Anyone know anything about this HP41C RAM / EPROM ROM SIMULATOR?



#2

Anyone know anything about this HP41C RAM / EPROM ROM SIMULATOR?


#3

Nope, but it looks like a wonderful & historic piece of equipment. Thanks for the photo.

#4

That's for use with the HP SDS (Software Development System), which uses an HP-85 to develop ROM modules for the HP-41.

The HP-41 connector should have a cable wired to an otherwise empty HP-41 module.

I'm not sure what the HP-85 interface is. Possibly to an 82940A GPIO card, but that's only a guess.

The real trick will be finding the SDS software.


#5

So who used these items?


#6

It says "For internal use only" so presumably HP interns.


#7

Yes, but the HP-41 VASM listing indicate that a cross compiler on a HP64000 was used, at least initally. The HP-85 was not not really available at that time.

I also wonder about the box, it looks kind of like a real product, but they must have used less pretty hand built hardware internally?

It is also just a ROM emulator, surely they must have had a simulation environment as well?


#8

The HP64000 assembler for the Nut came about long after the 41 was designed and its ROMs written. There were earlier ROM emulators that were used for debugging.

The SDS was for development of third-party application modules, and did require the HP-85. Originally it did not support the development of microcode, though eventually they added the ability to use some HP-supplied microcode functions.


#9

What do HAE and PAE on the switches stand for? I'm guessing Hard Addressed (something) and Port Addressed (something).

Edited: 30 Sept 2011, 10:48 p.m.

#10

Quote:
I also wonder about the box, it looks kind of like a real product, but they must have used less pretty hand built hardware internally?
Not neccessarily, I have worked for big companies where such low volume or even one-off items were mounted in a nice box and had a custom vinyl or anodised aluminium face plate made.
(When I was a student on a 2 month "vacation work" assignment I was tasked to put such an item together).

#11

Quote:
I have worked for big companies where such low volume or even one-off items were mounted in a nice box ...

And this was HP in the 1970s/80s, a famously engineering driven company.

#12

They were used by people developing ROMs. My understanding is that HP never sold the SDS, but made it available to outside parties that were developing modules.

#13

amazing, a piece of history no doubt!

Edited: 30 Sept 2011, 2:25 p.m.


Possibly Related Threads...
Thread Author Replies Views Last Post
  42S with nonvolatile RAM Lyuka 5 355 12-13-2013, 08:52 AM
Last Post: Lyuka
  HP-70 simulator updated Willy R. Kunz 3 274 11-26-2013, 08:20 PM
Last Post: BShoring
  where can I get the HP Prime simulator? John Ioannidis 4 258 09-27-2013, 12:28 PM
Last Post: John Ioannidis
  Best way to test HP-71B RAM modules (the 32K/96K ones etc.)? Philippe Lasnier 4 379 09-25-2013, 09:54 AM
Last Post: Philippe Lasnier
  HP 2225D+ RAM failure/replacement Luca 4 294 09-10-2013, 01:46 PM
Last Post: Luca
  OT: EDSAC simulator Mike (Stgt) 2 189 08-20-2013, 07:27 AM
Last Post: Mike (Stgt)
  Yet another simulator Mike T. 3 209 08-05-2013, 07:10 AM
Last Post: Namir
  Questions about building a RAM card for hp 48 Waon Shinyoe (China) 0 161 07-09-2013, 09:53 PM
Last Post: Waon Shinyoe (China)
  HP-16C simulator fhub 12 543 06-30-2013, 10:14 PM
Last Post: Robert Prosperi
  HP-15C Simulator / Release 3.2.00, Build 5319 Torsten 10 482 05-11-2013, 05:19 PM
Last Post: Thomas Klemm

Forum Jump: