INT 10 - Chips & Technologies Extended BIOS - RETURN 82C45X CHIP INFORMATION
        AX = 5F00h
Return: AL = 5Fh function supported
            BL = chip type (see below)
            BH = video memory size (00h 256KB, 01h 512KB, 02h 1MB)
            CX = miscellaneous information (see below)
SeeAlso: AX=5F01h

Bitfields for chip type:
 bits 7-4 chip type
        0000: 82c451
        0001: 82c452
        0010: 82c455
        0011: 82c453
        0101: 82c456
        0110: 82c457
        0111: F65520
        1000: F65530
 bits 3-0 revision number

Bitfields for miscellaneous information:
 bit 0  DAC size (0=6-bit, 1=8-bit)
 bit 1  system type (0=PC/AT, 1=PS/2)
 bit 2  extended text modes supported by BIOS
 bit 3  reserved
 bit 4  extended graphics modes supported by BIOS
 bit 5  reserved
 bit 6  BIOS supports graphics cursor
 bit 7  BIOS supports anti-aliased font
 bit 8  BIOS supports pre-programmed emulation
 bit 9  BIOS supports auto emulation
 bit 10 BIOS supports variable mode set at cold boot
 bit 11 BIOS supports variable mode set on warm boot
 bit 12 BIOS supports emulation mode set at cold boot
 bit 13 BIOS supports emulation mode set on warm boot
 bits 14-15 reserved

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