test-drb May 2002

test-drb@ccmp.vtda.org

246 participants
947 discussions

Documation M200/DEC CR11 card reader manual/info needed

by Antonio.Carlini＠riverstonenet.com

>I'm trying to interface a DEC CR11 (a.k.a. Documation M200) card reader to >an Apple ][. > >I need the pinouts of the card reader interface. Does anyone have this >information? Is the service manual available online (in some nook I >haven't looked into yet)? You seem to have the tech manual now. The engineering drawings are available at: http://www.spies.com/~aek/pdf/dec/pdp11/ Antonio

22 years, 2 months

Documation M200/DEC CR11 card reader manual/info needed

by jimw＠agora.rdrop.com

V.C.F. wrote... -------------------------------------- I'm trying to interface a DEC CR11 (a.k.a. Documation M200) card reader to an Apple ][. I need the pinouts of the card reader interface. Does anyone have this information? Is the service manual available online (in some nook I haven't looked into yet)? -------------------------------------- Dang! Where was that link (from a following message) a couple of years ago when I was trying to do something similar??? <G> Using an Altair for a card reader controller to connect to a PC... <snicker> One thing to watch out for that bit me REAL hard when doing this, is that the data lines on the connector are the raw, unlatched outputs from the phototransistors, and the mechanically generated 'column strobe' signal has a significant amount of slop/jiggle/window (pick your favourite) in it and needs some 'processing' in order to insure valid data. I ended up recreating a circuit that I found detailed in the DEC CR11 Interface Board docs. It used a couple of monostables to delay the 'column strobe' signal by an amount, and then stretch the signal for reliable triggering. (or was it the other way 'round? - stretch then delay?) Anyway... without the 'processing' of the strobe signal the data was completely unreliable. To the point of appearing totally random! Hopefully someone has this doc at hand (or it is covered in the reader hardware manual) for reference. Mine is still buried somewhere in the chaos! Good luck! -jim --- jimw(a)agora.rdrop.com The Computer Garage - http://www.rdrop.com/~jimw

22 years, 2 months

APPLEVISION Monitor

by acme_ent＠bellsouth.net

> From: Richard Erlacher <edick(a)idcomm.com> > With the pace at which obsolescence has been creeping up on > everybody, I'd say upgradeability is of no consequence at all any more. A lot of my customers can afford $100 for an upgrade or repair but can't afford the $300 you quote below for a basic tower, so for them upgradeability is relevant. > Systems bought three years ago don't use the same drives I haven't seen any real change in fdds or CD-ROM drive in the last three years. Besides capacity, what's different about today's hard drives? > NEW 1 GHz monitorless systems > with 15 GB HDD's (WAY too small to be of interest to anyone nowadays) and a > DVD + FDD, a modest (64MB ??) of RAM, and the usual stuff including mouse and > keyboard, sporting a 4MB on-board video expandable to 16 MB, on-board sound, > and 4 USB ports along with a V.92 modem and all the other usual bells and > whistles are advertised on the local late-night TV for under $300. At prices > like that one can't afford to upgrade. By the time the warranty runs out, > they'll be obsolete again. Obsolete? Glen 0/0

22 years, 2 months

Found Half a apf MP1000

by jrkeys＠concentric.net

While cleaning at the warehouse today I found the top half of a apf MP1000 console with the two controllers attached. Now I have to hope somewhere in this place I have the bottom? Awhile back I picked up 4 cartridges for this thing and at this rate I should have a complete working unit by August. :-)

22 years, 2 months

Mentec hobbyist licenses?

by mrbill＠mrbill.net

Anybody know recent news about the status of Mentec releasing their hobbyist license / cd-rom program? Last I heard from them was February, and they havent responded yet to mail I sent a few days ago. Here's what they responded with in February: > Dear Bill, > > The quick answer is yes we are. We are at present proposing to release a > Hobbyists License Agreement with CD-ROM containing the software for the > various PDP-11 Operating Systems. Our Website is been updated, the new > website will have a Hobbyist page given all the relevant information on > the Software, CD's,Licenses, and how to obtain them. There will be a total > of 3 CD-ROM's covering all the Operating System available. > > If you have any please do not hesitate to contact. > > Careena.Fitzpatrick(a)mentec.com > or 603 883 7711 Bill -- Bill Bradford | "Fear leads to anger. Anger leads to hate. mrbill(a)mrbill.net | Hate leads to using Windows for mission-critical Austin, TX | applications." -- What Yoda *meant* to say

22 years, 2 months

"Televideo Systems"

by dquebbeman＠acm.org

> Just pinging out there... I was wondering if anyone had a Televideo TS 806 > or TS 816 they would be willing to give to a 'good home'. I have a bit of > an attachment/longing for one, it was that computer at my Dad's office > (he's an Optometrist) that I never got to play with until it broke and > (since I was rather young at the time) I took it apart. The pieces have > since been tossed by my parents in the interest of 'cleaning up'. > > I'm just curious if there's any still out there right now - I'd be > interested in just seeing pictures even... a nonworking or working system > would be pretty cool. Wasn't the 816 the 8086/8088 version? The TS-803 had a Z-80. We had 25 of the TS-803 at RETS, and I've been haggling for the only one I know is left from the guy who has it, so far, to no avail. I have manuals and lots of software for it, including TELE-WRITE and TELE-DRAW. We had a MouseSystems optical mouse on ours that worked with TELE-DRAW. These were nice CP/M machines. I was really comfortable using them, except the keyboards were *very* springy. -dq

22 years, 2 months

ISA/486 Board Question

by ajp166＠bellatlantic.net

From: Fred deBros <fdebros(a)verizon.net> >Is there an ISA card that has the IDE irq assignable to any IRQ? Older ones did. IDE IRQs were 15 and 14. >U guessed right: I'd like to stick a secondary ide drive (CDROM >obviously) into a 486 that has only one ide (IRQ14)drive, but no plug >for a secondary drive, and no, I cannot use the ide cable as it is a >laptop, but yes, it has the bus connected to a dockstation. And yes I yes you can. I've done it. one of my 486boxen has 3 CDroms and a 500mb IDE disk. It serves as a CD server running Win95. Some of the real early 486s the bios was a bit poor but most of the better ones it's been no problem. FYI: for the CDrom you simply do nothing at the bios level and it's the OS that has to find and install the CDrom. If the cdrom is a standard the win95 drivers will do though I've had a few oddballs that I had to use the driver supplied with the drive. Allison

22 years, 2 months

Anyone need 2112 RAMs

by mhstein＠canada.com

Yeah, I saw those (at Active, right?); in fact here they were 5 for 10 cents. Bought a couple packs myself but alas, I don't know of anything that uses them, not PETs anyway; I think you're thinking of 2114s, 1Kx4. There were 4 versions of the static RAM PETs: (6316 ROMs equivalent to 2316B) 320008: 6540 ROM, 6550 RAM & VRAM 320081: 6316 ROM, 6550 RAM & VRAM 320132: 6540 ROM, 2114 RAM & VRAM 320137: 6316 ROM, 2114 RAM & VRAM The Dynamic RAM PETs used 2114/6114s for VRAM. ROMS used include 2316/6316, 2332, 2364/6364. RAMS used include 5298, 4108, 4116 Parallel disk drives used 2114s. mike ----------Original Message----------- >Date: Thu, 02 May 2002 21:19:24 -0400 >From: Arlen Michaels <arlen.michaels(a)sympatico.ca> >Subject: Anyone need 2112 RAMs? >I was surprised to find a local supplier clearing old stock of 2112 RAMs. <snip> >I believe this was the chip used in late-model Commodore PETs <snip>

22 years, 2 months

APPLEVISION Monitor

by acme_ent＠bellsouth.net

> From: Richard Erlacher <edick(a)idcomm.com> > The problem is that the popular U.S. vendors expend entirely too much of their > resources on packaging, thinking, perahaps correctly, that it will help sales, > but they forget, oir perhaps not, that the individualized packaging will make > their systems difficult to upgrade over time, thereby making the long-term > usefulness of considerably less value. Dick, I believe they do this deliberately, to inhibit upgrades and repairs. I make a lot on upgrades and repairs of systems I originally built and sold, but the big names only make money when they sell a machine, so naturally they prefer that people replace their PCs instead of fixing them or beefing them up. When people come into my shop and I can get them to understand "total cost of ownership," they buy from me every time. Glen 0/0

22 years, 2 months

id these weird ics?

by rigdonj＠cfl.rr.com

Today I picked up a wire wrap card with some strange ICs. They're 16 pin dips with white ceramic bodies and gold lids and legs. They have the numbers 7552-1C and 7350 on them. I believe the 7350 is a date code. There are other ICs on the card and they're all date coded to 1973. There's also a note on the board that says that it was modified on 7/25/74. There's also a trademark symbol on the ICs that looks like a black box with a lower case "i" showing through in gold. I don't think I've ever seen this trademark before, does anyone know what company it's for? Anyone know what the ICs might be? Joe

22 years, 2 months

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test-drb May 2002