>You could use a slower speed for a regular accelerator, but it would not be >useful for what I was targeting, > which was streaming reads of an entire track at once in order to read all > copy protected bits. For PRG loading you wouldn't need to transmit the raw GCR at all, however you would need to decode it on the drive but jiffydos is already doing that. I'd be surprised if burst mode couldn't be made to run as fast or faster than jiffydos. The cpu overhead of doing the bitbanging has to be greater than using the CIA, even at 1mhz. The problem is the amount of effort required to just speed up the C128 + 1571/1581. I did look at what hardware/software changes would be needed to implement burst mode on the 1541. There is an official work round for the shift register bug in the VIA, plus I think the 1571 has a buffer for transmitting that is disabled/enabled using a bit on one of the VIA parallel port pins (which is why the 1571 can't use the same parallel port hook up as a 1541). I think that would be an awesome project that would free us from the shackles of jiffydos. Message was sent through the cbm-hackers mailing listReceived on 2014-05-06 10:00:03
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