Posted By
Gaia
on 2006-08-22
18:33:11
|  Re: YAPE speed
The 1551 emulation is slower because it emulates a 2 MHz CPU unlike the 1541 where it runs at a mere 1 MHz. So the emulated drive must be clocked twice as much. For the rest the 1551 really is a simple drive: just the CPU , the 2 simple TIA's, and a counter. Especially when compared to the 1541 where you have two rather complex VIA's to deal with.
Actually changing drive type could preserve the D64, but I have been too lazy to fix that. Maybe in the next version. The two drive shares the same drive mechanics, so in theory it could preserve that part of the emulation that does the raw physical disk access.
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