ROM Adapter board to be able to use AT28HC64B or 27256 OTP ROM chips in lieu of a 2364, to be fitted on a Commodore 64, Commodore 1541 Floppy Drive or other similar equipment.
Licensed under the CERN Open Hardware Licence Version 2 - Permissive, do whatever you want with this.
More information available in the schematics diagram.
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