Re: Flex Disc options for the HP 9825

iccmp.org" <cct...@classiccmp.org> Subject: Re: Flex Disc options for the HP 9825 Excellent news! I eagerly look forward to this so I can get my 9825T talking to my 9895A! If you spin a PC board, I will be willing to purchase one or two if you end up with extras or are willing to coordinate an order.

RE: Flex Disc options for the HP 9825

> -Oorspronkelijk bericht- > Van: cctech [mailto:cctech-boun...@classiccmp.org] Namens Paul Berger > Verzonden: zaterdag 10 december 2016 1:37 > Aan: General Discussion: On-Topic and Off-Topic Posts > Onderwerp: Re: Flex Disc options for the HP 9825 >

Re: Flex Disc options for the HP 9825

Excellent news! I eagerly look forward to this so I can get my 9825T talking to my 9895A! If you spin a PC board, I will be willing to purchase one or two if you end up with extras or are willing to coordinate an order.

Re: Flex Disc options for the HP 9825

Fantastic! Can't wait for the info. Marc > On Dec 9, 2016, at 4:36 PM, Paul Berger wrote: > > Some time ago there was a discussion about the elusive 98228A ROM that > supports both the 9885 and 9895 diskette drive units on a 9825T, well good > news! A fellow MoHPC member

Re: Flex Disc options for the HP 9825

Some time ago there was a discussion about the elusive 98228A ROM that supports both the 9885 and 9895 diskette drive units on a 9825T, well good news! A fellow MoHPC member David Ramsey very kindly loaned me his, and with a little careful reading of the service manual along with studying

Re: Flex Disc options for the HP 9825

] Namens Curious Marc >> Verzonden: zondag 14 augustus 2016 21:08 >> Aan: General Discussion: On-Topic Posts >> Onderwerp: Re: Flex Disc options for the HP 9825 >> >> Would you pictures of it and where it sits in the machine by any chance? >> Marc >> >

Re: Flex Disc options for the HP 9825

On Mon, Aug 15, 2016 at 9:25 AM, Rik Bos wrote: > No, they just blow the main fuse. > The thyristor is a 2N4441. > > -Rik > > Van: Paul Berger In my experience, 'blow the main fuse' is the usual approach with a crowbar - in other words, trigger the protection device that

RE: Flex Disc options for the HP 9825

No, they just blow the main fuse. The thyristor is a 2N4441. -Rik Van: Paul Berger

Re: Flex Disc options for the HP 9825

://flic.kr/p/L8SNPJ Done. -Rik -Oorspronkelijk bericht- Van: cctech [mailto:cctech-boun...@classiccmp.org] Namens Curious Marc Verzonden: zondag 14 augustus 2016 21:08 Aan: General Discussion: On-Topic Posts Onderwerp: Re: Flex Disc options for the HP 9825 Would you pictures of it and where

RE: Flex Disc options for the HP 9825

https://flic.kr/p/L8SNPJ Done. -Rik > -Oorspronkelijk bericht- > Van: cctech [mailto:cctech-boun...@classiccmp.org] Namens Curious Marc > Verzonden: zondag 14 augustus 2016 21:08 > Aan: General Discussion: On-Topic Posts > Onderwerp: Re: Flex Disc options for the HP 9825

RE: Flex Disc options for the HP 9825

Paul, It is a small extra pcb( with hp logo). Both my machines are build in Germany, which is logic because I’m living in the Netherlands and aquired both in Europe. So it could be a local modification made by the Boeblingen factory or even HP Netherlands. I’m happy with it -Rik Van: Paul

Re: Flex Disc options for the HP 9825

Would you pictures of it and where it sits in the machine by any chance? Marc Sent from my iPad > On Aug 14, 2016, at 10:22 AM, Rik Bos wrote: > > Paul, > > It is a small extra pcb( with hp logo). Both my machines are build in > Germany, which is logic because I’m living in

Re: Flex Disc options for the HP 9825

ny's diagrams (a lot of eexcellent work). > > -Rik > >> -Oorspronkelijk bericht- >> Van: cctech [mailto:cctech-boun...@classiccmp.org] Namens >> curiousma...@gmail.com >> Verzonden: zaterdag 13 augustus 2016 12:15 >> Aan: General Discussion: On-Topic Posts >

Re: Flex Disc options for the HP 9825

I wonder if the crowbars might have been a later revision of of the power supply. After the accident with my 9835A I had to completely rebuild the +12V regulator both the 723 and the pass transistor as well as a few passive components. I did not see any evidence of crowbars, and the power

RE: Flex Disc options for the HP 9825

t; Verzonden: zaterdag 13 augustus 2016 12:15 > Aan: General Discussion: On-Topic Posts > Onderwerp: Re: Flex Disc options for the HP 9825 > > Thanks for the info. Any schematics of the modification? > Marc > > > > On Aug 13, 2016, at 2:37 AM, Rik Bos <hp-...@xs4all.

Re: Flex Disc options for the HP 9825

On 13.08.2016 11:37, Rik Bos wrote: For what it's worth a small warning about the HP 9825 series computers. The power supply doesn't have a crowbar(over voltage protection), so a transistor failure in the Psu can be catastrophic. On the other hand the two 9835's I have, which uses the same form

RE: Flex Disc options for the HP 9825

For what it's worth a small warning about the HP 9825 series computers. The power supply doesn't have a crowbar(over voltage protection), so a transistor failure in the Psu can be catastrophic. On the other hand the two 9835's I have, which uses the same form factor and almost the same power

Re: Flex Disc options for the HP 9825

Thanks for the info. Any schematics of the modification? Marc > On Aug 13, 2016, at 2:37 AM, Rik Bos wrote: > > > For what it's worth a small warning about the HP 9825 series computers. > The power supply doesn't have a crowbar(over voltage protection), so a > transistor

Re: Flex Disc options for the HP 9825

p.org> Subject: RE: Flex Disc options for the HP 9825 Thanks, I didn't know, I grabbed the image. That offers a path if I can ever get an 9885 and single sides 8" discs... Marc -Original Message- From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Paul Berger On

Re: Flex Disc options for the HP 9825

ll come back to you. > > David Collins > Curator > > > -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of CuriousMarc > Sent: Saturday, 23 July 2016 5:40 PM > To: 'General Discussion: On-Topic and Off-Topic Posts' > <cctalk

Re: Flex Disc options for the HP 9825

On-Topic and Off-Topic Posts' > <cctalk@classiccmp.org> > Subject: RE: Flex Disc options for the HP 9825 > > Thanks, I didn't know, I grabbed the image. That offers a path if I can ever > get an 9885 and single sides 8" discs... > Marc > >> -Original Mess

RE: Flex Disc options for the HP 9825

...@classiccmp.org] On Behalf Of CuriousMarc Sent: Saturday, 23 July 2016 5:40 PM To: 'General Discussion: On-Topic and Off-Topic Posts' <cctalk@classiccmp.org> Subject: RE: Flex Disc options for the HP 9825 Thanks, I didn't know, I grabbed the image. That offers a path if I can ever get a

RE: Flex Disc options for the HP 9825

Thanks, I didn't know, I grabbed the image. That offers a path if I can ever get an 9885 and single sides 8" discs... Marc > -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Paul > Berger > On the hpmuseum.net page for the 98217A ROM here is an image

Re: Flex Disc options for the HP 9825

On 2016-07-22 9:17 PM, CuriousMarc wrote: Unfortunately, I have the older ROM, the HP 98217A. Says 9885 Flexible Disk Drive on it (duh). Only this 9885, single side low density 8" drive, connected with the parallel interface and a special cable is supported. And indeed as Tony says, to start

RE: Flex Disc options for the HP 9825

Unfortunately, I have the older ROM, the HP 98217A. Says 9885 Flexible Disk Drive on it (duh). Only this 9885, single side low density 8" drive, connected with the parallel interface and a special cable is supported. And indeed as Tony says, to start from a blank disk, you need a tape cartridge

Re: Flex Disc options for the HP 9825

Great info. I'm on travel but I will check which ROMs I have when I come back on Friday. Marc > On Jul 19, 2016, at 2:06 PM, tony duell wrote: > > > >> Probably a question for Tony's encyclopedic knowledge. I just >> scored two HP 9825, one a later "T" option and

Re: Flex Disc options for the HP 9825

On 2016-07-19 2:25 PM, tony duell wrote: There was only ever support for 8" diskette drives, and to support 9895 you need the second version of the Diskette ROM which appears to be very rare. I t sure would be nice if someone who has one of these ROMs would dump the contents or loan it to

Re: Flex Disc options for the HP 9825

On 2016-07-19 1:25 AM, Curious Marc wrote: Probably a question for Tony's encyclopedic knowledge. I just scored two HP 9825, one a later "T" option and one "B" version with all the fixings (i.e ROM packs). They both seem to work save the usual tape drive which I have not gotten to yet. Both

Re: Flex Disc options for the HP 9825

On 2016-07-19 2:06 AM, tony duell wrote: Probably a question for Tony's encyclopedic knowledge. I just scored two HP 9825, one a later "T" option and one "B" version with all the fixings (i.e ROM packs). They both seem to work save the usual tape drive which I have not gotten to yet. Both have