The development-use 64DD does not have built-in DDROM. The special development-use IPL is located and used from an ordinary ROM cartridge address. This is different from the address in DDROM but has no effect on development.
To access font and wave data in the same way it is accessed in DDROM on a consumer-use drive, you need the 64DD system's IPLROM cassette. The same contents stored in the DDROM of the consumer-use drive are stored on the board of this IPLROM cassette.
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Last Updated March, 1999