test-drb

test-drb@ccmp.vtda.org

101090 discussions

by kelly＠catcorner.org

> Amongst some TRS-80 Model 16 parts I picked up this past weekend is a > board I can't identify. It's labeled as a "Tandy 16B Adapter", PCA > 00717000 REV 0. It doesn't seem to have much on it, a few TTL chips and > a 50 pin connector. > > I put a pic up at: http://yahozna.dyndns.org/scratch/IMG_0165.JPG Looks to be the adapter for the "cartridge drive" AKA the bernoulli drive. I have a couple of the boards, but no drives. I'm trying to get my hands on one now. Kelly

17 years, 9 months

TRS-80 M16b board identification...

by derschjo＠msu.edu

Amongst some TRS-80 Model 16 parts I picked up this past weekend is a board I can't identify. It's labeled as a "Tandy 16B Adapter", PCA 00717000 REV 0. It doesn't seem to have much on it, a few TTL chips and a 50 pin connector. I put a pic up at: http://yahozna.dyndns.org/scratch/IMG_0165.JPG Anyone know what it is? Thanks, Josh

17 years, 9 months

5.25" MO disks to get rid of right now

by dgriffi＠cs.csubak.edu

I have six LMR-1300 and seven LM-D501W 5.25" magneto-optical disks that I want to be rid of ASAP. They're yours for cost of shipping. -- 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?

17 years, 9 months

C++ (was Re: Further PERQ Emulator progress

by cclist＠sydex.com

It used to be a genuine item of concern in X3J3 (FORTRAN), and, for all I know, other X3 standards committees, whether the role of the committee was to certify and clarify existing practice or to extend the language. Fortunately, a lot of people back in the days of F77 remembered what a nightmare PL/I turned out to be. By the time of F90 (was supposed to have been F88), that had been largely forgotten. That awful word "deprecated" seems to spell doom for a language, as in "EXAMINE is deprecated; we're going to give you a new verb, INSPECT, with about fifty jillion new options that you'll never remember anyway." COBOL was never the same after that. It always seemed to me that the C++ people never even had the discussion. For what it's worth, I do use C++ for some projects, but it's generally at the level that C++ was when C++ was pretty much a standalone preprocessor for a C compiler. Cheers, Chuck

17 years, 9 months

ISO Interleaf for SunOS

by aek＠bitsavers.org

CHM has a large collection of HP 1000 documents on tape in Interleaf format It would be nice to convert these to Postscript/PDF. Does someone have an old copy of Interleaf that would run on a Sun box (like a SparcStation)?

17 years, 9 months

Commodore 64 Power Supply

by sethm＠loomcom.com

I'm sure most everyone who has ever used a C64 is aware of just how phenomenally bad the Commodore power supply is. I have only one C64, but both of my spare Commodore power supplies have now failed, taking a few 4164 RAM chips with them (thankfully, I have replacements!). Does anyone know of a commercially available replacement power supply, before I go off and build one? A linear supply would be trivial to design, but I've never done a switching power supply, which I suppose would be greatly preferable. The trick with the C64 is that it requires both 9V AC and +5V DC. (I've considered frankensteining together 9V AC and +5V DC wall-wart adapters onto the same DIN-7 cable, but it just feels so very very wrong). I'd love to hear from other Commie fans who've solved the power problem. -Seth

17 years, 9 months

FS: used 5.25" MO media

by dgriffi＠cs.csubak.edu

I have seven Panasonic LM-D501W disks (940 MB) and six LMR1300 (1.3 GB, MDI and Verbatim) magneto-optical disks available for $5 each plus shipping. They're used, but seem okay. -- 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?

17 years, 9 months

asr33 on ebay

by brian＠quarterbyte.com

Hi folks, FYI there's an ASR-33 on ebay with no bids, ending today, item 220251461521 Looks like it's in good cosmetic condition but seller notes it has an electrical problem.

17 years, 9 months

Further PERQ Emulator progress (and a download!)

by derschjo＠msu.edu

Thought some of you PERQ fanatics out there might be interested in an update... I've had some time to work on projects the past few days and so I picked up my poor, neglected PERQ emulator and brushed it off. And this is the result: http://yahozna.dyndns.org/computers/perq/emulator/perq-5th.png http://yahozna.dyndns.org/computers/perq/emulator/perq-chess.png As you can see the emulator is now capable of booting POS from an image of my real PERQ's hard drive! I had to hack in a few things I'm not proud of -- most notably, a simulation of the RASTEROP QCode instruction since emulating the real thing has proven to be a nightmare -- but I plan on doing a proper emulation of the stuff I've hacked around as I work out more of the hardware details... If you want to try it out and see the glory of POS (and who doesn't, really?) you can download version 0.1 at: http://yahozna.dyndns.org/computers/perq/emulator/perqemu0.1.zip Includes all you need to get going. You'll need a Windows machine with .NET Framework 2.0. (Yes, I hear the jeering from the peanut gallery. Sorry I didn't write this for your OS. If you want to help with a Mono port when I get this thing more finished, let me know :)). Be sure to read the readme.txt file as it covers some work-arounds for some annoying emulation issues. Well, back to the grindstone. Need to implement GPIB tablet, disk writes, hardware cursors, serial, ethernet, video timing, real RasterOp emulation, 16K CPU support... and whatever else I've forgotten... - Josh

17 years, 9 months

terminal servers

by dm561＠torfree.net

If you're happy with RS-232 only (but with HS and baud rate conversion) then I've got some 16-port NetCommanders for ya. Also some modems and statmux concentrators if they're in different cities ;-) And I could probably also find a nice model 500 phone (and maybe even the DataPhone version) and an acoustic coupler for that other project ;-) Yeah, I thought it was neat first time I saw it, but a little pricey... Couldn't resist defying your sig BTW... mike *********************************************************************************** Original Message: Date: Fri, 4 Jul 2008 00:59:46 -0700 (PDT) From: David Griffith <dgriffi at cs.csubak.edu> Subject: terminal servers I'm considering a terminal server for playing with multiple computers using multiple terminals. Can someone recommend something inexpensive and/or used? The idea is that I'd sit at one of several terminals and select which host I want to talk to. While mentally rolling this around this afternoon, I found my way to this perverse fantasy -- going "online" in public with a Sparkfun portable rotary phone[1] and a portable printing terminal (say, a Tandy PT-210). [1] http://www.sparkfun.com/commerce/product_info.php?products_id=287 -- 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?

17 years, 9 months

It's funny what some people think things are worth

by christian_liendo＠yahoo.com

I check craigslist and honestly it's getting to be a waste but I do get to see what some insane people think their stuff is worth ======================================================== http://newyork.craigslist.org/lgi/sys/741485335.html COMMODORE 64 PORTABLE COMPUTER - $1000 (Garden City) Reply to: sale-741485335 at craigslist.org Date: 2008-07-03, 12:08PM EDT This is a real collectors items, it works perfectly and comes with a few cartridges and floppy disk games. There was a time when this was the second portable computer on the market. Just plug it into electric and off you go for hours and house of fun. ALL ORIGINAL. Serious Inquiries Only. $1,000.00 OR Best Offer!!! Thanks. * Location: Garden City * it's NOT ok to contact this poster with services or other commercial interests PostingID: 741485335

17 years, 9 months

DECTalk Express on Ebay

by silent700＠gmail.com

Not mine, but I recall a few folks interested in one here a while back. This one is an exception in that it's up for a non-crazy price: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=200236310450

17 years, 9 months

making C64 power supplies

by dgriffi＠cs.csubak.edu

In case anyone's interested, there is quite a bit of material on building replacement C64 power supplies at http://www.midibox.org/. -- 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?

17 years, 9 months

terminal servers

by dgriffi＠cs.csubak.edu

I'm considering a terminal server for playing with multiple computers using multiple terminals. Can someone recommend something inexpensive and/or used? The idea is that I'd sit at one of several terminals and select which host I want to talk to. While mentally rolling this around this afternoon, I found my way to this perverse fantasy -- going "online" in public with a Sparkfun portable rotary phone[1] and a portable printing terminal (say, a Tandy PT-210). [1] http://www.sparkfun.com/commerce/product_info.php?products_id=287 -- 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?

17 years, 9 months

Free (plus shipping) Sun Ultra5

by alanp＠snowmoose.com

This was a rescue. I work for Sun and generally love the hardware. However, the exception is the attempts to make SPARC boxes as inexpensive as PC by using PC-like components and boxes (i.e., Ultra 5/10). However, I saw a Sun keyboard and system stuffed behind some PCs at a rummage sale and complained, so the seller asked if I wanted the system for free. As noted, it is an Ultra 5 with a 366MHz (I think) UltraSPARC IIi processor and 256M of memory. It also has a 3.5" floppy, but I don't have any working floppy disks left, so I can't confirm that it works. The system had a non-original 52x CD drive and non-original HDD. The seller had tried to install Linux, but it would not boot the CD and the system would try and boot from the HDD and hang (such that it would respond to L1-A). I replaced the HDD with a 120G that I had lying around. I used another CD drive to install Solaris (I work in the Solaris kernel group, so what else am I going to install?). Then I figured out what was wrong with the CD drive that the system was given to me with. So, now, it has a 52x CD-ROM and a 120G IDE HDD. The system seems to work fine. It has Solaris 10 (update 5) installed now, but it is a little underpowered to be running that. Included with the system is a Sun 5c keyboard. I just want money to cover shipping it. Or a SPARCstation IPX (I collect the Sun shoebox systems) in trade. Located in the Seattle area. alan

17 years, 9 months

Connecting IBM GXT550P to SGI monitor.

by trasz＠FreeBSD.org

Is there any way to connect 13W3 output of GXP550P (graphics card in RS/6000 p43) to 13W3 SGI monitor (GDM-20E21)? In order to connect SPARCstation I had to make a little modification of the SS2 to make it generate sync-on-green signal. Will the same modification work with IBM? -- If you cut off my head, what would I say? Me and my head, or me and my body?

17 years, 9 months

Heathkit H-11

by dgriffi＠cs.csubak.edu

Just in case anyone's interested, someone's selling a Heathkit H-11 on Ebay (#380042473453). Looking at the card cage of the thing, it seems that Heathkit simply cloned some DEC boards. What's actually going on? -- 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?

17 years, 9 months

Using an ICL7660 to feed -5VDC to 4116 DRAMs?

by ethan.dicks＠usap.gov

Hi, all, I'm in the middle of getting two bare PET boards working, one static, one dynamic. I don't have great honking transformers lying around, so the easiest way to power them is going to be a bench-top DC supply. One thing that makes this a little easier is that I don't need to worry about cassette motor power in this configuration - no tape drives and no tapes. The static PET is easy - it has a few TO-220 7805s on it (which were removed to get the very tall heat sinks off for easier packing and shipping). I am not even sure I need +12VDC for that one - I don't think I do - just +5VDC at a few amps (also made easier because it came with no ROMs and no SRAMs, so I'm using one of Nicholas Welte's ROM/RAM boards that sits in the CPU socket). The dynamic PET, since it has soldered-in DRAMs, is a bit more complicated. Unless I care to remove the DRAM and fit another ROM/RAM board for the SRAM or adapt a 62256 in some other way, I need +12V and -5V for Vdd and Vbb on the 4116 chips. My question (after all this background info) is... does anyone have enough knowledge of the ICL7660 chip to give an opinion on how well it would work for supplying -5VDC? Looking at datasheets, the max draw I can find on Intel uP416s is 200uA @ -5VDC (along with all its other needs). It looks like the ICL7660 will provide up to 10mA @ -5VDC, but at some higher amount of inefficiency than at lower draws. 16x0.200 is 3.2mA, well under the max draw of the ICL7660, so I think I'm OK, but I wanted to ask other folks about this in case I'm overlooking some important detail. I do have a real C= keyboard that made it before the last plane, and I plan to build either a 74LS86 or 4066-based video adapter to drive a standard monochrome security monitor (that I saved from being discarded two years ago), so keyboard and video are taken care of (plus I have a "C=Key" board that I probably have time to assemble to try using a modern keyboard with). For a base PET, besides video and keyboard, the only other issue is power, thus my question. If the DRAM were socketed, I'd probably just pull it and use a 62256 in the ROM/RAM board and be done with it, but it might just be easier to feed this board +5V and +12V and synthesize the -5V, unless it turns out that I have a bad DRAM chip - then it's time to yank them like a bad tooth (though I _think_ I know where I can find a few 4116 chips on a shelf here if it comes down to just one or two chips). If I were home, it would be easy - I'd pull out a board from one of my PETs, drop these boards in there at least for testing, then see about mounting them in a box of some sort. Now, at least, the only C= stuff I have are these boards and a few loose parts (like 65C02s and 65C22s). One memory that's filtering up to the surface is that ISTR some order-of-DC-powerup requirement for 4116s, like don't apply -5V first or remove it last or some such. I plan to power the ICL7660 off of the +5V rail, but if there is a very specific order that really matters, I might consider running it off the +12V rail (with a 78L05 in-between) instead. Thanks for any input or observations on the ICL7660 and/or 4116s. -ethan -- Ethan Dicks, A-333-S Current South Pole Weather at 2-Jul-2008 at 08:40 Z South Pole Station PSC 468 Box 400 Temp -83.7 F (-64.3 C) Windchill -114.0 F (-81.1 C) APO AP 96598 Wind 6.1 kts Grid 58 Barometer 678.1 mb (10700 ft) Ethan.Dicks at usap.gov http://penguincentral.com/penguincentral.html

17 years, 9 months

Vinegar and acetic acid and stop bath

by tshoppa＠wmata.com

Jochen writes: > Well. Actually acetic acid is the acid in vinegar. Most likely this > stuff is just pure acetic acid without any "flavor". > > Remember: If you are going to dilute concentrated acid > _allways_ pour the acid into water. Never do it the other way around. Another tip from the school of hard knocks: never sniff glacial acetic acid to see what it smells like :-). Rather pure acetic acid of varying concentrations is sold in photography supply stores as stop bath or a hardener add-in for fixer. Certainly pure enough for PC cleanup followed by a wash. You want a concentration way way less than "glacial" (99.5% acetic acid) but much more concentrated than the typical percent or two used in stop bath working solutions. Get it with the indicator in it (most common form for photography) and you'll know that you're done washing/rinsing when it stops turning purple. Tim.

17 years, 9 months

OT: Microdrive reliability

by tonym＠compusource.net

I use the IBM one's, and I love 'em. Tony -----Original Message----- From: Chuck Guzis cclist at sydex.com Sent 7/2/2008 11:13:00 PM To: cctalk at classiccmp.org Subject: OT: Microdrive reliability Does anyone have any extensive experience with CF Microdrive disks-- in particular, the ST1 models? On everyone's least-favorite auction site, I'm seeing tons of refurbs for sale, which makes me wonder if the things hold up at all... Cheers, Chuck

17 years, 9 months

OT: Microdrive reliability

by cclist＠sydex.com

Does anyone have any extensive experience with CF Microdrive disks-- in particular, the ST1 models? On everyone's least-favorite auction site, I'm seeing tons of refurbs for sale, which makes me wonder if the things hold up at all... Cheers, Chuck

17 years, 9 months

NeXT Computer Prototype (Seattle)

by michaelgreen42＠comcast.net

I've got a full NeXT slab setup with monitor/keyboard/mouse. It's a basic slab the neat thing is it was a prototype. I compared it once to my other slab and the lettering/logo was a bit different and this one has prototype printed on it. I should even have the original power cord here somewhere and a short stack of original software and developer stuff (magazines, etc). Taking offers, I'd prefer to deal local and I'm not above trades but I mostly need the cash.

17 years, 9 months

Microdrive reliability

by cclist＠sydex.com

On 2 Jul 2008 at 22:52, cctalk-request at classiccmp.org wrote: > Date: Wed, 2 Jul 2008 23:19:42 -0400 > From: "Evan Koblentz" > I don't know what you mean by "ST1". But I had an IBM 340MB CF > Microdrive when they were brand new. It still works. The Seagate line are all labeled "ST1 Drive". On closer inspection, it looks as if a bunch of Chinese merchants are trying to use refurb units to sell their USB-to-CF adapters. Best to stick with a US vendor, methinks. I'm working on a project that would normally take a standard (i.e. flash) CF card, but I'm debugging code and I'd like to use something that was a little more tolerant of repeated writing. Cheers, Chuck

17 years, 9 months

*48*? pin Cinch connector? (HP 5060-8339?)

by ethan.dicks＠usap.gov

Hi, All, I was going through a box of old stuff and ran across something I've ever seen before - a 48-pin 0.156" Cinch connector w/cable hood. From my Commodore days, I've seen lots of 6 and 12 and 44-pin connectors, but not 48. One telling thing is in fine print on the documentation is the legend "HP Part No 5060-8339". It suggests to me that it might be useful for something in the HP1000 or HP2000 era, if I remember anything about the innards. So, Jay, or other HP fans... does this sound like a familiar connector? -ethan -- Ethan Dicks, A-333-S Current South Pole Weather at 2-Jul-2008 at 15:49 Z South Pole Station PSC 468 Box 400 Temp -75.6 F (-59.8 C) Windchill -109.7 F (-78.7 C) APO AP 96598 Wind 8.7 kts Grid 39 Barometer 680.5 mb (10609 ft) Ethan.Dicks at usap.gov http://penguincentral.com/penguincentral.html

17 years, 9 months

Colorado Memory Systems Jumperless Tape Controller

by cclist＠sydex.com

> Date: Wed, 2 Jul 2008 06:57:09 -0700 > From: "Glen Slick" > The Colorado Memory Systems Jumperless Tape Controller 026-328 PCB has > a copyright date of 1990, which predates the ISAPNP specification by 4 > years so it must use a proprietary configuration method. Went back through my notes--it's not the FC-10 or FC-20 from Colorado that's ISA PNP--it's the Exabyte "Floppy Tape Accelerator", PCB 317235-000 that's the PNP one. Circa 1996, using an 82078. Unlike the Colorado, there's no external drive connector. There are also empty pads for what I suspect might be a data compression processor chip. While both the Exabyte and Colorado 2Mb accelerator cards are nominally 16-bit ISA, the Exabyte uses only the 16-bit additional IRQ lines, while the Colorado uses both the 16-bit data and DMA lines in addition to the extra IRQs. Both cards use 48MHz XCOs. The brief user documentation for both state that they can be used in 8-bit slots; but the Colorado specifies that data rates up to 1Mb/sec are supported in 8-bit mode. For what it's worth... Cheers, Chuck

17 years, 9 months

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