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it really is a amazing nice new piece of Atom hardware Dave it really is =D> , but sadly I don't have any use for it... :-( Apart of the 2014 Atom all my Atoms are using CRT's... This board might also be very suitable to connect a VGA monitor to your Atom as there are conversion cables from HDMI to...

Welcome to this forum. Enjoy your visits here.

Greetings from the South of the Netherlands,
Roland

I had one comment myself: the keyboard connector had VCC and GND swapped compared to the Atom 2k15 design. That would make the keyboard connectors incompatible. After fixing this I just closed my eyes, created the gerber files and uploaded the stuff to JCLPCB. I expect them somewhere next week.

Today I received a few RAM chips from "Ali" but they were wrapped in non-static plastic. So I want to test them with my G540 programmer. When I select a RAM device in the G540 application and I click "OK" it does not switch to the selected RAM device but stays at the last chosen device. Also the RAM...

Hmmm ... I'm a bit to enthusiastic I'll wait until you have tested the boards.

If there is no more further demand for it I'll order five boards this weekend for the Dutch audience.

If there are no more comments I am going to order the pcb's this weekend.

Well, name your price and I'll decide if I want one or two 8271's. The parts of the Atom FDC board are easy to get or even to replace by a (single) CPLD but the 8271 is a show-stopper when it comes to recreating the FDC board. So one or two controllers might be welcome.

Did somebody already today say to you that you are brilliant ?



I don't have a colour board so I cannot give an answer to the questions. I'd love to see this board working in my blue Atom

Ok. Noticed

The only thing I'm slightly wary of is the lack of the /NKEN signal on Roland's YARRB RAMROM board. I've just been experimenting with the Mk 3.5 Video Board. When running YARRB at 2MHz, the system behaviour is a bit erratic. The Atom Software Archive menu won't run for example. So we do need a way ...

hoglet wrote: ↑

Sun Apr 14, 2019 1:17 pm

Where are you with design rule checks in the PCB layout program? All passing?

Yes, before I started the design I set up the design rules with the specs of MakePCB. The specs of JCLPCB are within those specs and the DRC runs without any errors, warnings and unconnected pads.

Thanks Dave, I really appreciate your support!

I have moved the 2x6 pin header and I also enlarged the holes. They were 1mm but after updating the footprint they were reset to 0.8mm. I now updated the footprint now with 1mm holes.

My final design is in the attached file.

Hi Sparky, Another Atom User 8) Welcome and enjoy your visits here. Nice memory board, looks a bit like a predecessor of the memory boards of the Dutch Atom User Groups BITD.What does the small board do? Did you notice that nowadays we have smaller RAM/ROM boards with much more memory (up to 256Kb) ...

I asked one if the attendands if I could take it and sadly he said no and started quoting various regs at me. Same here ... they have even cameras to prevent valuable retro-stuff being stolen. The recycling depot sells those goods to recycling companies (not on Ebay afaik) but sometimes I have to l...

It is really amazing how quick you release these new games for our Atom

Phew! I had a horrible feeling that you might have already sent the boards off. I've had too much wine this evening to make a reliable measurement, so I'll check tomorrow. :D I assume you didn't drink that wine because of that horrible feeling :lol: I'll wait with ordering the boards. By placing th...

Thanks for noticing me. I bought a schuifmaat to measure the exact distances on my board. It seems you're right and I corrected my footprint. I got the distances by "guessing" and printing the footprint but my printer is not accurate enough (I had the same issue with the fast SRAM footprint). Now it...

Me too, probably. If it doesn't clash with the Yarrb board.

I am willing to order a few boards for people in the Netherlands if that saves on shipping costs. I also want a board for my Yarrblue Atom.

I cannot answer to your monitor question but I want to make a remark about this setup: it really looks like an advertisement of the Atom. There are completely no wires visible. What a clean setup

Yes, I have a modulator. But I am not selling it
You only have to pay the postage costs. I'll PM these to you.

Does it also restore if you press with a finger on that adjustment screw? Maybe a bad contact.
I probably have a spare modulator if needed....

Today I received my Yarrb boards. As some parts are hard(er) to get I want to sell them as complete kits but I don’t have all the parts yet.

If someone wants a bare board, just drop me a pm or respond to this post.

The first time I tried this listing, I was reading from a HTML version of the manual and it had '0' instead of '#' when defining A and B, subroutine c was labelled k and some 0 and O were mixed up - I wonder if OCR was used to create the text from a scan of the original manual. Yes, many of these H...

The FPGA board is powered with 5V through the two schottky diodes. The ground plane "covers" the fast SRAM.

When I look at the code I don't see anything wrong. Didn't you copy/paste an illegal character? I suggest you remove line 220 and retype it (not copy/paste). The R. in line 510 is not necessary. This line is just another entry point for the 3D plotroutine. It sets Z to 3 and continues at line 520. I...

OMG .... three Atoms on Ebay https://www.ebay.com/itm/Rare-Vintage-Acorn-Atom/153436267748?hash=item23b983a4e4:g:UE0AAOSwRW9cogP8 https://www.ebay.com/itm/ACORN-ATOM-ISSUE-5-WORKING-VINTAGE-RETRO-GAME-COMPUTER-VERY-RARE/283446417599?hash=item41feb918bf:g:8~kAAOSw3TFcrO8v https://www.ebay.com/itm/ULT...

Almost my final design of the pcb. I just need to add some info of the jumpers on the silk screen.....

The Yarrb board has it own way to enable the buffer. Maybe you want to wait for it. The boards should arrive quite soon.