Wanted: HP 21MX boards

[mloewen]

I'm looking for a couple of boards to get my 2109E configured for running
RTE-IVB or RTE-6VM:

12747A 128KB Memory Module (1 or 2)

12731A Memory Expansion Module

12791A Firmware Expansion Module

If anyone has any spares, please respond privately with your asking price.
If you know of any sources BESIDES Crisis Computer, Monterey Bay Communications
or Alanté, I'd also be interested. Thanks.

 

[mloewen]

I'm set for memory modules and firmware board, but I still need a 12731A Memory Expansion Module.

 

[Chuckster_in_Jax]

The 21MX is so rare now. What boot device\media are you using?

Pictures would be nice!

 

[mloewen]

The 21MX is so rare now. What boot device\media are you using?

Pictures would be nice!

Eventually, I will be booting this from a HPDrive HP-IB emulator:

http://www.hp9845.net/9845/projects/hpdrive/

Here are pictures of my system:

http://sturgeon.css.psu.edu/~mloewen/Oldtech/HP1000/

 

[Chuckster_in_Jax]

Thanks for posting the great pics! Brings back memories. As I remember, the 21MX came standard with only 16K of memory and maxed out at 64K. It was a real workhorse at the time.

I remember seeing a post on the HPDrive emulator awhile back but had forgotten about it. That could be a real lifesaver for these old systems.

The 21MX we had used a terminal like the 2645A with those small data cassettes to boot from. They weren't very reliable :

http://www.hpmuseum.net/exhibit.php?hwimg=240

Good luck with your project and keep us posted.