test-drb January 2013

test-drb@ccmp.vtda.org

222 participants
294 discussions

by michael.99.thompson＠gmail.com

> From: Terry Stewart <terry at webweavers.co.nz> > Date: Tue, 29 Jan 2013 00:02:48 +1300 > Subject: My BBC Model B on Youtube > The best of British in my collection. The capable and classy BBC Model > B Microcomputer System. > http://youtu.be/r9oAAcRk2Ys The Rhode Island Computer Museum has a BBC Model B Issue 4 in the British Collection. http://www.ricomputermuseum.org/Home/foreign-market-personal-computers/bbc-… -- Michael Thompson

11 years, 9 months

HP LIF floppy disks and bad sectors

by john_a_s2004＠hotmail.com

Hi, I have been reading about LIF format floppies, in particular as used on the HP Series 80 and 200. I found this description: ftp://ftp.hpmuseum.org/lif/lifutil/lif_over.txt an overview on MoHPC: http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/articles.cgi?read=24 and the HPDir utility: http://www.hp9845.net/9845/projects/hpdir/index.html Can anyone explain please how bad sectors are marked as 'spare' under LIF? The LIF overview states: "LIFUTIL cannot recognize "spared tracks" on a LIF disk. To explain ... when you format a LIF disk, not all the tracks may be good; so the formatting process marks them as "bad" or "spared" and they are not used. LIFUTIL is incapable of distinguishing a spared track from any other; so it will suck in the spared track along with any other tracks in the file or directory, leading to corrupted files or catalog reads." What I can't find is a description of the bytes encoded on the disk to mark a track as spare. One possibility is this is dealt with by the HP disk controller firmware, and so hidden to the operating system, which sees a LIF directory as per the above descriptions, without seeing the spare tracks. I am trying to find some floppies with spare tracks and then analyse them on a PC, hopefully someone has been there already and can shed some light on the mechanism used. Regards, John

11 years, 9 months

Top Posting, was Re: What was that old Amiga programming language...?

by marvin＠west.net

It is normally better to top post when only one idea is going to put forth. Of course, with all us old guys with short memories ... And of course, it is easier to complain/comment about top posting than the constant posts unrelated to the subject line :). > On 23 January 2013 00:14, Dan Gahlinger<dgahling at hotmail.com> wrote: >> >Yes, lots of games and stuff were done in ARexx, sound and images, etc. >> > >> >and btw quoting vrx/sexton as a source automatically disqualifies you > > We normally don't top-quote on this list. > > I don't even know who or what vrx/sexton is; I merely gave the top hit > or 2 from Google. > > -- > Liam Proven ? Profile:http://lproven.livejournal.com/profile

11 years, 9 months

Retroarchive.org update...

by geneb＠deltasoft.com

More goodies for the Don Maslin archive - I'm up to and including the "cpmprog" directory so far. Also, some SLR tools were added. g. -- Proud owner of F-15C 80-0007 http://www.f15sim.com - The only one of its kind. http://www.diy-cockpits.org/coll - Go Collimated or Go Home. Some people collect things for a hobby. Geeks collect hobbies. ScarletDME - The red hot Data Management Environment A Multi-Value database for the masses, not the classes. http://www.scarletdme.org - Get it _today_!

11 years, 9 months

more shameless classic trafficking (NOT Sellam's stuff)

by gerardcjat＠free.fr

> > It's a real pity you won't ship to Canada. I'd take the 11/04, rx02s, > > and the tu-58. I've already got an 11/34a, this would make a great > > addition to my collection. > > On Jan 26, 2013, at 3:23 AM, Tom publix <ittybittybytes at gmail.com> wrote: > >> More cleaning and lowered price on some stuff that didn't sell last time >> around. >> >> As always, remind me that you are a list member and I'll add some >> freebies. >> >> Thanks to all on the list whose purchased from me. >> >> -tom >> >> tcp1022 >> >> AT&T 6300 Personal Computer 251219453567 >> DEC Pro 350 251219291641 >> DEC VAX4000/300 251219438856 >> DEC alpha PWS 500au 251219352958 >> DEC VAX 4000/VLC 251219392926 >> HP 9885 floppy drives 251219443307 >> AT&T 6300 251219453567 >> DEC TU-58 251219297427 >> SMS RXO1/RX02 floppy dr 251219332374 >> PDP 11/04 251219325467 >> ADM3A 251219433952 > HOW comes that theses items CANNOT EVEN be seen from abroad ?? >From France, to be specific. Is that normal / usual ??

11 years, 9 months

Iomega "autodetect" cable internals

by jules.richardson99＠gmail.com

Has anyone dissected one of the blue Iomega 25-way cables that are marked "AutoDetect" at the female connector end? I've got one in the junk pile and on a meter it checks out as though it's wired with a 1:1 pin mapping, but I assume the "AutoDetect" label means that it has some kind of smarts embedded into one end or the other (or both) which only work their magic under certain conditions. I'm on the hunt for a DB25 male connector and bit of multi-way cable so I can wire up a null modem cable for the QX-10 [1] - if it's all at the female end then that's good because I'd be lopping that end off anyway... [1] which has a DB25 female RS232 port, and of course the only gender-changers I have here are DE9s, no DB25's... :-) cheers Jules

11 years, 9 months

DEC documentation to give away

by p.gebhardt＠ymail.com

Hi folks, I have some duplicates (seven binders) regarding DEC's red/gray wall documentation: - MicroPower/Pascal-RT, Volume 2, Version 1 Language Guide: System User's Guide (red binder) Six gray binders (VMS 5.0): - System Management Volume 1B: Setup - Programming Volume 6A: File System - Programming Volume 3: System Routines - System Management Volume 2: ?Maintenance - Programming Volume 1: Introduction - Programming Volume 4A: System Services ? I give them away for free, you take care about shipping costs. Located in Germany. Contact me offline, if someone wants them. No need to take them as a bunch. Kind regards, Pierre ------------------------------------------------------------------------------- Pierre's collection of classic computers : http://classic-computing.dyndns.org/

11 years, 9 months

ADM-3A reminiscences - was Re: more shameless classic trafficking (NOT Sellam's stuff)

by cctech＠beyondthepale.ie

John Wilson <wilson at dbit.com> wrote: > On Sun, Jan 27, 2013 at 01:55:49PM -0500, Toby Thain wrote: > >Can you expand on why you hated them? Was that generic to glass ttys, > >or just this model? > > For me it was the lack of selective clearing -- so doing even basic > editing on an ADM3A (even just ^W to delete a word) over a 1200-baud modem > connection meant lots and lots of ASCII blanks. Annoyingly slow... > VT100s were *way* nicer, and even VT52s were a step up (at least they > had ESC K, and the arrow keys could be easily distinguished from control > chars, so ^H means one thing and left-arrow means another). > I had access to a bunch of VT100s, ADM5s and an occasional ADM3A. I also didn't like the ADM3A because of its screen clearing difficulties. However, I preferred using the ADM5s as I found them subjectively faster than the VT100s (even after making sure smooth scroll was disabled). I never did any objective testing but I put this down to the longer and more complex escape sequences used by the VT100, especially when connecting to something that did a lot of cursor positioning. As far as I recall, all would have been set to 4800 baud. Regards, Peter Coghlan.

11 years, 9 months

My BBC Model B on Youtube

by terry＠webweavers.co.nz

The best of British in my collection. The capable and classy BBC Model B Microcomputer System. http://youtu.be/r9oAAcRk2Ys

11 years, 9 months

Odd TTL chip

by wdonzelli＠gmail.com

I have here an odd 7400 TTL chip - the prefix is TG. TG74S00J. Who was this? Who made TG74xx TTL? It looks somewhat like an old Sylvania ceramic DIP from the early 1970s. I have perhaps thought Transitron, but it is not. And there is no logo, other than a plain looking T. Ideas? -- Will

11 years, 9 months

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test-drb January 2013