test-drb October 2007

test-drb@ccmp.vtda.org

228 participants
467 discussions

by dm561＠torfree.net

---------Original Message: Date: Fri, 12 Oct 2007 09:09:22 -0700 (PDT) From: Fred Cisin <cisin at xenosoft.com> Subject: RE: Extracting CDOS and CP/M) files > >Now that 22Disk and the rest of the tools have been exonerated, we can > >concentrate on ways to read the hard to read sectors - a ubiquitous > >problem with Cromemco disks. On Fri, 12 Oct 2007, M H Stein wrote: > Admittedly a problem when trying to read their disks with today's crippled > controllers, but their use of a common SD Track 0 meant that without any > . . . > It all just looks different from today's PC-centric perspective. No complaint about the idea of minimal first sector. The specific problem that I was referring to is the incompatability with trying to read Cromemco diskettes using an NEC 765 type controller, which needs a larger index gap, resulting problems reading the first sector of each track. ------------Reply: Tell me about it; went through 7 mobo/fdcs while trying to help Dave D; although some could write OK (which was all I really needed to recreate his images), I never did find one that could *read* using IMD or Uniform. Slowed down the drive, which sometimes helps, but still no good reads. That's why I keep at least one Cromemco system up & running; much easier to go the other way and copy to MSDOS disks on the Cromemco (or transfer files the old-fashioned RS-232 way). Nevertheless, just wanted to point out that their format wasn't quite such a dumb/bad thing as it seems from a PC POV; just too bad IBM picked the 765 instead of the 1793. BTW, that disk ID in track 0 is not *required*; if it's not found, the controller defaults to (stays in) SD/SS mode (although that doesn't mean that CDOS will be able to read your particular flavour of CP/M disk unless it's the IBM 8" "standard"). mike

18 years, 1 month

OS-9 sector sizes

by julesrichardsonuk＠yahoo.co.uk

Anyone know if OS-9 is guaranteed to use a certain sector size when resident on a hard disk? Or is it implementation-specific? ta J.

18 years, 1 month

Extracting CDOS and CP/M) files

by dm561＠torfree.net

Date: Thu, 11 Oct 2007 16:11:55 -0700 (PDT) From: Fred Cisin <cisin at xenosoft.com> Subject: Re: Extracting CDOS and CP/M) files >>> The blame was always hung on the disk compression, since that was what >>> people NOTICED being different; but the compression was NOT the problem. >On Thu, 11 Oct 2007, Jules Richardson wrote: >> Smartdrv was purely a disk cache, wasn't it? >Yes. But MICROS~1 was completely clueless what the risks were and how to >deal with them for WRITE caching (what happens if the power goes off, or a >disk error occurs before the cached stuff gets written?) Well, in all fairness if the power goes off just before or during a disk write I don't see how you could avoid problems without a battery backup or similar. >> The compression was something >> else... umm... doublespace? >Therein hangs a bizarre tale of conflict and betrayal between MICROS~1 and >Stac Electronics (billg said, "I'm having a bad day", when the court >awarded damages), and the differences between DOS 6.20, 6.21, 6.22. Not one of his finest moments fer sure... >>> Ah, the good old days. >> And then Windows came along... >Has anybody explained to Al Gore about how Windoze is the primary cause of >global warming? I KNEW IT! MICROSOFT IS RESPONSIBLE FOR GLOBAL WARMING! Now, how many ways are they going to make money out of it.... m

18 years, 1 month

Extracting CDOS and CP/M) files

by dm561＠torfree.net

>Date: Thu, 11 Oct 2007 13:05:52 -0700 (PDT) >From: Fred Cisin <cisin at xenosoft.com> >Subject: RE: Extracting CDOS and CP/M) files <snip> >Now that 22Disk and the rest of the tools have been exonerated, we can >concentrate on ways to read the hard to read sectors - a ubiquitous >problem with Cromemco disks. ----------- Admittedly a problem when trying to read their disks with today's crippled controllers, but their use of a common SD Track 0 meant that without any configuration changes the OS could concurrently and transparently read a mix of at least 8 different types of disks; not many systems of that day could do that. Want to copy your SDSS 8" disk to a DDDS 5" one? No problem. Friend or business partner has some data on SDSS 5" disks that you want on DDDS 8"? Just pop in the disks and copy away; add some software and you can even copy to/from MS-DOS disks if you must. Run Z80 CDOS/CP/M Wordstar on your 68000 Cromix+ CS-400? No sweat (although a different issue). Process your old CDOS data files with your UNIX software? Not much harder. It all just looks different from today's PC-centric perspective. mike

18 years, 1 month

data tape audio file archive

by dgriffi＠cs.csubak.edu

It seems that an audio file of the Sinclair tape will load fine. Now then, is there an archive of data tape audio files somewhere? Will I have to start one myself? -- David Griffith dgriffi at cs.csubak.edu

18 years, 1 month

Vintage computer photogallery - Time Magazine

by wbblair3＠yahoo.com

> http://www.time.com/time/photogallery/0,29307,1670168_1461055,00.html Nice. I'm going to have to buy that book. Here are some "Dinosaur Sightings: 1970s Computers": http://www.news.com/2300-1042_3-6213000-1.html?tag=ne.gall.pg ____________________________________________________________________________________ Catch up on fall's hot new shows on Yahoo! TV. Watch previews, get listings, and more! http://tv.yahoo.com/collections/3658

18 years, 1 month

Tony - was: SGI Onyx - Three Phase to Two Phase conversion

by dm561＠torfree.net

Date: Fri, 12 Oct 2007 08:06:36 -0600 From: Richard <legalize at xmission.com> Subject: Re: Tony - was: SGI Onyx - Three Phase to Two Phase conversion >In article <01C80C7E.C6F95220 at mandr71>, > M H Stein <dm561 at torfree.net> writes: >> [...] why waste any of it on preaching to the choir or the unenlightened >> foolish ones, as the case may be... >LOL, as if those are the only two choices. -- It sometimes sounds like they are, at least in Tony's view... m

18 years, 1 month

Compaticard 1 manual needed

by dm561＠torfree.net

Does anyone have (or can point me to) a scanned copy of the manual for a MicroSolutions Compaticard I by any chance? Also the drivers, in case the ones I have are for another version? Can't find mine and only found the IV on the 'Web. Would be much appreciated; TIA mike

18 years, 1 month

Purchase: DEC PDP11/93(whole system)

by spoon_813＠hotmail.com

Hello Paul Anderson, I want to purchase DEC PDP11/93 (1). Can I get a quote from you? If it is in stock, please reply me. What does it include? I mean how is the configuration? If it is 2MB how much? If it is 4MB how much? Thank you very much Regard Beijing KSD Electron Technical Service Center _________________________________________________________________ ????? MSN ?????????? http://mobile.msn.com.cn/

18 years, 1 month

Tony - was: SGI Onyx - Three Phase to Two Phase conversion

by dm561＠torfree.net

-------------Original Message: Date: Fri, 12 Oct 2007 00:16:58 +0100 (BST) From: ard at p850ug1.demon.co.uk (Tony Duell) Subject: Re: SGI Onyx - Three Phase to Two Phase conversion > Even Tony who has so often contributed valuable information seems > to be spending more of his time preaching and arguing his various > gospels lately... Although I read every message that appears here, I've found few threads recently that I can really contribute to. Of the current threads, I have no real knoweldge of RSX, I've never used CDOS (and I know little of disk imaging programs), and so on. Now, get a good hardware/repair thread going, nand it'll be difficult to stop me ;-) -tony -----------------Reply: True enough; most threads don't interest me either, and your comprehensive contributions on the hardware side (and occasionally even software) are greatly appreciated; thank you for giving us as much time on those as you do. However, by now we're all pretty well acquainted with your philosophy of hardware ownership, maintenance and repair, not only of computers but automobiles, cameras, watches & clocks, machine tools etc. as well. Life is short and there are so many things that need your restoring & repair skills; why waste any of it on preaching to the choir or the unenlightened foolish ones, as the case may be... mike

18 years, 1 month

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test-drb October 2007