test-drb February 2013

test-drb@ccmp.vtda.org

185 participants
407 discussions

by c.murray.mccullough＠gmail.com

I was reading ?The Fire in the Valley? ? the story of how the computer became a mass-consumer product - and the wrestling of control by experimenters & hobbyists of computing technology from elites - the computer cognoscenti. This beginning age(1970s-80s) saw the rise of the technocrat, the nerd, the geek who revolutionized technology but who today are the computing elite and control our technocratic society for good or ill. Vintage computers, the beginning era, has been subsumed by a technology so rapidly advancing it threatens to overwhelm us yet I still look back with fondness and I hope we can revive some of that era?s experimentation if only to validate a true hacker ethic. Murray--

11 years, 10 months

FS: Macs ready to find homes

by slandon110＠gmail.com

I got the following PowerMacs ready to go A PowerMac 8500 with 48MB RAM and a 1GB HDD- Running Rhapsody Dev Release 2 with throw in more ram $75 shipped a PowerMac 9500 with 160MB RAM 1GB HDD running MacOS 7.6 $125 shipped a Quadra 650 with 16MB RAM and a 1GB HDD running MacOS 7.6- Will throw in some 32MB SIMMS $50 shipped 50 PIN SCSI Hard Drives, Any Size $15 dollars shipped each, Let me know what size you need Keep watching the list as I go through and prep more machines for sale.

11 years, 10 months

FW: [N8VEM-S2I:96] Version 0.3 S2I Firmware Update

by LYNCHAJ＠YAHOO.COM

Hi Update on the SCSI to IDE/SD project S2I. A lot of recent progress. Still looking for testers. Thanks! Andrew Lynch Hi Folks, I have just uploaded developmental firmware version 0.3. Here is what I remember of the changes made: * Support for either IDE or SD Card interface * Support for Pseudo-DMA (you MUST mod your prototype card for this to work) * Support for on-chip target device selection * Substantially improved handling of status codes and sense bytes * Substantial refactoring of protocol phases -- much cleaner and more modular Still looking for testers!!! -Wayne -- You received this message because you are subscribed to the Google Groups "N8VEM-S2I" group. To unsubscribe from this group and stop receiving emails from it, send an email to n8vem-s2i+unsubscribe at googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.

11 years, 10 months

CompacTape/DLT Media

by merrony＠gmail.com

I'm trying to restore a Data General MV/2500 (c.1989) which contains what DG referred to as a '130MB CTD'. It's actually a Fujistu M2451A. My question is: what is the latest generation of DLTs that I can use in the drive? Will DLTtape III cartridges work or do I have to try to find CompacTape IIs from somewhere? Thanks, Steve Restoration website: http://stephen.homedns.org/dg/

11 years, 10 months

T-series machines, was Re: OpenSXCE, was Re: Vintage era

by barythrin＠gmail.com

I think it depends which country you're in. I believe the quad core galaxy phone and tablet became dual core state side for some reason.

11 years, 10 months

Itch before scratching tape

by cclist＠sydex.com

I discovered two reels of tape--I assume that they're just different versions FORT045 and FORT046, as they have different dates (86 and 87) printed on them. Glenn has the ZIP of the TAP files. I can send copies to whoever wants them. Do let me know if either amounts to a hill of beans. --Chuck

11 years, 10 months

Using two RL02 drives on OS/8?

by charlesmorris800＠centurytel.net

The connections from the drive select outputs on the RL8A checked perfectly to the line receiver inputs on the RL logic board. While I appreciate Rick's taking the time to make me a selectable version of the RL02 oscillating seek.... he included a bug at no charge too ;) Specifically, the constant at 0230 (0100) selects the appropriate drive and resets it all right (0101 in AC). But - later on down the program, the SEEK (03) command is issued with another RLCB... however, the AC is forced to 0003 by the microprogrammed 7325. (As is probably apparent by now, the AC must have 0103 in it to select Drive 1). I edited the program to use a TAD 0231 and put the constant at 0231. So instead of the CLA CLL CML IAC RAL (load AC with 03 the hard way, an old-time DEC programmer's way to save one word when memory was a precious commodity) :) the AC now loads with 0103 and lo and behold, Drive 1 seeks merrily away! Restore the two constants to Drive 0 and THAT drive seeks. OK. However, all was not lost... during the couple of hours of chasing my tail wondering where the LSB of the drive select was going, I found that I had inserted the header into the RL logic board crookedly and bent two pins, one in the wrong hole and one shoved aside! :( Not only that, the line driver chip which provides the drive select signals had come from the factory with NO solder at all on its Vcc pin 16! =:^O Fixed that too. I think the OS/8 packs have been wiped out by now... various FAULT lights coming on, especially on the 2nd drive in the chain... going to build another system pack with VTserver which takes a good half-hour or more at 19200 baud. Hope the servo tracks are ok, otherwise I'll need to buy a couple of good packs! -Charles

11 years, 10 months

11/35 questions

by jack.rubin＠ameritech.net

I'm just getting to know my "new" 11/35 and have some questions about the current configuration. 1) Was the M981 (unibus jumper/terminator) unique to the 11/35(40)? It's not in the field guide but is mentioned in the Unibus Troubleshooting Manual. I'm assuming it provides near-end termination for the bus but it's curious that the termination portion is on the far side fo the jumper. The only other examples of the M981 that I've seen are in other 11/35 systems. 2) The system has 32KW of core - 8K in the chassis in an MM-11S system unit and 24K in a separate CMI Expandacore box. The MM-11L unit is a little strange in that it is composed of the expected G110 control module and G231 drive module but the core stack is an H215 (parity) rather than H214 (non-parity) unit. Does this matter? If it does, how would it affect operation? 3) This is a "vanilla" system with none of the available CPU options. It does, however, have an M7840 EAE board (KE11-B) which supports hardware multiply and divide. Does this make sense? 4) The system is in a BA11-DB(?) case - 10 1/2" high with H750 power supply on the right side (from the front of the chassis). As received, there are no covers for top, bottom or power supply. Anyone have any spares, or if not, pictures and/or measurements of the original parts? Shouldn't be too hard to fabricate but it would be nice to be as original as possible. OK - that's all for now! Thanks, Jack

11 years, 10 months

Itch before scratching tape

by cclist＠sydex.com

I was cleaning the head on one of my 9-track drives and used a tape that I've had around for while to check my work. It's labeled VAX-11 FORTRAN FORT046.A and seems to be backup tape for VAX FORTRAN 4.0. Total length is only about 750KB. Anyone interested in the contents before I scratch the tape? --Chuck

11 years, 10 months

SelectaDock I

by BHuntsman＠mail2.cu-portland.edu

Hi! I know they're not quite classic as some of the other systems discussed on this list, but anyone have a SelectaDock I in decent condition they'd like to part with? Thanks in advance! -Ben

11 years, 10 months

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test-drb February 2013