Search found 2855 matches

by roland
Thu Jun 14, 2018 8:37 pm
Forum: software: other
Topic: Using BBC BASIC on a Homebrew Computer
Replies: 9
Views: 385

Re: Using BBC BASIC on a Homebrew Computer

You can start by modifying the Atom BBC MOS rom as this contains most functions (api calls)!for running BBC Basic. I was looking for the source but I could not find it. With a decent mod rom you can run BBC Bacis with no modifications at all.

That is the way Acorn implemented BBC Bacic on the Atom.
by roland
Wed Jun 13, 2018 12:48 pm
Forum: acorn atom
Topic: Atom 2k18 ?
Replies: 19
Views: 503

Re: Atom 2k18 ?

If you are going to source parts like this, it may well be worth letting your 'customers' know that they are recycled parts, just incase there are any problems with them. I will test them before shipping, as I program them in an already build Atom. So I'm sure that they are working when they leave ...
by roland
Wed Jun 13, 2018 12:16 pm
Forum: stardot.org.uk
Topic: Has Stardot been purged from Google search?
Replies: 14
Views: 269

Re: Has Stardot been purged from Google search?

I think they are already indexing again: https://www.google.com/search?q=atom+2k18
by roland
Wed Jun 13, 2018 12:09 pm
Forum: acorn atom
Topic: Atom 2k18 ?
Replies: 19
Views: 503

Re: Atom 2k18 ?

Thanks for your feedback. I'm seriously considering this option. After all, the Atom is not a really life-saving or life-supporting device. Although I'd probably die without it :lol:
by roland
Tue Jun 12, 2018 10:00 pm
Forum: acorn atom
Topic: What is a good PSU for a 5V modded Atom?
Replies: 4
Views: 77

Re: What is a good PSU for a 5V modded Atom?

I also use (and advice) a 5V 2A usb adapter, bought in a local store.
by roland
Tue Jun 12, 2018 9:27 pm
Forum: acorn atom
Topic: Atom 2k18 ?
Replies: 19
Views: 503

Re: Atom 2k18 ?

Today I have played a bit with KiCad to make an adapter for the CPLD's but whatever I try, it's always too big. I really dislike the surface mounted devices because it's difficult to solder them and also difficult for me to program them for other people who will build an Atom but do not have access ...
by roland
Mon Jun 11, 2018 7:10 am
Forum: acorn atom
Topic: Atom 2k18 ?
Replies: 19
Views: 503

Re: Atom 2k18 ?

hoglet wrote:
Mon Jun 11, 2018 5:31 am
Have you decided which board to use?
Not yet, the XC6SLX9-board is cheaper and can route the audio and video signals over the PCB which makes it a bit easier. I also have to look at the physical space that both devices need and how they fit on the PCB.
by roland
Sun Jun 10, 2018 7:31 pm
Forum: acorn atom
Topic: Atom 2k18 ?
Replies: 19
Views: 503

Re: Atom 2k18 ?

There are lots of these available, e.g. https://www.ebay.co.uk/itm/Xilinx-FPGA-Spartan-6-XC6SLX9-Core-Board/111640406811 (This is the board the Duncan referred to in the post above, that we are now using with ICE-T65) Can the video and audio signals that are now routed with a separate cable from th...
by roland
Sun Jun 10, 2018 7:24 pm
Forum: acorn atom
Topic: Atom 2k18 ?
Replies: 19
Views: 503

Re: Atom 2k18 ?

There are some adapters available, however IMHO they are quite expensive and you still have to solder them. The advantage of such an adapter is that you can easily swap the CPLD's: http://www.epboard.com/eproducts/parts/EPL-0044.htm The FPGA does much more than only the video, it has also SID audio,...
by roland
Tue Jun 05, 2018 2:22 pm
Forum: acorn atom
Topic: Atom 2k18 ?
Replies: 19
Views: 503

Re: Atom 2k18 ?

Are you thinking then that this would be incremental changes to the current design? I was wondering if it would be worth going for a 3.3V only design. I prefer an incremental change to the current design, however I'm not unwilling to use the XC6SLX9 Core Board if we can use that. It's only about ha...
by roland
Tue Jun 05, 2018 11:08 am
Forum: acorn atom
Topic: Atom 2k18 ?
Replies: 19
Views: 503

Atom 2k18 ?

Since I still receive request for an updated Atom 2k15 board I'm starting to think about an updated design. With the current we have some issue, regarding to components: The XC95xxXL in PLCC44 package are not available any more The used Godil is also discontinued There's a small mistake in the seria...
by roland
Mon Jun 04, 2018 10:05 pm
Forum: upcoming and recent events & exhibitions
Topic: Dutch Atomic Techsat on Saturday June 2nd
Replies: 23
Views: 1217

Re: Dutch Atomic Techsat on Saturday June 2nd

I had a very goood time as well. Thank you Kees for organizing this meeting again. And yes, I'm thinking about an update of the atom board. Atom 2k18 sounds good, doesn't it? Maybe our next Christmas present [-o<

I'll start a new topic soon....
by roland
Sat Jun 02, 2018 9:52 am
Forum: upcoming and recent events & exhibitions
Topic: ABUG SOUTH 1 to 3 June 2018 (Hampshire) BOOKING THREAD
Replies: 125
Views: 6156

Re: ABUG SOUTH 1 to 3 June 2018 (Hampshire) BOOKING THREAD

Robert, can you pm me your FaceTime contact data? We’re ready to connect.
by roland
Sat Jun 02, 2018 5:13 am
Forum: upcoming and recent events & exhibitions
Topic: ABUG SOUTH 1 to 3 June 2018 (Hampshire) BOOKING THREAD
Replies: 125
Views: 6156

Re: ABUG SOUTH 1 to 3 June 2018 (Hampshire) BOOKING THREAD

Have fun guys! Looking forward to see you today by a video connection.
by roland
Fri Jun 01, 2018 10:04 pm
Forum: stardot.org.uk
Topic: https certificates?
Replies: 69
Views: 3997

Re: https certificates?

I was at the monthly Atom User Group meeting this evening, so I didn't notice your post earlier. But the certificate looks fine to me, I don't think there's any improvement possible. Other actions could involve implementing automatic redirection from http to https and implementing HTST. But imho thi...
by roland
Fri Jun 01, 2018 2:58 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG SOUTH 1 to 3 June 2018 (Hampshire) BOOKING THREAD
Replies: 125
Views: 6156

Re: ABUG SOUTH 1 to 3 June 2018 (Hampshire) BOOKING THREAD

lazarusr wrote:
Fri Jun 01, 2018 10:08 am
Roland - what system do you want to use for the video link? I prefer FaceTime if you have a Mac your end. Otherwise I can try to set up Skype, but it isn't something I have used before.
I'll bring a MacBook, so we can use FaceTime.
by roland
Fri Jun 01, 2018 2:54 pm
Forum: stardot.org.uk
Topic: https certificates?
Replies: 69
Views: 3997

Re: https certificates?

'your connection to this site is not secure' Does it also tell you why? I have no problems on my computer (FF and Chrome), nor on my iPad. However, a quick check on https://www.xolphin.com/sslcheck/stardot.org.uk says: The certificate could be verified and is installed properly. The root and interm...
by roland
Thu May 31, 2018 10:32 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG SOUTH 1 to 3 June 2018 (Hampshire) BOOKING THREAD
Replies: 125
Views: 6156

Re: ABUG SOUTH 1 to 3 June 2018 (Hampshire) BOOKING THREAD

Robert,

Are you bringing a laptop with beamer for a video connection to the TechSat meeting in Wijbosch - NL?
by roland
Sat May 26, 2018 9:52 pm
Forum: stardot.org.uk
Topic: https certificates?
Replies: 69
Views: 3997

Re: https certificates?

Seems to work fine on my iPad =D>
by roland
Fri May 25, 2018 9:16 pm
Forum: off-topic
Topic: Forum GDPR compliance?
Replies: 58
Views: 842

Re: Forum GDPR compliance?

Two other gdpr things: - SSL is required - data portability: please send me all my posts so that I can move my account to forum.acornatom.nl :lol: I tried to make use of my right to be forgotten at our national "belastingdienst" (tax authorities) but my request was denied :cry: Thank you Daniel for ...
by roland
Sun May 06, 2018 8:07 am
Forum: acorn atom
Topic: New Atom owner - trying to determine mods
Replies: 10
Views: 492

Re: New Atom owner - trying to determine mods

The display looks great =D>
If you zoom into the picture it looks like the vga connector is plugged into the wall :lol:
by roland
Sun Apr 29, 2018 9:31 pm
Forum: upcoming and recent events & exhibitions
Topic: Dutch Atomic Techsat on Saturday June 2nd
Replies: 23
Views: 1217

Re: Dutch Atomic Techsat on Saturday June 2nd

Looking forward to meet you Neil. Just bring something you're working on. Or just a good mood :lol:
by roland
Sun Apr 22, 2018 8:35 pm
Forum: general
Topic: Electron Forever E-Magazine Issue 1
Replies: 16
Views: 524

Re: Electron Forever E-Magazine Issue 1

That magazine looks very profesional. I hope that the Electron community provides a lot of input for it. Well done =D>
by roland
Wed Apr 18, 2018 9:17 pm
Forum: acorn atom
Topic: Atom 16 bit RISC
Replies: 6
Views: 395

Re: Atom 16 bit RISC

I didn't know you were working of this. Looking forward to see it on a techsat.

Btw, shouldn't it be COLOUR 3 :lol:
by roland
Thu Apr 12, 2018 10:49 am
Forum: acorn atom
Topic: Quantum Atom Challenge
Replies: 6
Views: 439

Re: Quantum Atom Challenge

Just a speculation, without any investigation of the datasheets: can it be caused by #B002 changing during the execution of the ADC #B002 instruction?
by roland
Wed Apr 11, 2018 9:00 pm
Forum: acorn atom
Topic: Quantum Atom Challenge
Replies: 6
Views: 439

Re: Quantum Atom Challenge

The first thing that pops into my mind is a glitch in the cpu or hardware. Perhaps a memory read error (bpl opcode 0x10 instead of bpl opcode 0x30 which has only one diiferent bit). I didn't run the routine yet, but is there any difference on what type of real Atom you run this? Original, Atom2k15, ...
by roland
Tue Apr 10, 2018 9:15 pm
Forum: introduce yourself
Topic: A new member
Replies: 17
Views: 605

Re: A new member

@oss003, @davidb, @Multiwizard, thanks! And nice to read that there are more dutch Acorn enthousiast here. :) Best regards, Erik Hi Erik, Welcome to this forum. I'd like to invite you for our annual techsat on the 2nd of June in Wijbosch. A famous village near Schijndel. It's very well known becaus...
by roland
Sun Apr 08, 2018 8:06 am
Forum: upcoming and recent events & exhibitions
Topic: Dutch Atomic Techsat on Saturday June 2nd
Replies: 23
Views: 1217

Re: Dutch Atomic Techsat on Saterday June 2nd

Because 67% of the attendees wanted to start earlier, I changed the opening time to 10:00h ...... 8) Good job, as usual =D> Did you also contact the people that are not (very often) on StarDot but visit our meetings? Otherwise we seem to have only four attendees. The same weekend there is also an A...
by roland
Wed Apr 04, 2018 9:55 pm
Forum: acorn atom
Topic: Program Power Machine Code Monitor ROM
Replies: 8
Views: 590

Re: Program Power Machine Code Monitor ROM

I use the DISAS and STEP ( or TRACE ) statements regularly. They are in several expansion roms.
by roland
Mon Apr 02, 2018 9:13 pm
Forum: acorn atom
Topic: Micro Power Ltd Rom board
Replies: 24
Views: 668

Re: Micro Power Ltd Rom board

Hoglet wrote:(I have a local copy of all of these).
:shock: 8) :lol: