*******************************************************************************
** Usage of IOP331 adapter
** (All In/Out is in IOP331's view)
-** 1. Message 0 --> InitThread message and retrun code
+** 1. Message 0 --> InitThread message and return code
** 2. Doorbell is used for RS-232 emulation
** inDoorBell : bit0 -- data in ready
** (DRIVER DATA WRITE OK)