test-drb September 2007

test-drb@ccmp.vtda.org

220 participants
406 discussions

Looking for BA23 "back door" & MicroVAX II memory interconnect cable

by derschjo＠msu.edu

Hi all -- Title says it all -- I have a BA23 enclosure (soon to contain a MicroVAX II) that's missing the door that covers the card cage (not sure what the "official" name for this part is). Right now all the patch panels for the console and ethernet are left dangling and I'd love to have something to anchor them to :). I'm also looking for a memory interconnect cable to connect two M7609 memory boards to the CPU, but I can probably build one of those myself if push comes to shove. Anyone have these parts for sale/trade? Thanks in advance, - Josh

18 years

Cromemco Dazzler troubleshooting...

by wh.sudbrink＠verizon.net

Hi, I have a Dazzler board set that _almost_ works. Gray scale looks good and color looks OK, except that it's gray too. The shades of gray change when I flip the color bit at I/O address 0x0F and the red and green pots and the blue variable cap change the display when in color mode. The monitor I'm using is tested good with a color CCTV camera I have lying around. The geometry changes as expected with bit changes at 0x0F and the "dots" change as expected when the memory at the address assigned at 0x0E is modified. My guess is that something is wrong in the color burst (is that the right name?) circuit? Or is it possible that there is something different about the signal that a newer (manufactured Jan. 1993) color monitor wouldn't like? Unfortunately, the scan of the Dazzler manual on the Harte Technologies web site is not at a high enough resolution for the schematics to be read in detail. A better scan of the schematics would be greatly appreciated as would any other help, video signal generation is not my strong suit. Thanks, Bill No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.485 / Virus Database: 269.13.8/993 - Release Date: 9/6/2007 3:18 PM

18 years

free for pickup: VAX 11/750

by legalize＠xmission.com

I received this email today offering a VAX 11/750. I have no connection with the current owner. I have set the Reply-To for this message to the owner. Hopefully someone can rescue this. -- Richard =-=-=-=-=-=-= Original email We have a Digital VAX 11750 in storage that we need to find a home for. We have never used this as it was acquired by us when we purchased another company and was simply put into storage at that time. Do you have any idea if anyone would be interested in this? I would hate to see it hauled to the garbage if there is someone out there that would like to have it. Thank you for any help that you may provide. Regards, Lori G. Lee Quintek Technologies, Inc. 208-847-3618 208-847-3619 Fax llee at quintek.com www.quintek.com

18 years

Strange ADVENT error messages (OS/8)

by djg＠pdp8.net

>This disk image works perfectly (including ADVENT) on my laptop >running SIMH. > The way advent is saved it is dependant on exact conditions when it is saved. If hardware is changed or files are moved it will not work. If you follow the instructions in advent.dc you can resave it. For reference http://www.pdp8.net/pdp8cgi/os8_html/ADVENT.DC?act=file;fn=images/os8/diag-… An updated version is at http://www.rickmurphy.net/adventure.html

18 years

A frightening little bit of technology

by aek＠bitsavers.org

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=140155187682 How to make an unreliable medium even LESS reliable.

18 years

Wang 300 Calc

by silent700＠gmail.com

I've got a line on one of these old Nixie-tube calculators at a fair price. I know they used an outboard processor, making them little more than (very pretty) terminals to a central CPU. Are they of any use other than a doorstop or eye candy for the collection? (And don't say "harvest them for the Nixies!") -- jht

18 years

cctalk Digest, Vol 49, Issue 21

by mtapley＠swri.edu

At 10:10 -0500 9/7/07, cctalk-request at classiccmp.org wrote: >Hi there, > >What's the score with obtaining o/s installation disks for NeXT, >please? I have a slab here which I obtained a while back but which >(to my shame) I haven't gotten around to tinkering with. I believe it >has a fresh o/s install, but I'd feel more comfortable if I knew I >had all the facilities to do a reinstall if necessary. > >Is NeXTstep considered abandonware yet? Or should I be looking on >eBay for the latest version? > >Cheers, > >Stroller. Vendors I know about: http://www.blackholeinc.com/specials/blackhardware.shtml http://www.channelu.com/Turbo/NeXT/software.html Have dealt with the latter, he's a good guy. Don't know about the former. EBay is not a bad bet. For an early cube or slab, be sure you get the boot floppy with the media, or if not let me know and I (?) think I can write one for you. You'll also need the correct cable and a 512-byte SCSI CD drive; a FAQ that should help with that is pointed to from: http://www.museplan.com/projects/next-mac-faq/next-mac-faq.html Look down to the Q: Where can I find the main NextStep FAQ?, follow that link, go to section 5.6. Hope this helps. -- - Mark, 210-379-4635 ----------------------------------------------------------------------- Large Asteroids headed toward planets inhabited by beings that don't have technology adequate to stop them: Think of it as Evolution in Fast-Forward.

18 years

Compupro Concurrent DOS 4.1 bug report

by tpeters＠mixcom.com

C O M P U P R O PRODUCT ASSURANCE TECHNICAL BULLETIN BULLETIN #39 6/3/86 ***************************************************************** SUBJECT: PATCHES TO BDOS.CON TO CORRECT BUGS DEALING WITH DOS MEDIA ON CONCURRENT DOS 4.1 SYSTEMS PRODUCTS AFFECTED: ALL SYSTEMS USING CONCURRENT DOS 4.1 WITH DOS MEDIA PROBLEM: Two bugs have been identified by Mickey Singer from Personalized Programming in the BDOS.CON module from Digital Research. These two patches deal with a bug in the LRU buffering with DOS media, and a record locking bug in subdirectories in DOS media. These two patches have been recommended by Personalized Programming, but are not official Digital Research patches. CompuPro is not currently installing these patches in the 4.1 releases of Concurrent DOS, but recommends that they be installed if using record locking with DOS media. SOLUTION: The solution to this problem is to patch the BDOS.CON module and then regenerate the CCPM.SYS file from this patched module. The procedure for this patch is listed below: PATCH PROCEDURE: Make a back-up copy of BDOS.CON before using SID86.CMD to make the following changes. User entries are underlined. 0A>SID86 SID86 1.0 #rBDOS.CON START END XXXX:0000 XXXX:5AFF #XCS CS 0000 YYYY (Where YYYY=XXXX+8) DS 0000 YYYY SS WXYZ . #LA3A,A3A XXXX:0A3A JNZ 0A59 (LRU BUG) #aA3A XXXX:0A3A JNZ A9A XXXX:0A3C . #L2189,218F XXXX:2189 MOV AX,[0BB9] (RECORD LOCKING BUG) XXXX:218C MOV [0882,AX XXXX:218F MOV AX,[08E7] PRODUCT ASSURANCE TECHME39.DOC 6/3/86 PAGE 1 of 2 #a2189 XXXX:2189 CALL 1EF4 XXXX:218C JZ 21A2 XXXX:218E NOP XXXX:218F NOP XXXX:2190 NOP XXXX:2191 NOP XXXX:2192 . #L1EF4,1EF8 XXXX:1EF4 MOV BX,[BX] XXXX:1EF6 OR BX,BX XXXX:1EF8 JZ 1F08 #A1EF4 XXXX:1EF4 MOV AX,[0BB9] XXXX:1EF7 MOV [0882],AX XXXX:1EFA OR AX,AX XXXX:1EFC MOV AX,[08E7] XXXX:1EFF RET XXXX:1F00 . #wBDOS.CON #^C 0A> Save this new corrected copy of BDOS.CON so that the next time you GENCCPM a system, you will use the corrected module. At this time, you can regenerate your CCPM.SYS file as described in your documentation. Any questions concerning this Technical Bulletin should be addressed to: Product Assurance Department CompuPro/Viasyn Corporation 26538 Danti Court Hayward, CA 94545-3999 PRODUCT ASSURANCE TECHME39.DOC 6/3/86 PAGE 2 of 2 ----- 190. [Internet] "Ist es eine Leitungsst?rung? Ist es ein Coredump? Nein, es ist sendmail.cf." --Kristian K?hntopp --... ...-- -.. . -. ----. --.- --.- -... tpeters at nospam.mixcom.com (remove "nospam") N9QQB (amateur radio) "HEY YOU" (loud shouting) WEB: http://www.mixweb.com/tpeters 43? 7' 17.2" N by 88? 6' 28.9" W, Elevation 815', Grid Square EN53wc WAN/LAN/Telcom Analyst, Tech Writer, MCP, CCNA, Registered Linux User 385531

18 years

ST-412

by wdonzelli＠gmail.com

Anyone need an ST-412 HDD? I am pretty sure this one works. Cheap! Five bucks? Ten bucks? I think this should fit in a Flat Rate box, so shipping anywhere US should be about 9 or 10 bucks as well. -- Will

18 years

Reviving DEC RX01 power supply

by oldcpu2＠rogerwilco.org

woodelf said: > I don't want to see a 40 year nerd with no socks walking around ... > Give me a 20 year old <censored> with no <censored> on making a quick dash > instead. :) Ha! > Would that be a standard system 4 RX01's? I don't think so. This system appears to be circa 1977, and my oldest DEC handbook is from 1981, so doesn't even describe the old short, 4-slot BA-11M box that houses the CPU. But the handbook does describe a PDP-11/03 system with just the LSI-11 CPU, 8KW (16KB) and a single dual-drive RX01 storage subsystem. That would obviously be 'reasonably' the minimal system possible, I suppose. If you were a bit more willing to part with money, then you'd have an 11/23 CPU with one or even two RL01 5MB removable cartridge disks. Woohoo, huge step up in storage capacity! - Jared

18 years

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test-drb September 2007