Bitfields for K3 internal flags A:
Bit(s)	Description	)
 7	DoingUmlautExp
 6	CallINT15fct4F
 5	Beep1 (requires SendOut set in option flags B)
 4	ATflag (set for AT, 386, PS/2 Models 50-80)
 3	XTflag (set for PC, PC/XT, Micromint PC, Pencock PC, PS/2 Model 30)
 2	KeyClick
 1	UmlautExp
 0	UmlautTrans