test-drb

test-drb@ccmp.vtda.org

101090 discussions

by cclist＠sydex.com

> Date: Sun, 27 Jan 2008 19:32:35 -0800 > From: Brent Hilpert <hilpert at cs.ubc.ca> > > I thought it was "Amphenol 57 Series". > > I suspect "Blue-Ribbon" may be the name of the original larger style, and > "Micro-Ribbon" is the name of the smaller style more popular now-a-days. > > If that's correct, the plug-in input modules for 60's-era tube Tekky > scopes (for example) used a Blue-Ribbon connector, while the Centronics > connector is a Micro-Ribbon connector. Going fom the Amphenol web-site, 57 > series appears to be either a synonym for the Micro-Ribbon series or a > subset of the Micro-Ribbon series. I've heard the telco variety also called "Champ" connectors. You used to see a lot of them used to connect desk sets (e.g. 2565) to a PBX or 1A2 KSUs. Also known as an RJ21 connector. The 36-pin Centronics as well as the 24-pin GPIB variety are both members of the Amphenol "Micro ribbon" family. The same 50-position connector type was used quite a bit for connecting SCSI-I devices. Cheers, Chuck

18 years, 2 months

6800 C compilier

by grant＠stockly.com

Is there a 6800 C compilier for CPM or DOS? I've been looking but can't seem to find one. If anyone knows where I could get one that would help me out a ton... Grant

18 years, 2 months

Dead IBM PC 5150 motherboard - help troubleshooting

by richard.beaudry＠gmail.com

Hello all and thanks for the suggestions... Here's the story so far: 1) Power appears good -- measured correct voltages at power supply header on motherboard, and at various chips on the motherboard. All seem to be within specs 2) "Power good" line stays at +5VDC -- I believe this is correct, and signals that power is indeed good 3) Processor reset line -- at power up, briefly goes to +5VDC, then back to 0VDC and stays at 0VDC -- I don't think it is active low, so this should be correct, right?? 4) Triple-checked configuration switches, and they are correct for the configuration 5) Clock input to 8088 is dead-on 4.77xxxxxx MHz (my scope shows all the digits, but I don't remember them :-) -- I think the 4.77MHz is close enough). 6) One thing that seems odd is that the ADxx (Address/Data) lines seem "stuck". The scope does not show a waveform, and measuring with a meter shows some lines right at +5VDC, some at about +4VDC and some at 0VDC. Perhaps the processor is indeed HALTed??? That's where I am right now ... I'll remeasure the ADxx lines, and post the full list of values .... Thanks again for all the suggestions!!! Rich B.

18 years, 2 months

The Centronics connector

by dm561＠torfree.net

----------Original Message: From: Fred Cisin <cisin at xenosoft.com> Subject: RE: The Centronics connector On Mon, 28 Jan 2008, dwight elvey wrote: > Hi > Things seem to have drifted a little. It is the wire combination > that I'm interested in. I'm aware that the connector was there > before the printer. > It looks like to the best of knowledge, the 101 may have been > the first. What type of printer was that? ISTR that there was also a 100 ? The 101 was BIG. It was HEAVY. Substantially bigger and heavier than Laserjet -. It was fast. It was LOUD! But, it would fit into the back of a Civic hatchback. I had one sitting around for years. I took it to some of the John Craig Computer Swaps in San Jose, and siome of the "Northwest" ones in San Mateo. I could not sell it. Not for $100; not for $50; not for $20 I gave it to City College Of San Francisco in 1983? when I was doing some part-time teaching there. They stated a value of $1200! so I got a LOT more off of my taxes than I could have gotten from a sale. IF they have stopped using it by now, then it was NOT because it was worn out. -- Grumpy Ol' Fred cisin at xenosoft.com ***********Reply: I used a 101 for years; great machine, similar in size & weight to the line printers I was using at Burroughs, even used a form control tape. Also as noisy; it was in a back room of the basement, connected to the CBM 8032 in my upstairs office with a 50 foot ribbon cable. Length restrictions on parallel cables? Feh! Still have the cable and many of the printouts... mike

18 years, 2 months

8" floppy connector READY signal

by ccmpcpg＠yahoo.de

Hi, I've built the 8" <--> PC adapter described on Dave Dunfield's site. It works well with an 8" drive from an Olivetti M40 system. But it doesn't work with a Shugart SA851 drive. Now, after checking the pin description in the SA851 OEM manual it seems that the SA851 uses pin #22 instead of pin #12 for READY. I haven't tried yet whether the adapter works if I change it for pin #22... I'm just asking if it's a well known fact that there appear to be different layouts of the 50pin 8" floppy connector. I was under the impression that it is quite standard. I'll probably add a switch to the adapzer to select between pin #12 and pin #22. regards, chris __________________________________ Ihr erstes Baby? Holen Sie sich Tipps von anderen Eltern. www.yahoo.de/clever

18 years, 2 months

On collecting printers...

by tsw-cc＠johana.com

On a previous message, dwight elvey <dkelvey at hotmail.com> said: > Hi > Does anyone know which Centronix ( sp?) printer the 36 pin connector > for parallel printers became standard? > Dwight It seems that they started using it in the mid 70's. The connector was an Amphenol 36 pin "micro-ribbon" type, one of the various sizes available. As a point of reference IEEE-488 (HPIB) standardized on a 24 pin version of the connector, and the phone company (It was called the Bell System in those days) used a 50 pin version for their cabling of telephones (25 pair cables as well). The connectors were pretty common, and worked VERY well, as the wiping contacts were ultra reliable. In the lab where I was working at the time had standardized on the 50 pin version for connecting things together (this was in the mid 60's). So, the connector has been around for quite a while. Of course, I could comment on their choice of pinouts, being as how they switched the ground return from one side of the connector to the other about 1/2 way down (what were they thinking!). The problem is that this is now standard, and nobody wants to change it. (*SIGH*). In that era of computing (electronics) many connector styles were used. Some stayed on, and others died. The "D-sub" is another style (DA-15, DB-25, DC-37, DD-50 (three row!), and DE-9). People fail to understand that the "D" is the connector style, and the letter following (A-E) is the size of the connector. When IBM went to the DE-15 connector for VGA, they might have shown some people, but it still amazes me that the 9-pin connector (properly called a DE-9) is referred to by an incorrect name (not mentioned here!). -- Sorry, No signature at the moment. ____________________________________________________________________________________ Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs

18 years, 2 months

The Centronics connector

by aek＠bitsavers.org

>> Does anyone know which Centronix ( sp?) printer the 36 pin connector >> for parallel printers became standard? > I think it was the Centronics 770. It had severe problems though, > Centronics had to pull it from the market and thats when Epson jumped >into the market -- Try at least 10 years earlier. Models 101 and 306 used them (early 70's)

18 years, 2 months

Toshiba T3100 Techref

by cclist＠sydex.com

I just noticed that I have a Toshiba T3100 technical reference manual on my shelf. There's no possibility that I'm going to need it. Anyone collect these beasts who's looking for such a book? No schematics, but lots of programming information. Cheers, Chuck

18 years, 2 months

replies to cctech Digest, Vol 53, Issue 52

by jeffj＠panix.com

------------------------------ From: "UnR00ster" <unr00ster at gmail.com> Subject: Re: 27256 in place of a 2764 >> Under what conditions can a 27256 be used in place of a 2764? I have a >> schematic that calls for the latter, of which I have none, >> but I have lots of the former. > See Ray Carlsen's site > http://staff.washington.edu/rrcc/ > http://personalpages.tds.net/~rcarlsen/cbm/eprompla.txt > adapters http://staff.washington.edu/rrcc/uwweb/EPROM/2x256.gif > and http://staff.washington.edu/rrcc/uwweb/EPROM/2x128.gif > This is all for Commodore stuff, but the idea of using a > modified socket and 512K chip should work for you as well. Very clever! I used to get EE trade rags and a regular advertisor was a socket maker of "correct-a-dip": a daughter-board that you slip under a chip to correct the pinout or add other parts, kinda like the Slocket adapters for CPUs. That's a nice way to do-it-yourself with easy to use, readily available parts and no custom fabrication! ------------------------------ From: "Chuck Guzis" <cclist at sydex.com> Subject: Re: Fast 8Kx2 ROM replacement Message-ID: <479CF645.31339.23B64E5 at cclist.sydex.com> > I don't have the message archives, but I don't think that anyone > mentioned the Cypress CY22016L NVSRAM using QuantumTrap technology. > > Pretty cool stuff; very fast SRAM backed by NV RAM; > at power-up, the SRAM is loaded from the nonvolatile store; > at power-down, it's written (optionally and probably not needed for this application). > > The SRAM has access times of 25, 35 or 45 nsec. and unlimited writes. > The NV RAM is guaranteed for 1,000,000 writes. Why not try for a free sample of the Freescale Magnetoresistive Random Access Memory (MRAM): it's fast and needs no power at all. The largest seems to be P/N PR2A16AVYS35 4MBIT http://www.freescale.com/ ------------------------------ From: dwight elvey <dkelvey at hotmail.com> Subject: RE: 8-bit micro MMU's Message-ID: <BAY138-W18819E7D5B0F64A4281812A3340 at phx.gbl> > One thing that is worth doing that I've seen done on > a Z8000 system is to map instruction memory into > a different area of physical memory than the data memory. > I don't recall but I think there is status information from > the Z80 about what type of fetch or store is being done. I was pondering that long long ago: using the M1 line to differentiate instruction fetch from data read/write. Just one thing: unless it's an embedded system running only from ROM, the loader needs to re-map data areas into program/executable space. Before pipelines, pre-fetching and caches, CPUs accessed RAM with a steady pace and pattern. I can't be the only one to ponder using a Z80 where the M1 cycles (opcode fetch, refrech) went to ROM and non M1 cycles went to RAM, thus allowing other devices to "cycle steal" access to the RAM without interfering with the CPU execution at all (unlike DMA which halts the CPU, or at least all the CPU's bus access). -- Jeff Jonas

18 years, 2 months

A sign of the times

by cclist＠sydex.com

Date: Mon, 28 Jan 2008 11:44:22 -0600 From: Jules Richardson > Does the old printer do what you need better than a new one (build > quality, interfaces, print quality, reliability)? (although you hint at > some answers to that above) Build quality? No--I've mentioned that the Panasonic's an industrial- grade beast. Interfaces? Both have parallel; I've never used the serial or Appletalk interface on the Panasonic, which doesn't have USB. The new Brother is head-and-shoulders above the Panasonic regarding print quality; 1200 dpi vs. 300. Reliability? Hard to say at this point, although I've owned the predecessor model to the Brother for a couple of years and never had a problem. Speed? The Brother is much faster, particularly when rendering graphics; the halftones are superb. At this point, a big factor--cost of operation skews things a lot. Replacement drum and developer cartridges for the Panasonic are getting pretty dear. > How does the expected lifetime if given a new drum stack up against the > cost of new printer(s) (which IME don't seem to be very serviceable or > built to last) While I might find a NOS drum for the Panasonic on eBay for a good price, I'm also aware that the shelf life of OPC drums is finite. If I elect to purchase a remanufactured drum unit, it'll cost me more than $100 plus shipping. The Brother cost me $40 shipped. I suspect that for the shipped price of a single Panasonic drum unit, I could buy three Brothers and stash two of them away for the future. > How guilty do you feel about sending something which could be repaired off > to landfill? It wouldn't go to the landfill. I'd disassemble it and send the metal parts off to recycling and hang onto any interesting mechanicals and electronics for my hellbox. I might try freecycling it, but I saw an HP color laser recently go without a single nibble on the local Freecycle. Some old things, however well made, seem to be eclipsed by more modern technology. Cheers, Chuck

18 years, 2 months

Some new pics available online from the 60's about SEL

by ragooman＠comcast.net

I added some new pics from the 60's about SEL in the gallery There's some with machines used in the glory days of NASA during the Apollo moon project Thanks to Al Kossow and Bob Rosenbloom for helping me find some of these Feel free to take a look http://www2.applegate.org/~ragooman/computers_mini_gallery.html =Dan

18 years, 2 months

8-bit micro MMU's

by thrashbarg＠kaput.homeunix.org

Hi, I'm working on an Z80 MP/M II server for my 8080 CP/M computer and I have been designing a MMU for it. I thought I'd post it here because it could be useful to other builders or better still to talk about any flaws or improvements. The circuit diagram is here: http://kaput.homeunix.org/~thrashbarg/MMU.png Configured like that it is capable of accessing 256kB of RAM with write protection, or 512kB without write protection by using the 'Mem WE' output as an address line. The logical address range is divided up into 2kB pages, where those pages can be of any 2kB page in the physical address range. It's more of a Memory Mapping Unit than a Memory Management Unit. MP/M II needs to remain resident in the highest 13kB of RAM so having the write protection will prevent any runaway processes from crashing the system. 50kB of RAM can be made available to the running program. Pages can be duplicated in the logical address range, so if a process only uses say 4kB of RAM only three pages need to be allocated to it, two for the program itself and one to fill the rest of memory. There may be a need to have a table on disk to tell the OS how many pages to allocate, because a program may use less space on disk than what it requires in memory. The Process ID is determined by the 74174 to the left of the SRAM. When the process changes the 2kB bank making the switch must not change or the program will be moved and probably crash. In MP/M II this wont be an issue because the system bank isn't supposed to move. In this configuration there is a total of 64 processes, 63 if you don't include the system as a process. When an interrupt occurs it clears the PID register to zero so the system can be called to service the interrupt request. The 74175 to the far left controls the MMU and ROM. The ROM is enabled after a reset and the MMU is disabled. This is done by deactivating the left CS of the RAM and connecting the upper address bits of the CPU directly to memory. The remaining two or three address lines should be tied high with resistors, or even connected to the 74LS244 with those inputs tied to +5 or Ground. The tricky element is the 2kB dual port SRAM. I found two of them on an old arcade game board. This lets the CPU program the mapping of memory without having to implement a messy multiplexing system. To program a bank an 11-bit address is loaded into ports F9h and FAh, then the desired bank is programmed to port F8h. The lowest 5 bits of the address selects the desired 2kB page the CPU will access and the remaining 6 digits determine the PID. Maybe they should be split up so one port selects the page and the other selects the PID. Maybe someone can use this? I haven't looked deeply into the MP/M II XIOS requirements so I may have left something out that it needs so is anyone familiar with the XIOS? Cheers, Alexis.

18 years, 2 months

Backing up VAX/VMS?

by mjd.bishop＠emeritus-solutions.com

Building on previous posts: Standalone backup can be installed on the system drive, it gets installed as [.SYSE] and is then started by: >>> B /R5=E0000000 DKA300 Any disks it needs to use must be ready before it goes looking for them during initialisation. The one off creation of the standalone backup kit (i.e. [.SYSE]) goes something like: $set def sys$update $@stabackit [Ref VMS System Manager's Manual] Standalone backup has some limitations, e.g. at ~V5.5 it only supports a cluster size of 1; i.e. it only supports disks up to 1 Gby. This means that you can't use it with RZ27/28/29 StorageWorks (1/2/4/8/.. Gby) disks. On a machine with a SCSI bus and with spare scsi disks to hand my preference would be to write the backup to another blank scsi disk as a save set, and then to archive the backup on modern hardware. The save set condenses the disk to it's minimal file size, and on restore you get a "fresh" copy with contiguous files. The basic incantation is: $init DKA200 volnam /nohigh $backup/image/verify DKA300: DKA200:filename.sav/save It's best practice to fix up any lint on the disk prior to backing up / archiving it, i.e. to resolve any block allocation / file index inconcistencies: $analyse/disk DKA300: -- generates a list of issues $analyse/disk/repair DKA300: -- lists and fixes any issues $analyse/disk/read DKA300: -- reads all the blocks and tells you which ones have irrecoverable parity errors With three spindles on a system you can produce a compact copy of a disk image, with the file index at the beginning rather than the centre of the disk. One spindle runs the system and backup, another disk (which could also be the system disk) has a saveset copy of the imaged disk on it, the final disk will be initialised and have the saveset written to it. $initialise dkb000 /index=beginning/nohighwater $mou/foreign dkb000: $backup/image/verify/noinitialise dka200:filename.sav/save dkb000: The reason for doing this used to be to produce the smallest possible "necessary" disk image for burning on a CD or whatever. Nowadays, I would probably copy the entire disk - GigaBytes are cheap, ensuring you have copied to the HWM can be expensive. Obviously, a live disk volume should have the file index in its default location at the centre of the disk. IIRC there are/were some (free) SalesWare utilities which permit Files-11 disks to be mounted on XP and read. This would provide a much neater (and safer) way of eliciting the .sav (save set) file for archival on a PC than croping an image at it's high water mark. However, dd of the entire disk containing the savesets may be even better. Regards Martin

18 years, 2 months

27256 in place of a 2764

by dgriffi＠cs.csubak.edu

Under what conditions can a 27256 -- David Griffith dgriffi at cs.csubak.edu A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail?

18 years, 2 months

Ladder-shaped belt

by mike＠brickfieldspark.org

Is the ladder belt a belt or a chain ? I have seen metal chains in the "ladder" format, each "rung" looped to the next, could be extended or shortened very easily, used to be used on model cars a lot for the four wheel drive. HPC Gears have plastic ladder chain http://www.hpcgears.com/newpdf/ladder_chain.pdf and plastic chain http://www.hpcgears.com/newpdf/ladder_chain.pdf is that the sort of thing ? Mike > ------------------------------ > > Message: 20 > Date: Sun, 27 Jan 2008 11:08:45 +0000 > From: Gordon JC Pearce <gordonjcp at gjcp.net> > Subject: Ladder-shaped belt > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Message-ID: <1201432125.7318.13.camel at elric> > Content-Type: text/plain > > > On Sat, 2008-01-26 at 22:13 +0000, Tony Duell wrote: > >> The drive belt fro an HP9871 (daiswheel printer, the belt is about 2m >> long and looks like a ladder. I am told none have survived. This is one >> printer I would love to find, just to see if I can work out some >> alternative) > > I'm guessing that the rungs of the ladder go between teeth on the > pulleys, and the rails of the ladder keep the belt in place? In which > case, I'd get the closest matching toothed belt I could find and fit > little metal end cheeks on the pulleys to stop it sliding sideways. If > you were tight for space, you could probably get away with only one > pulley. > > Gordon > >

18 years, 2 months

the non-existence of printer collectors

by cclist＠sydex.com

> Date: Sun, 27 Jan 2008 19:59:30 -0700 > From: Richard <legalize at xmission.com> > I knew a guy that wrote an "alarm" program. He would be there late > at night working on the LA-36. When he felt sleepy, he would run his > alarm program. It would move the carraige on the LA-36 to column 132 and > wait. At the requested time it would beep several times. If you didn't > press return, it would print a carraige return, bringing the print head to > the left hand margin again. He would sleep with his hand in the printing > area and if the beep didn't wake him up, the print head slamming into his > hand would do it :-). On that Diablo dot-matrix, it wouldn't just wake him up, it'd probably send him to the ER with some fractures. I think the carriage servo was run from either 48 or 24VDC. I've still got a spare from a Durango printer (same design people). It's basically a 48v Litton Clifton PM DC motor with an attached encoder. I was told that it cost more than the rest of the mechanicals on the printer combined. The other odd thing with the Diablo was that it used several early Rockwell MPUs (at least more than one). PPS-8 or PPS-4, perhaps? I remember seeing and using a really oddball printer in the early 70's from Singer-Friden. It used a disc type element oriented vertically and perpendicular to the paper surface, a leadscrew for advancing the carriage and a big honking spring for carriage return. The type element was inked by means of a felt pad (no ribbon) and tended to leave nice vertical ink stains on the paper when not printing. Very similar to that used on the Singer-Friden 115x calculators, but scaled up for 14" tractor-feed paper: http://www.oldcalculatormuseum.com/friden1152.html When the project shut down, the call came down for the lot to be scrapped, but a co-worker arranged for one to "disappear" off the loading dock. I don't know if he ever pressed it into use. Cheers, Chuck

18 years, 2 months

Fast 8Kx2 ROM replacement

by cclist＠sydex.com

I don't have the message archives, but I don't think that anyone mentioned the Cypress CY22016L NVSRAM using QuantumTrap technology. Pretty cool stuff; very fast SRAM backed by NV RAM; at power-up, the SRAM is loaded from the nonvolatile store; at power-down, it's written (optionally and probably not needed for this application). The "juice" for the optional write-back on power-down is guaranteed by at least a 68 uF capacitor. The SRAM has access times of 25, 35 or 45 nsec. and unlimited writes. The NV RAM is guaranteed for 1,000,000 writes. It's a 5V part and comes in a 28-pin SOIC, so it'd fit nicely on a small PCB that'd fit the outline of a 24 pin PDIP. Here's the datasheet: http://download.cypress.com.edgesuite.net/design_resources/datasheets/ contents/cy22e016l_8.pdf This family comes in sizes ranging from the 2Kx8 just mentioned to a 512Kx8/256Kx16 item. Cheers, Chuck

18 years, 2 months

the non-existence of printer collectors

by cclist＠sydex.com

Date: Sat, 26 Jan 2008 20:24:36 -0500 (EST) From: djg at pdp8.net > Those old line printers had such a nice impressive sound. At least looking > back and when you will be doing short printouts on a classic computer. > When you had to listen to it all day not so good. There is no way that I would want to own and operate a CDC 501 (drum) or 512 (train) printer. Changing the ribbon, even with the provided gloves was a messy job (who knows if ribbons could even be found anymore), and when one of those ribbons got tangled up in the 512 type train, it was an hours-long incredibly messy job digging the bits and pieces out. Inevitably, you'd find that you'd assembled the type train with a character swapped here and there. The old drum printers tended to suffer from the wobbly line syndrome, where characters would be displaced from a straight line in a vertical direction. On the other hand, the train printers, while creating nice straight lines, would often displace characters in a horizontal direction. The former was far more noticeable than the latter. In the mid 70's, my lusted after personal printer was one of aftermarket Teletype model 40(?) band printers. About 300 lpm, I think and basically a tabletop unit, usually sold in an acoustic enclosure. Print quality was pretty good (upper- and lowercase), unless you printed a lot of dumps, whereupon the '0' would get kind of fuzzy after awhile. I still have a copy of the OEM manual for one of these if anyone's interested. I briefly had a Diablo dot-matrix printer--the carriage servo could crush your hand if you were stupid enough to put it in the wrong spot. An incredibly noisy screaming demon of a boat anchor. I got rid of it while I still had my hearing. Cheers, Chuck

18 years, 2 months

On collecting printers...

by tsw-cc＠johana.com

It isn't difficult. But as anyone who knows, you must collect IMPACT printers! None of this silly laser stuff, or even worse an ink-spitter (they actually has ones that did!). Me my collection has a few: An older wide Decwriter (LA120?) A narrow DecWriter (LA30) that I modified to do upper and lower case. A nice Centronics 300 LPM band printer. A couple of Daisy-Wheel printers. Some actually work. The Qumes; I have a Sprint3/4 (depending upon the boards) with a keyboard, a Sprint 5 (RO). I also have a couple of Diablo ones that use the metal wheels. Then there are the OTHER ones: A couple of Noisy-90's (Silent 700s) of various types (some portable, some not). No to be true printer collector, one must have an impact printer somewhere. Even a teletype would do in a pinch (somewhere I've got an ASR33 stashed). On topic stuff: I've got some prints of the Qume printers somewhere if anyone is interested. They are pretty simple to interface. I used a MC6821 PIA and a few chips. Pretty easy. Good luck to all -- Sorry, No signature at the moment. ____________________________________________________________________________________ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ

18 years, 2 months

non-existence of printer collectors...proven wrong

by cclist＠sydex.com

> Date: Sat, 26 Jan 2008 11:29:59 -0600 Okay, so who wants a working Diablo Hitype II? Spare wheels and (probably dried-out) ribbons. Free for pickup, or for the cost of shipping. RS-232C interface. This is the RO model, not the KSR. Cheers, Chuck

18 years, 2 months

Wave Mate Bullet boot disks

by lynchaj＠yahoo.com

Hi, Does anyone have some Wave Mate Bullet boot disks? I have one of these computers and I think it works but have no boot disks. The disks are 5.25" soft sector so all I need is an ImageDisk or TeleDisk image of your boot disk and not a physical copy. If your Wave Mate Bullet is using 8" disks those might work too. However, it would be better if you could attach a 5.25" drive and format and SYSGEN the disk, copy some CP/M files to it and make an image of it. The Wave Mate Bullet says "Microcomputer Rev C" on the motherboard. Much appreciation in advance if anyone could help me out. Thank you! Andrew Lynch

18 years, 2 months

non-existence of printer collectors...proven wrong

by n8uhn＠yahoo.com

While we're on the subject, i'd like to collect one certain type of printer. one or two examples of one would be nice but, the problem is finding them and shipping them. i'm in Michigan usa and all the "good" stuff seems to be on the other side of the nation or in the UK ;) oh, the type of printer? belt or chain thier called. centronics or serial interface. ever since i saw the belt printer used in the ibm sys 32, i wanted to find a pc compatable one. do they even show up on ebay? anyone know of makes/models i should look for? Bill ____________________________________________________________________________________ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ

18 years, 2 months

Zenith Data Systems Terminals at U of Washington auction 2/2/08

by innfoclassics＠gmail.com

Spotted in the University of Washington's Auction Catalog are 8 Heath Zenith Terminals. I don't think they are Z100 all in ones as I don't see any drives. Lot 40. http://www.washington.edu/admin/surplus/feb2008catalog.html A Sun pallet including at least 3 SGI O2s and 3 large sun servers. And a bunch of older stuff. Lot 44 I am not going to make the sale. It is in Seattle Washington, Feb 2. You can bid online. Pax -- Paxton Hoag Astoria, OR USA

18 years, 2 months

UK assistance requested

by cclist＠sydex.com

Hi Folks, I just got off the phone with a very nice gentlemen from Amersham who's trying to get an old PC program (on 3.5" media) going on his modern PC system. He's run into one of the copy-protection schemes that worked fine under MS-DOS but not under 2K or XP. I suspect that one of the copy-protection-defeating programs may be just what he needs. Any help I can offer will be at a distance of 5000 miles. I was wondering if anyone on that side of the Atlantic might be willing to help out. Drop me a line if you're interested and I'll put you in touch. Thanks much, Chuck

18 years, 2 months

Tandy 2000 available

by rcini＠optonline.net

All: I need to clear space in my shop and refocus my projects a bit. So, I?d like to divest my Tandy 2000. I bought it last year and refurbed it with a new 20mb hard drive and a second floppy drive. It has the color graphics board, 640k of RAM, a CM-1 monitor, VM-1 monitor, a few spare parts, software and books (in various conditions). The case is gleaming white ? the person I got it from must have kept it in the dark because there?s no fading/yellowing at all. I was going to use this for an emulation project but realistically, I?m not going to get to it. Contact me off-list if interested. Shipping would be from 11791 (Long Island, NY) in three or four boxes I?m guessing. Rich -- Rich Cini Collector of Classic Computers Build Master and lead engineer, Altair32 Emulator http://www.altair32.com http://www.classiccmp.org/cini

18 years, 2 months

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2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

1997

test-drb