The EightThirtyTwo ISA – Part 23 – 2021-01-22
It’s been some time since I’ve made any significant changes to the EightThirtyTwo ISA, CPU or compiler backend, and this is mostly because I’ve been busy using it in real projects.
EightThirtyTwo’s original purpose, apart from the obvious learning exercise, was to be the supporting CPU in the AGA Minimig core for the Turbo Chameleon 64, and it’s performed this function quite nicely: it’s significantly smaller than the secondary TG68 used in the ECS core, and somewhat smaller than the OpenRISC cores that were used in some other Minimig variants, while using fewer memory blocks due to its logic-based register file and reasonably good code-density.
Nevertheless there are always bugs to be fixed and improvements to be made.
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