12 Sep
2010
12 Sep
'10
3:16 p.m.
The rom's on my HP 9845B are getting unstable when the machine is heating
up, they're giving errors.
Ansgar Kueckes from <http://www.hp9845.net> www.hp9845.net has a very nice
solution, the design for a replacement board using flash memory.
Is this a replacement for a ROM module (the SIM-like thing that goes into
the ROM drawer), the ROM drawer PCB, an internal HP845 PCB, or what?
The first would be the best IMHO in that it keeps the machine as original
as possible, It's known that some 3rd party ROM modules for the 9845
didn't use the HP hybrid circuits, they used normal DIL ICs on a little
PCB. There is just enough space for a 0.6" wide package...
It includes the pcb desing, I asked him permission to
use his design and
produce a certain amount of PCB's and to sell them for cost price to other
collectors. He agreed, the more I order the cheaper the price will be, so
who wants a PCB for his HP 9845 ?
More info on the project at : http://www.hp9845.net/9845/projects/romboard/
I will take a look. I am not in a position to spend much money at the
moment, but depending on the final price I might be interested.
-tony