Victor 9000

Due to massive amounts of caffeine & sleep deprivation, A.R. Duell said: [snip] >The disk turns at a constant speed. What changes is the speed of the data >clock. The bits are sent faster for the outside tracks, so it can fit more >sectors on said tracks. >I never really saw the point of variable-speed drives. Changing the data >clock is a lot easier, and probably faster (getting the spindle >up-to-speed and locked at that speed takes considerable time). >> That's how it gets 21 sectors on tracks 1 to 17, 20 sectors on tracks 18 >> to 24, 18 sectors on tracks 24 to 30, and 17 sectors on tracks 31 to 35. >> AFAIK, all PET-era CBM drives do this, and the 1540 and 1541 drives do as >> well. >> Doug Spence >> ds_spenc(a)alcor.concordia.ca >-tony >ard12(a)eng.cam.ac.uk

Righto, Tony! There are programs that you can get for IBM PC's that do this and you can store 1.8Megs on a 1.44Meg drive! (Didn't the Apple and Amiga do this with there 800K and 880K drives, respectively?)