After the power-less reset the device has to be functional on it's own. It has to boot, leave some kb for RAM and the rest
(if you have the 1MB model
) for drive_c-emulation.
This has to work out all without any doing from you. If not then you have a damaged hardware and cannot do anything without soldering.
Fdisk will do you no good because the hardware
("drive_C" and RAM space
) inside the HP is all emulated. The hardware base of the complete machine is one single 1MB static RAM
(and some ROM, of course, for the firmware
) and therefore it has to go back to it's initial state if you leave it powerless long enough.
Back in 1990 there was no flash RAM as we use it today
(even the PSION-flash was a different technology
) and all mobile devices used only that kind of memory when there was not enough power for D-RAM.
The PCMCIA connector back then was only type I and only used for this little SRAM memory expansion cards which were quite expensive, needed an internal backup battery and were only available up to a few MB.
They are quite rare today and really expensive at ebay or whereever.
I bought my first of there cards for my HP95 back in 1993. 1MB for around 600USD, directly ordered by UPS-mail in Chicago. At that time there was a massive price gap for computer memory between Europe and US and even with import taxes it was half the price I would have paid in Germany.
With UPS it was here within 4 days, that was quicker then some german mail ordering services
That was international trade around 1990, kids
With a fax machine, a real credit card and UPS.
Edited by dl1av 2024-04-01 3:07 PM
