test-drb

test-drb@ccmp.vtda.org

101090 discussions

by marvin＠west.net

On the off chance that someone on the list wants it and doesn't like the idea of shipping, I'll be going to VCFMW in September and could bring it along. My route will be Santa Barbara, Las Vegas, north to I-80, and I-80 to the Chicago area. After that, I'll be headed to Pittsburgh, PA and it can be dropped off along the way. I can also head out to Goleta (basically Santa Barbara) and check out what this person has. Marvin >> On Mar 3, 2019, at 10:35 AM, Ray Arachelian via cctalk <cctalk at classiccmp.org> wrote: >> >> On 03/03/19 12:58, Marvin Johnston via cctalk wrote: >>> I just ran across this and while I'm not interested, someone on the >>> list might be. >>> >>> https://santabarbara.craigslist.org/sys/d/apple-512k-lisa-computer-valuetec… >>> >>> >>> It was posted about 14 days ago, and looks to be in Santa Barbara, CA. >>> >> That doesn't look like it's a Lisa, it may be a tempest hardened Mac 512. > > An interesting system. Someone needs to save this. Based on the description, and the way it looks, I think you?re right about it being designed for TEMPEST hardening. There were some TEMPEST versions of the Mac II. > > Zane

7 years, 5 months

Old SunOS distributions recovered

by aek＠bitsavers.org

http://bitsavers.org/bits/Sun/SunOS 1/2" distribution tapes for 0.4 beta, 1.1, 2.0 and the 2.2 update, circa 1983-85

7 years, 5 months

DECtalk-PC Schematic

by kylevowen＠gmail.com

Hi all, I recently got one of these DECtalk-PC ISA cards from eBay ( https://www.ebay.com/itm/183684666377, no affiliation with seller other than a happy customer) and was wondering, does anyone have a schematic for this? Thanks! Kyle

7 years, 5 months

Data Systems Design DSD-4140 microcode PROMs

by jzatar2＠illinois.edu

Hello Everyone, We found a PDP-11 QBUS card cage with a KDF11 and some other cards (RAM, ROM, some basic peripherals) which included a DSD-4140 card. Unfortunately, the DSD-4140 is missing one of it's microcode PROMs for some reason. Does anyone else have one of these cards? It'd be really helpful if we could get some dumps of the 4 microcode PROMs so we can compare what we have and look into replacing what we don't have with an adapted modern part. (and if anyone goes to the trouble to read the 4 microcode PROMs, there's also an 82S137 that deserves to be dumped). Here's a picture of the card in question: https://i.imgur.com/tzYjPYF.jpg Regards, Joe Zatarski

7 years, 5 months

KA650 VAX memory error

by jzatar2＠illinois.edu

On Sat, Mar 2, 2019 at 3:16 PM Glen Slick via cctalk <cctalk_at_classiccmp.org> wrote: >On Sat, Mar 2, 2019 at 12:02 PM Joseph Zatarski via cctalk ><cctalk at classiccmp.org <http://www.classiccmp.org/mailman/listinfo/cctalk>> wrote: >>//>>/On a somewhat related note, I don't suppose anybody knows or has />>/documentation on the pinout of the C/D interconnect on these RAM boards? />>/The pinout for the ribbon cable is in the manual, but the C/D />>/interconnect doesn't seem to be documented in any of the manuals that />>/are online. /> >650QS Field Maintenance Print Set, MP-02538-01, Rev C1 >http://www.bitsavers.org/pdf/dec/vax/650/MP02538_650QS_Sep88.pdf <http://www.bitsavers.org/pdf/dec/vax/650/MP02538_650QS_Sep88.pdf> > >Page 65 of the PDF, KA650 Circuit Schematics Page 23 of 40 >MA0 - MA9 >CAS0 - CAS3 >RAS0 - RAS3 >WE >SE >XADDR20, XADDR21 >+5 >GND > >Page 47 of the PDF, Page 5 of 40 is an overview block diagram of those >signals originating at the DC357 CMCTL Memory System Controller. OK, thanks, that's great. Now I won't have to bother tracing things out if I decide to go that route. Didn't realize there was a printset for the KA650, but I guess I didn't even bother to check.

7 years, 5 months

KA650 VAX memory error

by jzatar2＠illinois.edu

Hello Everyone, I've got a KA650 with a MS650-AA 8MB memory module. When we initially started messing with this VAX, it was giving a memory error. We were able to track down first the bad bank, and later the individual bad ZIP RAMs with the help of my logic analyzer. For now, I kludged an SOJ DRAM in there that seems to be working without issue. The machine no longer gives memory errors during POST, but if you run one of the more thorough memory tests like #48 (MEM_Addr_shrts), it fails. My initial thought was that this RAM test checks for shorted address lines, which would cause writing to one location to change another location perhaps. However, I haven't been able to replicate the error with DEPOSITs and EXAMINEs on the console. Without having to disassemble the VAX ROM, does anybody know what this test does? Once I know what I'm looking for, I can probably convince the logic analyzer to see the error with some fancy triggering, and get this board 100% fixed before I order some ZIP DRAMs. On a somewhat related note, I don't suppose anybody knows or has documentation on the pinout of the C/D interconnect on these RAM boards? The pinout for the ribbon cable is in the manual, but the C/D interconnect doesn't seem to be documented in any of the manuals that are online. With the price of MS650's these days, it seems like the cheaper route (albeit more work) is to build a new RAM board rather than buy one (especially if a single 64MB board could be made). I suspect it's not too complex anyway, and it can probably mostly be traced out, and the rest inferred and then verified with a logic analyzer. Thanks, Joe Zatarski

7 years, 5 months

HP logic analyzer QFP132 interposer and DSD-4140 microcode ROMs

by jzatar2＠illinois.edu

Hello everyone, I've got two unrelated things I'm looking for: The first is an HP logic analyzer interposer for the emulation adapter for an MC68332. This would have a PGA socket on it, and sort of a reverse socket for the QFP132 package (attaches to a chip from the top, to interface to a chip soldered onto a board). I believe the part number would be HP E3417A. I already have the QFP160 adapter, but the chip I want to interface to is a QFP132. This adapter supposedly exists, but I've had no luck trying to find it through the usual channels. The second that I'm looking for, is if there's someone out there that owns and can dump the microcode ROMs from a DSD-4140 QBUS floppy controller. We've got a card here that's missing one of the ROMs, and we're also not sure if the ROMs are mixed up, so a dump of all 4 ROMs would be appreciated. They are 82S181, but they should read in any EPROM burner with a breadboard and some wiring to adapt the pinout. Burning them is another story, but we'll worry about that later... Here's a picture of the card in question: https://i.imgur.com/tzYjPYF.jpg And if anyone has one of these and is kind enough to dump it for us, there's also an 82S137 on the card that probably deserves a dump as well. Thanks, Joe Zatarski

7 years, 5 months

UK: FF : 2 x Sun Enterprise M4000

by silvercreekvalley＠yahoo.com

Hi all I have a couple of near identical Sun Enterprise M4000 servers fitted with SPARC64 VI 2.1GHz CPUs, 16GB and I think 2 x 146GB disks. I *think* these are working but have never powered them up. I purchased them surplus a year or so ago. Available free of charge to any Sun fans - these are collection only sorry. I?m not too far from Cambridge location wise in the UK. PM me if interested. First come first served. Thanks Ian

7 years, 5 months

eBay: RCA CDP1802

by anders.k.nelson＠gmail.com

IIRC someone on this list was asking for an 1802 some time ago... https://www.ebay.com/itm/CDP1802-CPU/132727125007 =] -- Anders Nelson +1 (517) 775-6129 www.erogear.com

7 years, 5 months

V6 cc needs hash before whitespace before first include?

by fritzm＠fritzm.org

So, I've been having some fun playing around with V6 Unix on my 11/45 a bit after that last repair. I've just been tripped up for a little over the fact that the C compiler barfs if there is whitespace/comentary before the first #include; the workaround seems to be to add a lone '#' at the beginning of the file. It took me a while to notice that this was done, for example, in all of the device driver sources. I found this curious. Anybody know what the story is there? --FritzM.

7 years, 5 months

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test-drb