Search found 702 matches

by JudgeBeeb
Sat Oct 06, 2018 10:11 pm
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 331
Views: 12165

Re: RGB to HDMI using a Pi Zero and a small CPLD

Elminster wrote:
Sat Oct 06, 2018 12:57 pm
Always anuses me
:shock: :shock: :shock:
by JudgeBeeb
Tue Oct 02, 2018 4:11 pm
Forum: other vintage computer hardware, software and games
Topic: A micro-controller for the retro enthusiast
Replies: 11
Views: 441

Re: A micro-controller for the retro enthusiast

It's really cool, but I'm not sure I understand the practical advantage of making it a dedicated ASIC. Why not just use an FPGA/CPLD and load it with the core you desire to use? It's a 5V device; which makes it ideal for retro-enthusiasts (i.e. the very people it is targeting). If you used an FPGA ...
by JudgeBeeb
Tue Oct 02, 2018 7:08 am
Forum: general
Topic: Today I received.....
Replies: 4853
Views: 334254

Re: Today I received.....

for this old man , give me a hint where to buy things like this. bigger is better to see :) I got mine on eBay . This seller seems to be out of stock now. But there are quite a few people selling them on eBay. Andonstar make quite a few different digital microscopes some of which are much cheaper. ...
by JudgeBeeb
Mon Oct 01, 2018 5:55 pm
Forum: other vintage computer hardware, software and games
Topic: A micro-controller for the retro enthusiast
Replies: 11
Views: 441

Re: A micro-controller for the retro enthusiast

I am used to Kickstarter where it says at the top whether it is an ‘all or nothing project’, can’t see what this one is. If the project does not reach its funding goal, you WILL NOT be charged. (https://www.crowdsupply.com/guide/supporting-projects) But it has only taken $900 in last 4 weeks. Looks...
by JudgeBeeb
Fri Sep 28, 2018 12:58 pm
Forum: general
Topic: Today I received.....
Replies: 4853
Views: 334254

Re: Today I received.....

Hmm. Yes that one is half the price (not taking into account postage). You will have to give a progress update, and possibly take to ABUG South, I certianly wont be buying one before xmas. Having had a play with Jason's Binocular Microscope at Cambridge I have decided I need something. You need thi...
by JudgeBeeb
Fri Sep 28, 2018 12:42 pm
Forum: general
Topic: Today I received.....
Replies: 4853
Views: 334254

Re: Today I received.....

Which Microsocope did you get, I cant quite see? I got this . The image quality (as you can see) is pretty good. Construction is a bit rough around the edges. The Micro SD Card slot is particularly scary and I wouldn't be surprised if that fails at some stage soon. I have the Ekins one bookmarked f...
by JudgeBeeb
Fri Sep 28, 2018 12:27 pm
Forum: hardware
Topic: Music 5000 FPGA
Replies: 2
Views: 129

Re: Music 5000 FPGA

I had this running in a Papilio One. But that is not recommended as that board is not 5V tolerant and I'm lucky I didn't damage it.

You could try a GODIL, which is similar to (and from the same people as) the GOP. The GODIL has level shifters and is 5V tolerant.
by JudgeBeeb
Fri Sep 28, 2018 11:25 am
Forum: general
Topic: Today I received.....
Replies: 4853
Views: 334254

Re: Today I received.....

BTW, the image on the screen is showing off the RobC's remarkable soldering skills. Those are the 0.5mm pitch pins from the CPLD. =D>
by JudgeBeeb
Fri Sep 28, 2018 11:20 am
Forum: general
Topic: Today I received.....
Replies: 4853
Views: 334254

Re: Today I received.....

A digital microscope (in a vain attempt to improve my SMT soldering skills)...

IMG_0027.jpg

...and a silicone mat to stopping me burning the table when doing said soldering.

IMG_0029.jpg
by JudgeBeeb
Thu Sep 27, 2018 11:49 pm
Forum: hardware
Topic: My first (large) CPLD steps (XC9572)
Replies: 16
Views: 556

Re: My first (large) CPLD steps (XC9572)

You appear to be pretty much at the stage I am was wit VHDL a few weeks ago. First of all, have a look at this book: https://github.com/hamsternz/IntroToSpartanFPGABook/blob/master/IntroToSpartanFPGABook.pdf. It is probably the best VHDL tutorial out there. I certainly found it invaluable. Secondly,...
by JudgeBeeb
Wed Sep 26, 2018 10:21 am
Forum: off-topic
Topic: Desktop protection for electronics work
Replies: 13
Views: 501

Re: Desktop protection for electronics work

I've just ordered one of these.

Interesting description>
The pad may have dust or other appearance minor defect.It does not affect the function.
Please make sure that you don't care that.Thank you.
I shall report back.
by JudgeBeeb
Fri Sep 21, 2018 3:00 pm
Forum: development tools
Topic: Request membership of the Stardot organisation on GitHub here
Replies: 56
Views: 5316

Re: Request membership of the Stardot organisation on GitHub here

kieranhj wrote:
Fri Sep 21, 2018 2:21 pm
Invite sent. Check email or visit https://github.com/stardot.
Thanks.
by JudgeBeeb
Fri Sep 21, 2018 2:00 pm
Forum: development tools
Topic: Request membership of the Stardot organisation on GitHub here
Replies: 56
Views: 5316

Re: Request membership of the Stardot organisation on GitHub here

Please can I be added. My GitHub username is lazarusr.

Thanks
by JudgeBeeb
Mon Sep 17, 2018 4:05 pm
Forum: upcoming and recent events & exhibitions
Topic: Do we need more ABug meets? If so, where should they be?
Replies: 24
Views: 623

Re: Do we need more ABug meets? If so, where should they be?

The date for ABUG South in Hampshire is now fixed for 18 to January 2019. See this post: https://stardot.org.uk/forums/viewtopic.php?f=25&t=15668#p215010. As for meets in the North and/or around Bristol, as Elminster says, they need someone to organise them. Having organised one successful meet, I a...
by JudgeBeeb
Mon Sep 17, 2018 4:01 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG SOUTH 18 to 20 January 2019 (Hampshire) DATE CONFIRMED
Replies: 15
Views: 443

Re: ABUG SOUTH 18 to 20 January 2019 (Hampshire) DATE CONFIRMED

The general position seems to be that there are problems with March and April (and part of February). The only objection to January seems to be that I might snow. But we have done ABUGs in January before. I appreciate that there is a desire for there to be another ABUG North. However, at present, no...
by JudgeBeeb
Sat Sep 15, 2018 8:33 am
Forum: upcoming and recent events & exhibitions
Topic: Do we need more ABug meets? If so, where should they be?
Replies: 24
Views: 623

Re: Do we need more ABug meets? If so, where should they be?

Elminster wrote:
Sat Sep 15, 2018 8:31 am
Hmmm. What is the compensation package. £250k a year with free travel and a pension?
Sadly not. But, based on my experience, you do get all the Frazzles you can eat.
by JudgeBeeb
Thu Sep 13, 2018 5:15 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG SOUTH 18 to 20 January 2019 (Hampshire) DATE CONFIRMED
Replies: 15
Views: 443

Re: ABUG SOUTH 18 to 20 January 2019 (Hampshire) DISCUSSION THREAD

When it comes time to do a booking thread, can I suggest you do something to help people who are not on the forum 24/7? For example, pre-announce a booking window at least a day ahead; maybe open only half the places in the first booking window and then have another; maybe reserve some places for p...
by JudgeBeeb
Tue Sep 11, 2018 6:21 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG SOUTH 18 to 20 January 2019 (Hampshire) DATE CONFIRMED
Replies: 15
Views: 443

Re: ABUG SOUTH 18 to 20 January 2019 (Hampshire) DISCUSSION THREAD

danielj wrote:
Tue Sep 11, 2018 6:11 pm
March/April is very close to Wakefield, but not sure what the consideration is around a northern event at the mo?
Simon (sydney) used to organise the northern events, but as I understand matters, isn't able to do this at the moment. So someone needs to step up to the plate to take this on.
by JudgeBeeb
Tue Sep 11, 2018 6:09 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG SOUTH 18 to 20 January 2019 (Hampshire) DATE CONFIRMED
Replies: 15
Views: 443

ABUG SOUTH 18 to 20 January 2019 (Hampshire) DATE CONFIRMED

THIS IS NOT A BOOKING THREAD! I have been in touch with Chris at the Ely Hotel (https://www.oldenglishinns.co.uk/our-locations/the-ely-blackwater) and he has offered us three potential dates in January and February. Unfortunately, I am away for two of the weekends in question and I feel I need to b...
by JudgeBeeb
Sun Sep 09, 2018 4:19 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG Cambridge Sept 7th-9th 2018 BOOKING THREAD
Replies: 203
Views: 7446

Re: ABUG Cambridge Sept 7th-9th 2018 BOOKING THREAD

Another excellent ABUG. It was great to see some unfamiliar faces along with the regulars. Nice to see the Music 500/5000 receiving some love. Great selection of interesting projects and some rarities. Didn't expect I would ever some a custom modded Electron designed to book tables in a Flemish snoo...
by JudgeBeeb
Thu Sep 06, 2018 8:01 pm
Forum: off-topic
Topic: Desktop protection for electronics work
Replies: 13
Views: 501

Re: Desktop protection for electronics work

The cutting mats look cool, but (save for when you are actually cutting things) don't really serve any purpose. They neither provide any protection from static discharge nor any heat resistance. They will melt if they come into contact with anything at typical soldering temperatures. I actually have...
by JudgeBeeb
Thu Sep 06, 2018 6:20 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG Cambridge Sept 7th-9th 2018 BOOKING THREAD
Replies: 203
Views: 7446

Re: ABUG Cambridge Sept 7th-9th 2018 BOOKING THREAD

jgharston wrote:
Thu Sep 06, 2018 6:13 pm
Travelodge have emailed me warning me they have limited parking spaces. If I can't get a space is it ok to park overnight at the museum?
I have always parked at the Centre and taken a taxi back to my hotel. Never seemed to be a problem.
by JudgeBeeb
Thu Sep 06, 2018 5:03 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG Cambridge Sept 7th-9th 2018 BOOKING THREAD
Replies: 203
Views: 7446

Re: ABUG Cambridge Sept 7th-9th 2018 BOOKING THREAD

jbnbeeb wrote:
Thu Sep 06, 2018 4:14 pm
You're welcome to come along before then and take a look around the museum and/or help me and museum staff move equipment if you wish.
I am planning to get there early tomorrow and am more than happy to help with setting up.
by JudgeBeeb
Thu Sep 06, 2018 11:04 am
Forum: upcoming and recent events & exhibitions
Topic: ABUG Cambridge Sept 7th-9th 2018 BOOKING THREAD
Replies: 203
Views: 7446

Re: ABUG Cambridge Sept 7th-9th 2018 BOOKING THREAD

We usually stay until Jason has had enough and throws us out. This can be quite late; even past midnight. So do stop by if you arrive in the evening.

Quite a few people will be bringing mains extensions. But we can never have too many. So if you have room, do bring some along.
by JudgeBeeb
Wed Sep 05, 2018 12:54 pm
Forum: hardware
Topic: CPLD programming issue
Replies: 8
Views: 168

Re: CPLD programming issue

How do you power it out of the beeb to program it? I use a Bus Pirate to program the CPLD. This outputs 3V3 to power the CPLD when programming. Alternatively, as I have now discovered, I can disconnect the 3V3 supply from the Bus Pirate and program the CPLD direct from the Beeb (via the 3V3 voltage...
by JudgeBeeb
Wed Sep 05, 2018 11:53 am
Forum: hardware
Topic: CPLD programming issue
Replies: 8
Views: 168

Re: CPLD programming issue

With the beeb off is there actually 3.3v on the board ? or is voltage regulators internal diode back feeding the 5v rail of the beeb ? Good shout. With the Beeb off, the Beeb's 5V rail is reading 1.2V and the 3V3 rail to the CPLD is only 2.2V. With the Beeb on (and the 3V3 supply from the Bus Pirat...
by JudgeBeeb
Wed Sep 05, 2018 11:24 am
Forum: hardware
Topic: CPLD programming issue
Replies: 8
Views: 168

Re: CPLD programming issue

Where does your power come from during programming? Are you doing it with the Beeb off - maybe it is backfeeding into the beeb & dragging the programming power down? That makes sense. The CPLD is powered by 3V3 supplied by a voltage regulator. Is it possible to back feed to the 5V rail through the ...
by JudgeBeeb
Wed Sep 05, 2018 11:22 am
Forum: hardware
Topic: CPLD programming issue
Replies: 8
Views: 168

Re: CPLD programming issue

My guess would be noise on the TCK signal. Try adding some termination e.g. 100R to ground at the CPLD for TCK and or 100pF. No joy with that I'm afraid. However, further fiddling around reveals that it will program with the Beeb switched on. That, however, seems wrong to me. I am programming with ...
by JudgeBeeb
Wed Sep 05, 2018 10:51 am
Forum: hardware
Topic: CPLD programming issue
Replies: 8
Views: 168

CPLD programming issue

Here is the schematic of the ROM Board I am working on (and will be bringing to Cambridge). ROM Board.png The board plugs into the socket for IC1 (6502A) on the Model B (with the CPU piggy-backed onto the board). All is going well, except, for some reason, the CPLD will not program when the board is...