test-drb

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101090 discussions

by binarydinosaurs＠gmail.com

Hi folks, ROM problems aside does anyone know of a way I can test the actual CRT? Last night I borrowed the screen from another PET just to see if I get a garbage pattern from the board I'm repairing, but this one stays similarly dark so I need to sanity check both of them. Back when I was fixing my broken TRS80s I could use the CRT from a B&W TV, is there anything oddball about the PET CRT that would stop me going the other way and putting the tube in one of my spare TVs? Ta! -- adrian/witchy Owner of Binary Dinosaurs, the UK's biggest home computer collection? www.binarydinosaurs.co.uk

10 years, 6 months

Scan of tape pile for Sun system

by jws＠jwsss.com

I recently got hands on what is supposed to be a Sun 4/260. INcluded are about 150 QIC tapes or so. I've gotten the fifty or so with labels scanned (labels on the tapes) so far and will make up a list soon. A lot of them have broken rubber bands, but the few that I could move by hand moved w/o indicating that the tape media was bad. I'm assuming all the rubber bands are shot. Anyway the labels make them seem worthwhile. Highlights are Ciprico Rimfire 3500 and Interphase drivers. There seems to be one set of Sunbin 3.0 tapes in the pile. So far the other release sets are incomplete. The second tape has 3 out of 5 tapes, but at least includes the boot tape. Also a driver for TTI vme bus (not sure what that is). AnDaTaco Optical disk drivers. Perfect Byte EXB-8200 SCSI driver. There are also compilers for C (Mercury), and for Fortran (Sun) . Also VXworks. https://drive.google.com/folderview?id=0B4AXJXpUCE-hRS1sSGlUOFIyNnc&usp=sha… Sorry for the bloated pdf. posted it for the impatient. You may have to download it to view it at all, 54mb right now. I will transcribe a full list of all of the tapes I have in ascii form in the next few days, but wanted to get opinions on whether this already exists somewhere else. Thanks Jim

10 years, 6 months

filtering?

by simski＠dds.nl

Hi All, it seems that some of my messages do not get through to the list. Is there a filter on this list of some sort? -- Met vriendelijke Groet, Simon Claessen drukknop.nl

10 years, 6 months

PROMs and EPROMs, specifically 2332/2532/2732

by witchy＠binarydinosaurs.co.uk

Hi folks, PET4032 repair continues with all ROMs, video RAM and dodgy sockets removed thanks to a hot air gun. Holes cleaned and I have new turned pin sockets for everything I've removed which I'll be fitting this afternoon. Since the ROMs came out OK I'm trying to dump them using my Pinmaster48 programmer, being from the 90s it doesn't read 2332/2532 PROMs but it WILL read a lot of variants of 2732 so I've made an adapter as found thanks to google and USENET: 2332 pin 18 to 2732 pin 21 (A11) 2332 pin 20 to 2732 pin 18 (Chip enable/Power Down) 2332 pin 21 to 2732 pins 20 and 24 via diodes with banding at the 2332 end (2332 Vpp) Wiring checks out and the diodes are aligned correctly so pins 20 and 24 don't interfere with each other, however the pinmaster continually gives me "continuity error on pin 20" Have I goofed somewhere? Cheers, -- Adrian/Witchy Binary Dinosaurs creator/curator Www.binarydinosaurs.co.uk - the UK's biggest private home computer collection?

10 years, 6 months

Model 152 PSU dummy loads - Re: NeXT Cube - powers on briefly then off again

by jnc＠mercury.lcs.mit.edu

> From: Ian Finder > so just on the safe side we'll cover some Engineering for Poets (or > Programmers) ROFL! Noel

10 years, 6 months

NeXT Cube - powers on briefly then off again

by toby＠telegraphics.com.au

Hi, After a few years I wanted to try my Cube with the soundbox/VGA splitter configuration for the first time. (I have the fading phosphor N4000A so have been keen to have an alternate video solution.) However, all is not well. Using the keyboard power button, the machine powers on for a couple of seconds, just long enough to see a NeXT logo and grey desktop on the VGA (yay!) but then powers itself off again. Any clues? Thanks in advance --Toby (not having a good classic computing week)

10 years, 6 months

US South: AS/400 system

by silent700＠gmail.com

Spotted on CL, not near it, no relation to seller, etc: http://jackson.craigslist.org/sys/5246929532.html AS/400 is a narrow niche in the hobby but a complete running system can be hard to come by. Also, terminals are nice. j

10 years, 6 months

Substituting DSHD for DSDD disks (or DS2D if you prefer)

by COURYHOUSE＠aol.com

Chuck good to know we probably need some - I do not think we have any good clean ones new here... will check.... Ed# In a message dated 10/26/2015 9:50:44 A.M. US Mountain Standard Time, cclist at sydex.com writes: On 10/26/2015 01:04 AM, COURYHOUSE at aol.com wrote: > and the first hp-150 drive set, the hp-9121, was single sided > double density SS/DD discs (270Kb). > > sure was glad when the 9122 came out! I supsect that the Sony SMC-70 may have been among the first systems to come out with the things. Fortunately, I still have several cartons (duplicator grade) of blank DSDD 3.5" mdedia. A few months ago, I gave away (FFS) about 1,000 of the things. I suspect that the the world's supply is far from exhausted. Lots of common word processors also used them (e.g. Brother). --Chuck

10 years, 6 months

Substituting DSHD for DSDD disks (or DS2D if you prefer)

by COURYHOUSE＠aol.com

and the first hp-150 drive set, the hp-9121, was single sided double density SS/DD discs (270Kb). sure was glad when the 9122 came out! Always looking for more HP-150 stuff for our display... any one have a monarch butterfly advertising poster? Ed# _www.smecc.org_ (http://www.smecc.org) In a message dated 10/26/2015 12:52:56 A.M. US Mountain Standard Tim, cclist at sydex.com writes: On 10/25/2015 11:12 PM, tony duell wrote: > Not always! The original Sony full-height drives (the 600rm ones) > have a disk-inserted sensor positioned exactly where that hole is. So > if you insert an HD disk the drive doesn't detect it. It is rumoured > this was deliberate (positioning of the HD hole) so that you couldn't > use the wrong disks and have reliability problems. Yes, the Sony OA-D32 drives. Single-sided 600 RPM. One *could* argue, that, given the data rate, it's already "high density" (of a sort). I worked out a BIOS for a Z80 CP/M system called a Preis around 1982, when the drive was pretty new. It was a luggable and had a hard disk option as well. I don't know whatever became of them--but I still have the BIOS listing in my files. I don't think that anyone had any thoughts about putting such a drive in with a controller that would do 1Mbps. Sony never alluded to it in their documentation. The battle of the "pocket floppies", IIRC, hadn't yet been settled in 1982. We could just as well have wound up with the Shugart/Dysan 3.25" floppy--or worse, the Hitachi 3" disks as used in the Amstrad machines. I've still got a couple of 3.5" ED drives, along with blank media--there was a trend that didn't last long... --Chuck

10 years, 6 months

Quantum Link (Q-Link)

by COURYHOUSE＠aol.com

so this show is closer to reality than I thought?? not knowing quantum link none of the other services seemed to fit... Ed# In a message dated 10/26/2015 7:54:38 A.M. US Mountain Standard Time, ethan at 757.org writes: > Originally I thought it was basing it on Comnet or Compuserve but after > reading these comments, I now think Quantum Link makes more sense. They > are doing a good job portraying the various personalities, especially the > disfunctional ones. In the episode where there is a room full of people and it's up on a projection screen -- I looked up the Quantum Link main page online and it seemed to match. http://toastytech.com/guis/c64gquantumlink.gif That thing -- Ethan O'Toole

10 years, 6 months

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