[comp.sys.apple2] TD2

JCC118@psuvm.psu.edu (03/28/91)

Does anyone know of a patch or something so that Test Drive II will work with a
 ram card activated.  Also, is there a way to do a bit copy to a ram card?
Thanks,
String
P.S. I'll be sure to use 'backup' instead of 'copy' from now on.  Sheesh, I tel
l ya.
/When in doubt, whip it out.\

MQUINN@UTCVM.BITNET (03/29/91)

On Thu, 28 Mar 91 15:04:22 GMT <psuvm!jcc118@PSUVAX1.CS.PSU.EDU> said:

>Does anyone know of a patch or something so that Test Drive II will work with a
> ram card activated.  Also, is there a way to do a bit copy to a ram card?

I don't know how about fixing Test Drive, but I do know about bit copying.
It's not possible to do a bit copy to a RAMdisk with any current commercial
applications and there probably never will be.  RAMdisks work completely
differently than physical disk drives.  Physical disk drives store more
information than just the 512 bytes in blocks.  The tracks on a disk store
things such as sync bytes, which help allign the read/write head to the
beginning of the data; address field headers, data field headers, and some
other information too so ProDOS knows what track and sector is  currently
spinning under the read/write head(s).

Copy protected software may change the address, or data field headers, or
the number of sync bytes available, or line tracks next to each other
and various other things that can't be duplicated on a RAMdisk.  So,
theoretically, you COULD bit copy all of the information from a disk into
RAM, but it just wouldn't run.

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