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Forum Index : Microcontroller and PC projects : for something a little bit different...
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| robert.rozee Guru  Joined: 31/12/2012 Location: New ZealandPosts: 2350 |
was looking through some older bookmarks and came across this, a complete zx80 implemented on an atmega8:  see: http://breatharian.eu/hw/atx80/index_en.html from the same fellow, Miroslav Nemecek, who did vga (http://breatharian.eu/hw/picovga/index_en.html) and svga (http://breatharian.eu/hw/picolibsdk/index_en.html) on a pico. cheers, rob :-) |
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Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6783 |
That's excellent. A lovely little implementation. I'm glad it's not done as a Z80 emulator running the Z80 ROM, there are too many of those sorts of things, and why not use the chip's capabilities? Some IO pins would have been nice though. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| robert.rozee Guru Joined: 31/12/2012 Location: New ZealandPosts: 2350 |
with the source available, it may be possible to map spare I/O pins to a memory address so that PEEK and POKE can used to control said pins. and while the atmega8 has 1k ram and 8k flash, the 328p has 2k ram and 32k flash. consider it a 'big brother' to tinybasic running on the attiny85. cheers, rob :-) Edited 2024-05-13 00:50 by robert.rozee |
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homa Guru Joined: 05/11/2021 Location: GermanyPosts: 351 |
I think you zx80 fans know this site, right? https://github.com/fruit-bat/pico-zxspectrum By the way: On the side, it even has an HDMI connection for both image and sound, if I understand correctly. I would love to have a picoMite with HDMI. Unfortunately, my knowledge is not yet sufficient ... Matthias |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6783 |
Don't set your heart on this. It almost certainly isn't going to happen. It would almost certainly require a complete rebuild of the firmware from scratch - just to see if it would work. You still need to keep sufficient resources for MMBasic and a decent size user program - probably rather more complex than a Speccy. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| JohnS Guru Joined: 18/11/2011 Location: United KingdomPosts: 3800 |
It's using the same DVI we discussed some months ago, I think. John |
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