HP9835 ROM questions

[dfnr2]

Hi all,

I just picked up a HP9835a. It needs some TLC (including drive service), but otherwise comes up and works. I would like to get it set up with disk (or HPDrive.). I have 9885 and 9895 drives, as well as an HPdrive station, and the 98034A HPIB interface. However, I don't have the required mass storage ROM(s).

I'm wondering if anyone has any info on the pinout of the ROM drawers. It looks like Ansgar Kückes has the ROM images on his remarkable hp9845.org site, so I'm wondering if there is a way to build a ROM module replacement.

Also, I happened to already have a 9835 test ROM and the matchine test RAM module. I was hoping I could use it to check out the machine and also dump it to contribute. However, when I boot with the test ROM installed, the system does absolutely nothing, even after hitting the STOP key. I suspect (unfortunately) a bad ROM, but am curious if anyone has any experience with this ROM. The system works fine with test RAM installed alone.

Also, if anyone has any extra mass storage or test ROM modules they would be willing to sell, I would be very interested!

This may be slightly outside the "calculator" umbrella, but this may be the best concentration of HP expertise, so I figured I'd post here before trying the classiccmp list.

Thanks!

Dave