an example can be found on AMOSPro_Examples:Examples/H-4/Help_46.AMOS
Sets a special fast flag in the current device and disables a lot of internal checking which would otherwise slow down the communication process. Use it for high speed transfers such as MIDI. Warning: When you call this command, the protocol will be changed to:
PARITY EVEN,NOXON/XOFF and 8 bits.
Serial Fast channel