stardot.org.uk

Here now!

Pretty busy already and it's only 10 to 5.

Cheers.

Phill.

At mcd in Didcot, for a coffee break, expect me between 3 and 4.

Cheers,

Phill.

daveejhitchins wrote: ↑

Wed Jan 22, 2020 7:12 am

This looks interesting - might invest!

Those heatguns can be useful for recovering chips from a board if you are scrapping it......e.g. hold board with chipside down, heat back....tap tap tap....



cheers.

Phill.

0xC0DE wrote: ↑

Sun Jan 05, 2020 11:13 pm

I'm interested! (and coming to ABUG)

Right just given the monitor a quick check and it still seems to be working fine.

So if you are still interested I'll bring it with me.

Cheers.

Phill.

Just my 2 penneth....

Hakko FX-888D for soldering
Aoyue 2702A for desolder / rework / hot air.
Use 60/40 Pb/Sn solder.

Cheers.

Phill.

tricky wrote: ↑

Sat Jan 11, 2020 5:53 pm

The misses (Carol) wants to see the railway museum "together", so I would be up for a York ABUG.

Lesley and I would prolly be up for a long weekend in York too....

Cheers.

Phill.

Does anyone that is coming to the meetup want a Compaq V710 CRT, SVGA monitor? It's a 17" FST tube that will do up to 1600x1200, specs available here : https://www.cnet.com/products/compaq-v710-crt-monitor-17-series/ Basically this is free of charge, if no one that is coming to the show wants it but...

Right Hotel booked!

I'll see you all later in the month....

Cheers.

Phill.

Right can confirm that the replacement of the LS75 with LS175 allows the AtoMMC to work with the WD65C02 CPU. One thing I did find however is that the WD CPU is even more fussy about the 8255 that it will work with than the NMOS version. In the end I ended up using an NEC D71055, which is compatible...

derek wrote: ↑

Mon Dec 09, 2019 12:34 am

Hi,

I have a chip extractor, I bought from Maplin Electronics, over 10 years ago. It never let me down, extracted PLCC, DIP chips with ease.

Yeah I have a couple of those, and agree works like a charm.

Cheers.

Phill.

sign me up please, as norma full table friday to sunday please.

Cheers,

Phill.

Looking good.

If you have a light box and some largish sheets of tracing or other semi transparent paper you could print out and compare easily to the Issue 5 board., To make sore all components are in the correct places.

Cheers,

Phill.

danielj wrote: ↑

Thu Nov 21, 2019 9:59 am

Turn up, set up, drink beer

Sounds like a good plan!

Phill.

Just on the offchance, does anyone have a 74LS374 (DIP) knocking about they could yoink along? I don't think I can order one in time and it's the only other thing I can think of that might need replacing in a repair job... I'm sure you know this but just incase.....if you are designing something ne...

Right with less than a week to go, anything anyone wants me to bring?

Already bringing Issue 5 Atom board & keyswitches for JudgeBeeb.

Arcadian, do you still want those C64s I offered you, if so shall I bring them?

Anything else anyone wants me to bring along?

Cheers.

Phill.

JudgeBeeb wrote: ↑

Fri Nov 15, 2019 10:34 am

Prime wrote: ↑

Fri Nov 15, 2019 9:19 am

I have a few desoldered from a beeb keyboard that I could bring along next weekend if you want.

That would be really helpful if you could. I believe that you also offered to bring a bare Atom PCB for me to look at...

Yep will bring that too.

Cheers.

Phill.

I am now looking into whether I can design a hybrid key-switch footprint that will accommodate both a modern Cherry MX (or compatible) key-switch and an original (Issue 5) Atom key-switch. I think it may just be possible, but it will be tight. It would be helpful if I could inspect and take measure...

@Phill, Do I see correct that the 74LS245 is mounted under the 6502 ? Assume this is direct on the board ? Yep that's correct, direct on board, with 6502 in a socket round it. And can you run the video board with just the 6845 and not the SAA5050 populated ? Not tried that, but if you only run the ...

bprosman wrote: ↑

Tue Nov 12, 2019 10:21 am

If you like I can assist to make them in Kicad if Phill is ok woth that.

Absolutely fine with that

Cheers.

Phill.

Kicad can load eagle files and make the gerbers :) The free version of Eagle should also be able to make gerbers from those files. Available here : ftp://ftp.cadsoft.de/eagle/program/ Any version after 6.x should be good, and the 6.x and 7.x versions don't require an Autodesk login. Cheers. Phill.

Good luck with that, hope it gets resolved though some of your comparisons come close to invoking Goodwin.......

Cheers,

Phill.

I think this is difficult to answer. As a developer it might be good to separate the project parts; each program might have its own working directory and so the files are spread over your local disk. But from the end-user perspective it might be handy to have it all in one repository because they d...

Hi all, This question is about my DragonMMC project but could also for example apply to the Electron / Atom boards I have made too. I've had a request to publish the source for DragonMMC (which I am intending to do). However since this project consists of 4 parts Schematic/Board layout**, Code for t...

I started playing around with trying to replace the INS8154 with a 6522 , by wiring up a 6522 to the appropriate signals from my System 1 board. The main take-away from the experiment was that it works, but the NMOS version of the 6522 doesn't source enough current to light a (calculator-style) LED...

Might also depend on which browser you are using. I've just done the following on the H page, on Firefox (both android and windows). Clicked next page twice, then clicked on "Hunchback" then back. On android it displayed the first page on windows it displayed page 3. However if I refreshed on window...

I normally pick a pinout that makes routing the PCB easy. This can be an iterative process, swapping pins (in the schematic) where necessary to avoid tracks crossing. Once the PCB is routed, I update the .ucf file with the final pinout, make the fitter can fit the design. This really means designin...

What I've have found made by Schroff are eye-wateringly expensive. I'm sure there are loads of these chucked in skips every day but I don't seem to be able to find any! Or I'm looking for the wrong thing... The one I built my system clone in I bought from a (ametur) Raido rally, for a pretty reason...

Oddly I have Adblock Plus on my windows install here, both it and FF are up to date and not seeing the behavior you are. Maybe it's an ABP setting that's causing it.

Cheers.

Phill.

daveejhitchins wrote: ↑

Fri Oct 04, 2019 6:48 am

Dito . . . I have one of Dave Moore’s folding tables that I used last year - so another spare table.

Is there anyone on here that doen't have something of Dave's

Cheers.

Phill.

The glitching while drawing is normal but if the drawing stops, the glitching must be gone and may not have corrupted the screen. The glitching is caused by sharing the databus between CPU and videoprocessor. What I have noticed with my various video addon boards, is that if you get screen corrupti...