test-drb

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101090 discussions

by robert.jarratt＠ntlworld.com

Not too long ago I picked up a DEC Venturis FX 5120. It contains a 3COM 3C905-TX network card. There are some sites around the web that purport to have drivers for this card, but I am very wary of downloading anything from these sites. Does anyone happen to have drivers for this card? I am not sure what OSs this card was supported on, so any drivers at all would be appreciated. Thanks Rob

10 years, 4 months

More Manuals

by wrcooke＠wrcooke.net

Hi all, I just signed up today and haven't been admitted to the group, so I couldn't reply to the appropriate message. But, in browsing through recent messages I saw the one with a link to loads of manuals. My first thought was that if that was interesting, this one would be too. Manuals for tons of old test equipment. http://bama.edebris.com/manuals/ Will

10 years, 4 months

PDP-12 Restoration at the RICM

by michael.99.thompson＠gmail.com

Lots more work on the PDP-12 at the RICM. We got an RS-232 console board and baud rate generator from Vincent and now have both serial ports working. Warren modified Kyle's SerialDisk and we booted OS/8 from an emulated RK05 on the second serial port. We fixed one of the bus interface boards in the DW8E Omnibus expansion chassis, and connected the RX8E/RX02. We were able to boot OS/8 from an RX01 diskette. We replaced an M160 flip-chip and now the EAE instructions work. We replaced an M103 flip-chip and the KW12 clock works. This system is new enough that ECO EM12-0055 for the KW12 was installed when it was built. This means that the KW12 Maindecs earlier than D8CD will not work. We cleaned up the PC04 paper tape reader/punch and connected it to the PC8E. The punch works OK, but the reader does not always step correctly and does not read the tape correctly. Fixing this will be the next project. Once we get the PC04 working the next project will be the RK8E/RK05. Out of frustration we set aside fixing the TC12 LINCtape controller. We see spikes on data track #3 that corrupt the data. We swapped the TU56 for a known good TU55, swapped the data/control cable, and swapped every flip-chip that is related to data track #3. Nothing has eliminated the spikes. The only part that we have not swapped is the backplane wiring between the data cable and the G882 flip-chips. Warren has a plan to temporarily replace that. We found that the maintenance prints that came with the system do not include ECO EM12-0055. Does anyone have a set of KW12 prints that include ECO EM12-0055? -- Michael Thompson

10 years, 4 months

Massive document depository

by j＠ckrubin.us

This was shared on the TekScopes mailing list - http://bee.mif.pg.gda.pl/ciasteczkowypotwor/ "Massive" is an understatement. Jack

10 years, 4 months

Piggybacking 74LS logic chips to confirm a suspected fault

by terry＠webweavers.co.nz

Hi, I've written up my recent third Apple II repair, this time an Apple IIe. http://www.classic-computers.org.nz/blog/2015-12-22-appleiIIe-no-video.htm One interesting aspect of this repair is that piggy-backing a logic chip helped confirm a faulty one. I'd only ever used this technique with RAM. I'm sure it only works if the chip has a particular type of fault, but it worked this time for me. Terry (Tez)

10 years, 4 months

EAI TR-10 Patch Plugs

by dave.g4ugm＠gmail.com

Folks, I own an EAI TR-10 analog computer which sadly came without any patch cables and accessories. Normally this wouldn't be a problem, BUT the TR-10 comes with special resistive plugs which go at the ends of the patch leads. These have a 4mm plug and socket with a 10k or 100k resistor in between. I can't figure out a way to easily fabricate replacements. I can easily obtain 4mm plugs and sockets, and solder a resistor between them, but when I try and mount them on a short rigid tube all my efforts fail. The plug and socket need to be twisted in opposite directions and any soldered joint just fails. Any usggestions? Does any one have some of these and if so how are they constructed? Dave Wade G4UGM

10 years, 4 months

S/36 for sale. Also AS/400 - Greenville, SC

by dave.g4ugm＠gmail.com

Not sure if folks on here follow the Vintage Forums. http://www.vintage-computer.com/vcforum/showthread.php?50494-Complete-IBM-Sy stem-36-with-AS-400-Advanced-36-tower-and-IBM-4234-Dot-Band-Printer Dave G4UGM

10 years, 4 months

Merry Christmas

by COURYHOUSE＠aol.com

Yes and a Marry Christmas to you and yours Jay! Ed# In a message dated 12/24/2015 7:15:45 P.M. US Mountain Standard Time, jwest at classiccmp.org writes: Just wanted to say a very sincere Thank You to all the talented folks that hang out here and call this place home, and also to wish you and yours a Merry Christmas. Best, Jay West jwest at classiccmp.org

10 years, 4 months

HP 16702A logic analyzer failed Ethernet (was Re: dumping Western Digital Microms)

by spacewar＠gmail.com

I wrote about my HP 16702A not working on Ethernet any more. On Mon, Dec 21, 2015 at 8:08 AM, Glen Slick <glen.slick at gmail.com> wrote: > Assuming you are using 10BT for the network connection, do > you have the terminator cap installed on the 10B2 BNC jack? I think > some things don't work right with the 16700A/16702A network without > that terminator cap installed. I tried it. Didn't work. I also tried connecting the 10base2 to a 10 Mbps hub, and another port to my "real" network, and that still didn't work. As HP-UX boots, it says: <timestamp> auto_parms >> Network was disabled by boot scripts on previous oot. Re-activating the network. 8/16/6 <macaddr> 0 UP lan0 DOWN 4 ETHER Yes 52 <timestamp> auto_parms >> /sbin/auto_parms, checking network for DHCP server (see /etc/auto_parms.log) Then in the progress list, it shows: Configure LAN interfaces .................... [FAIL] * Check LAN Status .............................. [N/A ] [...] Configure HP Ethernet interfaces ......... [ OK ] Configure HP 100BT interfaces ............ [N/A ] Configure LAN interfaces ..................... [ OK ] Then once the logic analyzer application is up, it shows an error log window, which says There was a DHCP error . Network was disabled. But if I go to network settings, it says: Network hardware not usable - Is the network connected? And all of the radio buttons (e.g., to select "standard" configuration instead of DHCP) are greyed out and I can't configure it. I think the Ethernet ports on this beast are dead. :-( I'm not sure whether it's the CPU board or the I/O board that is dead, but Keysight, or whoever they are this week, wants more money for either of those boards than eBay pricing for a used 16700A or 16702A.

10 years, 4 months

PDP-12 Restoration at the RICM

by michael.99.thompson＠gmail.com

> > Date: Tue, 22 Dec 2015 20:56:51 -0600 > From: Jay Jaeger <cube1 at charter.net> > Subject: Re: PDP-12 Restoration at the RICM > Message-ID: <567A0D73.2010304 at charter.net> > Content-Type: text/plain; charset=utf-8 > > I have an image of MAINDEC-12-D8CD-PB, and a listing as well > (MDEC-12-D8CD-L in my inventory). Let me know if you need them as well > as the drawings (see below). It is in an archive folder with a bunch of > other interesting PDP-12/PDP-8 stuff. > I wrote a program to export a BIN formatted file from a LINCtape image so we were able to make a BIN image of MAINDEC-12-D8CD. This runs OK, where the D8CC does not. Can you give me a pointer to the SerialDisk info? Sounds interesting. > Kyle's SerialDisk is here: https://github.com/drovak/os8diskserver > Hopefully you can actually fix the original M160 and M103 cards. > We have been able to fix all types of broken flip-chips. Sourcing the components is sometimes a challenge. The Germanium transistors for the TU20 on the PDP-9 were hard to find. > > > > We found that the maintenance prints that came with the system do not > > include ECO EM12-0055. > > Does anyone have a set of KW12 prints that include ECO EM12-0055? > The prints that came with this PDP-12 are here: http://bitsavers.trailing-edge.com/pdf/dec/pdp12/maintenance/DEC-12-HR2B-D_… Now that I looked in the ECO block I can see that they actually do incorporate ECOs 55 and 57. The machine wiring does not match the CLC page, so maybe there are more recent ECOs in the machine and not in the prints. We visited the RCS/RI crew last weekend and used their PDP-12 to format some LINCtapes. At least we have some freshly formatted, known good, LINCtapes for the TC12 debugging. Jay, we are interested in anything PDP-12 related that we don't have. The PDP-12 is described here: http://www.ricomputermuseum.org/Home/equipment/dec-pdp-12 Details on the PDP-12 restoration process are here: http://www.ricomputermuseum.org/Home/equipment/dec-pdp-12/dec-pdp-12-restor… -- Michael Thompson

10 years, 4 months

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