test-drb October 2002

test-drb@ccmp.vtda.org

261 participants
654 discussions

by classiccmp＠crash.com

A couple weekends ago I finally made it to the Flea at MIT - only been meaning to go since 1989... Anyway I was looking for a vendor and wound up watching an exchange between a different vendor and this guy in a corduroy jacket. The short of it was, this vendor was desperate to not have to load all the Tek scopes he had back into the truck. Corduroy boy was balking, and the vendor only got more flustered when he was asked if the scope could be hooked up to a stereo to do something cool ;^) So I watched this play out. I'd been thinking I should pick up a scope, as I hope to start tinkering with hardware again sometime soon. But I was thinking about some simple dual trace 20-50 MHz unit... What I got for $100 was a Tek 7834 Storage Scope on a Model 3 cart. With the following 4 plugins: 7A22 differential Amplifier, 7A26 Dual Trace Amp, 7B85 Delaying Time Base, and 7B53N Dual Time Base. And upon getting it home it did, indeed seem to work. Of course I have no probes or manuals, but I got traces and labels and whatnot on the screen. Calibration? Who knows... Anyway, I was wondering what my options are for getting some probes for this beast. Things show up on eBay, and I'll keep an eye out there. There's a local shop that has Velleman probes tho I don't know for how much. Where do you go for probes? Also, anybody have a preferred instructional source, "Using O'scopes For Fun and Mayhem" perhaps? Thanks, --Steve.

21 years, 8 months

[poss OT]: WTD: (UK) NTSC-to-PAL module or NTSC-capable monitor

by philpem＠dsl.pipex.com

Hi, I've just finished building a COSMAC Elf and I've hit a major stumbling block. The CDP1861 video chip outputs monochrome NTSC video. Unfortunately all the monitors I've got are PAL, VGA or SuperVGA. Soooo... Has anyone got an NTSC-to-PAL converter for sale (or can suggest a possible source)? Or maybe even a 5" to 9" NTSC-capable monochrome or colour monitor? If the latter, a vertical hold control would be useful, but not essential. I can get composite video (combined video+sync) or separate Csync/video (luminance) at 5V/0V CMOS level out of the 1861, whatever is needed. Thanks. -- Phil. philpem(a)dsl.pipex.com http://www.philpem.dsl.pipex.com/

21 years, 8 months

halloween thoughts

by fmc＠reanimators.org

Sark <ian_primus(a)yahoo.com> wrote: > Being that it is halloween, I got some candy to pass out to trick or > treaters. I also thought that it might be an opportunity to clean out > my junk heap... Didn't y'all catch FoxTrot in this morning's funnies? <http://www.ucomics.com/foxtrot/2002/10/31/>, only good for two weeks, and it probably works better with one of those gooey browsers. Wish I'd seen it before I got dressed, I'd have worn my ActiveX t-shirt to the office. Hey, it's the scariest piece of clothing I own. -Frank McConnell

21 years, 8 months

TRS80 Model 3 i/o connectors

by acme_ent＠bellsouth.net

> From: Fred Cisin (XenoSoft) <cisin(a)xenosoft.com> > When you open it, be careful with the back end of the picture tube. I had it open when I was working on the drives, and actually managed to get it reassembled without inflicting any damage -- to the system or myself! ;>) Glen 0/0

21 years, 8 months

halloween thoughts

by ian_primus＠yahoo.com

Being that it is halloween, I got some candy to pass out to trick or treaters. I also thought that it might be an opportunity to clean out my junk heap... <ding dong> "Trick or treat!" "Here you are, there's one for you, one for you, and one for you" "But what am I going to do with a 2400 bps modem?" "I don't want a broken disk drive!" "Can't we have some candy?" "Sure, if you take this broken monitor..." Ok, maybe not. How about drawing eyes and a mouth on a broken monitor... a Jack-o-CRT? Or maybe I could try giving away AOL CD's... Computer parts go pretty well with other holidays, broken 30 pin SIMM's make pretty good Christmas ornaments, and as a tech I knew once said, it's a good idea to keep a stack of greenbar around so that on Saint Patrick's day, so that you can go someplace to drink... a green bar. <har, har, yeah I know it's pretty bad> Sorry, I couldn't help posting this (retreats into corner). Ian Primus ian_primus(a)yahoo.com

21 years, 8 months

halloween thoughts

by ian_primus＠yahoo.com

21 years, 8 months

Best programming suite recommendations.

by rwittig＠chicago.us.mensa.org

+AD4- So I'm looking for what you out there have voted for as +AD4- your programming environments (for those of you who +AD4- program, probably over 50+ACU-). MS Visual Studio 6.0 C+-+- MS QuickBasic 4.5 MS QuickC 2.0 DOS PowerBasic 3.0 (? not sure of ver) Borland C 2.0 DOS Borland C+-+- 3.0 DOS Lattice C DOS +ACo-nix cc +ACo-nix gcc with Code Fusion IDE scripting... Perl PHP sh shell bash shell -wittig http://www.robertwittig.com/ A business is as honest as its advertisements. .

21 years, 8 months

LSI-11 WCS and MICROMs

by mbg＠TheWorld.com

>I just realized that my reply to Jerome's inquiry about the >LSI-11 module with five chips was probably wrong. IIRC, the >LSI-11 chip set consists of the control chip, data chip, and >two MICROMs for the base instruction set. The EIS/FIS (KEV11) >is a single additional MICROM. So the original quad-height >LSI-11 module would have four 40-pin chips without the EIS/FIS, >or five with. Correct... and with 5 sockets, there would be one left over for either the EIS/FIS option or WCS, not both. >Was it the LSI-11/2 half-height module that sometimes used >a hybrid with two MICROMs? If so, it was probably the two >microms that implemented the standard instruction set, in >order to leave a socket open for the KEV11. Actually, I've seen the dual microm used on both 11/03s and on 11/2s, as well as on the PDT (I have a couple of those which have been so modified). The 3007/3010 chips are combined into one dual microm. This would allow boards with only 4 sockets (like the PDT) to add EIS/FIS. >On the 11/23 and 11/24, some of the chips were also on dual-chip >hybrids. The FPU chip for the 11/23,24 was a dual carrier chip. The CIS option was a hex-carrier chip. It had 6 of those small gold chips on it, and spanned two sockets of the 11/23[+] board. I don't know if it could go on the 11/24. (I have a KDF11-B with one of these chips on it). Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | email: gentry at zk3.dec.com (work) | | Unix Support Engineering Group | mbg at world.std.com (home) | | Hewlett Packard | (s/ at /@/) | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 (DEC '77-'98) | required." - mbg KB1FCA | +--------------------------------+-------------------------------------+

21 years, 8 months

In search of qbus WCS...

by mbg＠TheWorld.com

Does anyone have a WCS (writeable control store) board? If someone does, I need a dump of the contents of the microms of the LSI chipset... I'll be happy to write the program to do the dump... (If you also have the EIS/FIS chip, so much the better) Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | email: gentry at zk3.dec.com (work) | | Unix Support Engineering Group | mbg at world.std.com (home) | | Hewlett Packard | (s/ at /@/) | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 (DEC '77-'98) | required." - mbg KB1FCA | +--------------------------------+-------------------------------------+

21 years, 8 months

VCF East ? [was:Re: VCF5]

by jss＠subatomix.com

On Wednesday, October 30, 2002, Bob Brown wrote: > I'm still hoping for a VCF-midwest! <aol> I'd like to see one of those too someday. </aol> And if we ever have one, well, I know of ClassicCmpers in Kansas, Missouri, and Texas, so Oklahoma (my location) seems a natural choice. :-) Maybe I could convince David Boren to give us some cheap convention space at the University of Oklahoma. I would exhibit. -- Jeffrey Sharp

21 years, 8 months

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test-drb October 2002