Looking for the JIMROM 1H
|
08-04-2022, 10:04 AM
Post: #1
|
|||
|
|||
Looking for the JIMROM 1H
For historical reasons I'm looking for the ROM that came with the HHP-16K 41C ROM Emulator designed by Jim DeArras in 1981.
The HHP-16K came with a set of EPROMS containing the JIMROM 1H. I've not been able to find any copy of this rom on the usual repositories. So I would like to know if someone still have this EPROM set and would like to share their content. |
|||
08-04-2022, 12:01 PM
Post: #2
|
|||
|
|||
RE: Looking for the JIMROM 1H
Gerry Schultz had in 2007 a HHP-16K unit with the JIMROM and the documentation → HERE
|
|||
08-04-2022, 09:50 PM
Post: #3
|
|||
|
|||
RE: Looking for the JIMROM 1H
Thanks Sylvain, I’ve sent a mail to Gerry. In the meantime if anybody has a way to access to the JIMROM EPROMs image I’m very interested.
|
|||
08-05-2022, 02:35 PM
Post: #4
|
|||
|
|||
RE: Looking for the JIMROM 1H
Hi Didier,
Seeing your dilemma, I had a quick look at my old bunch of ROMs, I did not find the old JIMROM 1H, but did find that this one has many of the same routines: FILE FORMAT: MOD1 TITLE: PPC/MELBOURNE ROM VERSION: PART NUMBER: AUTHOR: COPYRIGHT (c) LICENSE: COMMENTS: CATEGORY: Custom peripheral HARDWARE: None MEMORY MODULES: 0 EXENDED MEMORY MODULES: 0 ORIGINAL: Yes - unaltered APPLICATION AUTO UPDATE: No - do not update this file NUMBER OF PAGES: 1 ROM NAME: PPC-MELB ROM ID: PR2C PAGE: May be in more than one location POSITION: Any page 8-F PAGE GROUP: 0 - not grouped BANK: 1 BANK GROUP: 0 - not grouped RAM: No WRITE PROTECTED: No or Not Applicable FAT: Yes XROM: 12 FCNS: 38 XROM Addr Function Type 12,00 C50A PPC ROM 2C 4K MCODE Programmable 12,01 C55D X<>ROM 4K MCODE Programmable 12,02 C56B Y<>T 4K MCODE Programmable 12,03 C576 Z<>T 4K MCODE Programmable 12,04 C581 Y<>Z 4K MCODE Programmable 12,05 C58E BCDBIN 4K MCODE Programmable 12,06 C59D GTOROM 4K MCODE Programmable 12,07 C5A2 RXR 4K MCODE Programmable 12,08 C5AA RXL 4K MCODE Programmable 12,09 C5B2 X+Y 4K MCODE Programmable 12,10 C5BE SXL 4K MCODE Programmable 12,11 C5C7 NSTO 4K MCODE Programmable 12,12 C5E3 NRCL 4K MCODE Programmable 12,13 C50D TP 4K MCODE Programmable 12,14 C535 VP 4K MCODE Programmable 12,15 C602 CODE 4K MCODE Programmable 12,16 C63F DECODE 4K MCODE Programmable 12,17 C683 EN 4K MCODE Programmable 12,18 C6C2 DE 4K MCODE Programmable 12,19 C707 CLPV 4K MCODE Nonprogrammable NULLable 12,20 C71E XROMTST 4K MCODE Programmable 12,21 C7C4 MELBROM 1A 4K MCODE Programmable 12,22 C7CA PSIZE 4K MCODE Programmable 12,23 C803 PPACK 4K MCODE Programmable 12,24 C808 DIS 4K MCODE Programmable 12,25 C857 2-D 4K MCODE Programmable 12,26 C867 1-D 4K MCODE Programmable 12,27 C88A KEY 4K MCODE Programmable 12,28 C898 PKEY 4K MCODE Programmable 12,29 C8A1 X>Y?? 4K MCODE Programmable 12,30 C8AD CHR$ 4K MCODE Programmable 12,31 C8BA NUM 4K MCODE Programmable 12,32 C8DF RDEL 4K MCODE Programmable 12,33 C8F4 R$ 4K MCODE Programmable 12,34 C8FF L$ 4K MCODE Programmable 12,35 C91C LDEL 4K MCODE Programmable 12,36 C928 RHASTO 4K MCODE Programmable 12,37 C935 CLRKEY 4K MCODE Programmable INTERRUPT VECTORS: Pause loop: 000 Main running loop: 000 Deep sleep wake up, no key down: 000 Off: 000 I/O service: 000 Deep sleep wake up: 000 Cold start: 000 CHECKSUM: 16C (Correct - Same as Computed Value) According to that old Gerry Schultz post, it noted some routines as 'SXL, NSTO, NRCL, TP and VP. These routines look pretty simple but there is a long letter at the end of the documentation from John McGechie written on January 12, 1982.' Which are all on the PPC/MELBOURNE ROM, I hope this helps. DA |
|||
08-05-2022, 03:45 PM
(This post was last modified: 08-05-2022 03:48 PM by Didier Lachieze.)
Post: #5
|
|||
|
|||
RE: Looking for the JIMROM 1H
Thanks Derek, yes I'm aware of the PPC-MELB ROM, which is a derivative of the JIMROM with added functions from the PPC members in Australia. There is also the Melbourne ROM that was created before the PPC-MELB.
These roms while being built from the JIMROM that came with the HHP-16K don't seem to include an exact copy of the JIMROM m-code even if they include almost all the JIMROM functions. At that time m-code was pretty new and people were experimenting with it, burning new EPROM versions quite regularly. So I'm still looking for the original image of the JIMROM 1H. |
|||
08-05-2022, 08:03 PM
Post: #6
|
|||
|
|||
RE: Looking for the JIMROM 1H
Have you tried contacting Jim DeArras himself? He's no longer active in the HP calculator user community, but he's very much alive (and very active on Facebook), still lives in Virginia, and he might have kept a copy of his own software. PM me for contact info (I will not post it here).
<0|ɸ|0> -Joe- |
|||
08-05-2022, 09:20 PM
Post: #7
|
|||
|
|||
RE: Looking for the JIMROM 1H
Thanks Joe, PM sent.
|
|||
06-21-2024, 02:14 PM
Post: #8
|
|||
|
|||
RE: Looking for the JIMROM 1H
My quest for the elusive JIMROM has come to an end. I recently got an HHP-16K 41C ROM Emulator containing the original JIMROM EPROM set. The image of this ROM which is AFAIK the first ever mcode user ROM is now on its way to the well known hp41 repository.
|
|||
06-21-2024, 02:37 PM
Post: #9
|
|||
|
|||
RE: Looking for the JIMROM 1H
(06-21-2024 02:14 PM)Didier Lachieze Wrote: My quest for the elusive JIMROM has come to an end. I recently got an HHP-16K 41C ROM Emulator containing the original JIMROM EPROM set. The image of this ROM which is AFAIK the first ever mcode user ROM is now on its way to the well known hp41 repository. Thanks for your efforts to preserve this ROM! Did you also succeed to get the documentation referenced in the post by Gerry Schultz? |
|||
06-21-2024, 02:53 PM
(This post was last modified: 06-21-2024 02:54 PM by Didier Lachieze.)
Post: #10
|
|||
|
|||
RE: Looking for the JIMROM 1H
I don’t have the original documentation provided with the HHP-16K for this ROM, however using John Mc Gechie articles in PPC TN, as well as other sources I documented the different functions from the JIMROM, the Melbourne ROM, the PPC ROM 2 and the TOULROM as they share the same origins: JIMROM > MELBOURNE > PPC ROM 2 > TOULROM. I’ve also sent this document to Warren.
|
|||
06-22-2024, 02:30 AM
Post: #11
|
|||
|
|||
RE: Looking for the JIMROM 1H
Well done Didier, nice work to capture a truly rare beast in the wild!!
Also, nice analysis to have determined the genesis and evolution of these early MCODE projects, filling in some gaps in this formative stage of 41 exploration. --Bob Prosperi |
|||
06-23-2024, 05:47 PM
Post: #12
|
|||
|
|||
RE: Looking for the JIMROM 1H
The files are now available on Warren’s site.
|
|||
06-24-2024, 09:27 AM
Post: #13
|
|||
|
|||
RE: Looking for the JIMROM 1H
This is amazing stuff, Didier, thank you so much for preserving and sharing this with everyone!!
Cheers, PeterP |
|||
06-25-2024, 08:43 PM
Post: #14
|
|||
|
|||
RE: Looking for the JIMROM 1H | |||
« Next Oldest | Next Newest »
|
User(s) browsing this thread: