test-drb

test-drb@ccmp.vtda.org

101090 discussions

by j＠ckrubin.us

This seems like some pretty cool stuff that might be useful in restoration work. Has anyone tried it? http://sugru.com/about

11 years, 6 months

Releasing Cover Off of Nashua RL02 Pack?

by leec2124＠gmail.com

I have a couple of Nashua brand third-party RL02 packs I'd like to remove the cover from, shown here: https://plus.google.com/photos/104239531634140817575/albums/610685195575310… The DEC RL02 packs have a slider release on the handle that one can use to remove the bottom cover before inserting the pack in the RL02 drive. However, the Nashua packs are missing this mechanism, and just lifting the handle does not release the bottom cover. Any hints on how to release the bottom cover off these packs? Thanks! Lee Courtney

11 years, 6 months

Maxtor XT-2190

by tshoppa＠wmata.com

Al writes: > On 1/19/15 10:43 AM, Tom Gardner wrote: >> FWIW, microstepping goes back to at least the CDC SMD of the mid-70s >> and even some stepper motor drives were microstepped. So there is no >> question the XT2190 can do it. > Obviously, though with the limited documentation it would take some reverse engineering of the Maxtor servo system to do it. There is no way provided to do it from the 34 pin edge connector that I can see. My belief (perhaps unfounded) always was that when a XT2190 begins emitting "squeals and beeps" it is because the MFM interface has asserted "recovery mode" and it is microstepping. Oh, 20 years I was abandoning XT2190's whenever I could! I dreaded walking into the lab to find the RD54's emitting squeaks and beeps indicating problems reading them. Are the squeals and beeps from the head positioner, or is there a separate piezo element for those? It was really loud and obvious and would not be surprised if there was a piezo beeper just for making them. Then again firmware in the drive may have known how to make the head positioner squeal too. Perhaps the squeals and beeps were not recovery mode but simply re-calibrating on track zero.

11 years, 6 months

HP tape drive novel repair

by marc.verdiell＠gmail.com

"Nice rack", as they say. I have an HP 7970E and was wondering what to put it into. That is the right solution... I've seen in pictures that HP also had some special desk-like looking furniture to put the early 7970's in, with a slanted panel in which the tape drive would go. Never seen one of these in the flesh. Marc >From: "Jay West" <jwest at classiccmp.org> >And if you want to follow the build of the 2000/Access IO-rack (which holds >tape, terminal controller and bulkhead, and disk controller subsystem): >http://www.ezwind.net/hp2000/IO-Rack/ >J

11 years, 6 months

Genrad/Futuredata and HP 64000/64700 documentation

by aek＠bitsavers.org

Thanks to Lyle mentioning Manuals Plus, I acquired all of the docs that they still had on the Futuredata 2300, which is now up under http://bitsavers.org/pdf/futuredata If anyone still has a 2300, 01, or 02 I would like to archive the prom and floppies from them. I've also been working through or rescanning at a higher resolution, 64100/110 docs. Information on the 64120/64000-UX system would be interesting to find. In addition I've made progress on the 64700A/B. There is very little information on the earlier 64700A on line. Surviving software for those emulators would be good to find. I did pick up a B3763-14604 CD from 1997 which appears to have the PC version of the software (and the flash files). We'll see what happens when I try to get a 68030 pod working on a 64700B that had a 68332 pod on it.

11 years, 6 months

Data Products 2230 manual - desperation....

by hachti＠hachti.de

Hi again, no one has that manual part one?!? I'm getting depressed :-( Nobody has an idea who could have it? Regards Philipp

11 years, 6 months

HP modern peripherals (was RE: HP tape drive novel repair

by jwest＠classiccmp.org

Mike wrote... ---- Someone needs to come up with the hardware equivalent of HPDrive so we don't need to dedicate an entire Windoze system just to emulate a drive. ---- To which I replied... ---- I am not 100% positive, but I think this was already done [snip] ---- Here is the magic: http://newton.freehostia.com/hp/ Note that this implementation uses a standard off the shelf dup reg board. That choice has major pluses, but the downside means you have to write a driver for any OS you want to use it with (RTE, HP2K, etc.). Maybe it's a starting point anyways.... J

11 years, 6 months

RF Shield for the A1200 Needed

by brain＠jbrain.com

ANyone have a part like this: "you might have the item i am looking for (from your vast collection of parts) which is the RF Shield for the A1200. Looking for only the UPPER or even UPPER/LOWER." I don't have Amiga parts, but would like to help this person.

11 years, 6 months

MEM11 Status Update (Guy Sotomayor)

by michael.99.thompson＠gmail.com

> > Date: Mon, 19 Jan 2015 21:27:59 -0800 > From: Guy Sotomayor <ggs at shiresoft.com> > To: cctalk at classiccmp.org > Subject: MEM11 Status Update > > As some of you know I've been working (on and off again) a > multi-function Unibus board that contains all of the more difficult > items to allow a PDP-11/20 to run Unix V1 entirely within the CPU > chassis. Other than the CPU and the RK11-D controller, everything else > will be on the MEM11 board. Here's the background on what the MEM11 is > and the current progress. > > What's on the board is the following: > > * Up to 124KW of non-volatile memory > * Console Emulator ROM > * 4 Boot ROMs selected from 32 images on the board > * 2 DL11 SLUs > * RF11 controller with non-volatile memory emulating 8 RS11 drives > * KE11 EAE > * KW11K > * KW11L > * KW11P > * KW11W > > > TTFN - Guy > > ****************** > I am working on a similar project for the Omnibus. I am connecting a Microsemi SmartFusion FPGA to the Omnibus, and doing the peripheral emulation in a combination of the FPGA and Linux running on the ARM Cortex-M3 hard core in the FPGA. Anything with timing restrictions goes in the FPGA. Everything else goes in Linux as a combination of a device driver and an application. For simplicity, I am starting with programmed I/O devices, with the paper tape reader/punch first. I should be able to add serial ports, printer ports, analog I/O, diskettes, card reader, and maybe DECtape. Later I will add data break (DMA) and add disks and mag tape. I am planning to keep the disk images in flash, load them into RAM and run from there, and save them back to flash if the processor is halted. The MI8E bootloader wiggles the same Omnibus signals as the front panel. I could have the FPGA do the same, and load any one of a selection of bootloaders. I am not adding memory, because a nice 32kW RAM board already exists. -- Michael Thompson

11 years, 6 months

Operating systems of the 1970s handling dates beyond the year 2000

by kspt.tor＠gmail.com

On 20 January 2015 at 17:38, David Brownlee <abs at absd.org> wrote: > IIRC there was a bug filed against VMS to the effect that dates past > 9999 were not supported. Have to be impressed by that belief in future > engineering :) There are, or were, some other forward-thinking people out there.. >from Wikipedia: "St. James's Gate Brewery (Irish: Gr?dlann Gheata Naomh S?amuis) is a brewery founded in 1759 in Dublin, Ireland, by Arthur Guinness. [..] The main product of the brewery is Guinness Draught.[..] Originally leased in 1759 to Arthur Guinness at ?45 per year for 9,000 years" (So although it looks like our decendants may run out of Guinness before VMS runs into date problems, no worries, they've since bought out the originally leased property. But good thinking still.) -Tor

11 years, 6 months

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