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101090 discussions

Sun E4000 Peripheral Power Supply broad?

by ray＠arachelian.com

Any chance someone has a spare? :-) I recently got my hands on an e4k, but the peripheral power supply seems dead. I took it apart and saw that the fuse is good, haven't had a chance to test its components, but thought I'd ask.

19 years, 11 months

CoCo2 spoken for

by dgy＠DakotaCom.Net

Hi, I have a few names of folks interested in the CoCo2. Thanks! --don

19 years, 11 months

OT-ish? McIlroy's "Synthetic English Speech by Rule"

by dgy＠DakotaCom.Net

My only claim to being *possibly* on-topic is the age of the article (1974) and the fact that it inspired many of the early phoneme-driven speech synthesizers (Votrax, etc.). Does anyone have access to a suitably good engineering library with a copy of: McIlroy, M D, "Synthetic English Speech by Rule", Bell Telephone Labs, CSTR #14, 1973 (though I have also seen it referenced as 1974!) or: Ainsworth, W A, "A System for Converting English Text to Speech", IEEE Trans Audio & Electroacoustics AU-21 #3 pp 288-290, 1973 The former is far more interesting to me than the latter :-( (sigh) There are *some* advantages to being a student (though those days are long past, in my case!) I can try my local public library to see if it is available via ILL. I guess I could also try the local university's engineering library. Thanks! --don

19 years, 11 months

Magtape market...

by julesrichardsonuk＠yahoo.co.uk

Out of interest, what's the market for unused, still-sealed magtape (9 track, 2400ft*, 6250bpi) like? I got hold of a few reels the other week and can't decide whether we should just put them to use them as/when necessary, or use them to raise funds for other museum projects... * well, near as I can tell. The scale on the reel goes from zero to 2000 in increments of 400 and is some way over the 2000 mark; I'm assuming it's feet! (did anyone ever sell magtape > 2000ft that *wasn't* 2400ft in length?) thanks Jules

19 years, 11 months

IC pin corrosion

by julesrichardsonuk＠yahoo.co.uk

Out of interest, are any particular types of environment harsher for IC leg corrosion than others? I've not seen that much corrosion about, other than surface stuff that can be cleaned off - but I'm currently trying to get an old Acorn System Three running, and about half the ICs in it are leaving some of their pins behind when removed from sockets as they've corroded right through :-( The PCBs are otherwise in very good condition, but for some reason a lot of the chips (most notably DRAMs and LS logic) are in a right state, and it would seem that *something* has been eating away at them - yet *some* of the ICs are totally corrosion-free (as are all the passives, IC sockets etc.) Luckily all the dead parts (so far!) are ones that I've got spares for, but it's just made me wonder what's accelerated the decay in some of the chips but not anything else (unfortunately I only picked this machine up last week so don't know its storage history, but I can ask the previous owner). Judging by the pretty good condition of the rest of the machine, I wouldn't say that it's been in a particularly high moisture environment. cheers Jules -- (\__/) (='.'=) This is Bunny. Copy and paste bunny into your (")_(") signature to help him gain world domination.

19 years, 11 months

Televideo TS-801

by pat＠computer-refuge.org

So, I picked up some new toys at "The Event" yesterday, and I was wondering... Does anyone happen to have copies of CP/M (or any other OS) for Televideo's TS-801? These seem to have a pair of 5.25" DSDD 48tpi drives, from what little information I've seen from google. I picked up a pair of TS-801's and a TS-806C (not to be confused with a TS-806), which is a "shared tape drive" box. I haven't found much info there that I can't figure out from a quick look at the machine, though.. Thanks. Pat (Wishing he could just ask Don for the disks...) -- Purdue University ITAP/RCAC --- http://www.rcac.purdue.edu/ The Computer Refuge --- http://computer-refuge.org

19 years, 11 months

FTGH: CoCo2

by dgy＠DakotaCom.Net

Hi, I'm just finishing up documenting this CoCo2. Then, unless someone wants to pony up for shipping >from 85751, it's headed to the landfill. (though I will probably steal the RF modulator off of it before doing so). Original cardboard box is showing signs of age... :-( Any takers? (only the lower 48 US, please) --don

19 years, 11 months

Shipping a Diablo series 30 drive

by aek＠bitsavers.org

> Has anyone here shipped one of these drives before? Look at the service manual on bitsavers. There is a triangular shipping plate to prevent the head assembly from sliding out.

19 years, 11 months

Looking for some HP LJ3 repair hints and a paper tray

by compoobah＠valleyimplants.com

> It's also been throwing 13 Paper Jam errors, but there's no paper jam >visible. Anyone know what causes this? I'm guessing the optosensor on the >fuser assembly has failed, but I can't identify the opto. Does anyone have a >part number for it? You might want to try a good cleaning first. I've had several laser printers display this issue, and it was likely just dust and fibers in the opto inhibiting the light path. A good way to test emissive IR components is with a CCD camcorder. Point the camera at the thing (remote . . . ) and the light will be visible on the monitor if it is functioning.

19 years, 11 months

old Solaris s/w, docs

by brad＠heeltoe.com

I have 2 boxes of old Solaris developer docs & cd's, mostly Solaris 2.1, 2.2, 2.3, maybe some 2.4. I think there is a compiler in their also. Answerbook, install, etc... If anyone wants them they are free for shipping (not light, I'll bet each box is 15lbs). -brad

19 years, 11 months

IDO 4.1 for IRIX 4.0.5

by compoobah＠valleyimplants.com

super-post-script: In the process of doing this research, IRIX scribbled over my filesystem while I was making a tarfile backup of a directory. I went to SGI's ftp server to see if I could find a recommended/required patchset, but all they had for IRIX 4.0.x was an updated Sendmail (in ftp.sgi.com/patches). Are older patchsets still squirelled away somewhere on the FTP site? (I'm looking for 4.0.5 and 3.3.2)

19 years, 11 months

IDO 4.1 for IRIX 4.0.5

by compoobah＠valleyimplants.com

Abstract: headers are there, not much else. I moved the IDO 5.3 IRIX4 files over to my P.I. and started playing around with them, and there is mixed news. Bits of IDO4.1 (the recommended IDO for IRIX 4) are there, including headers and cc, but other bits are missing (make, gendist, and other stuff that make life easier.) So news is mixed: it looks like you could concievably use the IRIX4 files on the freely-distributable IDO 5.3 to get a lot closer to having a development environment on IRIX 4.0.x, but you'll still need to supplement (big time) with GNU tools. I have the tarfile of the IRIX4 subrelease here if anyone wants it, but I don't think I'll put too much more work into making it nice. I use 3.3.2 more often on that machine, anyway. I believe there is also a way to cross-build on an IRIX 5 host.

19 years, 11 months

Thanks for the Donations

by jrkeys＠concentric.net

Thanks to all that have sent help in the form of money or labor offers for the two large rescues I have going on soon, but we did come up short on the money side. I have been given to the end of August to pick these items up and hope to borrow the money that is needed to complete both trips. I will be sending tax receipts to all the donors and will update you off list after everything is complete. Thanks again John

19 years, 11 months

Shipping a Diablo series 30 drive

by wmaddox＠pacbell.net

Has anyone here shipped one of these drives before? I'm looking for advice on the proper way to secure it for shipment. There is no obvious shipping lock mechanism, though the head actuator appears to be secured when retracted. --Bill

19 years, 11 months

Datarecovery from overwritten tapes was Re: Reading DC100a tapes

by g-wright＠att.net

-------------- Original message ---------------------- From: "Nico de Jong" <nico at farumdata.dk> > From: "Al Kossow" <aek at bitsavers.org> > > You should be able to connect the heads directly to the preamp, and use > the > > tapewizl directly. I was going to try recovering HP and Apple 40meg tapes > > this way using a TU58 transport. I haven't looked at the head geometry on > > the different drives that take DC100 carts yet, though. I know I've > scanned > > some documentation on the 3M transport, will need to see if I've pdf'ed it > > yet. > > > Would this principle work for recovery of 4mm (DAT) and 8 mm (Exabyte) > tapes? It happens regularly that customers ask if I can read "behind" a > small file they "happened" to write. I have no problems with 9 track and > 3480/3490's. > > Nico > If It Helps ........... Some place out there, there use to be a tape reading tool that would read the tape backwards. I believe is was run under linux ??? I have never used it. - jerry

19 years, 11 months

DSDD 3.5" floppies

by dgriffi＠cs.csubak.edu

While cleaning out the pile-o-stuff I came across half a metric buttload of DSDD 3.5" floppies. If anyone wants/needs some, I'll send 20 anywhere in the continental US for $2. -- David Griffith dgriffi at cs.csubak.edu

19 years, 11 months

Dec VT320 printset

by jim＠g1jbg.co.uk

Hi, I'm trying to repair a couple of these units, does anyone have the printset for them (or even just a circuit diagram)? Many thanks Jim Beacon. Please see our website: www.g1jbg.co.uk

19 years, 11 months

Troubleshooting video

by compoobah＠valleyimplants.com

> Is that R, G, B, and composite sync, or what? >I don't want to be appearing to 'teach grandmother how to suck eggs', but >how are you measuring the sync frequencies? Where are you measuring them? >waht instrument are you using? And so on.... Yep, RGB on seperate BNCs and H-V combined on another. I'm throwing a LeCroy scope onto the SYNC output and using the cursors to measure between the regular pulses. I pulled the graphics boardset and found one jumper (ext/int) that was set differently from Gerhard's model (thanks for the settings!) and I swapped that, which raised the sync frequency to 29.1 KHz. The total waveform looks like: 29.1-29.4 KHz negative-going pulses, with 134muS square negative pulses occuring at 66Hz (looks like it might be stuck in 33Hz interlaced mode). there are stronger negative pulses in line with the ~29 KHz sync at 400.96 Hz, and on top of that there are 174muS blanks in the signal (at the positive end) at 2.56 KHz -----\/---\/---\/---\/ (regular pulses) ---|_____|--- (vsync pulse, 66KHz) \/---------\ /---\/---\/ (the 2.56KHz blank and strong negative pulse) \/ not to time scale, and the strong negative pulse was the same duration as the regular horizontal pulses. The strong negative always occured after a blank, but not every blank. The Display Generator board is crystal-controlled (meaning I should have pulled it out all the way before pontificating) There is a set of jumpers on the main processor board (IP2) which are supposed to set resolution, with choices between 60Hz non-interlaced, 33Hz interlaced, RS-170A, and European Standard. These seem to make no difference. The jumper to select master/slave mode on the processor made a difference (dropped the sync to ~2KHz), so I know there is a control connection between the IP2 and the graphics. I checked the DIP switches, and they function. I suppose I could try the system with no processor and see what the default sync rate is. I'm wondering if the system (or parts) were set up for genlock of some sort, and is expecting something it's not getting. I'll throw the LeCroy on a Sun 3/160 and check the waveforms for comparison. Sorry, but you might need to "teach grandmother how to suck eggs", this is both the first computer video and the first scope I've really dug into. I found out really fast that my NTSC TV book doesn't help much. . .

19 years, 11 months

IC pin corrosion

by technobug＠comcast.net

> Incidnetally, I have heard of a TV set that leaked water onto the > floor, > and no the cause was not a vase of flowers on top of it. Any ideas? > > -tony > > Rear projection TVs of the older sort are water cooled... CRC

19 years, 11 months

Various tape/backup media available

by SUPRDAVE＠aol.com

Pay for shipping and add whatever else you'd like for the following tapes, all new. QW5122F plenty of these! MC3000XL Taumat format MC3000XL 2120XLF DC6150 DC600A QD9120 DC9250 these are used IIRC DC2080 MC3020XL three TK70 two 88meg syquest 105meg 3.5 syquest four HIFD 200meg floppy. <?> QG15M D8 8mm tape plenty of 2120 and 2120XL

19 years, 11 months

Reading DC100a tapes

by kevenm＠reeltapetransfer.com

I have a friend who has a DC100a tape with no way to read it. Just wondering if anyone here can and get data onto a pc. I do have a Colorado Jumbo 250 that I have used DC 2120 QIC-80 tapes with. But don't know if that would read DC100a tapes. Keven Miller kevenm at reeltapetransfer.com Orem UT 84097.

19 years, 11 months

Reading DC100a tapes

by vp＠drexel.edu

"Nico de Jong" <nico at farumdata.dk> wrote: > Seems like a dead end to me, unless a working HP85 could be found. Well I have a couple of HP-85s and HP-9915s (the embedded version of the HP-85). I also have an HP-9825A which also uses the same type of tape. However, if the tape was not recorded on a similar machine it will probably not be readable by my machines. > I don't know about TU58 yes its the same, but the TU58 uses preformatted cartridges (can't format cartridges on its own). While the cartridges are physically identical to the HP ones, there is no data compatibility. **vp

19 years, 11 months

Laser 128 please help

by bob099＠centurytel.net

thanks for the help, now to find a dos disk, 3.3 or pro

19 years, 11 months

Troubleshooting video

by compoobah＠valleyimplants.com

Pat wrote >You do realize that the "stuff" we talk about on classiccmp are usually things >that aren't PC's, right? Yep, that's why I posted here :-) - it's a SGI IRIS 3130 68020-based Multibus machine. I'm sorry that I gave the impression it was a PC, I was just trying to not scare off anyone who hasn't ever worked with one of these beasts but who knows about computer video/graphics systems. I did pull some numbers from the XF86 PC modeslist to see if what I was seeing was close to "normal", it didn't seem to be. Jules wrote >I suppose it's just possible that you could do interlaced 1024x768 with a >28KHz signal, but it'd be hell on the eyes. Possibly that's the SGI's default >though if it can't detect what monitor you're plugging into it? (scratch that >idea if the outputs are BNC, but if the video's done over some form of >multi-pin connector, might it not need strapping in a certain way to indicate >display type?) The monitor connection is 4BNC. I wasn't sure about the interlaced - it seemed that mathematically it should be 24 KHz (48/2), but if 28KHz could be it, I'll look again. There's a switch that's supposed to select interlaced/non interlaced. I guess next stop is to check if that's being read properly, since flipping it doesn't seem to make a difference. I'll also try to find the crystal oscillator (thanks, Tony), perhaps it's on the Update Controller? I think the interlacing must be for linking it up with a TV system, since the monitor can't do 30Hz interlaced. Standard refresh is 60Hz (per the IRIS FAQ)

19 years, 11 months

System 36 available (Keele uni, UK)

by julesrichardsonuk＠yahoo.co.uk

Afraid I know of no details on this one - other than a rough location (Keele uni, or at least that's where the chap who has it works), contact number, and that any rescue is fairly urgent - it's heading into a skip rather soon. If there's likely to be any interest, do shout - I can always phone the guy and get more details. cheers Jules

19 years, 11 months

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