While troubleshooting the first version of a clone prototype of the programmable ROM Drawer I found a mistake on the schematics I previously uploaded. I...
I recently fixed a pair of HP-85's, besides the classic gummy capstan on the tape drive the timing belts on the printer were also degraded, one of the printers...
Jorge wrote... JA> Also the clone prototype based on TTL/CMOS parts seems to be JA> working fine, I've it under test on a 85A, I'll try later on JA> other...
... Yes, I've been trying to find some 36 pin edge connectors and just do an extender board similar of what you can still find for some pc's. The problem is...
Hi, A new batch of PRM-85 boards has recently been made by Bill. I currently have one tested and working board available (the rest are reserved to people on...
Hi, I learned the following from Jan Schiefer earlier today, and have confirmed it with my own set-up. ... Following this email I set up the following...
john_vc2004 wrote... j> Question for Everett then: what's the explanation here please? Does j> the EMS ROM on the 85B rely on the EMC or something else special...
... May be an experiment worth to try is to read the Mass Storage ROM from the HP-85B and burn that image on the EPROM instead of the original 00085-15001 Mass...
Hello John and all the List members, ... PMR-85!!! I would be very interested in any solution, as seems other people are. It was too nice to be true, I guess...
... Thanks for the suggestion Jorge. The 85B Mass Storage ROM was captured as part of Olivier De Smet's Series 80 emulator project. The file you need is...
... I blew this file to EPROM (the 85B Mass Storage ROM) in a Prog ROM Module in place of the standard 85A Mass Storage ROM, now on boot up the 85A says 'Error...
... Sorry for the very late reply to this (as no-one else has). I openned up my 82900A module (the CP/M System module) and yes this has a ROM labelled...
john_vc2004 wrote... j> The 'proper' reverse-engineering solution would be to re-write the 85B j> EMS ROM for the 85A, this would involve disassembling the 85B...
... Thanks for the guidance on this. This evening I set up the following which worked OK: 85A + EMS + I/O + Mass Storage from 85B + EDISK from 85B + 9122C I...
Sorry I made an error in my previous posting regarding PRM-85 ... * the last line should be 'jumper from 4 to 12', not 20 as I wrote before. Pin 4 is the DIP...
Hello John, Thanks for your GREAT work on this! <snip> ... <snip> Would somebody be so kind to prepare a binary image for that new SuperROM?. I have so many...
... Thank you Jose. ... SuperROM?. I ... would like ... I've finally got around to creating a new PRM-85 SuperROM for the HP-85A with the 85B versions of the...
Hi John, ... THANKS A LOT!!!. I have, starting today, some holidays and will be very happy to try this :-) I will let you know my results which should be as...
... Cristie ... cassette ... what's on it, ... Dear Bill I have a few old tape drives here in the UK. I guess the tape you have is similar to a DC2000 series...
Assume that two people want to exchange HP-85 software on tapes (one of them does not have a floppy drive so tapes are the last resort). Each of them has...
Juergen, There is some tolerance against capstand wear, when a tape is unit is frequently used the capstand rubber igets a little thinner by the presure of the...
Rik, thank you for your comments. Before spending hours and hours with copying software to tapes I wanted to get some confidence that it is not a wasted...
I have a 9121 and a 9133 device, both with 3 1/2 inch floppy drive(s). I can read/write floppies with both, my HP-85 (plus MASS STORAGE) and my HP-86. But I...
Jürgen, What kind of disc's are you using ? You need to use DD disc's , some times you need them to "preformat" / erase under MSDOS with [format a: /f:720...
Rik, thank you much for your quick response. ... Yes, I use DD discs. I tried to preformat them under DOS but it did not make any change. ... I waited for more...
Jürgen wrote... ... That tickles my memory somehow. The original disc drives available for the Series 80 were the 5 1/4" floppy drives. The 3 1/2" diskette ...
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