INT 15 U - AMIAmerican Megatrends, Inc.(American Megatrends, Inc.) A hardware, software and firmware company founded in 1985. PCI BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. v1.00.12.AX1T - CMOS RAMA small amount (typically 64 or 128 bytes) of memory in the system's real-time clock chip that is preserved by the clock's battery and is used for storing configuration information. See also Real-Time Clock. BITFIELD MANIPULATION AX = DA20h BL = subfunction 00h set CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. data field BH = CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. data field number (00h-4Dh) CH = new value for bitfield (in lowest bits of register) 01h read CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. data field BH = CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. data field number (00h-4Dh) Return: CH = value of bitfield CL = mask of valid bits Note: both CL/CH shifted to move valid bits into lowest pos 02h set CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. byte CL = CMOS RAMA small amount (typically 64 or 128 bytes) of memory in the system's real-time clock chip that is preserved by the clock's battery and is used for storing configuration information. See also Real-Time Clock. address (00h-7Fh) CH = new value for CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. byte 03h get CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. byte CL = CMOS RAMA small amount (typically 64 or 128 bytes) of memory in the system's real-time clock chip that is preserved by the clock's battery and is used for storing configuration information. See also Real-Time Clock. address (00h-7Fh) Return: CH = value of CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. byte 04h update CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. checksums Note: sets 2Eh/2Fh to checksum of 10h-2Dh and 7Eh/7Fh to checksum of 48h-7Dh 05h verify CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. checksums Return: CF clear if checksums OK AH = 00h CF set if checksum mismatch AH = 01h Return: CF clear if successful AH = 00h CF set on error AH = error code (86h unsupported function/data field) Notes: this function was not supported by the v1.00.05.AX1 BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly., but had been added by 1.00.12.AX1T after using subfunctions 00h or 02h, the application must call subfunction 04h to update the checksums to prevent an error the next time the system is booted (Table 00542) Values for AMIAmerican Megatrends, Inc.(American Megatrends, Inc.) A hardware, software and firmware company founded in 1985. BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. v1.00.12.AX1T CMOS(Complementary Metal-Oxide-Semiconductor) A type of integrated circuit design known for its low power consumption. bitfield identifier: ID address bit(s) contents 00h 1Ah 7-6 01h 1Dh 7-6 02h 6Eh 1 03h 77h 0 04h 77h 1 05h 77h 2 06h 77h 3 07h 77h 5 08h 77h 6 09h 77h 7 0Ah 78h 7 power management enabled??? 0Bh 78h 6 0Ch 10h 7-4 first floppy drive type 0Dh 10h 3-0 second floppy drive type 0Eh 11h 7 0Fh 20h 4-0 selected language for error messages/setup utility 10h 11h 2-1 11h 11h 4 12h 11h 0 13h 11h 3 14h 13h 7 15h 13h 6-5 16h 13h 4-2 17h 19h 7 18h 19h 6 19h 19h 5 1Ah 19h 4 1Bh 1Eh 2-0 1Ch 1Bh 7-6 1Dh 1Ch 7 1Eh 1Ch 3 1Fh 1Ah 5-4 20h 1Dh 5-4 21h 1Bh 5-4 22h 1Ch 6 23h 1Ch 2 24h 1Ah 3-2 25h 1Dh 3-2 26h 1Bh 3-2 27h 1Ch 5 28h 1Ch 1 29h 1Ah 1-0 2Ah 1Dh 1-0 2Bh 1Bh 1-0 2Ch 1Ch 4 2Dh 1Ch 0 2Eh 50h 7-0 2Fh 51h 7-0 30h 52h 7-0 31h 53h 7-0 32h 60h 0 33h 60h 0 34h 60h 0 35h 60h 0 36h 60h 0 37h 60h 0 38h 60h 1 39h 61h 7 3Ah 60h 2 3Bh 61h 6-4 3Ch 61h 2-0 3Dh 60h 7-6 3Eh 60h 5-4 3Fh 78h 5-4 40h 6Eh 5 41h 1Eh 3 42h 6Eh 0 43h 6Eh 2 44h 6Fh 1-0 45h 6Fh 1-0 46h 28h 4-2 47h 28h 7-5 48h 6Eh 4 49h 6Eh 3 4Ah 76h 7-0 4Bh 77h 4 4Ch 11h 6 4Dh 1Fh 7-0