Re: DEC Rainbow PC100-A

2016-01-17 Thread Warner Losh
Would love to help, but I have the PC100-B. The PC100-A board is somewhat different than the PC100-B, but not super different. Have you checked the diagnostics table in the technical reference to see what all LEDs lit means? I'd crack open my copy, but it is buried in boxes at the moment. Warner

Re: Non-baking cure for sticky shed?

2016-01-17 Thread Chuck Guzis
On 01/17/2016 02:00 PM, ben wrote: Why not just grab a few 8 tracks from the truck out back. ...Or fill those old QIC cartridges with some old acetate-base 1/4" open-reel audio tape? After all, it's all the same... --Chuck

Re: Non-baking cure for sticky shed?

2016-01-17 Thread ben
On 1/17/2016 2:32 PM, Chuck Guzis wrote: On 01/17/2016 01:03 PM, Adrian Stoness wrote: tape is tape all thats different is is the signal thats put on it. Nonsense-substrate, binder, magnetic characteristics vary widely between analog/audio and digital/computer tapes. Try taking some VHS tape

Re: Non-baking cure for sticky shed?

2016-01-17 Thread Chuck Guzis
On 01/17/2016 01:03 PM, Adrian Stoness wrote: tape is tape all thats different is is the signal thats put on it. Nonsense-substrate, binder, magnetic characteristics vary widely between analog/audio and digital/computer tapes. Try taking some VHS tape and using it in your 9-track open-reel d

RE: TU58 problems

2016-01-17 Thread tony duell
> > Yeah, but if the emulator doesn't work, > then you have another important clue. I _know_ there are problems on the TU58. It should detect the BOT and EOT markers and not let the tape run off the spool. It should never produce the waveform I am seeing at the output of the read comparator. No

Re: Non-baking cure for sticky shed?

2016-01-17 Thread Adrian Stoness
tape is tape all thats different is is the signal thats put on it. On Sun, Jan 17, 2016 at 1:50 PM, Chuck Guzis wrote: > If you're really interested in tape restoration, Richard Hess runs a > service professionally and has gobs of information. > > http://www.richardhess.com/tape/ > > Yes, I kno

Re: TU58 problems

2016-01-17 Thread j...@cimmeri.com
On 1/17/2016 1:40 PM, tony duell wrote: Incidentally, another reason I am not too keen on using an emulator is that I suspect there could well be logic faults in the CPU and if I am not careful I will just have a long list of unsolved problems, whch can be somewhat disheartenng... Yeah,

RE: TU58 problems

2016-01-17 Thread Robert Armstrong
What's the SD card based TU58 emulator that a couple of people mentioned? Is that just a Raspberry PI with linux and the existing TU58 emulator software, or is there something more purpose built? Bob

RE: TU58 problems

2016-01-17 Thread tony duell
> > What's the SD card based TU58 emulator that a couple of people mentioned? > Is that just a Raspberry PI with linux and the existing TU58 emulator > software, or is there something more purpose built? First hit on Google for 'TU58 Emulator' (no quotes) for me was : http://www.torok.info/co

Re: Non-baking cure for sticky shed?

2016-01-17 Thread Chuck Guzis
If you're really interested in tape restoration, Richard Hess runs a service professionally and has gobs of information. http://www.richardhess.com/tape/ Yes, I know he specializes in audio (analog) tape, but as Bob Pease used to say, "at some level, everything is analog". --Chuck

RE: AlphaStation 200 NVRAM Problem

2016-01-17 Thread Robert Jarratt
> > I don't know if it applies to the AlphaStation 200 but I have a PWS > > 500a > which > > defaults back to the AlphaBios firmware whenever the battery dies. > > After replacing the battery, I have to connect a keyboard and monitor > > and go through the AlphaBios menus to reset it to SRM. (If

RE: TU58 problems

2016-01-17 Thread tony duell
> > On a VAX, there is an application (named EXCHANGE if I remember > correctly) which reads and writes the first partition of any RT-11 disk Err, yes... This implies I have a working VAX. Until I repair ths TU58 and get it to load the CPU microcode, I don't. Sure... > If you have a PDP-11 syst

Re: TU58 problems

2016-01-17 Thread Jerome H. Fine
>tony duell wrote: While the TU-58 tape will not have an RT-11 file structure, you can at least read each raw block and display the contents: Actually I believe the VAX11/730 console tape is an RT11 file system (for all there is no PDP11 involved). On a VAX, there is an application (named E

P112 CP/M computer kits still available

2016-01-17 Thread David Griffith
FYI, I still have lots of P112 CP/M computer kits for sale. Please buy one or several. See http://661.org/p112/ -- David Griffith d...@661.org A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoyi

seeking test program for klh10 and panda display

2016-01-17 Thread David Griffith
In order to perfect my new USB-based Panda Display, I'd like to know what to expect on the display. Does anyone here have a pdp-10 program that will put a recognizable pattern on a parallel Panda Display? In particular, I'm looking for whatever is causing the action in this video to happen: