Format of FLAGS:
================

 Bit     Description
 ---     -----------
 15      1
 14      RB2 \
 13      RB1  >  Current Bank Number
 12      RB0 /
 11      V       ;OF
 10      DIR     ;DF
 9       IE      ;IF
 8       BRK     ;TF
 7       S       ;SF
 6       Z       ;ZF (ZeroFlag used by dndbbs)
 5       F1      General Purpose user flag #1
                 (accessed by Flag Special Function Register)
 4       AC      ;AF
 3       F0      General purpose user flag #0
                 (accessed by Flag Special Function Register)
 2       P       ;PF
 1       BRKI    I/O Trap Enable Flag
 0       CY      ;CF (CarryFlag used by dndbbs)

-end-
