Korg Polysix / Poly-61 / MonoPoly Key Assigner CPU Chip 8049-217

Description

The Mask ROM CPU chips in vintage Korg synthesizers are a common failure point and often get damaged by leaking batteries.  Unfortunately because these Mask ROM CPUs have the firmware on the chip, you can’t just pop in a generic MCS-48 (8049) CPU chip and be up and running.  This replacement chip is a drop in CPU replacement with the firmware on board for the main key assigner CPU.  All Polysix, Poly-61 and MonoPoly owners would be wise to keep one of these on hand as part of a “Survival Kit”.