From: Shawn Jefferson (sjefferson_at_sd62.bc.ca)
Date: 2002-11-05 19:56:48
>>> Christian Groessler <cpg_at_aladdin.de> 11/04/02 04:39PM >>> > >Also there lurk some more problems for a general solution of the >sector size issue: If I read sectors 1 to 3 on a 256 byte formatted >disk, I still have to specify sectorsize 128. So sectors 1-3 are >always 128 bytes on the xf551. This is indeed my problem. If I set the sector size to 256 and try to read sectors 1-3 I get an error. Sectors 4 to n, are no problem. Is this the dio code giving the error or the OS? Might I have to set the sector size to 128 for the first three sectors, then 256 for the remaining? >Are sectors 1-3 on any medium always 128 bytes? How is this handled >e.g. in the SmartIDE code? Would large partitions, such as 16 MB Sparta format be 128 bytes in the first 3 sectors? I don't know. Let me see... I couldn't see anything in the code that does anything special when reading sectors 1-3. Bob is hooking the D: handler so that if the drive number corresponds to a hard drive partition it goes to his code, if not it goes to the regular D: handler code. His read code just grabs as many bytes as required from the hard drive after converting sector number to physical head/track/sector. If anything special is going on regarding the first 3 sectors it would be in the OS code. ---------------------------------------------------------------------- To unsubscribe from the list send mail to majordomo_at_musoftware.de with the string "unsubscribe cc65" in the body(!) of the mail.
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