Re: Macintosh Plus: 31 years old this coming Monday

2017-01-15 5:12 GMT+01:00 Chris Hanson : > I met up with some friends at a coffee shop to get some data off a hard > drive that was given to one of them with an old Mac Plus. During the course > of this, we looked some things up, and learned that the Mac Plus was > released on January 16, 1986: Th

Re: What's the rarest or most unusual computer-related item do you own? [Tek 4132]

On Sun, Jan 15, 2017 at 10:20:56AM -0800, Al Kossow wrote: > > > On 1/15/17 10:02 AM, Jay West wrote: > > I'd have to say my HP-2000 systems that are running are the rarest that I'm > > aware of. > > So I fairly strongly suspect that my running HP-2000's are the only ones > > left, anywhere. >

Re: Caldisk 8" drive (also ebay warning)

On 1/15/2017 11:16 PM, jim stephens wrote: I'm not sure I've heard of Caldisk, though it was in Anaheim apparently. Maybe a Calcomp brand or spinoff? Here is an ad also for the Matchdisk operation who pasted their info all over the drive. https://books.google.com/books?id=iD4EMBAJ&pg=

Caldisk 8" drive (also ebay warning)

I'm not sure I've heard of Caldisk, though it was in Anaheim apparently. Maybe a Calcomp brand or spinoff? Here is an ad also for the Matchdisk operation who pasted their info all over the drive. https://books.google.com/books?id=iD4EMBAJ&pg=PT33&lpg=PT33&dq=caldisk+142m&source=bl&ots=2U

Re: Microscope for Soldering and Inspection Work

On 01/15/2017 03:51 PM, Jon Elson wrote: > Also, flux smoke gets all over the lenses. That is one downside on > my Olympus, the bottom is not sealed. I made up some card stock and > glued it in place to try to prevent the smoke getting inside. But, > it still gets on the lenses requiring period

Re: What's the rarest or most unusual computer-related item do you own?

On 1/15/17 7:20 PM, Alan Perry wrote: > > If I had something rare, I would donate it to an appropriate museum. Good luck with that. I tried with my rarest, and they claimed they already had one. Someone mentioned Vectrex, which isn't all that rare. However, my one-off homebrew S-100 Vectrex inte

DEC G500 Module

We are still fiddling with the TU56 drive on the PDP-12 at the RICM. We followed the head skew procedure, but it calls for a G500 module to amplify the signals from the tape head. We cobbled together a pair if G888 modules as the amplifier, and it worked OK. The G500 schematics are in the skew proc

Re: 8085 IO ports

On 01/15/2017 01:06 PM, Chuck Guzis wrote: > On 01/15/2017 09:37 AM, Glen Slick wrote: > > >> In the EPROM binary dump you posted I see code that is doing IN and >> OUT accesses to the following port locations... > I've seen that technique used to address a device, such as off-chip > EEPROM--basica

Re: 8085 IO ports

On 01/15/2017 08:02 AM, Adrian Graham wrote: > On 15/01/2017 03:04, "allison" wrote: > >> On 01/14/2017 08:18 PM, dwight wrote: >>> If it is not doing I/O and waiting for something, it is likely waiting for >>> an >>> interrupt. >>> >>> Dwight > > Apologies for all the daft sounding questions (th

Re: What's the rarest or most unusual computer-related item do you own? [Tek 4132]

On 01/15/2017 11:23 AM, Al Kossow wrote: > > On 1/14/17 7:20 PM, allison wrote: > >> If the 32016 had a second generation > It had several generations. The 32532 saw some use in laser printers. > > https://en.wikipedia.org/wiki/NS320xx > > > I know but effectively they have been few and limited, an

Re: What's the rarest or most unusual computer-related item do you own?

I have a Sun VME to Pixar interface board somewhere in my collection. -- Michael Thompson

Re: What's the rarest or most unusual computer-related item do you own?

My most unusual computer-related item is an Axil 320 (SPARCstation 20 clone laid out like a SS10 on the inside) running OPENSTEP 4.2. But it would be nicer if OPENSTEP made use of the second processor module in it. Or the receipt for the very last magneto-optical cartridges for the NeXT that

Re: What's the rarest or most unusual computer-related item do you own? [Tek 4132]

On 01/15/2017 10:20 AM, Al Kossow wrote: On 1/14/17 6:29 PM, Jon Elson wrote: I got versions of Genix and Xenix with it. Do you still have Xenix? I don't think so, but I'll look a bit more. I may have overwritten those with Genix. I do have the 24 or so Genix install disks. These are 5.25"

Re: Microscope for Soldering and Inspection Work

On 01/14/2017 01:12 PM, couryho...@aol.com wrote: Many other stereo microscopes also have this provision to add a clear filter or aux booster or de-creaser in power lens. always best to keep active optics covered with some protection to save from solder splash, sharp things stick

Re: dual-wide dec extender cards

On 1/15/2017 2:30 PM, Glen Slick wrote: Was the point there that some other extender options have connectors that are not as deep, and therefore less desirable? I have a 6-DE-11 dual width, dual height (Height 8.43" Width 5.2") extender from Douglas Electronics that are available for $40 with th

Re: dual-wide dec extender cards

On Sun, Jan 15, 2017 at 11:52 AM, Al Kossow wrote: > fyi > > more common, but it has the correct depth connector on it > > thought I'd post since the description isn't at all obvious what it is > > http://www.ebay.com/itm/361530436227 > http://www.ebay.com/itm/361530436651 > Was the point there t

Re: Need serial cabe for pdp 11/34 M7856

On Sun, Jan 15, 2017 at 1:56 PM, Noel Chiappa wrote: > > i need a cable that is wired for serial. > > The EIA serial cables that plug into the Berg connectors are pretty much > unobtainium. There's' the BC05C and the BC01V... it's true that it's now hard to get a vendor to list prices, but th

dual-wide dec extender cards

fyi more common, but it has the correct depth connector on it thought I'd post since the description isn't at all obvious what it is http://www.ebay.com/itm/361530436227 http://www.ebay.com/itm/361530436651

Re: Need serial cabe for pdp 11/34 M7856

On Sun, Jan 15, 2017 at 6:56 PM, Noel Chiappa wrote: > > From: Devin > > > i need a cable that is wired for serial. > > You mean EIA, right? (They're both serial... :-) > > > If no one has the cable, i could make one myself > > The EIA serial cables that plug into the Berg connectors a

Re: Macintosh Plus: 31 years old this coming Monday

On 01/14/2017 10:12 PM, Chris Hanson wrote: Maybe I’ll take some time out on Monday to finally fit mine with the replacement analog board that I’ve acquired, so I can enjoy that beautiful bluish-white phosphor glow once again. I have a couple - but only one mouse, and no keyboards, which is a b

Re: Need serial cabe for pdp 11/34 M7856

> From: Devin > i need a cable that is wired for serial. You mean EIA, right? (They're both serial... :-) > If no one has the cable, i could make one myself The EIA serial cables that plug into the Berg connectors are pretty much unobtainium. I have a couple that came with an 11/04

Re: Need serial cabe for pdp 11/34 M7856

On Sun, Jan 15, 2017 at 6:47 PM, Don North wrote: > Or here is a slightly different approach that I now use. I made up this PCB: > > https://oshpark.com/shared_projects/uTMf3v08 (price is $18 for 3 boards > from OSHpark) > > that adapts a standard 40p IDE cable to a 9pin serial connector (M or F

Re: Need serial cabe for pdp 11/34 M7856

On 1/15/2017 10:24 AM, Tony Duell wrote: On Sun, Jan 15, 2017 at 5:47 PM, Devin wrote: The cable that came with my 11/34 is for current loop, i need a cable that is wired for serial. If no one has the cable, i could make one myself, i just need the 40 pin connector that goes on the cable. I hav

Re: Need serial cabe for pdp 11/34 M7856

On Sun, Jan 15, 2017 at 5:47 PM, Devin wrote: > The cable that came with my 11/34 is for current loop, i need a cable that > is wired for serial. If no one has the cable, i could make one myself, i > just need the 40 pin connector that goes on the cable. I have been unable to > find the connector.

Re: What's the rarest or most unusual computer-related item do you own? [Tek 4132]

On 1/15/17 10:02 AM, Jay West wrote: > I'd have to say my HP-2000 systems that are running are the rarest that I'm > aware of. > So I fairly strongly suspect that my running HP-2000's are the only ones > left, anywhere. probably true. http://www.computerhistory.org/collections/catalog/1026828

Re: 8085 IO ports

On 01/15/2017 09:37 AM, Glen Slick wrote: > In the EPROM binary dump you posted I see code that is doing IN and > OUT accesses to the following port locations... I've seen that technique used to address a device, such as off-chip EEPROM--basically, rather than employ a separate latch for the add

Re: What's the rarest or most unusual computer-related item do you own? [Tek 4132]

> On 15 Jan 2017, at 17:23 , Al Kossow wrote: > > > > On 1/14/17 7:20 PM, allison wrote: > >> If the 32016 had a second generation > > It had several generations. The 32532 saw some use in laser printers. > > https://en.wikipedia.org/wiki/NS320xx The

RE: What's the rarest or most unusual computer-related item do you own? [Tek 4132]

I'd have to say my HP-2000 systems that are running are the rarest that I'm aware of. I know of a few folks who have various bits and pieces towards assembling one, but not complete. I know two collectors who (each) have most if not all of the parts, but the systems are far from operational and

Need serial cabe for pdp 11/34 M7856

The cable that came with my 11/34 is for current loop, i need a cable that is wired for serial. If no one has the cable, i could make one myself, i just need the 40 pin connector that goes on the cable. I have been unable to find the connector. Oddly ebay appears to have the side of the connect

Re: 8085 IO ports

On Sat, Jan 14, 2017 at 12:01 PM, Adrian Graham wrote: > Hi folks, > > STC Executel fun continues and I'm at the point where I'm fairly sure code > is running but it's stuck in a tight loop waiting for something to happen. > > The 8085A reference tells me a non-memory I/O is signalled by IO/M goin

Re: What's the rarest or most unusual software item do you own?

On Thu, Jan 12, 2017 at 7:02 AM, Lars Brinkhoff wrote: > What about software? I've just realised I do have something that might be relevant here. There was a British research satellite called UK6. Various universities made experiments to fly on it. And there was a test unit which provided the sa

Re: What's the rarest or most unusual computer-related item do you own?

Well, after reading what other people have, my contribution seems pretty piddly, but here it is. The rarest hardware I have is probably a Sun SPARCstation Voyager or a Tadpole 3GX - I'm not sure which is rarer (and those are just my perception of rarity, which could be wrong). It's possible one o

Re: Kenbaks in Nova Scotia

Original message From: jos Date: 2017-01-15 12:33 AM (GMT-08:00) To: "General Discussion: On-Topic and Off-Topic Posts" Subject: Re: Kenbaks in Nova Scotia >   And how a tiny museum in a tiny province could afford them.  Kind of a head >scratcher! They were not alwa

Re: EWD37

On 01/15/2017 07:35 AM, Paul Koning wrote: > Dijkstra's objection wasn't to linkage via a register -- after all, > his earlier machine (the Electrologica X1) does that too, or more > precisely via one of 16 low core locations. The problem with the > 1620 is that the link register is not readable

Re: What's the rarest or most unusual computer-related item do you own? [Tek 4132]

On 1/14/17 7:20 PM, allison wrote: > If the 32016 had a second generation It had several generations. The 32532 saw some use in laser printers. https://en.wikipedia.org/wiki/NS320xx

Re: DG Nova extender board on eBay

you're welcome. extender cards don't come up very often On 1/14/17 7:01 PM, jim stephens wrote: > > > On 1/14/2017 12:33 PM, Al Kossow wrote: >> fyi >> www.ebay.com/itm/252724692683 > Thanks! > Jim

Re: What's the rarest or most unusual computer-related item do you own? [Tek 4132]

On 1/14/17 6:29 PM, Jon Elson wrote: > > I got versions of Genix and Xenix with it. Do you still have Xenix? That reminds me I need to dig out the Genix sources I have. There were a couple of companies that made PC cards with the chipset on it, and once company that made a Q-Bus co-processor

Re: What's the rarest or most unusual computer-related item do you own?

Bob Rosenbloom or Ian Finder might have one. I forgot to inventory the ROMpacks in the 4054 that I sent to Ian and Bob has a pretty big collection of 405x stuff. On 1/14/17 3:49 PM, Rick Bensene wrote: > I have a 4907 single 8" floppy disk drive for my 4051, and it works great, > but I don't have

Re: What's the rarest or most unusual computer-related item do you own? [Tek 4132]

I dug out the boards that I have to dump the eproms, and a while back put up what I had for schematics on bitsavers. On 1/14/17 3:40 PM, Rick Bensene wrote: > > >> From: "Rick Bensene" >>> - A Tektronix 4132 Unix workstation using a National 32016 CPU and a >>> 4.2bsd port called UTek >>> >

Re: EWD37

> On Jan 14, 2017, at 3:29 PM, Cameron Kaiser wrote: > >> Oh my! You couldn't have a subroutine that called another >> subroutine, using their surroutine call/return instructions! I never >> knew that! > > Strictly speaking, that would still be true of any CPU that uses a link > register inst

Re: 8085 IO ports

On Sun, Jan 15, 2017 at 1:02 PM, Adrian Graham wrote: > On 15/01/2017 03:04, "allison" wrote: > >> On 01/14/2017 08:18 PM, dwight wrote: >>> If it is not doing I/O and waiting for something, it is likely waiting for >>> an >>> interrupt. >>> >>> Dwight But do you know it''s not doing I/O. OK IO

Re: 8085 IO ports

On 15/01/2017 03:04, "allison" wrote: > On 01/14/2017 08:18 PM, dwight wrote: >> If it is not doing I/O and waiting for something, it is likely waiting for an >> interrupt. >> >> Dwight Apologies for all the daft sounding questions (this goes to Dwight, Tony and Chuck too) but historically I'm

Re: PAL video in the states

On Fri, Jan 13, 2017 at 11:18:25AM -0500, Paul Koning wrote: [...] > Just yesterday I was looking at roughly the opposite question: how to make a > DVD (in the USA) that my sister in Holland would be able to use. [...] The Dutch are impressively frugal so it's possible she has managed to find a ra

Re: What's the rarest or most unusual computer-related item do you own? [Tek 4132]

On 01/14/2017 09:29 PM, Jon Elson wrote: > > On 01/14/2017 05:40 PM, Rick Bensene wrote: >> >>> From: "Rick Bensene" - A Tektronix 4132 Unix workstation using a National 32016 CPU and a 4.2bsd port called UTek >> Jon wrote: >> >>> Gee, how does it perform? I built a clone of a Log

Re: 8085 IO ports

On 01/14/2017 08:18 PM, dwight wrote: > If it is not doing I/O and waiting for something, it is likely waiting for an > interrupt. > > Dwight > > > > From: cctalk on behalf of Adrian Graham > > Sent: Saturday, January 14, 2017 12:01:32 PM > To: Discussion: On-To

Re: Kenbaks in Nova Scotia

And how a tiny museum in a tiny province could afford them. Kind of a head scratcher! They were not always 30K+... I visited the museum & talked to the (very friendly ) owner. While this museum in itself may not warrant a trip to Nova Scotia, the area is well worth a visit. Jos

Kenbaks in Nova Scotia

Never know what you'll find googling around.  I'm kind of curious about this.   There is a 'museum' (barely.. they have less stuff than I do) in Nova Scotia that has 7 Kenbak-1s.  I read how they got them.. from a gentleman in South Carolina.  In his own write up, he said he would only sell them