- test-drb@ccmp.vtda.org - classiccmp.org

Computers with ports coming out the front?

by cb＠mythtech.net

>I am trying to identify various computers that have had their ports >situated in the front of the chassis as opposed to the back. > >The Atari 800 would be one example (game ports in the front). Are there >any other examples anyone can think of, especially where peripheral (disk, >printer) or perhaps network ports are concerned? Didn't the IBM PCjr have two aux sockets on the front for game cartridges and I thought there was a printer interface that could use those sockets, and a floppy drive interface as well (could be wrong). And of course Mac's up to the Mac Plus have the keyboard port in the front, as well as I have seen some old PC clones like that (but I suspect that isn't exactly what you are looking for). -chris <http://www.mythtech.net>

23 years, 4 months

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The ACE is recovering :-)

by philpem＠dsl.pipex.com

Hi all, I've finally found the glitch in my Jupiter Ace. When the power supply was momentarily reversed (and applied to the I/O port), the CPU (a NEC D780C) and one of the RAMs (NatSemi MM2114) packed up. After replacing the CPU with a spare (OK, I pinched it out of a Toshiba HX-10 MSX), I've managed to perform a bit of testing. With the CPU out, everything looked good. When I powered up and probed all the data and I/O lines, D7 was locked to 0V and D6 was sitting at around 2.5V. Obviously, something was overloading the Z80's data bus, causing it to overheat significantly. After removing the RAM (and nearly pulling up four pads), the Z80 seems to be running fine. RFSH is pulsing, as are M1 and CLK. The data and address lines look OK on my scope, too. So, it looks like the Z80 bit the dust when the PSU touched the I/O port, then it proceeded to dump 9V into D6 and D7. After that, it let out the magic smoke. Thankfully both ROMs (TMS2532s - TI's clone of the 2732) seem to be OK. The only "interesting" thing is that the current draw is around 500mA with everything except one of the RAMs and the CPU fitted. With the CPU (a Sharp LH0080A) fitted, the current consumption rises to approx. 620mA. Can someone with a working Ace please check the current consumption of their unit for me? Later. -- Phil. philpem(a)dsl.pipex.com http://www.philpem.dsl.pipex.com/

23 years, 4 months

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Mac SE/30 monitor

by drido＠optushome.com.au

>perhaps a bit uncommon question, but does anyone in (preferrably middle) >Europe have a 9" crt tube for Mac SE/30? I suppose it's the same as in >SE, the box definitely looks the same. I've broken mine by accident, and >really would like to use this box ;) The CRT from an SE would work. Mono CRTs such as these are usually interchangable (at least the ones that I have changed), but if you use one >from a different (ie, not a Mac SE or SE/30) you'll probable have to change to yoke which may be more than you want a do (though on a mono display alignment is pretty easy). My first Mac was a Plus that has been dropped, I replaced the CRT with an Amber one removed from a luggable XT. It was the same size, mounting and pinout. The yoke from the original CRT fit okay.

23 years, 4 months

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OT: Detachable Penis (was Re: 1977 Apple II for sale.)

by cb＠mythtech.net

>> > He had to talk the guy down in price but he got it and went home >> > and put it back on, relieved he didn't have to sit down to pee anymore. >> >> "... for a dollar ninety-nine!" > >You must be thinking of a different song. He talked him down from $22 to >$17. Seymore Crelbourn bought Audry 2 "for a dollar ninety-nine" -chris <http://www.mythtech.net>

23 years, 4 months

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Computer Audio Tape Formats

by dwightk.elvey＠amd.com

>From: pete(a)dunnington.u-net.com > >On Dec 17, 20:11, John Lawson wrote: >> Sheeesh!!! No excuse for posting before checking references.... >> >> Another Senior Moment > >We're all having them tonight, it seems :-) > While I can get a senior discount at restaurants, that doesn't mean I'm having a senior moment. Does it? Dwight

23 years, 4 months

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Computers with ports coming out the front?

by cb＠mythtech.net

> I submit for your consideration, the "Gyro Mouse"... having gyros on >the two axes - the object being you hold it in mid-air and wave it around >to move the cursor, etc. (It was wired, BTW) > > I saw one years ago, had to have it, and soon found out it's obvious >design flaw... you try keeping your arm and hand and mouse off the desk >for hours at a time.... I don't think the Gyro Mouse was ever meant as a normal mouse replacement. I think it was meant for doing presentations, where you would most likely not have a surface to run the mouse over as you would be standing in the front of some group, and could do nothing more than wave your hand. In that context, the design was fantastic... but yeah, I think it would have been a PITA to use in place of a normal mouse. >PS: People who use mice have clean desks, and Y'll know what *that* is a >sign of. Gimme a nice trackball, any day.... I use a mouse (two of them, one for my Mac, one for my PC), also have two keyboards... but I hardly have a clean desk... I have just barely enough room to move the mice on a pad (at current, I have my soda cup sitting on the corner of the pad as it was the only clear spot on my desk). I just turn the mouse tracking speed WAY up, so that I can cover the screen with just a slight flick of the wrist. -chris <http://www.mythtech.net>

23 years, 4 months

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Computers with ports coming out the front?

by Robert_Feldman＠jdedwards.com

I've always thought that the proper place for ports on a _desk-top_ system is on the side: easy to get to the ports and you don't have the cable connectors sticking out the back, where they add to the depth, which can be a problem on a narrow countertop. When I built my first IBM-PC clone (in a nice cherry-stained wooden case), I turned the motherboard 90 degrees CW so the ports were on the right. I also made brackets from cookie-sheet aluminum to mount the disk drives and power supply over the (now) front of the motherboard, resulting in a nice, shallow case. Bob -----Original Message----- From: Sellam Ismail [mailto:foo@siconic.com] Sent: Tuesday, December 17, 2002 5:45 AM To: cctalk(a)classiccmp.org Subject: Re: Computers with ports coming out the front? On Tue, 17 Dec 2002, Fred Cisin (XenoSoft) wrote: > On a machine that doesn't sustain much floppy activity, > (or uses external drives), if you face the disk drives towards the back, > then the ports on your PC are out front where God intended. Indeed, a friend of mine who owns a business that makes rackmount systems made a special model for a customer where they pretty much did this. They put the mounting flange on the back of the box, making it the front, and added cut-outs for the disk drives. Sellam Ismail Vintage Computer Festival ---------------------------------------------------------------------------- -- International Man of Intrigue and Danger http://www.vintage.org * Old computing resources for business and academia at www.VintageTech.com *

23 years, 4 months

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Computers with ports coming out the front?

by Robert_Feldman＠jdedwards.com

There was an article on scratch-building models in a recent Model Railroad Craftsman magazine that said that, no matter how big your work bench, sooner or later, you'll end up with about two square feet of usable, clear workspace. BTW, I use an arcade model track ball that was a prototype for a museum exhibit installation 10 years ago (and thus on topic). I've only needed to oil the bearings once, about 6 months ago. Never had to clean it. Try that with a mouse! Bob -----Original Message----- From: chris [mailto:cb@mythtech.net] Sent: Wednesday, December 18, 2002 1:39 PM To: Classic Computer Subject: RE: Computers with ports coming out the front? <snip> >PS: People who use mice have clean desks, and Y'll know what *that* is a >sign of. Gimme a nice trackball, any day.... I use a mouse (two of them, one for my Mac, one for my PC), also have two keyboards... but I hardly have a clean desk... I have just barely enough room to move the mice on a pad (at current, I have my soda cup sitting on the corner of the pad as it was the only clear spot on my desk). I just turn the mouse tracking speed WAY up, so that I can cover the screen with just a slight flick of the wrist. -chris <http://www.mythtech.net

23 years, 4 months

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working 11/70s available for $$$, one w/PEP-70 & hypercache

by uban＠ubanproductions.com

Hello, I just scored a PEP-70/Hypercache pair from a guy on eBay and in my conversations with him, I've learned that he has a couple of working 11/70s, one with conventional MOS memory and the other with a PEP-70/Hypercache pair. He is a dealer and I have no association with him other than my eBay purchase. He seems like a nice enough fellow and these things are not getting any easier to find. So, for those who are inclined to spend money on their hobby computers instead of on PCs, here is the info. DaveM(a)systechaz.com 602-437-0100 Happy Holidays! --tom

23 years, 4 months

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AMD2901CDC chip available

by ken＠seefried.com

From: Ethan Dicks <erd_6502(a)yahoo.com> > > In particular, I recognize > the 2910 as appearing on the Tandon SASI<->ST506 board in the Commodore > D9060 and D9090 drives. ISTR it's much like the 2901 but wider than 4 > bits - kind of an integrated building block for those designers who are > more concerned with real estate than extracting every last feature the > 2901 has to offer, i.e., a compact short-cut. Nope, 2910 is a microprogram address sequencer for the 2901 series. There are, however, a number of "2901 with more bits" chips, however. The IDT IDT49402/IDT49410A is the equivalent of 4 2901 slices (16-bits) + the apropos microprogram sequencer logic. Cypress had the CY7C9101, which was similar. WSI had the WS59032, which consisted of 8 2901 equivalents. Innovasic has the IA59032, which is an ASIC reimplimentation of the WSI chip and is still availible. Ken

23 years, 4 months

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Old TI analog sound chip; info? [THANKS]

by root＠parse.com

Thanks to all who replied, it was the 76477 chip I was thinking of, and thanks for the links to the PDF files! Appreciate it! Cheers, -RK -- Looking for Digital Equipment Corp. PDP-1 through PDP-15 minicomputers! Robert Krten, PARSE Software Devices +1 613 599 8316. Realtime Systems Architecture, Consulting and Training at www.parse.com

23 years, 4 months

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OT: NCR 6299 Raid subsystems

by pat＠purdueriots.com

I've got a bunch of NCR (Symbios) Class 6299 Model 1100 raid subsystems, and they have a DA-15 console port, for which I can't find any pinout information. Does anyone have a pinout available or information on these? I've tried googling everything I could think of, but no luck. I know the information is in their 'Site Preparation Guide', which Purdue had, but got lost. Also, NCR doesn't seem to carry documentation for these on their website. Thanks for any information. Pat -- Purdue Universtiy ITAP/RCS Information Technology at Purdue Research Computing and Storage http://www-rcd.cc.purdue.edu

23 years, 4 months

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connecting 33 to PDP-8

by pete＠dunnington.u-net.com

On Dec 17, 21:40, Charles wrote: > I have a PDP-8/I and a Model 33 but there are no connectors at > all. The serial interface card (? M709) is there and if I run > clipleads to the appropriate pins on its backplane socket with a > series resistor to +12v it works, both keyboard and printer. > > What pieces am I missing? The above discussion is beyond my > current understanding of DEC interconnect hardware. Should there > be a card that plugs into the backplane somewhere, that has a > pigtail hanging from it, or what? If so, what part number should I > be searching for? There possibly should, but I don't know much about the details of an 8/I. Are there wires running from those pins to another slot? An 8/E is Omnibus, and the serial signals don't appear anywhere on the backplane, so the only access is via the Berg connector on the (quad height) interface card. -- Pete Peter Turnbull Network Manager University of York

23 years, 4 months

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Computer Audio Tape Formats

by pete＠dunnington.u-net.com

On Dec 17, 15:58, Sellam Ismail wrote: > On Wed, 18 Dec 2002 pete(a)dunnington.u-net.com wrote: > > > I think the Commodore PET uses modified CUTS. It records each block > > twice, which is why it's relatively slow, but also pretty robust. > > If it records each block twice, and one block is bad, which of the two do > you trust? > > (Or is there a checksum involved too?) The one with the good checksum, I expect. There is a check of some sort, but I don't know the details. -- Pete Peter Turnbull Network Manager University of York

23 years, 4 months

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Valuable MicroVAX-II (?)

by healyzh＠aracnet.com

> >>I'd expect that for one with a SCSI Qbus module, but this system seems > >>rather vanilla, except for the multiple RD54s. > >> > >>Who'd a thunk it? As has been pointed out, someone is most likely after the 3 RD54's. The thing to remember is that there are still systems being used commercially, or by the Government that use these drives. The cost of qualifying different hardware to move to SCSI far outweighs the cost of obtaining RD54's. > >Anyone have any ideas as to why most BA123s are missing the door that > >covers the operator's panel? Is it just easily broken and lost? > > > > > I think they were shipped broken. You had to be very careful using > that door, or the pegs (hinges) would break off. Since all the intresting > buttons were under the door, it needed to be opened fairly frequently. I had one that was intact. The top peg that holds it in place and makes up the hinge is now broken. I'm still ticked off at my Mother over that one. I had the panel off, and she knocked it over on a hardwood floor. The result, the peg broke off. :^( That was a few years ago, I've still got the peg, and one of these years I'll try and patch it. Zane

23 years, 4 months

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OT: Detachable Penis (was Re: 1977 Apple II for sale.)

by cb＠mythtech.net

>> Seymore Crelbourn bought Audry 2 "for a dollar ninety-nine" > >Thank Dog google knows what to do with misspelled search terms. It's >"Seymour Krelborn bought Audrey 2" Yeah, I figured when I was writing it that I was spelling his name wrong... what I didn't expect was that he got Audry 2 for 4 cents cheaper than I said... he bought it from the old Chinese man for a dollar ninety-five (that fact dawned on me later as I had the song stuck in my head). -chris <http://www.mythtech.net>

23 years, 4 months

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connecting 33 to PDP-8

by Qstieee＠aol.com

This document talks about the jumper options on the KL8E: <A HREF="http://www.cs.uiowa.edu/~jones/pdp8/hard8e/kl8e.html">http://www.cs.uiowa.edu/~jones/pdp8/hard8e/kl8e.html</A> There is also good information and a knowledgeable contact at: <A HREF="http://www.pdp8.net">http://www.pdp8.net</A>

23 years, 4 months

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connecting 33 to PDP-8

by charlesmorris＠direcway.com

On Tue, 17 Dec 2002 16:11:32 -0600, you wrote: >> The -8/E has an M8650 (KL8E) which I've been using with RS232. However, >> I have 40-way Berg connectors, and the proper AMP flat 8-way Mate-N-Lok >> connector shells for the 20mA loop, and the male and female pins... > >Sounds like you have the basics covered. Don't forget the short jumper >wire at the Berg end that directs the TTL output of the KL8E shift >register to the 20mA output circuit. It's a different loop than the >one you should have right now on your EIA cable. I have a PDP-8/I and a Model 33 but there are no connectors at all. The serial interface card (? M709) is there and if I run clipleads to the appropriate pins on its backplane socket with a series resistor to +12v it works, both keyboard and printer. What pieces am I missing? The above discussion is beyond my current understanding of DEC interconnect hardware. Should there be a card that plugs into the backplane somewhere, that has a pigtail hanging from it, or what? If so, what part number should I be searching for? thanks Charles

23 years, 4 months

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Detachable Penis (was Re: 1977 Apple II for sale.)

by Fred.van.Kempen＠microwalt.nl

And yes, we do have the MP3 of that available.. :) --f > -----Original Message----- > From: Sellam Ismail [mailto:foo@siconic.com] > Sent: Tuesday, December 17, 2002 11:40 AM > To: cctalk(a)classiccmp.org > Subject: OT: Detachable Penis (was Re: 1977 Apple II for sale.) > > > On Tue, 17 Dec 2002, Cameron Kaiser wrote: > > > > He had to talk the guy down in price but he got it and went home > > > and put it back on, relieved he didn't have to sit down > to pee anymore. > > > > "... for a dollar ninety-nine!" > > You must be thinking of a different song. He talked him down > from $22 to > $17. > > Lyrics here: > > http://www.lyricsfreak.com/k/king-missile/16758.htm > > :) > > Sellam Ismail Vintage > Computer Festival > -------------------------------------------------------------- > ---------------- > International Man of Intrigue and Danger > http://www.vintage.org > > * Old computing resources for business and academia at www.VintageTech.com *

23 years, 4 months

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Fw: New home for DEC 3000 model 300LX [Norway]

by rschaefe＠gcfn.org

A little far for me to drive... Bob ----- Original Message ----- From: "Arne Bergseth" <Arne.Bergseth(a)dnv.com> Newsgroups: comp.os.vms Sent: Tuesday, December 17, 2002 3:13 PM Subject: New home for DEC 3000 model 300LX > DEC 3000 model 300 available for VMS hobbyist. > Workstation with Alpha 21064 processor, 64 MB memory and 1.05 GB disk, > has been taken out of use and need a new home. > I already have more than I can accomodate. > The machine is located in Norway, the system box can possibly be shipped > by mail if you are willing to cover the postage. > If you also want the VRC21-HA monitor you will have to come get it in > Sandvika in Norway. > > Regards, > Arne Bergseth >

23 years, 4 months

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Computer Audio Tape Formats

by dwightk.elvey＠amd.com

>From: pete(a)dunnington.u-net.com > >On Dec 18, 0:37, pete@mindy wrote: > >> "101100" at 1200, you'll see it's actually a Manchester code: >> >> __ _____ __ __ _____ >> | |__| |__| |__| |_____| | >> >> --1-- --0-- --1-- --1-- --0-- --0-- > >Oops, I take that back :-) Although the Sorcerer manuals describe it as a >Manchester encoder/decoder, what it puts on the tape is FSK. I just >checked the schematic and circuit description. > >Dwight hasn't exactly described Manchester encoding either, though. > Manchester encoding puts the clock transition in the *centre* of each >cell, and the polarity of the transition determines whether it's a 0 or a >1. There's a phase shift at the cell boundary if necessary. His diagram >*could* be Manchester encoding if you shift the 0s and 1s slightly to the >left, except for the last bit. It should be (maybe 'd' for "down" and 'u' >for "up" makes it more obvious): > > ___ _ ___ _ ___ > |___| |_| |_| |___| > > -0- -1- -1- -0- -0- -1- > d u u d d u > >It's too late at night here, for any more of this :-) Hi Pete Yes, you are correct. The difference in the Poly format was between RZ vers NRZ. I think Manchester only refers to the clocking, as you described. Dwight > >-- >Pete Peter Turnbull > Network Manager > University of York >

23 years, 4 months

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Need a home for some HP gear - UK.

by tim.myers＠protasis.co.uk

I need to find a home for 2 HP Laboratory Automation Systems. They realy need to be moved before the end of the year (or I need a firm commitment to remove them very early in the new year), or they're going to have to go in the skip, much as this pains me. The systems are HP3350 Laboratory Automation Systems, each consists of: HP-1000 F Series Computer, HP 12990B Memory Extender HP 12979B 1/O Extender HP 7970E Tape Drive 2xHP 7925 Disk Drives Each system is housed in 2 19" racks. I also have 1xHP2608A printer, 3xHP2393A terminals, and an HP-1000 A700 machine (also in a 19" rack), lots of documentation, and tapes. You'll have to collect them, or pay my costs for hiring a van and a mate to deliver (within a reasonable distance) them to you (which I'm happy to do over the Christmas Period), and they'll need to go on the ground floor, unless you have a lift. I'm not making any charge for these systems. Collection from Ellesmere Port, Wirral. If you need pictures etc., I can mail then to you. You can call me on 07980 859 383 to discuss if required. I've not much time at the moment, so I can't monitor the list, so please email me at tim.myers(a)protasisREMOVEME.co.uk if you're interested. I'd hate for these to go in the skip, but I have to clear the place theyr'e in, and have no storage of my own. I'm also Ebaying my PDP-11/73s complete with VT-320s. Tim.

23 years, 4 months

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Computer Audio Tape Formats

by pete＠dunnington.u-net.com

On Dec 17, 20:11, John Lawson wrote: > Sheeesh!!! No excuse for posting before checking references.... > > Another Senior Moment We're all having them tonight, it seems :-) -- Pete Peter Turnbull Network Manager University of York

23 years, 4 months

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Computer Audio Tape Formats

by pete＠dunnington.u-net.com

On Dec 18, 0:37, pete@mindy wrote: > "101100" at 1200, you'll see it's actually a Manchester code: > > __ _____ __ __ _____ > | |__| |__| |__| |_____| | > > --1-- --0-- --1-- --1-- --0-- --0-- Oops, I take that back :-) Although the Sorcerer manuals describe it as a Manchester encoder/decoder, what it puts on the tape is FSK. I just checked the schematic and circuit description. Dwight hasn't exactly described Manchester encoding either, though. Manchester encoding puts the clock transition in the *centre* of each cell, and the polarity of the transition determines whether it's a 0 or a 1. There's a phase shift at the cell boundary if necessary. His diagram *could* be Manchester encoding if you shift the 0s and 1s slightly to the left, except for the last bit. It should be (maybe 'd' for "down" and 'u' for "up" makes it more obvious): ___ _ ___ _ ___ |___| |_| |_| |___| -0- -1- -1- -0- -0- -1- d u u d d u It's too late at night here, for any more of this :-) -- Pete Peter Turnbull Network Manager University of York

23 years, 4 months

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Computers with ports coming out the front?

by vassilip＠dsl.cis.upenn.edu

I am amazed that Tony didn't mention this, but the BBC micro had a number of expansion connectors under the keyboard facing towards the front of the machine. To access these ports, you had to lift the whole machine and plug IDC terminated ribbon cables. As I recall, you had the 1MHz expansion bus, the printer port, the Tube (2nd processor bus) and a disk interface connector. You also had a power output connector allowing you to power external devices (e.g. external floppies). The HP Integral PC also had two connectors on the front. These were HIL connectors for low-speed input devices (keyboard, mouse, digitizing tablet, etc). **vp

23 years, 4 months

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Computer Audio Tape Formats

by dwightk.elvey＠amd.com

>From: "Dwight K. Elvey" <dwightk.elvey(a)amd.com> > >>From: tlindner(a)ix.netcom.com >> >>> Here's one: >>> >>> http://www.kim-1.com/usrman.htm#E >> >>Ahh, this is really diffferent! >> >>This uses: >> >>'0 bit' - 18 square cycles at 3700 Hz. >> 6 square cycles at 2400 Hz. >> >>'1 bit" - 9 square cycles at 3700 Hz. >> 12 square cycles at 2400 Hz. >> >>Both are the same length (7.452 microseconds). >> >>As you can probably tell, I am currently anaylizing this at a very low >>level. >> >>-- >>tim lindner tlindner(a)ix.netcom.com >> > >Hi > Here is one that is even a little different still. >It is what is called Manchester encoding, using biphase >clocking. You don't indicate 1 or 0, you indicate a change >by a quick clock and no change by a long clock. > It looks something like this: > > ___ _ ___ _ > |___| |_| |_| |______ Opps! Shuld have been: ___ _ ___ _ ___ |___| |_| |_| |___| > > Depending on past history, this might be: > > 0 0 1 1 0 0 0 > > or > > 1 1 0 0 1 1 1 > > > This is the type of encoding used on my Poly88 for >what they call PolyPhase. This runs at 2400 baud. > There is a standard called Byte format that uses 300 baud >and the two tones 1200 and 2400. > Besides the type of encoding, you also need to know >what the record formats looks like. Do you have one long >record for the entire file? What does the header look like? >Is it synchronous or asynchronous? Is there parity, check sum, >CRC or ECC? > There are a lot of things that need to be built up into >a complete tape decoder. A tape writer would be used >by more than a tape reader. One should only need to read >the tape once but many people would often like to create >a tape from that same data. You really want both. > One should also note that most audio tape to digital >inputs on these old computers filtered the signal some >to optimize the audio signal for decode. This was done >on both read and write of the signal. >Dwight > > >

23 years, 4 months

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Computer Audio Tape Formats

by dwightk.elvey＠amd.com

>From: tlindner(a)ix.netcom.com > >> Here's one: >> >> http://www.kim-1.com/usrman.htm#E > >Ahh, this is really diffferent! > >This uses: > >'0 bit' - 18 square cycles at 3700 Hz. > 6 square cycles at 2400 Hz. > >'1 bit" - 9 square cycles at 3700 Hz. > 12 square cycles at 2400 Hz. > >Both are the same length (7.452 microseconds). > >As you can probably tell, I am currently anaylizing this at a very low >level. > >-- >tim lindner tlindner(a)ix.netcom.com > Hi Here is one that is even a little different still. It is what is called Manchester encoding, using biphase clocking. You don't indicate 1 or 0, you indicate a change by a quick clock and no change by a long clock. It looks something like this: ___ _ ___ _ |___| |_| |_| |______ Depending on past history, this might be: 0 0 1 1 0 0 0 or 1 1 0 0 1 1 1 This is the type of encoding used on my Poly88 for what they call PolyPhase. This runs at 2400 baud. There is a standard called Byte format that uses 300 baud and the two tones 1200 and 2400. Besides the type of encoding, you also need to know what the record formats looks like. Do you have one long record for the entire file? What does the header look like? Is it synchronous or asynchronous? Is there parity, check sum, CRC or ECC? There are a lot of things that need to be built up into a complete tape decoder. A tape writer would be used by more than a tape reader. One should only need to read the tape once but many people would often like to create a tape from that same data. You really want both. One should also note that most audio tape to digital inputs on these old computers filtered the signal some to optimize the audio signal for decode. This was done on both read and write of the signal. Dwight

23 years, 4 months

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Computers with ports coming out the front?

by pete＠dunnington.u-net.com

On Dec 17, 5:22, vassilip(a)dsl.cis.upenn.edu wrote: > I am amazed that Tony didn't mention this, but the BBC micro had a number > of expansion connectors under the keyboard facing towards the front of > the machine. To access these ports, you had to lift the whole machine > and plug IDC terminated ribbon cables. As I recall, you had the 1MHz > expansion bus, the printer port, the Tube (2nd processor bus) and a > disk interface connector. You also had a power output connector allowing > you to power external devices (e.g. external floppies). >From left to right, 34-pin floppy interface, 26-pin parallel printer, 20-pin user port, 34-pin 1MHz bus, 40-pin Tube (second processor interface). -- Pete Peter Turnbull Network Manager University of York

23 years, 4 months

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Computer Audio Tape Formats

by pete＠dunnington.u-net.com

On Dec 17, 13:50, tim lindner wrote: > I am looking for information regarding how various computers wrote > information to audio tapes. > I am contemplating creating an audio tape anaylzer to help me recover > some data. I would like to make the program useful to thoes outside the > Color Computer community. But first I need to understand all of the > different methods used to put data on audio tape. Look up "Kansas City" and "CUTS" on the web... many machines used some derivative. For 300 baud: logic 0 is 4 cycles of a 1.2kHz tone logic 1 is 8 cycles of a 2.4kHz tone lead-in is 2.4kHz, followed by a zero byte Similarly for 1200 baud but fewer cycles. CUTS (Computer Users Tape Interface) was derived from KC format, which was so called because it came out of a meeting held in Kansas City in 1975. It's backwards compatible. Also look up Don Tarbell's system. I can't remember what the tones were, but it's about 600 baud, IIRC. None of this tells you about the format of the data, of course -- block headers (if any), checksums/CRCs, etc. That tended to vary. -- Pete Peter Turnbull Network Manager University of York

23 years, 4 months

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Computer Audio Tape Formats

by glenslick＠hotmail.com

Here's one: http://www.kim-1.com/usrman.htm#E >From: tlindner(a)ix.netcom.com (tim lindner) >Reply-To: cctalk(a)classiccmp.org >To: classiccmp(a)classiccmp.org (Classic Computers) >Subject: Computer Audio Tape Formats >Date: Tue, 17 Dec 2002 13:50:31 -0800 > >I am looking for information regarding how various computers wrote >information to audio tapes. _________________________________________________________________ Tired of spam? Get advanced junk mail protection with MSN 8. http://join.msn.com/?page=features/junkmail

23 years, 4 months

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Computer Audio Tape Formats

by tlindner＠ix.netcom.com

I am looking for information regarding how various computers wrote information to audio tapes. For example, the Tandy Color Computer wrote ones and zeros to audio tape in the following format: 'one bit': one sinusoidal cycle @ 2400 Hertz. 'zero bit': one sinusoidal cycle @ 1200 Hertz. The bit rate is variable on a CoCo tape. But averages to about 1500 bits per second. I am contemplating creating an audio tape anaylzer to help me recover some data. I would like to make the program useful to thoes outside the Color Computer community. But first I need to understand all of the different methods used to put data on audio tape. -- tim lindner tlindner(a)ix.netcom.com

23 years, 4 months

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Amiga and X-windows

by ghldbrd＠ccp.com

Thanks to a post here by Curt Nelson, I am the proud owner now of some interesting Amiga goodies . . . . I have a question to all those Amigaphiles out there: I have a copy of X Window System by GfxBase. It looks like a graphic terminal emulation for *nix systems, which looks like a neat toy for playing with my Linux box. Have any of you ever played with this, or even seen it in action? I do have a 10 Base 2 Ethernet card for the PC here, but other than that, my networking experience is zero. Looks like I'm going to be learning some new stuff over the next few months. Gary Hildebrand St. Joseph, MO

23 years, 4 months

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IBM 5150 for sale

by vcf＠siconic.com

I am passing this message along to anyone (presumably in the UK) who is interested in an IBM 5150. Please reply to the original sender. Reply-to: <slipperysli(a)hotmail.com> or <mail(a)slibob.com> ---------- Forwarded message ---------- Date: Tue, 10 Dec 2002 12:29:10 +0000 From: Simon Taylor <slipperysli(a)hotmail.com> Reply-To: mail(a)slibob.com Subject: IBM 5150 Hi I have a 1981 IBM 5150, complete with monitor and tracotr-feed dot-matrix printer which I am hoping to sell. Are you interested? If you aren't please could you put me in touch with anyone who might be interested? Please let me know if you can or can't help me. Thanks very much Simon Taylor http://www.slibob.co.uk/ Tel: 07021 118445 Txt: 07951 704272 -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org * Old computing resources for business and academia at www.VintageTech.com *

23 years, 4 months

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Sinclair QL

by pegran＠online.no

Hello. After having stumbled accross the page http://www.classiccmp.org/pipermail/cctech/2002-October/003501.html, I wonder if you have any Sinclair QLs left, what state they are in, and how much they cost. Regards, Per Granaune

23 years, 4 months

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Apple Mac SE/30 monitor available?

by freddy＠kotelna.sk

Hello again, perhaps a bit uncommon question, but does anyone in (preferrably middle) Europe have a 9" crt tube for Mac SE/30? I suppose it's the same as in SE, the box definitely looks the same. I've broken mine by accident, and really would like to use this box ;) Thanks in advance, -- freddy ...for more info 'finger freddy(a)kotol.kotelna.sk'

23 years, 4 months

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Another Decmate III available

by trestivo＠concentric.net

To all, the first Decmate III sold on Ebay, another one is now posted. If your interested take a look at http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=179&item=2082422826 thanks, and happy holidays to all!

23 years, 4 months

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Need a home for some HP gear - UK.

by tim.myers＠protasis.co.uk

Here are some pictures for those of you who maybe interested : http://www.computer-museum.org.uk/images/P0001355.jpg http://www.computer-museum.org.uk/images/P0001356.jpg http://www.computer-museum.org.uk/images/P0001357.jpg http://www.computer-museum.org.uk/images/P0001358.jpg http://www.computer-museum.org.uk/images/P0001364.jpg http://www.computer-museum.org.uk/images/P0001360.jpg Tim.

23 years, 4 months

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Ebay [was: Re: The ACE is recovering :-)]

by pete＠dunnington.u-net.com

On Dec 17, 17:09, Philip Pemberton wrote: > My problem is that the shipping price he's given me is for Germany... > I think I'm going to stuff EUR8 in an envelope and send it (like you said), > it's the easiest way to get this sorted out... Postage Austria <--> UK isn't much different from Austria <--> (anywhere else in EC), so I'd just send him EUR8 and see what happens. -- Pete Peter Turnbull Network Manager University of York

23 years, 4 months

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Looking for certain software packaging ($$$)

by vcf＠siconic.com

I am searching out any retail software packaging that conforms to the following description: The front cover of the packaging has a flap that opens up (like a book) to reveal a manual or pamphlet inside. The flap must be part of the box itself, and not part of a sleeve that slips over the box. I have Delrina WinFax Pro 3.0 which almost fits this description but the flap is part of a sleeve that fits over the main box. Any software in question must have been published or put on the market prior to March of 1996. One possible example may be Delrina WinFax Pro 4.0 (which is what I was originally searching for a couple months back). If you have any software packaging that fits this description, please contact me directly at <sellam(a)vintage.org>. There is a bounty for this! -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org * Old computing resources for business and academia at www.VintageTech.com *

23 years, 4 months

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Ebay [was: Re: The ACE is recovering :-)]

by Antonio.Carlini＠riverstonenet.com

>rating, 99% positive. The problem? He's given me a shipping price of EUR2.55 >per batch of three chips, plus EUR1 for three ROMs. I've ordered six ROMs, >so that comes to EUR3.55 x 2 = 7.10. But he seems to be ignoring my mails >requesting a postage price for me. Bear in mind I'm in England (ho hum). The What's the problem? If you are happy about the total price (7.10euro) for the ROMs just pop 8 euro into an envelope with a letter wrapped round them indicating where you want them posted to. Include an email address and I expect he'll get back to you if there is a problem. This has always worked for me ... both with Europe and the US. Antonio

23 years, 4 months

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Little score, & possible VAX 630 rescue...

by dwoyciesjes＠comcast.net

On the way home today, I decided to stop at the local Goodwill, in my (never-ending?) search for Mac ADB keyboard cables. Well, I picked up a working Mac SE/30 w/ keyboard for $5.00, and a 18" x 30" Guiness chalkboard for $12.00. No keyboard cable with the Mac, though... Sigh... The search continues... A local used computer shop did net me a Mac keyboard and cable, for $10. Now, on to the Vax. I have a lead on a forgotten DEC Industrial Vax 630. I don't know what in it or anything yet. It's just the (about) 30" x 19" x 10" rackmount unit. Apparently, about 10 -12 years ago, DEC had a contract with a Southern CT company, that makes industrial keyboards and mice. DEC shipped them the Vax, to test the devices, all of them. They never asked for the machine back. The moniter that went with it has since died. That may still be around, but I don't know. As far as they know, the Vax still works. Well, at least last time the powered it up. I'm waiting to see what the company wants to do with it, but if I tell them someone wants to buy it, that may help. It's a heavy little beast, so shipping may be a bit much. They'll probably prefer that you pick it up, but I'm sure something can be worked out if necessary. Contact me off-list. -- ---Dave Woyciesjes ---ICQ# 905818

23 years, 4 months

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RS232 or Parallel port based keyboards and joysticks

by Robert_Feldman＠jdedwards.com

The Palmtop Paper's Online Store has KeyMate adaptors and software that allow any PS/2-plug PC keyboard to be used with the HP 200LX's serial port or IR port (under MS-DOS 5.0). $69.95 +s/h. http://www.palmtoppaper.com/store/asp/product.asp?product=98 "Ram & Suganthi M." wrote: > > Hi, > > Does anyone know where I can get a keyboard that either plugs into an RS232 > / RS422 or Parallel Port? Ditto for a joystick. I want to connect a > keyboard to a transputer array for stand-alone operation and I already have > RS232 / Parallel ports on the array. > > Thanks, > > Ram

23 years, 4 months

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RS232 or Parallel port based keyboards and joysticks

by ram_suganthi＠hotmail.com

Hi, Does anyone know where I can get a keyboard that either plugs into an RS232 / RS422 or Parallel Port? Ditto for a joystick. I want to connect a keyboard to a transputer array for stand-alone operation and I already have RS232 / Parallel ports on the array. Thanks, Ram _________________________________________________________________ The new MSN 8: advanced junk mail protection and 2 months FREE* http://join.msn.com/?page=features/junkmail

23 years, 4 months

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Looking for certain software packaging ($$$)

by Robert_Feldman＠jdedwards.com

ISTR that the Traveling Software word processor (software on cassette tape) I bought for a TRS Model 100 was packaged like that. I no longer have it, but the date was early 90's. Bob -----Original Message----- From: Dan Veeneman [mailto:dan@ekoan.com] Sent: Tuesday, December 17, 2002 6:52 AM To: cctalk(a)classiccmp.org Subject: Re: Looking for certain software packaging ($$$) At 06:26 AM 12/17/02 -0800, you wrote: >Would any Commodore cassette software do? >I think I have a c64 or vic 20 game that was packaged like that Almost all of the Intellivision game cartridges were packaged like that as well. I don't know if that counts as "software" for Sellam's purposes or not. Cheers, Dan

23 years, 4 months

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Computers with ports coming out the front?

by Robert_Feldman＠jdedwards.com

Yes, pin 7 of the modem port is for +12V. The pinout of the DE-9P (except for some early boards with a female DE-9) is: 1 Gnd 2 TXD 3 (not used) 4 MSB (Modem Status Bit) 5 CTS 6 RXD 7 +12V 8 MCB (Modem Control Bit) 9 RI The Tech manual goes on to say all signals are TTL, and the interface is "extremely vulnerable to damage through misuse." Also, some modems with RS-232C connectors need an external adapter box so that the OI isn't damaged. modem port Bob -----Original Message----- From: Gary Hildebrand [mailto:ghldbrd@ccp.com] Sent: Monday, December 16, 2002 11:33 PM To: cctalk(a)classiccmp.org Subject: Re: Computers with ports coming out the front? Lawrence Walker wrote: > > Yup, the whole shebang. External Battery, keyboard, printer, video, > serial RS232 and Modem. BTW what was the difference between the > modem and RS232 ports ? > > Lawrence Besides number of pins . . . . I think the 9 pin Modem port was for the accessory modem and has DC feeding the box that fits in the disk bay. The RS232 could be configured to drive a serial printer which was the common interface back then, especially on daisywheels. Gary Hildebrand St. Joseph, MO

23 years, 4 months

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Computers with ports coming out the front?

by foxnhare＠bigvalley.net

Heh.. While looking at a Transactor Magazine tonite (fomr something else), I had noticed this bit in the new Products Section (from January 1986) Commodore 64 Remote Keyboard Conversion Kit What it is - an extension ribbon cable for the 64 keyboard top with shells for the PCboard bottom and Keyboard top. From the news item: Remote Keyboard Conversion Kit If you have a Remote Keyboard Conversion Kit - Here's that you have: [picture of keyboard in front of bottom of 64 with ports facing the keyboard] - a keyboard for your lap, lean back-relax. - Keyboard to pass around when playing games - Keyboard not restricted in movement by 5 cables - A computer with cable plugs facing you (in the 64's design that would be Parallel user port, TV, Video, Disk Drive/Printer, Cassette and Cartridge.) - A Computer you can change cabling and accessories easily. - Color keyed to match the original unit (the brownish breadbox style) Friendly Systems, Inc. 1845 Range St. Suite A Boulder, CO 80301 (from page 77 of the Jan '86 Transactor Vol.6,Iss.4) And didn't some rack mounted 8-bits (Apple, Atari, and 64) have the ports out the front? I read about such units at major software places like EA, they were custom mountings though. ... Thinking on that you might find rack mounted PCs with forward ports too in late 80's industrial component catalogs... Larry -- 01000011 01001111 01001101 01001101 01001111 01000100 01001111 01010010 01000101 Larry Anderson - Sysop of Silicon Realms BBS (209) 754-1363 300-14.4k bps Set your 8-bit C= rigs to sail for http://www.portcommodore.com/ 01000011 01001111 01001101 01010000 01010101 01010100 01000101 01010010 01010011

23 years, 4 months

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1977 Apple II for sale. (ABECLASSIC)

by dfnr2＠yahoo.com

"Chandra Bajpai" <cbajpai(a)attbi.com> wrote: > Btw - Does anyone know who the guy at ebay user id 'abeclassic' is? I > wish I had his deep pockets...he bids on a lot of things and definitely > outspends everyone. Some times I wonder if it's worth bidding on if he > his even thinking about the same item. DEFINITELY continue to bid your price on items you want. If you lose, so be it, but make him pay at least that much, or he won't even have to use any discretion when selecting auctions. Dave __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. http://mailplus.yahoo.com

23 years, 4 months

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Old TI analog sound chip; info?

by dan＠ekoan.com

At 08:07 PM 12/16/02 -0600, you wrote: >I'm fairly sure Radio Shack at one time sold some of those >particular sound generator chips too. Yes, I have a SN94281 in a Radio Shack package. >I have the data sheet for the SN94281, but I'm not sure about the other >two. If it would be helpful, I can scan it. I've started to scan some of my old data sheets. The panels for the SN94281 can be found at http://www.decodesystems.com/old-ics.html Cheers, Dan http://www.decodesystems.com/wanted.html

23 years, 4 months

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Need information on TRSDOS 1.3 internals

by tim＠tim-mann.org

Sellam Ismail wrote: > Are the TRSDOS 1.3 internals documented in any of the TRS-80 reference > manuals? As far as I know, Tandy never documented the on-disk data structures for Model III TRSDOS. We were stuck figuring them out for ourselves even in the old days. They did document the assembly language interface to the OS. There's a scan of the part of the Model III manual that deals with TRSDOS 1.3 user commands and assembly-language entry points on Wade Fincher's site: http://www2.asub.arknet.edu/wade/m3trsdos.pdf -- Tim Mann tim(a)tim-mann.org http://www.tim-mann.org/

23 years, 4 months

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BIG problem with my Jupiter Ace

by Lee.Davison＠merlincommunications.com

>> There is just no pleasing some people. 8^)= >> http://zx.dyndns.org/trastero/cosas/droy/jupiter/ >> You want the .pdf near the end. > Interesting how he got blue as a background when the real Ace used > black..... I would guess he's using an RGB monitor, but can't say for sure as babelfish stops translating half way down the page. Curses! Lee. ________________________________________________________________________ This e-mail has been scanned for all viruses by Star Internet. The service is powered by MessageLabs. For more information on a proactive anti-virus service working around the clock, around the globe, visit: http://www.star.net.uk ________________________________________________________________________

23 years, 4 months

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