26 Feb
2022
26 Feb
'22
9:15 a.m.
On 2/25/2022 5:09 PM, Will Cooke via
cctalk wrote:
Thanks very much Paul, Will!
From info gleaned from this webpage
(especially the comments at bottom):
http://www.mattmillman.com/projects/hveprom-project/an-easy-to-build-mcs-48…
... indeed looks like there is a chance
the HP's 8048 could be read and possibly
programmed into an alternate part.
However, it's a daunting task in my
case. I'd first have to build a 8048
programmer/reader shield for an Arduino,
and then try to get my cracked 8048
successfully unsoldered from the HP
9915A motherboard, and then attempt to
get consistent reads from it -- a
special challenge due the crack.
As the chances of success are highly
improbable, looks like I'm SOL on this
particular motherboard.
Anyone have a HP 9915 they'd like to sell?
- John Singleton
On 02/25/2022
2:23 PM Paul Berger via cctalk<cctalk at classiccmp.org> wrote:
The 8048 is a mask programmed part, there is an EPROM version 8748.
While the 8048 is mask programmed I believe that the contents of the ROM
can be dumped.
As Paul said, the 8048 is mask programmed. However, I agree it is
readable. I "think" if you follow the "verify" step in the linked
datasheet you can read from the rom.
https://www.ceibo.com/eng/datasheets/Intel-8048-8049-8050-plcc-dip.pdf
Will