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CAT lets you control the radio from a computer - a better description will be put up sometime.  For instant reading see the manual, it explains it and the serial format and parameters required.


===Undocumented Commands===
{|
|'''Name'''
|'''P1'''
|'''P2'''
|'''P3'''
|'''P4'''
|'''Opcode'''
|'''Notes'''
|-
|Read EEprom
|MSB
|LSB
|0x00
|0x00
|0xBB
|Returns 2 bytes, the specified address and the 'next' address.  16 bit memory addressing, unused memory returns 1 byte (for me 0xf0).
|
|}

===Interesting Memory Locations===
{|
|'''Address'''
|'''Name'''
|'''Values'''
|-
|0x0068 
|VFO
|0x80=VFO-A 0x81=VFO-B
|-
|0x008D 
|Split 
|0x00=No split, 0x80=split
|}

My work in progress to map out the memory of the FT-897 is available at [http://www.0xdecafbad.com/?p=154 0xdecafbad.com]