On 05/04/2012 07:22 AM, Baltissen, GJPAA (Ruud) wrote: >> Not every 1772 can be overclocked > > You mean running at 4 MHz, why would that be needed? Or am I missing > something? No, the WD1772 needs to run at 8 MHz to read double density. You have overclock it to 16MHz to read high density unless you revert to reducing the rpms. Not all 1772 were able to take that abuse. Some just didn't work, some failed after a while. And the still unanswered question is, how may cycles of a 6502 do you need to read one Byte from a WD1772 including verification that it's a valid one. I have the nagging suspicion that the data seperator as used in a 1541 with using the SO pin is as fast as it gets and all other solutions need extra cycles and that's why a 1581 runs at 2 MHz already even though the data rate is still DD. Gerrit Message was sent through the cbm-hackers mailing listReceived on 2012-05-04 17:00:09
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