[cctalk] Re: RD54 Maxtor XT-2190 w/one long meep
Chris Zach via cctalk writes: > It is quite possible to put a touch of watch oil on the shaft of an > older drive (without opening it) to quiet the bearings and > re-libricate the grease. I'm still running RD54's and RD53's without > much of an issue, firing them up every few months seems to keep them > happy. All the RD53s that I've owned have died, but every RD54 is still working. One of them has developed a bearing whine that occurs for a few seconds once every couple of hours, though, and I'd like to try oiling the lower bearing. However, the circuit board is in the way. Do you have experience with taking that off to get at the end of the shaft? Are there gotchas under there, like flimsy connectors that will break when you try to lift the board? -tih -- Most people who graduate with CS degrees don't understand the significance of Lisp. Lisp is the most important idea in computer science. --Alan Kay
[cctalk] Re: Vmebus
Bill Degnan via cctalk writes: > Anyone have a VMEbus system they use at least occasionally? If so, what > make/model/config? I have a couple of old Stride Micro systems, a 440 and a 460, that get turned on very occasionally. They run UniStride 2.1, which is based on SVR2, if memory serves. Nice 68010-based machines, interesting software architecture, with an advanced BIOS that supports several operating systems, and can even run multiple OS-es simultaneously. -tih -- Most people who graduate with CS degrees don't understand the significance of Lisp. Lisp is the most important idea in computer science. --Alan Kay
[cctalk] Re: PDP 11/34 or 11/04 front panel question
Tom Hunter via cctalk writes: > Any suggestions, advice or tips? Have you considered simply using double sided tape? -tih -- Most people who graduate with CS degrees don't understand the significance of Lisp. Lisp is the most important idea in computer science. --Alan Kay
[cctalk] Re: TI 960
James B DiGriz via cctalk writes: > Oh, I've always been interested in them, just that opportunity and > means never converged when I wasn't distracted by other things, and > then they became yesterday's news and hard to find. If yours turn up, > I'm sure I wouldn't be the only one who'd want some, either. I know what you mean. Transputer stuff does turn up from time to time, though. I play with Perihelion's Helios on a Transputer array myself - here's the story of how I finally got started (with some useful links to more Transputer information): https://hamartun.priv.no/b004.html -tih -- Most people who graduate with CS degrees don't understand the significance of Lisp. Lisp is the most important idea in computer science. --Alan Kay
[cctalk] Re: Getting floppy images to/from real floppy disks.
Fred Cisin via cctalk writes: > Data will expand to fill slightly more than all available storage > capacity.- Boyle's law "The steady state of disks is full." --Ken Thompson -tih -- Most people who graduate with CS degrees don't understand the significance of Lisp. Lisp is the most important idea in computer science. --Alan Kay
[cctalk] Re: Getting floppy images to/from real floppy disks.
Fred Cisin via cctalk writes: > Unfortunately, the ability to handle single-density (FM) reading and > writing correctly IS one that some machines can; some can't. For what it's worth, the Adaptec AHA-1542B SCSI controller contains a fully capable floppy interface as per the original IBM specification. -tih -- Most people who graduate with CS degrees don't understand the significance of Lisp. Lisp is the most important idea in computer science. --Alan Kay
Re: TK50, was: Re: Ultrix Tape: Block Size?
I wrote: > I'll have to open up my PDP-11/83 tonight. Its TK50 will stream while > writing, as long as what's being written can be read reasonably fast > from (RQDX3/RD54) disk. The TQK controller is sitting right up at the > top end of the Q-bus, to get high priority -- but I don't know if it's a > TQK70. I've really just assumed it's a TQK50 without thinking too much > about it... Turns out it's an M7546; a TQK50. I guess I'll get streaming writes more often with an M7559 (TQK70) than I do at the moment, then. :) -tih -- Most people who graduate with CS degrees don't understand the significance of Lisp. Lisp is the most important idea in computer science. --Alan Kay
Re: TK50, was: Re: Ultrix Tape: Block Size?
emanuel stiebler writes: > TK50 on QBUS with an TQK50 controller which really didn't stream to often > TK50 on QBUS with an TQK70 controller, which doubled the memory of the > TQK50, which was capable of streaming ... Now *that* I wasn't aware of! Thanks! I'll have to open up my PDP-11/83 tonight. Its TK50 will stream while writing, as long as what's being written can be read reasonably fast from (RQDX3/RD54) disk. The TQK controller is sitting right up at the top end of the Q-bus, to get high priority -- but I don't know if it's a TQK70. I've really just assumed it's a TQK50 without thinking too much about it... -tih -- Most people who graduate with CS degrees don't understand the significance of Lisp. Lisp is the most important idea in computer science. --Alan Kay
