name: WD1772 function: Floppy Disc Controller package: DIP,28 manufacturer: WD added-by: Mario Becroft +--()--+ CS | 1 28| INTR R/W | 2 27| DRQ A0 | 3 26| DD A1 | 4 25| WP DAL0 | 5 24| INDEX DAL1 | 6 23| TRK0 DAL2 | 7 22| WD DAL3 | 8 21| WG DAL4 | 9 20| MO DAL5 |10 19| RD DAL6 |11 18| CLK DAL7 |12 17| DIRC MR |13 16| STEP GND |14 15| VCC +------+ This information was added by a third party and may be incorrect. This pinout came from the Chipdir: http://www.chipdir.org/