CPU PORT TO FLOPPY DISK DRIVE CPU CONNECTOR J7 TO FLOPPY DISK DRIVE CONNECTOR P7 1----GROUND------------------------1 2----HDLOAD*-----------------------2 3----GROUND------------------------3 4----INUSE*------------------------4 5----GROUND------------------------5 6----DRIVE SELECT 3* 7----GROUND------------------------7 8----INDEX*------------------------8 9----GROUND------------------------9 1e---DRIVE SELECT e*---------------le 11---GROUND------------------------11 12---DRIVE SELECT 1*---------------12 13---GROUND------------------------13 14---DRIVE SELECT 2*---------------14 15---GROUND------------------------15 16---MOTORON*----------------------16 17---GROUND------------------------17 18---DIRECTION SELECT*-------------18 19---GROUND------------------------19 2e---STEP*-------------------------2~ 21---GROUND------------------------21 22---WRITE DATA*-------------------22 23---GROUND------------------------23 24---WRITE GATE*-------------------24 25---GROUND------------------------25 26---TRACK ee*---------------------26 27~--GROUND------------------------27 28---WRITE PROTECT*----------------28 29---GROUND------------------------29 3e---READ DATA*--------------------3~ 31---GROUND------------------------31 32---SIDE ONE SELECT*--------------32 33---GROUND------------------------33 34---READY*------------------------34