test-drb April 1999

test-drb@ccmp.vtda.org

170 participants
1190 discussions

by danburrows＠mindspring.com

Try http://www.seagate.com/support/disc/specs/st1480n.shtml Dan >Hi all, > >anybody has a manual for this disks ? > >thanks, >emanuel >

25 years, 9 months

Speaking of Tandy & TRS-80 (was: Re: What if,... early PCs

by mbg＠world.std.com

> <Does anyone remember a similar electronics store called "Lafayette"? They ... > They were nothing like TANDY. ... > They were long gone by '79. >Correct...nothing like *Tandy*, but quite similar to Radio Shack ... >perhaps with a better mail order line, IIRC and a bit more oriented >towards parts and radio. The last one I saw was in Sunnyvale/Santa >Clara (here in the Bay Area) around 1980/1981. Lafayette similar to Radio Shack? Bite your tongue... I remember lafayette as having better quality stuff than Radio Shack, regardless of what I was looking for... I remember going over there all the time with my father when I was young... If you wanted something built to last, you got lafayette. If you wanted something built out of cheap plastic, you went to Radio Shack... Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

25 years, 9 months

source for foam filter material

by danburrows＠mindspring.com

>> Does anyone know where I might be able to buy some thin black foam filter >> material, to replace the stuiff that was used on my Teral computers? >> These systems have a large fan that draws air into the computer, and >> the intake air goes through this very thin filter, in order to capture >> large particles such as lint. Check your local DEC scrapper. The back doors from SA800's, TU8x, and many system doors had large sheets of it held in place with Velcro like strips. I save them from all the systems that go through here for replacement usage. They are about 1/2 inch thick. Dan

25 years, 9 months

Odd board find

by jruschme＠exit109.com

I came across an odd board in the dumpster at work today. Hopefully one of you might recognize it. It appears to be some sort of bubble memory board. Details: Small board, approx. the size of a 5.25" floppy drive board 2x40-pin Berg headers at one end 2x36-pin edge connectors at the other 2 very small pushbuttons 3 LEDs labelled: ERR EN RUN Obvious chips: ROM labelled "RCB1.1" Z80A Intel D7220-1 Intel 7110A-1 bubble memory module Lots of 74LS-family chips Markings: Bubbl-tec division of PC/M, Inc. Copyright 1984 PC/M INC. R-II-AM-BUBBL-A Anybody recognize this one? <<<John>>>

25 years, 9 months

OT: copying OS/2 Warp

by emu＠ecubics.com

---------- > From: Zane H. Healy <healyzh(a)aracnet.com> > To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> > Subject: Re: OT: copying OS/2 Warp > Date: Saturday, April 10, 1999 2:41 AM > > Last I checked OS/2 Warp V3 and V4 were both available. I've heard a new > version is actually in the works (despite the fact I used to be a huge OS/2 > fan I find that a little hard to believe). AFIK, that's no new version, but a major cleanup. ( A huge OS/2 fan for a long time too) cheers, emanuel

25 years, 9 months

PDP-8/E PSU Debugging (was Q-bus pinout)

by allisonp＠world.std.com

<logic, but it's beed field-modified (I guess) to take the LED modules in <the lamp sockets. The preheat resistors have been cut out. < <No idea if this was done by DEC or not (it was done before I got the <machine), but it is another possible frontpanel. Common field change but not from or by DEC. Allison

25 years, 9 months

8/E PSU resolution

by allisonp＠world.std.com

<And on mine this board: < <>M837 MC8E Extended Memory and Time Share Control < <Is right in front of the RFI shield (and core stack) Sort of "all <components of the memory subsystem together" kind of thing :-) Where the 837 goes was less important. Generally the rule was terminator in last slot and timing generator in the first one behind the FP. Then the RFI shield close as possible to the firrst core card set. Other than that there were few rules. allison

25 years, 9 months

Variac

by dastar＠ncal.verio.com

I have a Variac here that I need help connecting up. The terminals on it are as follows: O 2 4 O | | wwwwwwwwwwwwwwwwwwwwwwwwww / \ O O <--><------100V------><--> 20v | 20v O The "2" and "4" are what is labelled on those terminals. The "O" are the terminal connectors. The "w"'s are windings as depicted on the terminal panel. The panel also shows the voltages as depicted. I'm assuming the output is 2 and 4. But what is the input? The 20v sections seemingly say that you can tap off of them to get some combination of 20V, 120V or 140V? Please help! Sellam Alternate e-mail: dastar(a)siconic.com ------------------------------------------------------------------------------ Don't rub the lamp if you don't want the genie to come out. Coming in 1999: Vintage Computer Festival 3.0 See http://www.vintage.org/vcf for details! [Last web site update: 04/03/99]

25 years, 9 months

seagate st1280n

by emu＠ecubics.com

Hi all, anybody has a manual for this disks ? thanks, emanuel

25 years, 9 months

8/E PSU resolution

by allisonp＠world.std.com

<I rewired the plug on J3 to supply 5V at pin #3 (rather than going to the <voltage regulator board) and both backplanes are now functional! Running <Allison's worm program with the memory in back and the CPU and stuff in fro Congrats! Here is the lineup from mine and the recommended board layout. 54-09668 KC8FL PDP-8/F Programmer's Console M8330 KK8E Timing board, replaces M833 M8310 KK8E Major register control M8300 KK8E Major registers M837 MC8E Extended Memory and Time Share Control *space M8650 KL8E Asynchronous Data Control (current loop or RS232) M8652 KL8JA Terminal Control (UART based, double buffered) *space M849 KK8E RFI shield G111C MM8EJ 8K Memory sense/inhibit G619A MM8E Memory stack (B,M) G227C MM8E Memory X/Y drivers *space M8320 KK8E Bus loads Reminder, core runs warm and likes cooling. Allison

25 years, 9 months

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test-drb April 1999