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101090 discussions

Help needed to read 5.2GB DVD-RAM Type 1 cartridges - UK

by PeksaDO＠cardiff.ac.uk

Can anyone help with this - A colleague (doing voluntary work) is trying to retrieve data archived on cartridges as per subject. Does anyone have a drive he can borrow or buy; can someone read them for him etc? If anyone can help, e-mail me directly and I'll put you in touch. Have seen a couple of drives on ebay.com but none on ebay.co.uk. As per my e-mail address, Cardiff area. Note - I read cctalk in digest mode. TIA. Doug.

10 years, 10 months

And speaking of ALGOL

by mark.kahrs＠gmail.com

I assure you Chuck, I do know the original B5500 ALGOL having written my first program on one. For those of you who might be interested, I sent a listing of the B6700 ALGOL compiler source code to the CHM. I'm surprised no one has mentioned the Burroughs extensions to ALGOL to optimise|ize the use of the native string instructions.

10 years, 10 months

R: Re: Writing 8" floppies with SuperCard Pro

by supervinx＠libero.it

Older DOS utils like IMD or TELEDISK knew better about 8" disks and precompression, directly accessing the controller. If the Supercard software has been written with no 8" disks support it will be hard to manage writes correctly. My two cents -------- Messaggio originale -------- Da: supervinx <supervinx at libero.it> Data:13/08/2015 08:28 (GMT+01:00) A: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Oggetto: R: Re: Writing 8" floppies with SuperCard Pro He told me there's no Linux support. I should try Keirf's utils or access the hardware with a serial connection. May be I could try the Supercard in a VM. -------- Messaggio originale -------- Da: supervinx <supervinx at libero.it> Data:13/08/2015? 08:25? (GMT+01:00) A: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Oggetto: R: Re: Writing 8" floppies with SuperCard Pro Hi! A bit OT. I tried the fdadap card successfully reading and writing SD and DD disks, together with a standard ISA controller. Had to try a bit, since not every disk controller manages SD writes.? So the FDADAP should be ok, and the problems lie on the Supercard side. I contacted the Supercard guy, in order to know if there's a Linux support. I've no windows machines, only some specialized DOS one. -------- Messaggio originale -------- Da: John Foust <jfoust at threedee.com> Data:13/08/2015? 04:46? (GMT+01:00) A: cctalk at classiccmp.org Oggetto: Re: Writing 8" floppies with SuperCard Pro At 07:27 PM 8/11/2015, Josh Dersch wrote: >Thus far I've been successful in creating images of floppies, but less successful in writing them back out.? Thus far I've tried a pair of Shugart 851s and a Qume QumeTrack 842.? I'm using a DBit FDADAP (http://www.dbit.com/fdadap.html) to deal with cabling and the TG43 signals. I'd tried the SuperCard Pro / FDADAP combo last March with no success. I hope to return to the task.? Maybe it was a problem with my drive(s). - John

10 years, 10 months

R: Re: Writing 8" floppies with SuperCard Pro

by supervinx＠libero.it

He told me there's no Linux support. I should try Keirf's utils or access the hardware with a serial connection. May be I could try the Supercard in a VM. -------- Messaggio originale -------- Da: supervinx <supervinx at libero.it> Data:13/08/2015 08:25 (GMT+01:00) A: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Oggetto: R: Re: Writing 8" floppies with SuperCard Pro Hi! A bit OT. I tried the fdadap card successfully reading and writing SD and DD disks, together with a standard ISA controller. Had to try a bit, since not every disk controller manages SD writes.? So the FDADAP should be ok, and the problems lie on the Supercard side. I contacted the Supercard guy, in order to know if there's a Linux support. I've no windows machines, only some specialized DOS one. -------- Messaggio originale -------- Da: John Foust <jfoust at threedee.com> Data:13/08/2015? 04:46? (GMT+01:00) A: cctalk at classiccmp.org Oggetto: Re: Writing 8" floppies with SuperCard Pro At 07:27 PM 8/11/2015, Josh Dersch wrote: >Thus far I've been successful in creating images of floppies, but less successful in writing them back out.? Thus far I've tried a pair of Shugart 851s and a Qume QumeTrack 842.? I'm using a DBit FDADAP (http://www.dbit.com/fdadap.html) to deal with cabling and the TG43 signals. I'd tried the SuperCard Pro / FDADAP combo last March with no success. I hope to return to the task.? Maybe it was a problem with my drive(s). - John

10 years, 10 months

R: Re: Writing 8" floppies with SuperCard Pro

by supervinx＠libero.it

Hi! A bit OT. I tried the fdadap card successfully reading and writing SD and DD disks, together with a standard ISA controller. Had to try a bit, since not every disk controller manages SD writes.? So the FDADAP should be ok, and the problems lie on the Supercard side. I contacted the Supercard guy, in order to know if there's a Linux support. I've no windows machines, only some specialized DOS one. -------- Messaggio originale -------- Da: John Foust <jfoust at threedee.com> Data:13/08/2015 04:46 (GMT+01:00) A: cctalk at classiccmp.org Oggetto: Re: Writing 8" floppies with SuperCard Pro At 07:27 PM 8/11/2015, Josh Dersch wrote: >Thus far I've been successful in creating images of floppies, but less successful in writing them back out.? Thus far I've tried a pair of Shugart 851s and a Qume QumeTrack 842.? I'm using a DBit FDADAP (http://www.dbit.com/fdadap.html) to deal with cabling and the TG43 signals. I'd tried the SuperCard Pro / FDADAP combo last March with no success. I hope to return to the task.? Maybe it was a problem with my drive(s). - John

10 years, 10 months

Naked minis

by useddec＠gmail.com

I was having problems sending these to some members, so i'm trying to post them. https://drive.google.com/folderview?id=0B2MOaRm-6XKNfkxxZ0ZMZldZUGh0SjVMWHA…

10 years, 10 months

Writing 8" floppies with SuperCard Pro

by jhfinedp3k＠compsys.to

I forgot to mention one item. Since I had VERY few Double Sided media with the index hole offset that extra 1/2" from the Single Sided index hole - and I have many RX02 compatible floppy media which are Single Sided with the index hole in the wrong place for being a Double Sided media - I added a DPDT switch to the sense circuit of the DSD 880/30 drive. In the normal position, the Single Sided floppy media are detected as Single Sided floppy media. In the opposite position, a Single Sided floppy media is detected as Double Sided and the DSD 880/30 is then able to read / write both sides of the floppy media. Since the DSD 880/30 is also able to perform a LLF (Low Level Format), I am able to use all of the RX02 media as Double Sided WITHOUT the inconvenience of having to punch the extra index hole. >Jerome H. Fine wrote: > >Josh Dersch wrote: > >> Here at the museum I'm evaluating the use of a SuperCard Pro >> (http://www.cbmstuff.com/proddetail.php?prod=SCP) to archive and >> duplicate 8" floppies from various machines. It's not technically >> supported (the manual states that it *should* work but has not been >> tested, etc.) The disks I'm reading are nothing exotic (They're >> standard double-density, double-sided disks with an IBM format -- I >> could use a PC and ImageDisk to do the job, but the SuperCard is very >> convenient, in theory...) >> >> Thus far I've been successful in creating images of floppies, but >> less successful in writing them back out. Thus far I've tried a pair >> of Shugart 851s and a Qume QumeTrack 842. I'm using a DBit FDADAP >> (http://www.dbit.com/fdadap.html) to deal with cabling and the TG43 >> signals. (And the 851s are jumpered properly for the TG43 signal, as >> far as I can tell). I've also tried a variety of media (Verbatim, >> Maxell) with the same results (though the position of the bad data >> varies from attempt to attempt). >> >> The issue is that upon reading back a disk that has been written via >> the SuperCard, data is fine up until about cylinder 60, at which >> point bad sectors start appearing more and more frequently (though >> most of the data is still OK). I tried disabling TG43 just to see if >> it made a difference, and it does - with TG43 disabled sectors >> written past cylinder 43 read back as garbage. >> >> I'm running short of ideas. Anyone else have any experience with >> this combo? Any suggestions on troubleshooting tips? > > I doubt that this suggestion will help, but it might be > useful for what are called RX03 compatible media. > > The RX02 drive from DEC was emulated in hardware > by DSD (Data Systems Design). DSD Produced a > drive which was named the DSD 880/30 which consisted > of 3 * RL02 internal drives and a single floppy drive which > could read IBM Single Density and DEC Double Density > floppy media. The DEC names for those two floppy media > were RX01 and RX02. The actual DEC RX02 drive was > able to read in both Single Density and Double density modes. > In the case of the DEC RX01 and DEC RX02 drives, they > were both Single Sided. Further DEC did at one point intend > to support a Double Sided drive which I understand was to > be called the DEC RX03, but it was never released that I > ever heard about. The software support was specifically > included in V04.00 of RT-11 in the file DY.MAC, but was > probably never tested since the code was incorrect. By > V05.00 of RT-11, DY.MAC no longer contained the extra > code to support Double Sided media. > > DSD extended the support and the DSD 880/30 contained > an RX03 compatible drive which could read Double Density > Double Sided media. What I don't know is IF the physical > characteristics of the Double Density media which DEC and > DSD supported are identical to the Double Density physical > characteristics of the floppy media to which you refer as having > "an IBM format" since I have never encountered any floppy > media from IBM other than Single Sided / Single Density. > > To make matters simple IF the floppy media which you have > are compatible with DEC RX02 Double Density format, then > with the DSD RX03 floppy drive, I extended the DY.MAC > file for RT-11 and it now supports reading a Double Sided / > Double Density floppy mounted in a DSD RX03 drive. If > you can manage to locate a DSD 880/30 and controller to > run on a DEC PDP-11/73 with RT-11, then I can make the > DYX.SYS device driver available. To first make sure that > everything will work with the DSD 880/30, you can test your > floppy to see if a DEC RX02 can at least read the first side of > your floppy. > > Please let me know if you know the answer to if your Double > Sided / Double Density floppy media are DEC RX02 compatible > on at least the first side. If that is true, then the DSD 880/30 > drive will probably be able to read both sides very easily. > > If you have any questions, please ask. > > Jerome Fine

10 years, 10 months

Writing 8" floppies with SuperCard Pro

by jfoust＠threedee.com

At 07:27 PM 8/11/2015, Josh Dersch wrote: >Thus far I've been successful in creating images of floppies, but less successful in writing them back out. Thus far I've tried a pair of Shugart 851s and a Qume QumeTrack 842. I'm using a DBit FDADAP (http://www.dbit.com/fdadap.html) to deal with cabling and the TG43 signals. I'd tried the SuperCard Pro / FDADAP combo last March with no success. I hope to return to the task. Maybe it was a problem with my drive(s). - John

10 years, 10 months

Writing 8" floppies with SuperCard Pro

by JoshD＠LivingComputerMuseum.org

Here at the museum I'm evaluating the use of a SuperCard Pro (http://www.cbmstuff.com/proddetail.php?prod=SCP) to archive and duplicate 8" floppies from various machines. It's not technically supported (the manual states that it *should* work but has not been tested, etc.) The disks I'm reading are nothing exotic (They're standard double-density, double-sided disks with an IBM format -- I could use a PC and ImageDisk to do the job, but the SuperCard is very convenient, in theory...) Thus far I've been successful in creating images of floppies, but less successful in writing them back out. Thus far I've tried a pair of Shugart 851s and a Qume QumeTrack 842. I'm using a DBit FDADAP (http://www.dbit.com/fdadap.html) to deal with cabling and the TG43 signals. (And the 851s are jumpered properly for the TG43 signal, as far as I can tell). I've also tried a variety of media (Verbatim, Maxell) with the same results (though the position of the bad data varies from attempt to attempt). The issue is that upon reading back a disk that has been written via the SuperCard, data is fine up until about cylinder 60, at which point bad sectors start appearing more and more frequently (though most of the data is still OK). I tried disabling TG43 just to see if it made a difference, and it does - with TG43 disabled sectors written past cylinder 43 read back as garbage. I'm running short of ideas. Anyone else have any experience with this combo? Any suggestions on troubleshooting tips? Thanks, Josh Sr. Vintage Software Engineer Living Computer Museum www.livingcomputermuseum.org<http://www.livingcomputermuseum.org>

10 years, 10 months

Writing 8" floppies with SuperCard Pro

by jhfinedp3k＠compsys.to

10 years, 10 months

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