MC2
> (micro-CPU, the '2' is a superscript).
> http://www.bitsavers.org/pdf/hp/disc/07902-90030_7902_9895_Svc_Jan81.pdf
> I have a 9895A. Don't know which version of the controller PCB it has
> without digging it out to take a look.
Yes that would be it the unpopulated positions would be for versions of 
the controller using smaller ROMs, The one I have is the 4 ROM version 
and I am pretty sure I dumped them, I just need to find out where.


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