Casio ALGEBRA FX 2.0 PLUS Appendix - Manual (Page 10)

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Specifications
Data Communications
Method: Start-stop (asynchronous), half-duplex
Transmission speed (BPS): 38400 bits/second (normal)
9600 bits/second (H-Copy & Send/Receive)
Parity: None
Bit length: 8 bits
Stop bit:
Send: 3 bits
Receive: 2 bits
Includes parity (None) 1-bit
X ON/X OFF Control: None