Pascal/8002 or other compilers for Tek 8002 dev. system?

Does anyone have information about (or a copy of) the Pascal Development Co. Pascal/8002 Universal Program Development Package, that ran on the Tektronix 8002 development system? The only thing I've found is a blurb in Computerworld 1979-08-13 p. 56. Alternatively, I'm very interested in any

FW: Non-DEC keyboard lookalikes (was: VT1xx stuff)

Oops, I forgot the list doesn't allow attachments! http://www.binarydinosaurs.co.uk/nonDECkeyboards.jpg A -- Adrian/Witchy Binary Dinosaurs creator/curator Www.binarydinosaurs.co.uk - the UK's biggest private home computer collection? -- Forwarded Message From: Adrian Graham

Re: "Retro Repair" key electronics skills?

On 05/10/2016 02:33 PM, Bill Sudbrink wrote: The other is that, as I said before, any ground connection has impedance (it's the inductance that is troublesome normally) so that points (say IC pins) that are shown as grounded may actually have a voltage difference between them. If I think about

Re: "Retro Repair" key electronics skills?

On Tue, 10 May 2016, dwight wrote: > In order to trouble shoot, one needs to know how it is suppose to work. > This often means studying schematics, data sheets and sometimes even > app-notes. Cool. I'm good on this. I love schematics when I can get them. I can't always figure out what I'm

Re: "Retro Repair" key electronics skills?

In order to trouble shoot, one needs to know how it is suppose to work. This often means studying schematics, data sheets and sometimes even app-notes. Avoid the replacing everything, until it starts working, type trouble shooting. As well as being a waste of time, it is more likely that you will

News about hpmuseum.net

The following was posted on hpmuseum.org this morning: *RE: Jon Johnston Passes * As an update to the sad news of Jon Johnston's death, I can advise that the HP museum and the hpmuseum.net website he built will be continued and maintained for the foreseeable future. Over the last 8 months I

Non-DEC keyboard lookalikes (was: VT1xx stuff)

Since I now have a couple of these and google is coming up blank-ish has anyone come across a VT keyboard, possibly from a Plessey PT100 style terminal, that is 99% VT100 in shape, colour and key layout? Even the 6mm jack plug though I know Apple used that too on the Lisa. I found a message

Re: VT1x1 keyboard (was Re: VT101 screen adjustment)

On Tue, May 10, 2016 at 3:26 PM, Adrian Graham wrote: > ... I had the VT131 one in bits on Sunday to fix the power switch which > had disintegrated in the same way my VT102 did. Yeah... I had that exact problem last year with a VT100. I'd say that of several DEC

RE: "Retro Repair" key electronics skills?

On Tue, 10 May 2016, tony duell wrote: > It's a very real problem, it's the main reason for decoupling capacitors > which provide a local source of power with a low impedance connection > (as they are so close to the IC). It seems like there is a lot of "fiddling" with those types issues and

RE: "Retro Repair" key electronics skills?

> > My father is a civil engineer. When I was a little > kid, he was in the US Air Force. We would frequently > go to the runway snack bar, get ice cream and watch > the B-52s do "touch-and-go" landing practice. The > plane's wings would "flap". It raised the hair on > the back of my neck.

RE: "Retro Repair" key electronics skills?

tony duell wrote: > Another of Don Vonada's laws is 'There is no such > thing as ground'. My father is a civil engineer. When I was a little kid, he was in the US Air Force. We would frequently go to the runway snack bar, get ice cream and watch the B-52s do "touch-and-go" landing practice.

VT1x1 keyboard (was Re: VT101 screen adjustment)

On 10/05/2016 16:14, "tony duell" wrote: > The keyboard itself is the same on the VT100, VT101, VT102, etc. The interface > circuit on the main logic board is much the same too, so the info in the > technical manual is of relevance. I'm reading that in moments of

RE: VT101 screen adjustment

[Your VT101 video board] > > It's the same board as the VT102, just checked. I can easily check the caps. >From what I remember there are at least 3 different video boards found in VT1xx's and any could appear in any model terminal. -tony

Re: VT101 screen adjustment

On 10/05/2016 16:10, "tony duell" wrote: > [VT101 with vertical linearity problems] > >> Yes indeed. Fortunately this one wielded under my trimmer and all is >> properly aligned now. All I need to do now is troubleshoot the keyboard >> circuit which I hope is the same

PDP-8 core memory board

FAYI: http://www.ebay.com/itm/262419353233 DEC H219a & G649 8K X 12 Core Memory Stack Noel

RE: "Retro Repair" key electronics skills?

> > Remember one of Don Vonada's laws 'Digital Circuits are made from > > Analogue Parts' > > That's an interesting saying. Maurice Wilkes (as in EDSAC) once told me 'A digital circuit is like a tame animal. An analogue circuit is like a wild animal. Every so often the digital circuit decides

RE: "Retro Repair" key electronics skills?

On Tue, 10 May 2016, tony duell wrote: > Remember one of Don Vonada's laws 'Digital Circuits are made from > Analogue Parts' That's an interesting saying. > So what appears to be a solid power or ground connection may have > different voltages along it. Those types of nuances and

RE: VT101 screen adjustment

[VT101 with vertical linearity problems] > Yes indeed. Fortunately this one wielded under my trimmer and all is > properly aligned now. All I need to do now is troubleshoot the keyboard > circuit which I hope is the same as the VT102... In general it is a bad idea to cure faults by adjustments.

RE: VT101 screen adjustment

> > Another good practice is to use several carbon-composition resistors in > > seri$ > > Actually, that makes me curious. Would a piece of pencil "lead" be a > workable substitute? I could imagine taking a drafting/art pencil lead > (the kind that's some 2-3 mm thick) with clip-leads, one on

RE: "Retro Repair" key electronics skills?

> > - Since I'm a coder, I understand boolean logic (which I hope would > > help with ICs). > > While it's an understandable point of view, especially for a coder, not > all ICs are digital logic - and even for those that are, understanding > non-digital-logic aspects of them can be useful. (I

Re: "Retro Repair" key electronics skills?

On Tue, 10 May 2016, Mouse wrote: > While it's an understandable point of view, especially for a coder, not > all ICs are digital logic - and even for those that are, understanding > non-digital-logic aspects of them can be useful. Right now I've started looking at the textbooks & lessons here:

Re: "Retro Repair" key electronics skills?

> - Since I'm a coder, I understand boolean logic (which I hope would > help with ICs). While it's an understandable point of view, especially for a coder, not all ICs are digital logic - and even for those that are, understanding non-digital-logic aspects of them can be useful. (I built an

Re: VT101 screen adjustment

> Another good practice is to use several carbon-composition resistors in seri$ Actually, that makes me curious. Would a piece of pencil "lead" be a workable substitute? I could imagine taking a drafting/art pencil lead (the kind that's some 2-3 mm thick) with clip-leads, one on each end.

Re: Memodyne M80 Digital Cassette Recorder

On May 10, 2016, at 1:12 AM, jwsmobile wrote: > IIRc there was a Silent 700 that had cassettes? Or was it the KSR version > of the 800 dot matrix TI printers? I actually got to use one of these or one similar for a while:

Re: Memodyne M80 Digital Cassette Recorder

On 5/9/2016 10:23 PM, Chuck Guzis wrote: On 05/09/2016 01:33 PM, Sean Caron wrote: I found some interesting information about it in the Appendices of this technical report: http://misclab.umeoce.maine.edu/education/VisibilityLab/reports/SIO_82-27.pdf Apparently the product was used in