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README.md

Avalon Semiconductors AS2650 8-bit micro-processor

License UPRJ_CI Caravel Build

This is a partial implementation of the abandoned Signetics 2650 CPU architecture from 1975.

Only a subset of the full feature set is implemented here. The following features are part of the S2650, but missing from the SA2650:

  • Interrupts
  • Decimal Adjust Register (dar) instructions
  • Extended I/O (wrte, rede) instructions
  • Memory paging (address space limited to 8192 bytes, emulating a S2650 that is ‘stuck’ on page 0)

Please see this repository for Documentation on the CPU architecture, as well as an assembler, emulator and example programs.