test-drb

test-drb@ccmp.vtda.org

101090 discussions

by jhfinepw4z＠compsys.to

Does anyone have any of these Qbus boards that I can buy? They have a TOY that has a window of 100 years. Sincerely yours, Jerome Fine -- If you attempted to send a reply and the original e-mail address has been discontinued due a high volume of junk e-mail, then the semi-permanent e-mail address can be obtained by replacing the four characters preceding the 'at' with the four digits of the current year.

23 years, 4 months

Wanted: RA81/RA82 Disk Platter

by classiccmp＠crash.com

> I've got one, but it's occupying a place of honor in my collection. > The rest are sitting in my RA-82, which I'm not about to take apart. > These things are hard to come by, [...] About twelve years ago a friend and I were poking around MITs Surplus Property Office. Amongst all the cool "junque" was a pair of RP06 drives and some disk packs. With apologies now to the poor sods wanting an RP06 to hook up to their KS10 or something, I bought one of the disk packs for $5 or something and took it back to the office. I think I was able to deconstruct the whole thing with just hand tools. Resulted in a nice supply of 14" platters for gifts and wall art. In fact just yesterday I was using one of those platters to explain to someone what went on inside the Seagate ST-4051 she was holding, and to show the progression of storage technology... If you really needed a 14" platter for display, look around for a bad RL01/02 disk pack, there's one platter in each pack. Much easier than trying to bust open an HDA... --Steve.

23 years, 4 months

Floating Point EPU for Z8000

by dwightk.elvey＠amd.com

Hi All Does anyone have any of the software information on the Z8000 Floating Point EPU? The CP/M-8000 that I've been working on uses an emulated EPU ( extended processing unit ). It also has code to run with a real EPU. This is all fine and dandy except I have no information on what is needed >from a software point of view. I need a model of what the real EPU does. The assembler I have includes the fp instructions but the docs don't mention how they are used. I suppose I could look to see how the C compiler uses them and look at the emulation code but it would be a lot easier with a users manual. Heck, I'm not even sure they actually made the part. Thanks Dwight

23 years, 4 months

Value of classic computers

by mikeford＠socal.rr.com

>I _very recently_ had the unfortunate experience in having to deal with a >"collector" who seems to fit your description of the second group. I >invited the "collector" along on a rescue of a fair number of systems, >with a prior understanding that I'd get first pick, but he showed up >unannounced (didn't call ahead) and early (he got there before I had I used to go to a scrap yard where a good half dozen people would be lined up waiting for the gate to open, and people would literally run to the back to see the pallets of new stuff and stake out the stuff they wanted. Personality flaws were often revealed. I'm not shy, when I take somebody to a source of goodies, I lay out ground rules, and if they aren't accepted and followed, they don't get access anymore if I can manage it. OTOH this is my hobby, and I recognize for many people this is what puts food on the table and pays the rent. OTOOH I know a couple guys who absolutely refuse to reveal any sources of any kind, AND who often make hardline arrangements with all their sources, ie I accidently find a place on my own, but when I make an offer for some stuff I find out all deals get run past the person I know. I so detest this practice that I do try not to emulate it.

23 years, 4 months

Apple /// help needed

by tiziano.garuti＠tin.it

Hi to everybody. I am in trouble with my beatiful Apple ///, the internal floppy drive is dead. I think that this is a mechanical problem, but I am not sure. Is there a test to check the hardware of the drive ? Another problem is with the Profile drive. I can get the files list via System utilities, but at the end of the list, I get a message like: "Warning: structure directory corrupted". Is there a way to fix this problem? Booting from Business Basic, the "catalog .profile" command is show in a window of 3 or 4 chr width! Why? Perhaps is the same problem with the corrupted directory. Any help will be apreciated :-) Bye Tiziano

23 years, 4 months

Wanted: RA81/RA82 Disk Platter

by xds_sigma7＠hotmail.com

I've opened bad ones with water pump pliers, just firmly grip the weirdo bolts and apply mucho force, and they turn. BTW the screws/bolts/whatever they are appear to be copper... And no, I don't have any platters, I took em to the scrapyard a while ago. Will J _________________________________________________________________ The new MSN 8: smart spam protection and 2 months FREE* http://join.msn.com/?page=features/junkmail

23 years, 4 months

SOL-20 / eBay prices

by glenslick＠hotmail.com

What does PT / non-PT mean in this context? >From: Benedict Bridgewater <benb(a)Basit.COM> >Reply-To: cctalk(a)classiccmp.org >To: cctalk(a)classiccmp.org >Subject: SOL-20 / eBay prices >Date: Mon, 18 Nov 2002 13:24:41 -0500 (EST) > >Actually there's two SOL's currently on eBay. > >The 2nd one is currently "only" $500 or so: > >http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2071406461 > >The difference being that it has no documentation (which I suspect accounts >for >the price difference), and also it only has a single card in it - a non-PT >64K >memory card (I asked the seller if it was PT or not). > >In recent history SOL's have sold for anywhere from $490 to $2500! > >Documentation also seems to be what has so far driven this Altair to $4K: > >http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2072033128 > >Ben _________________________________________________________________ Help STOP SPAM with the new MSN 8 and get 2 months FREE* http://join.msn.com/?page=features/junkmail

23 years, 4 months

Dying VaxStation 4000 VLC - help?

by mtapley＠swri.edu

On disassembly: Toth wrote: >First you'll want to remove lower portion of the plastic shell. There are >5 screws on the bottom of the unit, and two clips on the front edge. Figured out how to release those. Stuff a flat-head screwdriver blade in >from the bottom side, so it slides between the plastic clip and the metal tab it locks over. That way it's pretty easy to lever the plastic *only* far enough to disengage. >Once the graphics board is out, there are 3 more phillips screws at the >back edge of the mainboard. The plastic clips pull up to release, but with >the bottom shell off, you can use something to push them up from the >underside. That works. I used the point of needle-nosed pliers as a pin-driver (set in place, hold the handles, use the other hand to hammer on the one holding the pliers). Once the pins were driven mostly out, the whole clip could be wriggled out with not too much trouble. I still hate those clips. What do they do that a screw and lockwasher wouldn't do better? Big help! Thanks! I had the motherboard out in my hands last night, so I'm ready to go to work desoldering either the comparator or the resistors. Anyone have any educated guesses which one to try first? - Mark

23 years, 4 months

PDP 11/45 available in the Chicago area

by uban＠ubanproductions.com

Hi All, A dealer who usually sells on ebay as RELCOMSER has just gotten an 11/45 in and has offered it to me and a couple of others before putting it up on ebay. He says that he wants $1000 or more for it, but in todays economy, who knows. I do not have any interest in this and would bargain with him for it myself, but my collection already includes an 11/45 and my wife would kill me. Here are details: His name et al: Patrick Lind, Reliable Computer Services Inc., 815-838-0134 His email: RELCOMSER(a)aol.com He is in the Chicago area (Lockport, IL) The specifics: One H960 with 11/45 including the following boards: M787, M8114, All M81?? so 15,12,13,00,01,02,03,04,05,06,08,07,09. M7800, M792-YD, M7800 Memory by Digital Pathways Inc. RVM 128K bds -2- boards. Also -1- RL02 in the same cabinet. Had -2- power supplies. Second H960 with a BAll-K & RL02 NOTE! The front panel has 6 of the plastic switch paddles broken off due to careless moving. He has also plugged it in, but says that he has no way of testing it. I know another guy who has a number of 11/70 front panels, some of which are only useful for parts, so these can be replaced. He made this offer to me, so I assume it applies to others: "We will sell one or both of the H960 cabinets. One has the 11/45 & RL02 with RL02K-DC pak One has a BAll-K & RL02 There are -2- H742-A power suplies with H744, H745, H7441regulators. We will supply -1- each of these regulators as good spares. Because of the age of this we are selling it AS IS, No Warranty. " He sent me some pics, which I will be happy to forward to anyone who is interested, or you can just send him some email. Again. I have no vested interest in this deal and I wish that I had the time, room, and money to pick it up myself. The 11/45 is one of my favorite machines. --tom

23 years, 4 months

Looking for TRS-80 Models I to IV (including spares & accessories)

by glyncoedcompschool＠btinternet.com

Hi I live in the UK and am looking for TRS-80 models I to IV (including spares and accessories). If you're fed up of Zork and want some extra cash then email me with details of what you have, the condition it's in, the price you are looking for and where you live. I would prefer UK based to save on shipping costs but will consider anywhere. Regards John glyncoedcompschool(a)btinternet.com

23 years, 4 months

Dying VaxStation 4000 VLC - help?

by mtapley＠swri.edu

Tothwolf asks: >Are the two fans on the side of the power supply running properly? Both still seem to be. However, most of the tests I'm talking about are run with the lid off, and a small floor fan set up to blow over the mainboard (in the same direction as the small cooling fans). I think the airflow rate >from this is much higher than the cooling fans would generate, but may not be in the right areas. >What type of hard drive do you have in the system? 1-Gig RZ26L. >Your mainboard may have a bad solder joint somewhere near the comparator, >which would explain the thermal issue. That tends to be the worst type of >problem to pinpoint too. It would, but unless the comparator or one of the voltage-divider resistors is intermittent, I'm at a loss to explain the varying voltage on the comparator input. I have physically shoved back and forth on all 3 components while it was running, no effect. Also I can't *see* any bad solder joint, but then I can barely see the two resistors anyway. >First you'll want to remove lower portion of the plastic shell. There are >5 screws on the bottom of the unit, 5 holes, only two screws left in mine. I should probably get some more screws, when I get everything put back together. >and two clips on the front edge. I see them. The plastic has to deform a log way before it'll release, but I'll try it tonight. >Next you'll need to remove the graphics board, Yeah, that is tricky. Done it a couple times during earlier testing. The problem first appeared when I was first using the graphics board, so I blamed it. But I think it's working OK. At least for the moment, I'm doing all the testing with a VT320 on the MMJ console port, so I have to connect/disconnect less stuff when taking things apart. >Once the graphics board is out, there are 3 more phillips screws at the >back edge of the mainboard. The plastic clips pull up to release, but with >the bottom shell off, you can use something to push them up from the >underside. Ok, that's a big help. If I can get the shell off I'll try poking them out. >Certainly make sure they are discharged before you remove them, if you >decide to replace them after all ;) Ok. Short through a resistor for a minute or two? But I'm thinking right now the comparator is the first target for replace, followed by the SMD resistors if that doesn't do it. - Mark

23 years, 4 months

Dying VaxStation 4000 VLC - help?

by mtapley＠swri.edu

>From: ard(a)p850ug1.demon.co.uk (Tony Duell) >I rarely bet except on certainties :-) Yeah, me too. As you probably noted... >>> Now *I'll* bet - Tony wants to know what the comparator *inputs* are >>> connected to. ... >> >>I don;t think it's for overvoltage protection. I think this is where the >>PowerOK signal comes from. And it's triggering at the wrong time. So >>either the comparator is defective or there's a problem with the passive >>components areund it, or there's a PSU fault. >> >>How hard is it to reverse-engineer the schematic of the components around >>this comparator? Can't be _that_ complicated... Yup. a sure bet. :-) Complicated, probably not. Hard, yes. They are all surface-mount and near microscopic. For which reason, all numbers and letters quoted below may be wrong. Here's what I think I found: Comparator INV Input B and Input B connect to ground (zero Ohms to chassis). Comparator INV Input A connects to the middle pin (which points left) of a 3-pin device marked "88W". I couldn't find that the upper right pin connected to anything. The lower right pin connected to ground. That input stayed very steady at about 3.4 V. Comparator Input A connects to an orange device marked "6192" and a black device marked "1152". Both are 2-terminal surface-mount rectangles. The other end of the 6192 connects to ground. The other end of the 1152 connects to +5 (Red wire). That input *varies substantially and irregularly* It's at 4.2V and reasonably steady when the computer is running. It's at 2.9V, or wavering in between when the computer is hung. There may be *lots* of connections I missed. "Wavering" is what I see my needle do - for all I know, the voltage may be popping rapidly between the two values, with varying duty cycle. Here's what I think may be happening: 6192 and 1152 are voltage-dividing the +5V supply down to some intermediate value for the comparator. But either the resistors are flaky (do resistors *do* that?) or the comparator is intermittently drawing current, and throwing off the voltage-divider. Good so far? Any way to test those theories with my analog VOM? Should I order a new LM193 comparator chip instead of a pile of capacitors for my first soldering attempt on this machine? If I *do* need to pull the comparator, I'll need to take the mainboard out of the chassis. That'll mean removing 4 extremely nasty plastic rivet things. How do those suckers come out in such a way as to leave them intact? I wrestled with one for a while and got nowhere. >It can't do any harm provided the new capacitors are good, and you get >them the right way round (they are, of course, polarised.) I didn't make it to the electronics shop today - Kids' soccer game and wife's Newtonsday (sic?) shopping interfered. She promised to go for me Monday if I wanted. I explained to her what a "capacitor" is so that she could breeze in, look knowledgeable, and say "I'd like replacements for all the electrolytic capacitors on this board." She practiced it three or four times so she wouldn't stumble over "electrolytic capacitors". I also pointed at them, just for good measure. All that notwithstanding, the capacitors may get due process after all. - Mark

23 years, 4 months

Giving Y'all first dibs....

by geoffr＠zipcon.net

I have a still shrink wrapped Windows 3.00 on 3.5" 720K disks box. Any interest?

23 years, 4 months

Good haul

by xds_sigma7＠hotmail.com

Yesterday I went by the scrapyard, and found an HP 9825B, 9825T, and 3 HP 86s... Asked what they wanted for them, and they told me "oh we wouldn't charge you for those"... WOOHOO! But I need case parts and manuals and keycaps, plus none of them have interface cards in them.. But the 9825T, which is all I have powered up so far, WORKS! Will J _________________________________________________________________ Add photos to your e-mail with MSN 8. Get 2 months FREE*. http://join.msn.com/?page=features/featuredemail

23 years, 4 months

Dying VaxStation 4000 VLC - help?

by mtapley＠swri.edu

All, Just catching up on the digest. I think next time I beg for advice I'll take digest mode *off* first. The delay is frustrating. Tony was way ahead of me last night, but I didn't get the benefit of his advice until this morning. Tony D. said: >I will bet that >Red = +5V >Black = Gnd >Orange = +12V >Blue = -12V... You'd win, as far as I can tell with my meter, with the minor variations I've noted. >> Blue is one wire, and goes to appx. 12 V. when the system is on. > >I would think the last one is actually -12V ? Correct, typo on my part. >More intersting would be to >use a 'scope to look for noise (particularly spikes at the PSU switching >frequency). Such spikes can make a supply rail look to be too high on >some meters. Yeah. Sigh. What's a likely frequency for the PSU switching? Is my (primitive analog) VOM likely to yield any useful info if I set it to the "AC Voltage" ranges? >> M9124 >> LM393N >> QST > >Aha. A dual voltage comparator. This could be used to check if power is >OK, and to generate the reset signal as appropriate. I don't know the causality yet (failure causes comparator to switch, or comparator switching causes failure), but the comparator (at least output A) does switch when the failure appears. Output A is Pin 1 as you recalled and Output B Pin 7, thanks to Toth for the link to the data sheet. Now *I'll* bet - Tony wants to know what the comparator *inputs* are connected to. Tonight's work is cut out for me. But in any case, I'm still guessing the power supply is a likely culprit. It looks like the comparator is properly protecting the mainboard from an overvoltage on +5V or +3.3V. I don't know what's going on with +3.3 being referred to something other than ground. In either case, a lower +5V supply (= appropriate repair to the PSU) would solve the problem. Is replacing all of the PSU output electrolytic capacitors just on suspicion a good move? That's what I plan for the weekend. (Lucky for me capacitors are not entitled to due process.. :-) ) - Mark

23 years, 4 months

[GreenKeys] Original meaning of ASCII codes (fwd)

by jpl15＠panix.com

Of possible interest to the List... ------------ Tear along dotted line ---------------------- From: jones(a)pyrite.cs.uiowa.edu (Douglas W. Jones) Newsgroups: alt.folklore.computers Subject: Re: ASCII control codes Date: 31 Aug 1995 19:37:58 GMT From article <4239uk$ko1(a)metro.ucc.su.OZ.AU>, by adrianw@cassius (Adrian Whichello): > Some are obviously still used for their original purpose (CR, LF, the > tabbing codes etc.) but what did ENQ, EM, SUB, FS, etc. do? Thanks, - - - here's a reply I posted a year ago in June - - - Subject: Re: original uses of ASCII control codes Newsgroups: alt.folklore.computers References: <1994Jun02.064649.131411(a)ua1ix.ua.edu> To understand the original intent of the ASCII control codes, you have to think of teletypes, using paper tape, configured in a multidrop system with relay logic used to turn on or off individual teletypes in the bunch, and you have to remember that the designers were pretty smart and they anticipated future developments, but they also managed to include provisions for things that never happened. Here are the ASCII control characters, and a few others, with comments on how they were supposed to be used and how this relates to current popular uses: NAME HEX/CTL USE NULL 00 ^@ always ignored -- leader and trailer on paper tape systems was typically made of sequences of NULLs. SOH 01 ^A start of heading -- imagine a heading containing, for example, the address of the recipient. You could have relay logic that scans for SOH, then enables the print mechanism if the following character matches this station's address. In early documentation, this was called start of message. STX 02 ^B start of text -- if the heading matched, start printing with the following character. In early documentation, this was called end of address. ETX 03 ^C end of text -- now is a good time to stop printing. Your message might continue after this with a checksum or other administrative stuff. In early documentation, this was called end of message. The common use of control C as a kill character stems from this -- it indicates the end of your text addressed to some application. EOT 04 ^D end of transmission -- relay logic could decode this and, if there is a tape in the tape reader, it could begin transmitting its own message. ENQ 05 ^E enquire -- on receiving this, local relay logic would generate a response. In early documentation, this was called WRU or who are you. Teletypes had programmable response sequences that were encoded on a music box mechanism, and it was up to the customer to break plastic fingers off the drum to code how it responded to an ENQ. ACK 06 ^F acknowledge -- one possible response to ENQ. In early documentation, this was called RU or are you. BEL 07 ^G bell -- ring the bell in the terminal. Teletypes had real bells where most modern terminals have beepers of some kind. A sequence of BEL characters sent to a teletype sounded very much like a telephone ringing. BS 08 ^H backspace. HT 09 ^I horizontal tab. LF 0A ^J linefeed. VT 0B ^K vertical tab. FF 0C ^L formfeed -- page eject. CR 0D ^M carrage return -- on many mechanical devices, CR was slow. The sequence CR LF was always sent in that order so that the linefeed could be handled while the carriage was returning; a well adjusted Teletype could just finish the CR in this time (0.2 seconds), and a common sign that it was time to call the service man was that the first letter printed after a CR LF was printed "on the fly" on the way back to the margin. SO 0E ^N shift out -- if you've got a two-color ribbon, shift to the alternate color, usually red. There are obvious extensions of this to alternate character sets. SI 0F ^O shift in -- undo whatever SO does. For mysterious reasons that have no apparent connection to old or modern ASCII standards, DEC liked to use control O as a break character to suppress teletype output. DLE 10 ^P data link escape -- an escape character is generally a prefix for something else. DLE was expected to be used as a prefix on characters in the user data stream that might otherwise be interpreted as data link control characters, for example, flow control characters. In some early documentation, this was called DC0 or device control zero. DC1 11 ^Q device control 1 -- turn on the paper tape reader. In early documentation, this was called XON. DC2 12 ^R device control 2 -- turn on the paper tape punch. DC3 13 ^S device control 3 -- turn off the paper tape reader. In early documentation, this was called XOFF, The use of XON/XOFF (DC1/DC3) for flow control stems from their use to control the flow of data from the paper tape reader attached to a Teletype. DC4 14 ^T device control 4 -- turn off the paper tape punch. NAK 15 ^U negative acknowledge -- another possible response to ENQ. One flow control mechanism is to use ENQ to ask if the receiver has buffer space, and require the receiver to respond with either ACK (yes) or NAK (no). ENQ could also be used to enquire about whether a retransmission is required after sending a checksum. The popular use of control U to delete the current input line is only vaguely grounded in this definition. SYN 16 ^V synchronous idle -- if you're using a synchronous transmission protocol, and you have no data to send, you send SYN characters to keep the clocks synchronized. The receiver should ignore these, and the transmitter may have to insert them into the data stream once in a while. ETB 17 ^W end of transmission block -- used when a transmission must be broken into many blocks for some reason, for example, to place a checksum after each block. Early documentation called this logical end of media. CAN 18 ^X cancel -- take that back, what I just sent you is a mistake, ignore it. EM 19 ^Y end of medium -- there's nothing left on this reel of (paper) tape. SUB 1A ^Z substitute -- the next character is from an alternate character set. SUB X might be equivalent to SO X SI, or it might be an alternate mechanism for extending the character set. The common use of control Z as an end of file character has no obvious relation to the standard. ESC 1B ^[ escape -- the next character is to be interpreted as something other than text, for example, it might be an extended control character of some kind. FS 1C ^\ file separator -- useful if you have multiple logical files in one transmission. GS 1D ^] group separator -- useful if files are made of groups of records. RS 1E ^^ record separator -- COBOL anyone? US 1F ^_ unit separator -- are records made of units? ALT 7D } Some early teletypes had an ALT MODE key that generated this code instead of ESC. This was interpreted as an escape code, which was no problem when nobody had lower case printers, but with the advent of full 96 character ASCII, there were obvious compatability problems. PRE 7E ~ A few terminals had a PREFIX key that generated this code instead of ALT MODE, with all the same problems. DEL 7F delete -- remember, paper tape uses a hole to record each one and no hole to record each zero. DEL is all holes, so it can be punched over any other character to rub it out (on old teletypes, it was the RUB or RUB OUT key). If you mispunch a character, just back up the tape and overpunch it with a DEL. Software is expected to ignore DEL the same way it ignores NULL. ------------------------------------------------------------------- _______________________________________________ GreenKeys mailing list GreenKeys(a)mailman.qth.net http://mailman.qth.net/mailman/listinfo/greenkeys

23 years, 4 months

Wanted: RA81/RA82 Disk Platter

by bdwheele＠indiana.edu

Sort of off topic, but sort of not. My department is planning to have a roast of the former director and because he was a big user of our former VAX systems, some people think that mounting a disk platter would be a nice touch. Anyone have have an extra RA81/RA82 disk platter for free/cheap? Brian Wheeler bdwheele(a)indiana.edu

23 years, 4 months

TI 99/4a (boxed) and TI Data Recorder available

by vcf＠siconic.com

A gentlement named Ed Crawson in Texas has a TI 99/4a available for sale. It is boxed and includes a TI data recorder, which is relatively uncommon. He is missing the manuals but is currently searching for them. According to the seller it is in like new condition, having been used only slightly. He also has the TI data recorder, which is fairly uncommon. He wants to sell it. I told him $35 + shipping for the whole lot would be about fair, but you can negotiate with him. His name is Ed and he can be reached at 210/655.6400. -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org * Old computing resources for business and academia at www.VintageTech.com *

23 years, 4 months

Zapping Laptop batteries

by lgwalker＠mts.net

This has come up before but I can't remember it being resolved. I often see suggestions for rejuvenating failed or dying laptop batteries using a hi-amp source to flash them and break down the built-up crystals. Most mention breaking the pack apart before doing this individually on each cell. Is this because each cell might have different resistances ? Most of my LT batteries no longer work anyway so it would be no big loss if it totalled them. Sending a dozen or so batteries into a rebuild place is a costeffective non-option and replacing the individual cells would still be costly. Lawrence lgwalker(a)mts.net bigwalk_ca(a)yahoo.com

23 years, 4 months

VMS BBS software

by Qstieee＠aol.com

I think the people at the Retro-Computing Society of Rhode Island are doing that. See http://www.osfn.org/rcs/

23 years, 4 months

BULL PR54 / GE 400

by Felix.Hammann＠t-online.de

Dear Sirs, my father started in the late 60's with BULL machines (tabulatrices imprimantes etc.) Later we had a GAMMA 10 and also the GE415 (wich is still built up in moment). In case you are interested in any spare parts, machines, sheets, documents etc please contact me. But i also like to ask you for your assistance. We bought a BULL PR54 some time ago and want to fix it to a PC. Unfortunately there is no description about the interface (level 6/66). Can you give us any information ? best regards, Felix Hammann Fabrikstrasse 6 67454 Hassloch phone +49 6324 3001 fax +49 6324 58543 sorry i had a wrong email adress to answer back in my mail

23 years, 4 months

kaypro 2 boot disk.

by cb＠mythtech.net

>I need a boot disk for a kaypro 2. A freind gave me >boot disk for the II, but that didn't work. >Also I need a commodore pet for a display at a school, >dead or alive any model. Can the Kaypro 2 disks be copied without a Kaypro 2? I have some Kaypro 2 software, but it is already promised to someone else (just waiting for them to pick it up whenever they are next in the area). If they can safely be dupilcated with a PC, I can run off a copy while waiting (but unless this is a 100% safe thing, I don't want to do it, I don't want to risk screwing up the disks) -chris <http://www.mythtech.net>

23 years, 4 months

Zapping Laptop batteries

by mtapley＠swri.edu

>From: "Lawrence Walker" <lgwalker(a)mts.net> > > Thanks all. There's also a PD program called "deepdran.exe" (deepdrain) >which I can use to exercise the batteries after, if it's successfull. >Worth a try. There's a similar program for the early PowerPC Powerbooks. I had a really bad experience with it in my 3400. I took a couple of dead, drained, and on-the-shelf for years NiMH batteries. Charged one in the powerbook for a while (15 minutes or so) then tried this program on it. Battery ran down, Powerbook made out-of-power noises, turned off. Plugged in and reset, the battery charged up, no problem. (I'm using that battery now). The *other* battery, I figured I now knew what I was doing. I slapped it in, unplugged the powerbook immediately, and let it run down on the drain-dead program. About 10 seconds later, it made a weird buzzing, and went dead. Next time it powered up was after the power supply board got replaced. :-(. Exercise some caution. I don't know what happened - maybe the PS board got fried because the battery voltage went too low too fast? Maybe it was OK until I plugged it back in, at which point it fried trying to charge a too-dead battery too fast? Maybe there's a problem with a PS designed for Li-Ion batteries charging a NiMH battery (though it's supposed to be OK). I don't know, but I'm going to charge the other battery repeatedly in the external charger before I put it into the PB again. - Mark

23 years, 4 months

SIMH software?

by jpl15＠panix.com

Well, having got the Simulated PDP11 running - my next untutored question is: sim> att rl ....filname??? sim> boot rl ....filename??? How does one get an OS loaded on the 'machine?' Cheers John

23 years, 4 months

SIMH software?

by Fred.van.Kempen＠microwalt.nl

> How does one get an OS loaded on the 'machine?' > attach mt0 c:/dist/ultrix.tap > attach rl0 c:/dsk/rl02-0.dsk /RL02 > attach rl1 c:/dsk/rl02-1.dsk /RL02 loads the devices (a magtape unit, and two RL02 disks), and > boot mt0 or > boot rl0 should do the trick by booting the desired device. --fred

23 years, 4 months

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1998

1997

test-drb