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AX = DA12h CL = subfunction 00h ??? 01h ??? 02h get ??? 03h ??? 04h ??? ???
Return:
CF clear if successful ??? CF set on error AH = error code (86h unsupported subfunction)
Desc: ??? performs various manipulations on system chipset registers
Notes: Subfunctions 00h and 01h are NOPs in protected and V86 modes due to a test of MSW bit 0. Subfunctions 00h-02h always return success
Category: Uncatagorized - Int 15h - A
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