test-drb August 2007

test-drb@ccmp.vtda.org

221 participants
459 discussions

Building my own classic style computer update

by ajp166＠bellatlantic.net

> >Subject: Building my own classic style computer update > From: "Joe Giliberti" <starbase89 at gmail.com> > Date: Thu, 23 Aug 2007 18:11:28 -0400 > To: cctalk at classiccmp.org > >>SNIPPAGE>>> >of them I don't even know what they are, and some I cannot find online, >presumably because they are obsolete. Here's a partial list of them: >NEC D780C NEC version of Z80, fully compatable. >NEC D770008AC-6 NEC, may be an 8bit ADC. >NEC D4364C-15L 8x8k dynamic ram 150ns >NEC D8251AC USART, serial same as intel 8251A >NEC D449C 2kx8 CMOS static ram 450ns and two chip enables and retains data down to 2V in standby mode. >AMD AM9511A-1DC AMD arithmetic procesor >Sharp LH0081A >Sharp LH0082 I think these are Opamps or maybe line drivers. >Intel 8339 >Intel 8325 >Intel K3235001 Intel 83xx is likely a 1983 date code. The Kxxxxxx is a mask/date code for a rom based part. None of those cross to any part I can reference and my intel databook set is complete from 1977 through 1993. Those are likely "house numbers" if they are not date codes. Since no other rom parts were listed I'd assume they are ROMS. >Zilog Z8442BPS Z80 SIO, dual serial >Zilog Z8430BPS Z80 CTC, timer counter chip Allison

16 years, 8 months

Gooey TU58 rollers

by iamvirtual＠gmail.com

I am trying to get a Vax-11/750 machine up and running. It looks like the TU58 drive is suffering from the 'gooey roller syndrome'. I see that people have successfully used 1/2 inch (ID) Tygon tubing to replace the goo. Is there any specific type of Tygon tubing (eg. R3603, R2000, etc.) that is used? Thanks! --barrym

16 years, 8 months

Catweasel Definitions (WAS: Catweasel Northstar Project)

by jzg22＠drexel.edu

While I cannot help you with the catweasel northstar project, I do know that at least the linux cwtool toolkit is missing a number of disk definitions which are very useful and common. It does NOT normally support: SSDD 5.25 8 sectors/track 160k SSDD 5.25 9 sectors/track 180k DSDD 5.25 8 sectors/track 320k SSHD 3.5 18 sectors/track 720k <- very unusual format SSHD 5.25 15 sectors/track 600k I produced some simple definitions for these 5 modes (by hacking the msdos_dd_5.25 definition, which is DSDD 5.25 9 sectors/track) which will work for reading but are probably not good enough for correctly writing the disks owing to timing differences. Please email me if you want them. It DOES support: msdos_dd which is DSDD 3.5 9 sectors/track 720k msdos_hd which is DSHD 3.5 18 sectors/track 1440k msdos_dd_5.25 which is DSDD 5.25 9 sectors/track 360k msdos_hd_5.25 which is DSHD 5.25 15 sectors/track 1200k and a number of extended msdos_hd modes which use extra tracks and other tricks to achieve the following sizes: 1476k (82 tracks) 1494k (83 tracks) 1600k (20 sectors/track) 1680k (21 sectors/track) <- DMF format used by Microsoft for Win95 disks, among others 1722k (82 tracks, 21 sectors/track) 1743k (83 tracks, 21 sectors/track) 1760k (11 sectors/track, 1024 byte sectors) 1802k (82 tracks, 11-19 variable sectors/track, 1024 byte sectors) a couple variations of those are missing too: (82/83 20 sectors/track; 82/83 11 sectors/track 1024 byte sectors; 80/83 11-19 variable sectors/track 1024 byte sectors). It does not support the 1880k 2m or 1992k fdutils formats. It also supports a number of commodore, amiga, atari, and apple/mac modes, though probably not all of the possibilities. It also does not support the Sirius 1/Victor 9000 9-speed/rate-zone GCR 5.25 format, which probably will require adding an entirely new GCR mode to the source code. Both single and double sided versions of this exist. I can only test the single sided versions because head 1 is inoperable (blown/open? needs further testing, doesn't seem to either read or write) on my Victor 9000. I have not even attempted to write a definition or GCR code for this yet, and could use any assistance available. My goal is to get ALL of this stuff supported by the cwtool catweasel driver eventually. OP: Sending the original request message 3 times was unnecessary. -- Jonathan Gevaryahu jgevaryahu(@t)hotmail(d0t)com jzg22(@t)drexel(d0t)edu

16 years, 8 months

craigslist: Commodore PET - $25

by paulrsm＠buckeye-express.com

Seen on craigslist: Vintage 1970s Commodore PET working - $25. Located in Ann Arbor, Michigan USA (near Detroit). http://annarbor.craigslist.org/sys/406092686.html I can help with pickup and shipping if anyone here wants it.

16 years, 8 months

Any AS/400, twinax, old networking/telecom gear collectors near Roanoke Va 24012?

by oldcomps＠verizon.net

Greetings! I have a collection of older AS/400 parts, including what should be a complete system (I believe its a 9406-200?), plus several twinax printers and some terminals (including one or two color ones), plus some twisted-pair token ring networking bits and some older telecom gear. I'm going to try to sell this stuff, but the larger parts (the AS/400 is in two racks, a "9331 Disk Unit" and a "9406 General Purpose" rack both of which are about 6' tall), plus the 6262-T12 printer are so large and bulky that I'd prefer to not have to put them on a pallet to ship them anywhere. I've thought about parting them out instead or just hauling the lot off to the local electronic recycling company, or finding out if there's anyone on this list that could pick them up. I have two other IBM racks of the same basic type as the AS/400's that have been stripped of the power strips and interior foam; these have a little spot rust on the outside but if someone needs one or both of them they'd be available. They're deeper than most rail systems I've seen can accommodate so using them for rackmounts requires extensions to be made or purchased for the rails. I also don't think they have their doors anymore. So - is there be anyone more or less local to me that would be interested in the large bits? Is anyone on the list needing baluns or twinax cables? I've got lots of those and if you need some I would be willing to ship them prepaid for a small fee to cover my gas to get them out. I have the "MULIC" tape for it around here somewhere but I parted with all of the other tapes some time ago - mostly to Red "Bear" Stricklin on this list. It does have two EMC raid arrays which I presume work. Caveat: I'm an AS/400 ignoramus. I can provide descriptions and pictures of things but what some of this does is beyond me. It all should work, to my knowledge it was working when I purchased it, but I do know that the AS/400 was connected to a more modern smallish AS/400 and part of the system I have was no longer in use. Contact me off-list if you're interested for a list. I hope to have a website up sometime soon with a list of the parts I've got. -- Frank ------------------------- ------------------------------------------------------------------------- C. Frank Helvey email: cfhelvey at yahoo dot com President home phone: 540.947.2526 Montvale Software Services PC work phone: 540.947.5364 Blue Ridge, VA 24064 cell phone: 540.529.3740 Classic Comps Email: oldcomps at verizon dot net

16 years, 8 months

Looking for an UCSD-pascal & Apple-II loan (Zurich)

by jos.dreesen＠bluewin.ch

I would need access to a floppy based, UCSD-Pascal capable, Apple-II for a couple of months . This is to assist in trying to get diskimages from my ETH Lilith. Anyone in the Zurich, Switzerland area that could help out ? Current Lilith status : Microcode proms saved, Schematics ca. 70% ready, disk access still very temperamental, the Kermit that is present on one of the disks is missing some libraries... The middle mouse button seems to be broken, and is required for editing files.... But the Pacman implementation is great ! Jos Dreesen

16 years, 8 months

Repairing LA50.

by trasz＠FreeBSD.org

I've got an LA50-RB printer I'd like to get to work. After powering on the "Power" light goes on, then, after about two seconds, "Fault" light starts flashing. Printer produces no audible sounds, nothing moves. Any idea where to start? -- If you cut off my head, what would I say? Me and my head, or me and my body?

16 years, 8 months

INS4004D in Pro-Log M900 PROM Programmer

by dkelvey＠hotmail.com

> Date: Mon, 27 Aug 2007 14:43:53 -0600> > Glen Slick wrote:> > If you just need to program 2716's you could pick up a BP Microsystems> > EP-1 for less than $20 off of eBay.> And what if you don't use ebay?> Anyhow the point is fix it -- not toss it out.> All I want programed is 28C16's EEPROMS and I can't find a> low cost burner for that around.> IF COST .LE. $100 THEN CALL SPEND_IT(INCOME)> Ben alias Woodelf> Hi From what I've seen in the spec sheets, one would just use a slightly modified 2716 socket of any machine. A few lines of code should be enough. No special voltages, just special sequences. All easily handled in software. Dwight _________________________________________________________________ Recharge--play some free games. Win cool prizes too! http://club.live.com/home.aspx?icid=CLUB_wlmailtextlink

16 years, 8 months

INS4004D in Pro-Log M900 PROM Programmer

by roger.holmes＠microspot.co.uk

> Date: Mon, 27 Aug 2007 16:53:00 -0600 > From: woodelf <bfranchuk at jetnet.ab.ca> > That is what is frustrating at the moment, the few designs I have seen > on the web is about 3 chips and a zip socket.But alias the only low > cost > one I have seen is from the UK, and the VAT and shipping will kill me. Shipping is indeed a problem, but you are outside the European Union, you should not be charged VAT.

16 years, 8 months

(no subject)

by dave＠mitton.com

> Date: Fri, 24 Aug 2007 21:10:17 +0100 > From: "Rod Smallwood" <RodSmallwood at mail.ediconsulting.co.uk> > Subject: RE: DEC switch handles > > Just a thought .. > Wouldn't the model making fraternity have this kind of problem all the time.? > There must be a way to make a mould using an existing part as the template. > > Rod Ask the right question, and the neurons awake from lurking and respond.... Yes, the keyword you want is "resin casting". Google "DIY resin casting" got me a bunch of good hits. Typically small parts molds (either a actual or built prototype) can be made using RTV rubber and cast using an urethane resin. Search using some of those terms and you should be able to find some good instructions. Here is a commercial kit, the seller is not the lowest cost around, but reliable. http://www.micro-mark.com/ Look at product # 82698 There is a reprint article from Model Railroader on fabricating a duplicate of an old out-of-manufacture Lionel bridge grider. http: //www.micromark.com/html_pages/instructions/82708mrrresinart.pdf Dave. (an MIT TMRCie)

16 years, 8 months

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test-drb August 2007