On this page, INFOPLUS will attempt to identify the type of computer you
have, and the ROM (Read Only Memory) that it contains.

Machine Type:   This uses a byte in the BIOS ROM, and, on some machines,
                some extra information to determine the computer type, and
                in some cases, the exact model. If your computer is an AT
                or a 386/486, you get some extra information telling you
                about other hardware aspects of the computer. If you have
                a PC/XT type computer, and you see information about DMA
                channel 3 being used or not, you can probably disregard the
                information, as some clones don't properly support the
                function call used.
BIOS source:    INFOPLUS scans the computers main ROM BIOS, looking for a
                copyright message, which it displays.
BIOS date:      INFOPLUS displays what should be the date at a specific
                location in the ROM BIOS.
BIOS extensions:Some add-in cards have ROM BIOS's of their own to handle
                special functions, and to extend the features of the
                computer. The most common are for the video and hard disk
                controller boards.
                Video BIOS's are found in all video cards except those that
                only support CGA or Monochrome graphics. It typcially
                starts at C000. (NOTE: I've noticed that some VGA cards lie
                about their size. If your VGA card supports extended modes
                such as 800x600, but the size shown is only 24K, then you
                might have problems with programs like QEMM and Windows 3.
                The BIOS's on these cards are really 32K. For QEMM, add the
                line X=C000-C7FF or ROM=C000-C7FF.)
                Unless you have an AT with an MFM controller, you'll
                probably have a hard disk BIOS at C800. Other common
                addresses are D800, and DC00. Some hard disk controllers
                have what seems like two BIOS. One part is only needed at
                boot-up and for formatting the disk.