[no subject]

> I cannot find my reference!!  I remember having read that there
> is a difference in the timing (when crossing a page) between one
> of the instructions of an "02" vs a "c02."  I know nothing about
> disk protection, but I remember having read that this errant "02"
> instruction was used by disk protectors and that this caused
> problems when the IIe came out because some software no-longer
> worked because of the "c02."  (Note: I'm not talking about the
> "mouse nest.")  Perchance this is your problem?
> 
> I hope I've helped - probably not?!?!?  oh well   Larry


The problem had to do with an instruction which had its least
significant byte on the last 9$FF) byte of a page. The 6502
accessed the $00 byte of the current age rather than byte $00 of
the succeeding page. One program I know that used this protection
was a statistics package named, "DAISY."  Daisy had some
incredible protection which was not needed at all since the manual
was essential and 300-400 pages.

Kind Regards,
-- 

		Joe Walters att!ihlpm!bird, IH 2A-227 (708) 224-7189
		To know, and not to do, is not yet to know