It is configured to use the external EPROM. They used instead of P8049AH also P8039AH, which is the same model but without internal ROM. Cherry did use this controller logic with several of their other products. I’m not sure about it, but it looks that this keyboard PCB is produced by Cherry Germany and not Commodore. The P8049AH contains 2k ROM, it isn’t used and relies on an external EPROM for the program. The good thing about this is no special MOS chips involved. All later Amiga keyboards use a MOS keyboard controller. The keyboard controller is made out of one of the first Intel 8 bit micro controllers (MS48 family): It seems that the PCB from deskthority doesn’t have the brown pertinax PCB.
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