test-drb

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101090 discussions

FFS: Syquest 44MB internal drive model SQ555

by rmd10000000000＠hotmail.com

Hi Tom, How are you? Do you still have this? Is this a drive that takes a 44mb SyQuest Disk? Thanks, Richie McDermott FFS: Syquest 44MB internal drive model SQ555 Tom Uban uban at <mailto:cctech%40classiccmp.org?Subject=FFS%3A%20Syquest%2044MB%20internal%2 0drive%20model%20SQ555&In-Reply-To=> ubanproductions.com Wed Dec 22 15:21:47 CST 2004 * Previous message: wanted: <http://www.classiccmp.org/pipermail/cctech/2004-December/037013.html> Votrax PSS manual * Next message: mpf <http://www.classiccmp.org/pipermail/cctech/2004-December/037010.html> 1 manual please * Messages sorted by: [ <http://www.classiccmp.org/pipermail/cctech/2004-December/date.html#37014> date ] [ <http://www.classiccmp.org/pipermail/cctech/2004-December/thread.html#37014> thread ] [ <http://www.classiccmp.org/pipermail/cctech/2004-December/subject.html#37014 > subject ] [ <http://www.classiccmp.org/pipermail/cctech/2004-December/author.html#37014> author ] _____ I have a Syquest 44MB internal drive, model SQ555, which came with an enclosure that I picked up. I don't know the status of the drive but it is free for the price of shipping to the first person to claim it... --tom _____ size=2 width="100%" align=center> * Previous message: wanted: <http://www.classiccmp.org/pipermail/cctech/2004-December/037013.html> Votrax PSS manual * Next message: mpf <http://www.classiccmp.org/pipermail/cctech/2004-December/037010.html> 1 manual please * Messages sorted by: [ <http://www.classiccmp.org/pipermail/cctech/2004-December/date.html#37014> date ] [ <http://www.classiccmp.org/pipermail/cctech/2004-December/thread.html#37014> thread ] [ <http://www.classiccmp.org/pipermail/cctech/2004-December/subject.html#37014 > subject ] [ <http://www.classiccmp.org/pipermail/cctech/2004-December/author.html#37014> author ] _____ More <http://dewey.classiccmp.org/mailman/listinfo/cctech> information about the cctech mailing list

17 years, 10 months

HP IIISi: "50 SERVICE"

by lee＠dot.geekdot.com

> Anyone have the manual, or at least have some idea what "50 > SERVICE" means I need to do? "50 SERVICE" means the fuser is not up to temperature. This is usually one of three things, the fuser element, the thernal cutout or the fuser power supply has failed. The element and the cutout can be measured with a VOM and should be < 20 ohms. The easiest way to test the PSU is to swap it with a known good one if you have one. There is a power on timer that takes a long time to discharge so it can take turning the printer off for 20 minutes to clear this fault. Lee.

17 years, 10 months

Looking for 1Mx8 EPROMs (27C080 or 27C801)

by lynchaj＠yahoo.com

Looking for 1Mx8 EPROMs (27C080 or 27C801) Eric Smith eric at brouhaha.com <mailto:cctalk%40classiccmp.org?Subject=Looking%20for%201Mx8%20EPROMs%20%282 7C080%20or%2027C801%29&In-Reply-To=001501c8c898%24e7331d10%24a903a8c0%40andr ewdesktop> Sat Jun 7 13:22:24 CDT 2008 * Previous message: Looking for 1Mx8 EPROMs (27C080 or 27C801) * Next message: (E)PROM, PAL, GAL, CPLD, etc. programming * Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] ________________________________ Andrew wrote: > If anyone can help out or knows a low cost supplier of 1Mx8 EPROMs, I They're not at all hard to find, e.g., http://www.unicornelectronics.com/IC/EPROM.html -----REPLY----- Hi Eric, Thanks for the reply! Yes, finding new 1Mx8 EPROMs is not difficult but that isn't what I am asking about. They only cost about $10 new and are an excellent value, IMO. However, I am trying to find some low cost *used* EPROM parts to help out some homebrew SBC builders. The N8VEM SBC homebrew computer I designed uses the 27C080 or 27C801 for its boot device/block device/ROM drive. I'd like to keep the costs as low as possible and am trying to keep the EPROM at or below $5 each. OTPs are an option but they are less desireable than the reuseable parts with UV windows. As it turns out, most of the people requesting the PCB for building their own homebrew computer are also requesting the EPROM. It rather surprised me as I thought more people would have their own EPROM programmers and erasers. I have a limited quantity of the 1Mx8 EPROMs on hand but not very many. At the rate they are going out with the PCBs, I will exhaust my stock quickly -- long before I run out of PCBs. In retrospect, that is probably bad planning on my part this is an amateur project and I am not a professional businessman. I found a few more 1Mx8 EPROMs on eBay but that doesn't really solve the problem. What I need is the 1Mx8 EPROM equivalent to this website: http://epromman.com/ I have purchased bulk used EPROMs from "Mr. EPROMMAN" before and they are an excellent value. Unfortunately, he doesn't carry the 1Mx8 parts. :-/ Thanks in advance if anyone can help. Andrew Lynch

17 years, 10 months

invading varmints

by reevejd＠mchsi.com

Finally, a classic computer question involving insects. If you're dealing with insects and probably arachnids as well, a small chunk of no-pest strip should rapidly kill them. I'd enclose the machine in a plastic bag to concentrate the fumes. Rural King has it. Cheers, John R. -- I am using the free version of SPAMfighter for private users. It has removed 129 spam emails to date. Paying users do not have this message in their emails. Get the free SPAMfighter here: http://www.spamfighter.com/len

17 years, 10 months

TRS9200BBDED MANUAL (922534)

by raquel.garcia＠psi-corp.com

Would you happen to have a manual for unit# TRS9200BBDED (EECO UNIT#) even a pdf file would work. Thanks, Raquel L. Garcia Electronics Purchasing PSI Repair Services, Inc. raquel.garcia at psi-corp.com <mailto:raquel.garcia at psi-corp.com> 734-853-5222 ph. 734-853-5038 fx.

17 years, 10 months

OT: Low-poer real-audio player

by cclist＠sydex.com

> Date: Mon, 09 Jun 2008 07:55:03 +0100 > From: Gordon JC Pearce > I can recommend the Freecom Musicpal too, especially with the most > recent firmware update (unless there's been one since I updated last > month). I wound up getting an HP E-PC cheap, disconnecting the CD-ROM drive and subsituting a CF card for the hard drive (no swap partition). I can run Linux on it and even use it as a router without drinking a lot of power. While other devices like the Musicpal may be better candidates, the PC box gives me the most flexibility. Cheers, Chuck

17 years, 10 months

IBM XT diagnostic ROM

by amouses＠gmail.com

Andrew et al, For some time I've seen these extremely cheap PC diagnostics cards posted on ebay Search www.ebay.com for pc diagnostic isa and you get something like this http://cgi.ebay.com/PCI-USB-LPT-Analyzer-Diagnostic-POST-Test-Cards-ISA-PC_… How about somebody get the ISA version of such a card and see if it's at all useful. I suppose it might be able to help you fault find a seemingle dead system though I am somewhat suspicious. Regards marcus. -- marcus bennett amouses at gmail.com

17 years, 10 months

OT: Low-poer real-audio player

by cclist＠sydex.com

I know this is off-topic, but I'm looking for suggestions and a solution may involve a "vintage" box. If you feel that discussion of this on-list isn't appropriate, please email me privately. Here's my situation. I like to listen to web-based radio and I transmit an FM signal so that I can listen on any FM radio. It works very well and I'm happy with that aspect. However, the system doing this is an old built-like-a-tank 500MHz P3 Compaq Deskpro box running RedHat somehing-or-the other (it's been so long since I've upgraded it that I don't remember) 24x7. I'd like something that drinks less power. Interface to the web is via 100BaseT copper. Station switching is accomplished via a simple shell script and initiated via telnet. My current thought is that I could pick up something like an HP e-PC and equip it with a CF hard drive. But a 1.7GHz CPU again seems like overkill for a very limited application. Does anyone have any other low-power ideas? Note that most of the streams I listen to are RA, not MP3. Thanks! Chuck

17 years, 10 months

1Mx4 DRAM 20-pin dips

by keithvz＠verizon.net

I'm searching for a source of a DRAM memory IC that would have the following specs: 20-pin DIP DRAM memory chips (16) 1meg x 4-bit dips make up a bank of 8mb. Should be 60-ns Fast Page Mode non-parity An example would be Toshiba TC514400AP-60. Other manufacturers might use the following base part numbers: Fujitsu MB : 814400 Goldstar GM : 71C4400 Hitachi HM : 514400 Hyundai HY : 514400 Micron MT : 4C4001 Mitsubishi M5M: 44400 Any idea where I could find these would be appreciated. I'm even up to pulling the DRAM from some old boards, if I can find someplace that has boards that contain these chips. Maybe an old printer buffer memory card or something. Certain Epson ActionLaser printers contained the correct chips. There's some surface mount versions that won't work, and there's also a 26/20-pin version that won't work. These incorrect dips would have 20-pins, but are laid out in a 26-pin configuration with 10 pins on each side, separated by a small (3-pin) gap on either side. These seem popular, but unfortunately, they won't work! Thanks! Keith

17 years, 10 months

Looking for 1Mx8 EPROMs (27C080 or 27C801)

by cclist＠sydex.com

One can also purchase (very inexpensively) 32 pin DIP-to-PLCC adapters to enable one to use the still-abundant 1 and 2 Mbit Flash chips used on PC motherboards. Many of these things have boot block protection, another big plus if you're worried about inadvertently destroying the contents. The adapter allows them to programmed in your favorite ZIF-equipped programmer, if you don't want to enable in- circuit programming. FWIW, Chuck

17 years, 10 months

powering up older machines - is it safe?

by jfk＠kuenzigbooks.com

Hi all - I'm new to the list, been lurking for a while. By way of introduction, back in the 80s I was a bonified software developer (wrote a mag tape locking device for an early version of UNIX back when there wasn't such a thing, did work in telecom test equipment and speech recognition for years) but these days I'm in the old/rare book business, technical books and all. I like old hardware, though don't have the storage space for much. When I was in high school I took apart a Friden computyper in my parents basement just to see what was in it. Still have the "core memory" board around here somewhere. I've tried to salvage manuals for old computers, component manufacturer technical books, and an IMSAI or two over the years. Still have 20 boxes of old components (everything from transistors, caps, resistors, etc to tubes) in the garage I've accumulated over the years when I'm buying old books >from hobbyists - buried deep enough I don't even remember what's in them. Anyway, a friend asked me to try and sell a DEC Robin for him (he tells me it's a DEC VT180 with a separate drive unit that he tells me was only available to DEC employees), and my question is this: Is it safe to try and plug this machine in and try to power it up? I've seen various discussions about old capacitors dying, etc but I'm not sure if this machine is old enough to worry about. My plan was to try and power it up (my consignor also gave me some software with it, not sure if it's related or not yet), and see if it still ran ok, take some photos for the group (if anyone wants to see it) and my own records, and then try to sell it. It appears to be in good shape, in the original boxes, "monitor" in one box w/keyboard (looks to be a VT180), and a disc drive unit in the other. My consignor said it ran the last time he had it out many years ago. I've always enjoyed and preferred photographs of old machines with their startup screen displayed rather than a dark screen. Seems like they have more life with a live screen. Any pointers appreciated (on or off list) - what to do or check in what order would be great. Its been a long time since I blew up directional capacitors in lab...so long I don't even remember what they're called. Thanks in advance!<grin> -- Sincerely, John Kuenzig, Bookseller Kuenzig Books PO Box 452, Topsfield, MA 01983 978-887-4053 9am-7pm Eastern Standard Time 866-512-3053 tollfree 9am-7pm EST orders at kuenzigbooks.com (orders or inquiries) Important Books in Science, Technology and Speculative Fiction Secure ordering at http://www.kuenzigbooks.com Save time, money and earn other exclusive benefits. Members of: ABAA http://www.abaa.org MARIAB http://www.mariab.org ESA http://www.ephemerasociety.org Buying 18th-21st century books, manuscripts, ephemera, scientific instruments, artifacts, and related material

17 years, 10 months

Looking for 1Mx8 EPROMs (27C080 or 27C801)

by lynchaj＠yahoo.com

* Previous message: Looking for 1Mx8 EPROMs (27C080 or 27C801) * Next message: The Machine That Changed the World: Great Brains * Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] ________________________________ On Sunday 08 June 2008, Andrew Lynch wrote: > During the design, I wrestled with Flash ROM versus EPROM for quite a > bit. > > I went with EPROM since they are unchangeable in circuit and have > larger capacity for the same 32 pin socket. > > My assumption was with cheap and plentiful EPROM programmers (search > for Willem on eBay ~$20) that practically everyone interested would > have one. > > Flash ROM has its advantages but requires more advanced software for > in circuit reprogramming. The software would have to be written too. Flash should actually be easier than an EPROM to program, especially in-circuit, as it's designed to do that. If you're worried about accidental erasure, just throw a switch or jumper on the board to disable the /WE input to the flash. Pat -- Purdue University Research Computing --- http://www.rcac.purdue.edu/ The Computer Refuge --- http://computer-refuge.org ________________________________ -----REPLY----- Hi Pat, Well, in theory you may be right but this SBC has already been designed and manufactured. The PCB exists and is shipping now so it is a bit late for the initial design considerations. I understand the appeal of Flash ROM but the parts are more expensive and many can be corrupted in circuit with errant software. Even with code protection modes, there is no guarantee of non-corruption on Flash ROMs. At some point you'll have to lower the protection if you ever want to write to that part of the chip. In circuit reprogramming ability opens the door for those sorts of bugs to creep in to the code. EPROMs cannot be corrupted in circuit, short of a broken component, AFAIK. Some Flash ROM chips do support code protection but not all. Really, any part you select for this job has its costs and benefits. It all gets down to trade offs. One of my primary goals of the SBC is to keep the overall cost to a minimum while providing something useful. Generally speaking, EPROM is cheaper than Flash ROM and also has larger capacity. The price is requiring external programming and erasing. Incorporating EPROM is also requires less complex circuit and the software is easier to write and debug. There is no chance of "bricking" the SBC due to a bug in the CBIOS code either. At least in this case, I am also more familiar with the technology and I was able to reuse my prototype design almost as is. Not having to write special software was a big plus too. In short, EPROM seemed like a hands down winner. What caught me by surprise was the larger than expected demand for the pre-programmed EPROMs. Even that isn't really much of a problem since if I can't find a source for low cost used parts, I can just buy a tube or so of new ones from Jameco. Brand new, they only cost $6.25 each when you buy 10 or more. I can just raise the price of the EPROM but I would rather keep it as low as possible. Thanks for the help and comments. Please let me know if anyone gets any other ideas. Have a nice day! Andrew Lynch PS, I did some investigating and experimenting with the 29F020 style chips. It turns out making a shim socket for getting them to work is trivial. I have several compatible chips on hand. It still doesn't add in circuit reprogramming but even that would be fairly easy with some cuts and jumpers and appropriate software.

17 years, 10 months

pdp-10

by mross666＠hotmail.com

1. It's in the USA, not the UK. 2. High-res images can be found by clicking on the low-res images at: http://www.corestore.org/DEC2065.htm Mike http://www.corestore.org _________________________________________________________________ Enjoy 5 GB of free, password-protected online storage. http://www.windowslive.com/skydrive/overview.html?ocid=TXT_TAGLM_WL_Refresh…

17 years, 10 months

Source for one-off ICs?

by trixter＠oldskool.org

I'm looking to buy 1 or 2 DS-1216e chips (they're clock chips) but am having trouble finding a reseller/distributor that will sell them in lots of less than 300. Does anyone know of a reseller for ICs that has somewhat reasonable one-off prices? -- Jim Leonard (trixter at oldskool.org) http://www.oldskool.org/ Help our electronic games project: http://www.mobygames.com/ Or check out some trippy MindCandy at http://www.mindcandydvd.com/ A child borne of the home computer wars: http://trixter.wordpress.com/

17 years, 10 months

Looking for 1Mx8 EPROMs (27C080 or 27C801)

by lynchaj＠yahoo.com

* Previous message: Looking for 1Mx8 EPROMs (27C080 or 27C801) * Next message: Looking for 1Mx8 EPROMs (27C080 or 27C801) * Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] ________________________________ Glen wrote: > Digi-Key lists the M27C801-100F1 @ $7.12 each for q >= 10. > IC EPROM 8MBIT UV 100NS 32-FDIP > > That's not too far away from $5 ... Though it's an OTP, so as soon as you need to reprogram it once, you've lost the cost savings. -----REPLY----- Regarding the OTPs, I agree and am looking for the UV eraseable EPROMs. Possibly, 27C4001 chips may work as an alternative and they are being sold by Mr. EPROMMAN. I'll get one soon and test it. I would really like to avoid OTPs as the primary method to update the software on the SBC is to download and/or create a new ROM image. OTPs have their uses and could be a "fall back to known good" chip but the lack of reprogrammability makes them wasteful in my mind. During the design, I wrestled with Flash ROM versus EPROM for quite a bit. I went with EPROM since they are unchangeable in circuit and have larger capacity for the same 32 pin socket. My assumption was with cheap and plentiful EPROM programmers (search for Willem on eBay ~$20) that practically everyone interested would have one. Flash ROM has its advantages but requires more advanced software for in circuit reprogramming. The software would have to be written too. Some Flash ROM chips have "code protect" modes as well which make them more reliable. I am considering some possible modifications to the design using shim sockets to convert to Flash ROM as they are very cheap and readily available. The best design would be flexible and accept either chip but there are differences in pin outs that prevent "drop in" replacements from working. I have already tested a variety of Flash ROM devices with no luck so far. The best solution though, IMO, would be a low cost source of used 27C080/27C801 chips. There has to be someone out there with lots of surplus used 1Mx8 chips laying around. They were common as dirt just a few years ago. Thanks and have a nice day! Andrew Lynch

17 years, 10 months

The Machine That Changed the World: Great Brains

by marvin＠west.net

I just got this in email from a friend, and thought the list might be interested. http://waxy.org/2008/06/the_machine_that_changed_the_world/ The Machine That Changed the World: Great Brains Posted Jun 3, 2008 (Updated Jun 4, 2008) The Machine That Changed the World is the longest, most comprehensive documentary about the history of computing ever produced, but since its release in 1992, it's become virtually extinct. Out of print and never released online, the only remaining copies are VHS tapes floating around school libraries or in the homes of fans who dubbed the original shows when they aired. It's a whirlwind tour of computing before the Web, with brilliant archival footage and interviews with key players ? several of whom passed away since the filming. Jointly produced by WGBH Boston and the BBC, it originally aired in the UK as The Dream Machine before its U.S. premiere in January 1992. Its broadcast was accompanied by a book co-written by the documentary's producer Jon Palfreman. With the help of Simon Willison, Jesse Legg, and (unofficially) the Portland State University library, we've tracked down and digitized all five parts. This week, I'm uploading them, annotating them with Viddler, and posting them here as streaming Flash video as they're finished. Also, the complete set will be available as high-quality MP4 downloads via BitTorrent by Friday. Here's the first of the five-part series, The Machine That Changed the World. Enjoy! Note: Like all the other materials I post here, these videos are completely out-of-print and unavailable commercially, digitized from old VHS recordings. If they ever come back into print, or the copyright holders contact me, I'll take them down immediately.

17 years, 10 months

Looking for 1Mx8 EPROMs (27C080 or 27C801)

by lynchaj＠yahoo.com

Andrew, eBay is usually the place to find used eproms here's one #330229142491 lot of 11pcs @ $47.95 'Buy it now' there's 4 lots left That's about $5 each *after* shipping =Dan [ RFK ] [ Pittsburgh --- http://www2.applegate.org/~ragooman/ ] Andrew Lynch wrote: > Hi, > > I am searching for some used 1Mx8 32 pin DIP UV EPROMs like 27C080 or > 27C801. > > If anyone can help out or knows a low cost supplier of 1Mx8 EPROMs, I would > much appreciate it. > > THANK YOU IN ADVANCE FOR ANY HELP! > > Andrew Lynch > > > > -----REPLY----- Hi Dan, Thanks! Yes, I found those on eBay and bought some. They should be enough so I can finish this round of PCBs without running out of EPROMs. I checked with the helpful people at Mr. EPROMMAN and I think I may be able to substitute a 27C4001 for the 27C801. They are only half the size but they are available used, inexpensive, and in quantity. Thanks and have a nice day! Andrew Lynch

17 years, 10 months

Looking for 1Mx8 EPROMs (27C080 or 27C801)

by lynchaj＠yahoo.com

Looking for 1Mx8 EPROMs (27C080 or 27C801) Al Kossow aek at bitsavers.org <mailto:cctalk%40classiccmp.org?Subject=Looking%20for%201Mx8%20EPROMs%20%282 7C080%20or%2027C801%29&In-Reply-To=> Sat Jun 7 16:15:04 CDT 2008 * Previous message: Looking for 1Mx8 EPROMs (27C080 or 27C801) * Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] ________________________________ > I'd like to keep the costs as low as possible and am trying to keep the > EPROM at or below $5 each. How much of the megabyte of space have you ACTUALLY used? A meg of EPROM seems insane to me for a low-cost SBC. ________________________________ * Previous message: Looking for 1Mx8 EPROMs (27C080 or 27C801) * Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] ________________________________ More information about the cctalk mailing list <http://www.classiccmp.org/mailman/listinfo/cctalk> -----REPLY----- Hi Al, Insane is such a harsh word... :-) I consider it a slight modern adaptation to a Z80 SBC designed in the classic vintage style. Of the 1MB EPROM, the current SBC uses a little over 128K. It includes the boot loader, RAM monitor, CP/M boot image, the standard transient CP/M commands, the VDE full screen editor, BBC basic, and a smattering of small utilities like the RTC, XMODEM5, and start-the-RAM-monitor-from-CP/M. The rest of the EPROM is reserved for user expansion in the various CP/M USER spaces. The SBC really only needs probably 4K or so to boot the RAM monitor but the rest of the ROM is used as CP/M block devices (32K A: and 992K F: drives). There is also a 448K RAM block device for CP/M drive B: for temporary files in addition to the full 64K main memory for the OS and RAM monitor. Memory block devices allow the SBC to have a usable and reliable OS for relatively easy user expansion without the hassle and reliability issues of real disk devices. Real disk drives are supported (IDE and floppy) on a Disk IO board I built on the prototype. I plan to make a PCB for later on. Disks are good things but I made them an option rather than a requirement to keep it simple. Believe me, a 1MB EPROM block device is *MUCH* less expensive than adding even the least expensive floppy drive controller and even IDE. The ROM control circuitry is there regardless of size and the cost difference between a 27C64 and a 27C801 is minimal in the overall cost. The benefits of reliable storage tremendously outweighs the minor extra cost, IMO. Thanks and have a nice day! Andrew Lynch

17 years, 10 months

Looking for 1Mx8 EPROMs (27C080 or 27C801)

by lynchaj＠yahoo.com

Hi, I am searching for some used 1Mx8 32 pin DIP UV EPROMs like 27C080 or 27C801. If anyone can help out or knows a low cost supplier of 1Mx8 EPROMs, I would much appreciate it. THANK YOU IN ADVANCE FOR ANY HELP! Andrew Lynch

17 years, 10 months

Looking for 1Mx8 EPROMs (27C080 or 27C801)

by ajp166＠bellatlantic.net

> >Subject: Re: Looking for 1Mx8 EPROMs (27C080 or 27C801) > From: Al Kossow <aek at bitsavers.org> > Date: Sat, 07 Jun 2008 14:15:04 -0700 > To: classiccmp at classiccmp.org > > > I'd like to keep the costs as low as possible and am trying to keep the > > EPROM at or below $5 each. > >How much of the megabyte of space have you ACTUALLY used? > >A meg of EPROM seems insane to me for a low-cost SBC. > One application is a CP/M romdisk, multiple program loader. Allison

17 years, 10 months

Looking for 1Mx8 EPROMs (27C080 or 27C801)

by aek＠bitsavers.org

> I'd like to keep the costs as low as possible and am trying to keep the > EPROM at or below $5 each. How much of the megabyte of space have you ACTUALLY used? A meg of EPROM seems insane to me for a low-cost SBC.

17 years, 10 months

(E)PROM, PAL, GAL, CPLD, etc. programming

by lynchaj＠yahoo.com

(E)PROM, PAL, GAL, CPLD, etc. programming Seth Morabito sethm <mailto:cctalk%40classiccmp.org?Subject=%28E%29PROM%2C%20PAL%2C%20GAL%2C%20C PLD%2C%20etc.%20programming&In-Reply-To=> at loomcom.com Thu Jun 5 19:33:59 CDT 2008 * Previous message: MicroVax batteries <http://classiccmp.org/pipermail/cctalk/2008-June/259065.html> * Next message: (E)PROM, PAL, GAL, CPLD, etc. <http://classiccmp.org/pipermail/cctalk/2008-June/259026.html> programming * Messages sorted by: [ date ] <http://classiccmp.org/pipermail/cctalk/2008-June/date.html#259024> [ thread ] <http://classiccmp.org/pipermail/cctalk/2008-June/thread.html#259024> [ <http://classiccmp.org/pipermail/cctalk/2008-June/subject.html#259024> subject ] [ author ] <http://classiccmp.org/pipermail/cctalk/2008-June/author.html#259024> _____ Hey folks, I'd like to get some advice on getting a general-purpose (E)PROM burner. I've never burned a PROM in my life, but as I get more into digital design and home-brewing logic, I'm finding myself wishing I had access to a burner. I am a helpless newbie on this front, so perhaps someone can show me the light. I'd ideally like to be able to dump and burn PROMs, EPROMs, and PALs of various flavors. Bonus points would be GAL and CPLD programming capability, but I don't know how common it is to find both of those in the same box. Is it? Or is programmable logic typically handled by a totally different device? Availability is important -- I'd prefer to find one I can buy soon rather than waiting for just the right one to show up on eBay. And yes, just to prove that this is more or less on topic: I have been given a box of early 80s EPROMs I would like to try to get dumps of! Thanks much, -Seth _____ * Previous message: MicroVax batteries <http://classiccmp.org/pipermail/cctalk/2008-June/259065.html> * Next message: (E)PROM, PAL, GAL, CPLD, etc. <http://classiccmp.org/pipermail/cctalk/2008-June/259026.html> programming * Messages sorted by: [ date ] <http://classiccmp.org/pipermail/cctalk/2008-June/date.html#259024> [ thread ] <http://classiccmp.org/pipermail/cctalk/2008-June/thread.html#259024> [ <http://classiccmp.org/pipermail/cctalk/2008-June/subject.html#259024> subject ] [ author ] <http://classiccmp.org/pipermail/cctalk/2008-June/author.html#259024> _____ More information <http://www.classiccmp.org/mailman/listinfo/cctalk> about the cctalk mailing list _____ [apologies in advance for HTML format email but this message contains links] Hi Seth, As you can probably tell from the responses so far your choice in EPROM programmers is a highly personal one. Certainly the Data IO is a nice programmer. I have a Data IO 29B and use it frequently for older EPROMs like 2708s and such. There probably isn't the perfect EPROM programmer that does everything for everybody. I have managed to get several for various needs. For very low cost but limited in that it can only program fairly recent EPROM, Flash, EEPROM, SRAM, etc, I would go with an eBay special Willem programmer. At $20 plus shipping they are hard to beat and are good for the vast bulk of requirements. They do not do GALs, PALs, CPLDs, but do PICs and AVRs. http://search.ebay.com/willem-programmer_W0QQdfspZ32QQfromZR40QQfsooZ1QQfsop Z34QQsbrsrtZd If you need GALs, PALs, CPLDs as well and can spend a little more go with the EasyPro 90B or Top 2007 http://search.ebay.com/search/search.dll?sofocus=bs <http://search.ebay.com/search/search.dll?sofocus=bs&sbrftog=1&from=R40&sati tle=easypro+90B&sacat=-1%26catref%3DC6&sargn=-1%26saslc%3D2&sadis=200&fpos=4 5429&sabfmts=1&ftrt=1&ftrv=1&saprclo=&saprchi=&fsop=34%26fsoo%3D1&coaction=c ompare&copagenum=1&coentrypage=search> &sbrftog=1&from=R40&satitle=easypro+90B&sacat=-1%26catref%3DC6&sargn=-1%26sa slc%3D2&sadis=200&fpos=45429&sabfmts=1&ftrt=1&ftrv=1&saprclo=&saprchi=&fsop= 34%26fsoo%3D1&coaction=compare&copagenum=1&coentrypage=search http://search.ebay.com/top2007_W0QQcatrefZC6QQdfspZ32QQfromZR40QQfsooZ1QQfso pZ34QQftrtZ1QQftrvZ1QQsabfmtsZ1QQsacatZQ2d1QQsbrsrtZd You can shop around for various models online but here is a good place to comparison shop. The prices aren't too bad either and pretty convenient: http://www.mcumall.com/comersus/store/LeftStart.asp?idCategory=27 If all you want to do is get started with EPROM programming and maybe read some old EPROMs, I would just get the Willem and use it until you determine what you really want and need. My guess is the Willem will do practically everything you'll need until you get some specialized requirements like 2708s/1702s/GALs/PALs etc. Thanks and good luck! Andrew Lynch PS, When buying an older EPROM programmer, be sure to check the socket size. Some older programmers only accept up to 28 pin devices. Many newer DIP memories are 32 or 42 pin chips and even larger.

17 years, 10 months

C <-> ASM translation problem

by cclist＠sydex.com

> Date: Thu, 5 Jun 2008 20:02:22 +0200 > From: Oliver Lehmann I don't have any experience with your particular compiler, but from what you say on your web page, it makes me wonder if an additional temporary variable isn't involved. Something like: x = (caddr_t)(((long)uap->linkname)); x &= 0x7F00FFFF; u.u_dirp.l = x; Of course, the intermediate variable would have to be register- resident. Just a guess... Cheers, Chuck

17 years, 10 months

MicroVax batteries

by ian_primus＠yahoo.com

The batteries in my MicroVaxen need to be replaced. A couple of questions: What's the best way to clean up corrosion damage caused by these batteries? With Alkaline batteries, I usually use vinegar (since alkalines leak a base, not acid). What about NI-CD? What types of batteries can these be replaced with? I'm assuming that this is a NI-CD battery pack. I went to Radio Shack expecting to simply find a cordless phone battery that I could use to replace it - the pack appears to be nothing more than three AAA NI-CD cells in series. Unfortunately, the only sort of phone batteries they carry are either too big (AA's) or NIMH. I wouldn't imagine that it would work, but is it possible to use NIMH batteries to replace the original pack? I ended up buying a small pack at Target, it's a small, three cell (half or third AA, it appears), phone battery pack. NI-CD, 400mAh. But, you know, I'd like to know what my options are for the other MicroVaxen... Thanks! -Ian

17 years, 10 months

MicroVax batteries

by cclist＠sydex.com

Time again for a stupid question. Why replace the original? I hate the idea of batteries inside equipment where the electrolyte goo can leak all over sensitive components. If I had your MicroVAX, I'd get a bunch of primary cells in a battery holder and place them outside of the case, so the goo will leak out onto the floor. A diode in series with the battery pack should disable the charging circuit and drop the pack's voltage to near-optimal. (3x1.2 NiCD = 3.6v; 3x1.5 primary = 4.5v - 0.7v for the series diode = 3.8v; pretty close). If the battery's function is to keep the clock and some RAM alive, 3 "D" cells will probably last a year or two. Make them Lithium-iron cells and you'll probably get 10 years of service. Cheers, Chuck

17 years, 10 months

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