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BIOS Option Of The Week - Boot To OS/2. - PCSTATS.com BIOS Option Of The Week - Boot To OS/2.
Sun, Aug 24 2014 | 11:52PM | Filed under: BIOS| PermaLink Posted by: STAFF

"Older versions of IBM's OS/2 operating system use the BIOS function Int15 [AX=E801] to detect the size of installed system memory. Microsoft Windows, on the other hand, uses the BIOS function Int15 [EAX=0000E820]. However, the Int15 [AX=E801] function was later scrapped as not ACPI-compliant. As a result, OS/2 cannot detect the correct size of system memory if more than 64 MB of memory is installed. Microsoft Windows isn't affected because the BIOS function it uses is ACPI-compliant. This BIOS feature is designed to correct the memory size detection problem for OS/2 systems that have..."

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