Powering up the #EasyZ80 for the first time...
Full details here: https://emalliab.wordpress.com/2026/04/16/easy-z80-sbc/
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Kevin
@emalliab@mastodon.social
mastodon 4.8.0-nightly.2026-10-06Music, software, electronics, maker, art, books, writing, kids. geek, dad, engineer, blogger, musician. I only follow what I think I can keep up with.
Music related making: @diyelectromusic@mastodon.social
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Joined October 28, 2022
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Using a #OneROM as a 2732 EPROM replacement in an #Atari2600 cartridge.
https://emalliab.wordpress.com/2026/01/22/atari-2600-cartridge-emulation-part-4/
Hoping to find a bit of time to build a couple of new computers over the next few weeks...
Messing around with mini (20x20mm) LED matrix displays...
https://emalliab.wordpress.com/2026/01/18/mini-8x8-led-matrix/
Replying to
And now with a simple example...
https://emalliab.wordpress.com/2026/04/06/pio-on-the-raspberry-pi-pico-part-2/
Replying to
So, I realised this morning that the horizontal timings of PAL vs NTSC are the same, it is just the different number of vertical lines that makes the difference in the refresh rate.
So actually, I still don't really know what the issue was, but my updates to the code seem to make it a lot more reliable for me.
Maybe my 2600's clock is a bit off. Or maybe the overclocking of the Pico is slightly different.
Anyway, it works and that is the main thing, and I've learned a lot getting this far.
Replying to
And now some notes about how I got that far and that show the 6502 actually running some(one else's) code.
#picocomputerhttps://emalliab.wordpress.com/2026/01/02/rp6502-the-picocomputer/
This is a great conversation.
And they mention the fabulous Library of Babel.
If you've not come across it before, look it up (and try the "online" version :))
Programming some custom ROMs for the Atari 2600.
https://emalliab.wordpress.com/2026/01/07/atari-2600-cartridge-emulation-part-3/