Nintendo 1504166 Programming Manual - Page 126
Selecting Communication Function
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AGB Programming Manual Communication Functions Selecting Communication Function All the communication functions use an external expansion 6-pin connector. Communication functions are switched by the communication function set flag of the communication control register RCNT (2-bit) and the communication mode set flag of the serial communication control register SIOCNT (2-bit), which are described later. Communication Functions RCNT d15 d14 SIOCNT d13 d12 General Purpose 1 0 * * JOY Bus 1 1 * * 8-Bit Serial 0 * 0 0 32-Bit Serial 0 * 0 1 16-Bit Serial 0 * 1 0 UART 0 * 1 1 (* ... any) Do not change or reset a communication mode during communication, as this may cause a communication malfunction. ©1999 - 2001 Nintendo of America Inc. 126 D.C.N. AGB-06-0001-002B4