The Maxi-MMC board does not have these chips, but it does have two PCF80C21 slave processors labeled RSX and TRANSDUCER that perform similar functions.įrom their locations on the board I surmise that the RSX performs CD control functions I know for sure that the TRANSDUCER performs only pointing device control. The Mini-MMC board uses two 68HC05 slave processors for CD and pointing device control (they are usually called SERVO and SLAVE). Its closest cousin is the Mini-MMC board that is used in the CD-i 605 and CD-i 220 F1 players (a derivative of it is used in the CD-i 350/360 players). The CDI 181 MMC unit contains the so-called Maxi-MMC board that is not used in any other CD-i player. To understand some of the details, you'll need some microprocessor and/or digital electronics knowledge, but even without that the gist of the text should be understandable. In the previous post I promised some ROM and chip finds.
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