I believe that this is the last of the 5.x series of Happy's WSS. It was the last version made for the Original 810 Happy and it supports the "Autospeed MOD" a small circuit mod that added a second "lower gear" to the 810 drives motor speed circuit. It enabled the 810 Happy drive to automatically slow down so it could write large tracks with > 22 sectors per track, something the 1050 Happy could do right from the start. |