INT 2F U - DR DOS 6.0+ - BOOT PHASE BROADCASTS FOR MEMORYMAX/RPLOADER/SECURITY
AX = 12FFh
BX = 0005h
CX = 0000h
DX = function
0000h MemoryMAX cleanup broadcast
0001h RPLOADER broadcast
!!! details to follow
Note: called at three separate points inside IBMBIO.COM