>  0065  tris     0x65    ; undocumented instruction

I'm sure it's just some sort of a leftover. TRISx was at one time the
TRIS-setting instruction

Others in the vicinity -

0062 OPTION [224] Use of this instruction is not recommended
0063 SLEEP
0064 CLRWDT
0065 TRIS PORTA [224] Use of this instruction is not recommended
0066 TRIS PORTB [224] Use of this instruction is not recommended
0067 TRIS IRP [224] Use of this instruction is not recommended

eg the old way was

movlw 0x55
tris portb

is now deprecated to

movlw 0x55
movwf trisb

Joe
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