Super A'Can soundchip progress (Patreon)

A short post with some good news and (mildly) bad news: tracing and cell boundaries of the UM6619F A'Can soundchip are 99% done after 265 hours.

The bad news: that was the easiest step. Now cells need to be understood, which will involve some guesswork due to the transistors not being individually visible. Nothing really "bad" in its true sense, just lots more work to be done before any exciting discoveries.

Other WIP is a long overdue tutorial on reverse-engineering gate arrays from start to finish, using the one found in the PC Engine's multitap (done a few days ago) as an example: https://github.com/furrtek/VGChips/tree/master/NEC/uPD65005-195. I'll link to it when the first version will be ready for publishing.

The also long overdue cart-based FPGA NeoGeo demo board project is progressing after being more or less voluntarily being put aside for some years.