{|{{Prettytable|width: 700px; font-size: 2em;}}|''BDIR ''||''BC2 ''||''BC1 ''||''CP1610 FUNCTION Function''||''PSG FUNCTION Function''|-|0 ||0 ||0 ||NACT ||INACTIVE. See 010 (IAB) |-|0 ||0 ||1 ||ADAR ||LATCH ADDRESS. See 111 (INTAK) |-|0 ||1 ||0 ||IAB ||INACTIVE: The PSG/CPU bus is inactive, DA7--DA0 are in high impedence state |-|0 ||1 ||1 ||DTB ||READ FROM PSG. This signal causes the contents of the register which is currently addressed to appear on the PSG/CPU bus. DA7--DA0 are in output mode. |-|1 ||0 ||0 ||BAR ||LATCH ADDRESS. See 111 (INTAK) |-|1 ||0 ||1 ||DW ||INACTIVE. See 010 (IAB) |-|1 ||1 ||0 ||DWS ||WRITE TO PSG. This signal indicates that the bus contains register data which should be latched into the currently addressed register DA7--DA0 are in input mode. |-|1 ||1 ||1 ||INTAK ||LATCH ADDRESS. This signal indicates that the bus contains a register address which should be latched in the PSG. DA7--DA0 are in the input mode. |}