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101090 discussions

Big Score at Dayton Hamvention RCA VIP 3301 terminal

by ethan_dicks＠yahoo.com

I only got to spend Friday morning at the Hamvention, but I think my biggest find was an RCA VIP-3301 terminal. I remember seeing ads for this 20+ years ago. The seller started off asking $50, but I talked him down to $10. eBay eat your heart out! Inside, the 1800-series chips are the following - 1802, 1854, 1869, 1870, several 1852 I/O ports, a couple of 1856 latches?, one 1867, and one 1823. The RAM appears to be five 2114 chips, the rest is glue logic and some level converter hardware, including optoisolators for the switch-selectable 20mA mode. The configuration jumpers read as the following: UC U & LC E/O M/S E/M O/S 2SB 1SB F-DPX H-DPX CTRL OFF 40/24 20/12 CL EIA LOCAL LINE 110 300 1200 4800 9600 19.2K And the backplate has the following - volume pot, speaker on/off switch, RCA video-out jack, unmarked 5-pin DIN, DB25F serial connector, 5-pin DIN marked "POWER" and a power switch. There is a LM340T bolted to the case inside, so presumably, it takes in something around 7-9VDC and regulates it down to +5VDC, but since the design is 100% CMOS and Linear circuits, it doesn't _have_ to be exactly that. So... beyond the obvious things I've mentioned, does anyone have any interesting comments about this beastie? At this point, I have no idea if the membrane keyboard is any good. I have yet to power it on. Thanks in advance, -ethan ===== Even though my old e-mail address is no longer going to vanish, please note my new public address: erd(a)iname.com The original webpage address is still going away. The permanent home is: http://penguincentral.com/ See http://ohio.voyager.net/ for details. __________________________________________________ Do You Yahoo!? Send instant messages & get email alerts with Yahoo! Messenger. http://im.yahoo.com/

25 years, 11 months

Great Find

by jrkeys＠concentric.net

Went to a police auction on Saturday and picked up a HP95LX that works great for only $5 in a box with 3 other items. No power supply was with it that I could find but it works fine using two AA's. Stopped at a Goodwill on the way home and got a couple nice mouse pads for the collection and couple nice books.A couple weeks back my wife picked a brand in the box 512k memory card for the 95LX and the cable connection kit for the 95LX at the same store for about $5 each Will be going down to Houston for two weeks and hope to get some good finds while there.

25 years, 11 months

heads up MMJ crimper tool.

by ethan_dicks＠yahoo.com

--- Chuck McManis <cmcmanis(a)mcmanis.com> wrote: > The Fry's in Sunnyvale CA has restocked its supply of "crimp" tools and has > a bunch of the Ideal Industries #30-497 tools, this does RJ-45 *and* DEC > MMJ connectors. They get $40 + tax for it which is a lot less than Black > Box wants for theirs! They do not have crimp on MMJ connectors :-( > > --Chuck Funny you should mention that tool - I bought that exact one at Fry's in 1996 for a friend who then didn't buy it from me. I just sold mine (with MMJ) to work because in four years, I never had to make an MMJ cable - I just pulled pre-made ones out of my serial cable box. Glad to see they are back in stock; I never knew they were gone. Can't beat the price, though. -ethan ===== Even though my old e-mail address is no longer going to vanish, please note my new public address: erd(a)iname.com The original webpage address is still going away. The permanent home is: http://penguincentral.com/ See http://ohio.voyager.net/ for details. __________________________________________________ Do You Yahoo!? Send instant messages & get email alerts with Yahoo! Messenger. http://im.yahoo.com/

25 years, 11 months

Mate-n-lock connectors?

by wilson＠dbit.dbit.com

Does anyone know of a source for new Mate-n-lock connectors, the horrible 8-pin nylon things that DEC used to use for everything? I'm specifically looking for the female ones with PCB-mount pins. The prints I have in front of me (for the G848 flip chip) say the housing is 1209340 and the pins are 1209456, but those part #s aren't listed in the CAS pricelist (even if you add 00 on the end and put hyphens in the appropriate places). Amp still uses the name "Mate-n-lock" for some of their current nasty nylon connectors, but I couldn't find anything on their web site that had 0.200" spacing and 8 pins in a row, and none of the regular electronics catalogs seems to have anything that looks even remotely right. Inmac used to sell the bare connectors in the early 80s, but they got eaten a while back and as far as I can tell there's no trace of their mini-oriented stuff left. Thanks, John Wilson D Bit

25 years, 11 months

Identification request - QuadexQ5000/SMS/Compugraphics/DEC ??? should I save it?

by mcguire＠neurotica.com

On May 22, Pete Turnbull wrote: > > Four boards #20033 - each has a tiny 4 pin connector and a tiny coax type > > connector (much smaller than 10b2). Main chip is N8X305N > > I've seen N8X305N somewhere recently, but I can't remember what it is :-( > It's a Signetics part, if you want to search for it. It's a microcontroller...very early architectural ancestor of today's PICs if memory serves. -Dave McGuire

25 years, 11 months

Identification request - QuadexQ5000/SMS/Compugraphics/DEC ??? should I save it?

by pete＠dunnington.u-net.com

On May 21, 11:34, Jay West wrote: > A friend called me about a cpu cabinet sitting next to a dumpster. I would > like some background and identification on this system if anyone knows. > At first blush I didn't think it would be interesting, but it looks like an > unibus system; it also had some M8043 and M8017 cards in it so it must be > something DECish? Well, those are Q-bus... Why do you think it looks like a Unibus? Is it hex wide? > Four boards #20033 - each has a tiny 4 pin connector and a tiny coax type > connector (much smaller than 10b2). Main chip is N8X305N I've seen N8X305N somewhere recently, but I can't remember what it is :-( It's a Signetics part, if you want to search for it. > one #70201 which obviously went to external devices - two 50 pin headers > which end in same connector 11/23 uses to go to external RD52's Might be a Pertec-style tape interface? > Plessey Peripheral Systems board with 50-pin berg connector #703755 That sounds like a Plessey (or General Robotics) RXV21 emulator. If so, it connects to one or two 8" drives with industry-standard SA800-type interface, and it will handle double-sided drives (a la 'RX03') too. Sorry, I can't check the number as mine's inaccessible right now. Any other distinguishing marks? -- Pete Peter Turnbull Dept. of Computer Science University of York

25 years, 11 months

TU58s all spoken for

by pat＠transarc.ibm.com

Wow, that was fast! --Pat.

25 years, 11 months

Identification request - QuadexQ5000/SMS/Compugraphics/DEC ??? should I save it?

by allisonp＠world.std.com

>> unibus system; it also had some M8043 and M8017 cards in it so it must be >> something DECish? Those are qbus. M8043 is a DLV11j 4 line serial and the M8017 is a DLV11-E serial card. >I've seen N8X305N somewhere recently, but I can't remember what it is :-( >It's a Signetics part, if you want to search for it. It's a microcontroller used commonly in hard disk controllers as the cpu. Allison

25 years, 11 months

Semi-OT: DECstation/TZ30 question

by healyzh＠aracnet.com

Since this is related to getting 2.11BSD up on my PDP-11/73 I figure it's Semi-OT. OK, I figured since I'd had to pull the TZ30 I might as well just plug it into the DECstation 5000/133 I've got. I take it that such a beasty won't recognize a TZ30? Doing a "CNFG 3" turned up the two RZ25's in the thing, but not the tapedrive, and I couldn't see it from Ultrix 4.3 either. Once again I'm asking myself *why* am I doing this, I like my UNIX lightening fast and flashy. Zane | Zane H. Healy | UNIX Systems Adminstrator | | healyzh(a)aracnet.com (primary) | Linux Enthusiast | | healyzh(a)holonet.net (alternate) | Classic Computer Collector | +----------------------------------+----------------------------+ | Empire of the Petal Throne and Traveller Role Playing, | | and Zane's Computer Museum. | | http://www.aracnet.com/~healyzh/ |

25 years, 11 months

PDP-8/L teletype connection

by djg＠drs-esg.com

From: Lawrence LeMay <lemay(a)cs.umn.edu> > The card is a W076 D. > > I need to figure out which connections on the W076 are for what 'signal', > so i can trace the wires to the DB-9 connector, and then make some > adaptor cables. Does anyone have that information on the W076? My > books dont list the W076. And which pairs on the W076 are active/passive, > and am i correct in assuming that active pairs on one device connect to > passive on the other end, ie, active supplies the current for the loop? > It took me a while to remember where they stuck the schematic for the W076 but I found it. If you get the 8/I maintenance manual from http://highgate.comm.sfu.ca/pdp8 volume I Figure 5-7 pg 5-16 shows the schematic for the W076 and the connections to the teletype. I see that the page was scribbled on, the numbers from top to bottom are 4 6 3 relay- 7 relay+. > I would want to connect a Teletype model 33 (assuming the one i'm > supposed to be getting one of these days actually works...). Also, > I would like to be able to connect an IBM to the 8/L, and hopefully > use it to download paper tape images (probably using a rs232/current-loop > interface). Has anyone been using an IBM like this in place of a > ASR terminal? > If you get an ASR-33 which wasn't used for a PDP-8 I have instruction on how to add the reader run relay. I have used a PC (ok it was an old TI PC, used a different serial port which supported hardware flow control which I connected to the reader run signal) to talk to my 8/I, I built an external current loop converter. If you need more information on this email me, from later postings it looks like you might have a current loop card for the PC. If you get overrun problems it may be due to not having the reader run signal. The 8/I serial port is not double buffered so it doesn't have much time (1-2 bit time) to remove the character before it is lost by the next. If I remember correctly only some things like Focal couldn't keep up at 110. David Gesswein

25 years, 11 months

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