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Forum Index : Microcontroller and PC projects : ELLO 1A with RTC
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| PhenixRising Guru  Joined: 07/11/2023 Location: United KingdomPosts: 1833 |
Knivd came up with a beautiful P2 module, over on the Parallax forum. Others have elaborated on the design but no sign of Knivd in a long time. |
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| Frank N. Furter Guru Joined: 28/05/2012 Location: GermanyPosts: 1073 |
He apparently updated RIDE on his GitHub account three weeks ago: https://github.com/knivd/C.impl-extended-C-interpreter-for-microcontrollers Frank |
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Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 8756 |
I always intended to build a ELLO but I couldn't find a source of the VGA/PS2 connector at a sensible price once postage had been taken into consideration. In fact, I found it very difficult to source other than from Mouser IIRC - a company I've never dealt with. I had a brief attempt at laying out a new board with more common connectors but gave up as it wasn't working out. I've not touched it for ages, but I still have the PCB if anyone wants it for the cost of the postage. I would advise anyone interested to find the connector first. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| Frank N. Furter Guru Joined: 28/05/2012 Location: GermanyPosts: 1073 |
Yes, I ordered that connector from Mouser back then, too. It was relatively expensive (significantly more than a standard VGA and two PS/2 connectors would have cost). It’s only worth ordering from Mouser if you exceed the magic €50 threshold - then you don’t pay shipping costs, which otherwise amount to €20 on their own. On the other hand, Mouser doesn’t charge a minimum order fee - only a mischievous person would think ill of that...  Still, it's a pretty nice little device and a lot of fun to use! It's really annoying that the .lsl command doesn't work anymore. It was very helpful to list the internal libraries... Unfortunately, I don't have a GitHub account - maybe someone could bring the issues I've listed to Knivd's attention? Frank |
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| PhenixRising Guru Joined: 07/11/2023 Location: United KingdomPosts: 1833 |
I have an affinity for the PIC32MX170 but with the ByPIC interactive language. Such a shame that it didn't catch on. At 40MHz and 32bit integers, performance is easily up there with the CMM2. Hardware interrupts and a huge library of code. If you choose to run your program within a fixed timer interrupt period (in my case, 1ms), the command prompt remains active. Compiled C code is only seven times faster. |
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knivd Regular Member  Joined: 07/09/2014 Location: United KingdomPosts: 73 |
Thanks for the good words about the Ello. In more recent time I have moved onto other things and have not touched it for quite some time. However, my new best friend Claude thought he might take a look at the code and try to fix those reported issues and then updated the repo. Unfortunately, I wasn't able to find my board to test the fixes but he was very confident and I checked the code and it appears correct. So, here it is - R122 in the github repo. I added the compiled hex as well. Looking at it, this version has some rudimentary support of the 8080, Z80, and 6502 CPUs on which I had started working back then, but can't remember how far I got with it. Anyway, let me know how it performs. I will keep checking this forum from time to time again. |
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| Frank N. Furter Guru Joined: 28/05/2012 Location: GermanyPosts: 1073 |
Thank you very much!  I’ll give it a go as soon as possible!!! Frank |
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| Frank N. Furter Guru Joined: 28/05/2012 Location: GermanyPosts: 1073 |
@knivd: Unfortunately, the new version isn't working properly: - ELLO does not start when the SD card is inserted. - The .lsl command still isn't working - I can't get any of my old programs to run anymore. After typing .=, nothing happens at all...  Loading the programs seems to be working....n without a number no longer renders the device unusable Frank |
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