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io.sys decompile??

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Name: mike
Date: March 12, 2001 at 19:38:07 Pacific
Comment:

what does the io.sys tell the computer to do and how does it tell it to do it?????



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Response Number 1
Name: hmpxrii
Date: March 13, 2001 at 06:21:50 Pacific
Reply:

IO.SYS is loaded into memory by the boot sector and executed. It's main purpose is to install routines for reading and writing files and directories, and basic streams for the console as well as parallell and serial communication ports. It also sets up allocation tables for the memory, and then executes MSDOS.SYS (IBMDOS.COM on PC-DOS) and COMMAND.COM in that order.
It also processes CONFIG.SYS and loads the drivers there.


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Response Number 2
Name: Moiety
Date: March 15, 2001 at 11:07:24 Pacific
Reply:

One irksome caveat.

The most recent windoze setup hardcodes the windoze drive letter into IO.sys.


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