test-drb January 2002

test-drb@ccmp.vtda.org

303 participants
1201 discussions

by dhquebbeman＠theestopinalgroup.com

I repaired one of these back in '88... for an unlit LCD screen and an 8088 processor, this was a very nice laptop. I'll try to contact my former employer, see what he might still have... but ISTR it had a brick supply, negative center... -dq

24 years, 1 month

"The Home Computer Course" published by Orbis, 1983

by Adrian.Graham＠corporatemicrosystems.com

> -----Original Message----- > From: Phil Guerney [mailto:guerney@bigpond.com] > Sent: 08 January 2002 13:37 > To: classiccmp(a)classiccmp.org > Subject: Re: "The Home Computer Course" published by Orbis, 1983 > > > From: <OMikeEdwardsO(a)aol.com> > Sent: Tuesday, January 08, 2002 1:42 AM > Subject: "The Home Computer Course" published by Orbis, 1983 > > > > I have the complete set (i think) in two grey binders. Does anybody > > know if it is of any value? Is it collectable? > <snip> > They have come up on e-bay for about $US 60 for the ten > volume set and 20-40 > for the two-volumes, so yes they have some value. > There's a set on ebay right now and it hasn't been bid on yet so it's still at $4; or at least it was last night when I checked! cheers a

24 years, 1 month

Back to board washing for a moment

by Adrian.Graham＠corporatemicrosystems.com

> -----Original Message----- > From: Richard Erlacher [mailto:edick@idcomm.com] > Sent: 08 January 2002 13:49 > To: classiccmp(a)classiccmp.org > Subject: Re: Back to board washing for a moment > > static sensitive parts on them, but they do frequently have > pot's, etc, that > won't benefit from residue of detergen in them. You can > clean the solder-side > of the board with alcohol and wash and rinse it with the same > procedure. Noted. In that case I'll desolder the flyback and proceed with the spray detergent; there's only 2 or 3 pots on there. cheers a

24 years, 1 month

Back to board washing for a moment

by Adrian.Graham＠corporatemicrosystems.com

> -----Original Message----- > From: Tothwolf [mailto:tothwolf@concentric.net] > Sent: 08 January 2002 12:23 > To: classiccmp(a)classiccmp.org > Subject: Re: Back to board washing for a moment > > Make sure you properly discharge the CRT and other caps in > the HV section > before disconnecting the anode lead from the CRT. You can > find some basic > service and safety information on the sci.electronics.repair > FAQ located > here: http://www.repairfaq.org/ Thanks for that; the board's been out of the chassis for over a week now; I've just been trying to find time to clean it up. If the flyback is suffering from bad soldering could that itself cause stress in other components and thus the smoke? It won't take long to resolder everything since it's not a very big board..... cheers -- Adrian Graham, Corporate Microsystems Ltd e: adrian.graham(a)corporatemicrosystems.com w: www.corporatemicrosystems.com w2: www.binarydinosaurs.co.uk (Online Computer Museum)

24 years, 1 month

Spectravideo SV328 II (was:RE: VTech Laser 50?)

by Adrian.Graham＠corporatemicrosystems.com

> -----Original Message----- > From: Phil Guerney [mailto:guerney@bigpond.com] > Sent: 08 January 2002 12:30 > To: classiccmp(a)classiccmp.org > Subject: Re: Spectravideo SV328 II (was:RE: VTech Laser 50?) > > > I have a PSU here labelled FOR SV318/328 USE ONLY, so I do > not know about > the SV328 II. > > It is labelled Input AC 240V 50Hz 35 W (this is Australia!) > Output AC 16V 0.8A > Output AC 9V 1.5A Thanks Phil, that gives me 2 options to check later on. cheers -- Adrian Graham, Corporate Microsystems Ltd e: adrian.graham(a)corporatemicrosystems.com w: www.corporatemicrosystems.com w2: www.binarydinosaurs.co.uk (Online Computer Museum)

24 years, 1 month

IBM 5181001 Printer available

by computermedic＠winesburg.com

do you still have the printer? if so, how much? d.g. wiedle computermedic(a)winesburg.com

24 years, 1 month

Spectravideo SV328 II (was:RE: VTech Laser 50?)

by Adrian.Graham＠corporatemicrosystems.com

Hi folks, Talking about missing AC PSUs does anyone know the power requirements of the SV328? I got one recently and it's missing it's power.....the socket on the machine is identical to the TI99/4A, but the TI99 PSU kicks out something like 8V and 16V instead of the usual 5 and 12. Anyone got one handy? cheers -- Adrian Graham, Corporate Microsystems Ltd e: adrian.graham(a)corporatemicrosystems.com w: www.corporatemicrosystems.com w2: www.binarydinosaurs.co.uk (Online Computer Museum) > -----Original Message----- > From: Cameron Kaiser [mailto:spectre@stockholm.ptloma.edu] > Sent: 08 January 2002 03:48 > To: classiccmp(a)classiccmp.org > Subject: Re: VTech Laser 50? > > > > Does anybody know anything about this thing? The local > thrift shop > > has one that they claim works (but they don't know how to > work it), with > > everything but an AC power supply. It comes with a very > broken box, or > > pieces of it, instruction manual and a Basic tutorial. The > sticker on > > the back says 1985. The console itself is cosmetically perfect. > > Is this a little LCD computer? If so, basically, that's all > there is to it. > I liken it to being an oversized Tandy Pocket Computer in approximate > power and programmability. > > -- > ----------------------------- personal page: > http://www.armory.com/~spectre/ -- > Cameron Kaiser, Point Loma Nazarene University * > ckaiser(a)stockholm.ptloma.edu > -- The fastest way to fold a map is differently. > ------------------------------ >

24 years, 1 month

Spectravideo SV328 II (was:RE: VTech Laser 50?)

by Adrian.Graham＠corporatemicrosystems.com

> -----Original Message----- > From: r. 'bear' stricklin [mailto:red@bears.org] > Sent: 08 January 2002 10:39 > To: 'classiccmp(a)classiccmp.org' > Subject: Re: Spectravideo SV328 II (was:RE: VTech Laser 50?) > > Here, the front of my power supply reads: > > SPECTRAVIDEO > POWER SUPPLY > MODEL NO: 318 - 202 > EXPANDER SV-601 USE ONLY > > INPUT: 120VAC 60 Hz 65W max > OUTPUT: PINS 1,2 14V 2A > 3,4 6V 3A > > The output plug is labeled thusly: > > ----------- > 1 -> | * * | <- 2 > 3 -> | * * | <- 4 > ----------- > > I would guess, with outputs rated at 6 and 14 volts, that this is an > unregulated supply. That's an excellent starting point; 6 & 14 volts is ringing bells with me, and there are some caps on the motherboard which could be part of a regulating circuit. Pinouts match too, I think. I can make sure tonight. Thanks! -- Adrian Graham, Corporate Microsystems Ltd e: adrian.graham(a)corporatemicrosystems.com w: www.corporatemicrosystems.com w2: www.binarydinosaurs.co.uk (Online Computer Museum)

24 years, 1 month

Some pointers needed on a 11/70

by quapla＠xs4all.nl

Pete Turnbull wrote: > > OK. From what you've written there, and a few other places, I assume you > have some manuals and/or printsets? Most of them, but from the MK11 memory box, only the MOS board and both controller boards. > > > That's an unusual address, and it's only 32K bytes (16KW). You said > you > > > had two 64KW boards. What type are they? They probably have switches > Are they M8728-AA or M8728-CA? The latter is only 16KW. The easy way to > tell the difference, if there's no -A or -C beside the number, is that One is a '-AA' version, the other is a '-AC' one, and both are fully populated. > I was, no surprise to anyone, wrong about their having switches -- > showing > my ignorance about the specifics of 11/70's. Most of the things I've > written are gleaned from the meagre information in one or two of the > processor handbooks, or from my (incomplete) collection of microfiche. Well, nobody is perfect :=) > > Anyway, the memory box has switches on the front (and I assume you've > checked those?) but as far as I can see from the 'fiche, the memory card > base addresses depend only on their position in the box. So the two cards > have to be adjacent, and nearest the other cards, I think. Do you agree? There are no switches at the front of the box, unless you mean the control panel which contains the thumbwheel switches and a few other switches? Do you have documentation on the data buffer board? This one does have 2 switchbanks, and all are currently 'open'. Those 2 boards are the only one for which I do not have any docs. > > It looks as though the box might be set to the wrong address -- 400000 > is > 131072 decimal, or 128K -- and is only showing 16KW (32KB) of memory. I > don't know how you set the address of the box, though. I changed the size register on the 8143 to 32K, and it 'disappeared' completely >from the system, i.e. no memory address was usable. I then changed 2 switches (W12 & W15 seem to be wrong marked in one of the FE sheets) and is was visible again, and it still was set at 400000... > > It is the 23-233F1 diag rom. > > OK, I've found some data (actually the listing) for that ROM. It's > assembled at 165000 (but it looks like position-independant code, so > that's > possibly not its real address). It ends at 165776, ie 1000 bytes (octal) > later. It is indeed an 11/70 diagnostic ROM for the M9312, probably just > a > later version than the 23-616F1 my other docs refer to. > > The docs say there's no way to enter the diagnostics directly, only by > entering a bootstrap at the "run with diagnostics" address. They suggest > that would be 173006/173206/173406/173606 depending on whether you're > booting from a bootstrap ROM in socket 1, 2, 3 or 4. > > The docs also say that when the 11/70 powers up (or you press a boot switch > attached to TP1 and TP2 on the M9312), it loads the PC from address 773024, > and PSW from 773026. And indeed every boot ROM has a reserved word at that > address for the PC, followed by 000340, which is the usual interrupt mask > to set in the PSW for booting. Every ROM has code (opcode SEC) starting at > 173x04 leading to a BCC BDIAG at 173020. In every boot ROM, that branch > goes to an absolute jump, JMP _at_#DIAG, which in turn leads to a > PC-relative > jump at absolute address 165564, which goes to 165000 (the actual code is > 165564 000167 177210 DIAG: JMP START). > > Why do you think address 777644 is the diagnostics ROM start address? That was a mistake, I did mean 765744, which is spoken about in the documentation. > All the 11/70 tests halt on error (unlike the CPU diagnostics for the > 11/34 > and other processors, which loop on error). The first section tests > assorted instructions that needn't to use memory, the secondary CPU > tests > use the stack (R6 set to 000776). However, the very first instructions > in > the diagnostics code store registers at 000700...000704, and use 000706 > to > hold a flag which tells the code whether it's running on an 11/60 or an > 11/70. If the memory isn't working, this will cause problems later in > the > diagnostics. > > Address 165344 is one of the error halts partway through the secondary > CPU > tests (assuming the diag ROM starts at 165000). What it does is set > SP=776, then does a PC-relative JSR to the address 2 ahead of where it > is. > The code there checks to see if the top of the stack contains the > correct > return address, and should halt at 165326 if it doesn't (it should halt > at > 165320 if the JSR didn't execute). If it does see the correect return > address, it adjusts the stack contents, does an RTS, ending up at > 165342. > At 165342, it pushes a zero and an address on the stack and then tests > RTI. 165344 is the address of the push instruction, and 165350 is the > RTI. > That's folowed by a jump to the next test, which is the memory-sizing > routine. > > So having it loop until you stop it, and then halt at some address > ending > in 344 doesn't make much sense to me. Either you're not starting at a > sensible address, or there's something wrong that is sending it into a > loop. That could be a CPU fault, or maybe (I've not read all the cache > test code) something to do with not having memory between 000700 and > 001000. That sounds more logical to me, but I can only substantiate that when I have the memory being available at address 000000. As a tryout, I'll swap all the other boards in the cpu (I have a complete spare CPU) to see if this has some effect as well. I didn't do this before, as the machine was in operation until about a year ago, so it is likely to assume that this could have worked. I do not know if the MK11 is the original one, or is from another 11/70. I'll let you know tomorrow. Ed -- The Wanderer | Politici zijn gore oplichters. quapla(a)xs4all.nl | Europarlementariers: zakkenvullers http://www.xs4all.nl/~quapla | en neuspeuteraars. Unix Lives! M$ Windows is rommel! | Kilometerheffing : De overheid '97 TL1000S | weet waar je bent geweest!

24 years, 1 month

VAX manuals

by doc＠mdrconsult.com

No, it's not yet another Gray wall... I have 2 packages of VMS installation docs, "VMS Installation and Operations VAXstation 8000" Order Number AA-LB33A-TE "VMS Installation and Operations VAX 6000 Series" Order Number AA-LB36B-TE Both are 5-ring insert sets, maybe 20-30 sheets + tabbed divider & end divider, and both are "new", in shrinkwrap. They were lurking in my Gray Wall. Anybody want them? Doc

24 years, 1 month

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test-drb January 2002