Dave, Unfortunately, my situation is similar to yours - my machine was one of three that had been used for research and product development by an audio products manufacturer. I received an Option 100

It's a "burden" I'm happy to live with - the Computerarium sits in the woods on a rural site with a quiet lake nearby. Once the collection is fully resident there, I plan to make it my primary residen

Pretty much, except for that treacherous French machine in the foreground. :>). Same color scheme, more windows. The Computerarium is in the back. :>( Jack

Thanks - I've never seen the insides of a 9845A before.

I had to spend some time at the hpmuseum site to learn why a digitizer would need a vacuum puck but now I guess I understand. Steve, were you involved with the group at the product definition stage? W

Now that I've been able to work with a physical 9845, the MAME 9845 emulator and HPDrive, I've got some questions about the various revisions of the HP Mass Storage ROM (09845-65516). I've found docum

All very helpful, thanks - though your first reply implying that negated functions were included in a non-listed ROM sounded a little bit like some obscure double-indirect indexed VAX mode. :>) I also

Thanks!

Since I'm setting up a second hpdrive machine, I did a fresh download of HPDrive, v 4.0, RC1. Listed in the version history, I see that 4.0 beta4 added "basic support for CEC488 driver". Does this inc

The Sprague datasheet shows the two negative leads are directly connected to each other, so a two-lead equivalent should work, but I have no personal experience with this substitution. Here's a "close

I'm up to reconditioning the tape drives on my 9845 and wonder if the same procedures used on the 9825 and 85 apply? Is there room to do the DC 2000 modification or does the physical design limit the

Ok - so no special procedures for the 9845. Thanks! BTW, you mention "grinding down the rubber" in your lathe - what tool do you use to reach the correct diameter?

Yes, super useful - I've been pretty successful with the Plastibands in preparing blank tapes but haven't done restoration of old tapes yet. Thanks!

Martin, I really like your idea about using eBay as a website for exhibiting a personal collection! Jack

It's been a good weekend. I found a box containing an envelope of 9810 programming cards and my CEC USB adapter. The 9810 card reader project will have to wait, but I loaded the latest (?) version of

"A 9825 with access to two tape drive peripherals could with an HPL program and the KRCB binary could duplicate any DC-100. Need idea huh?" Yes - that's the one many of us have been waiting for! Final

SSS definitely had source code, but I don’t know whether it was from HP or their own disassembly. I’m pretty sure their 9845 source was discarded but I _may_ have some 9825 disks hidden away. I’ll try

Apparently, I've put my SSS source code discs in a very safe place, since I have yet to find them. During my search, however, I did discover a notebook labeled "Subset/80 For Small Hard Discs And Flex

OK, I'll get going on scanning these. The SS/80 won't be bad, since it's loose sheets. The CS/80 will mean spending a bit of time with the flatbed scanner. Dave, will you be at VCF-West this year? Bob

Thanks Paul! I'm glad somebody is keeping track of what I'm doing. Definitely saves me from needing to find the ADF scanner again! :>) But now I guess I have to do the flat-bed thing. Jack P.S. Any id