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- [12. Floppy, IDE, and ATA Support]
- EMBEDDED BIOS FLOPPY, IDE, AND ATA DISK SUPPORT
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- FLOPPY DISK Support:
-
- Designed especially for embedded applications, Embedded BIOS supports up
- to two floppy disk drives driven by an NEC 765, Intel 82077A-type, or
- Intel 82078 disk controller. IT WORKS WITH OR WITHOUT A DMA CONTROLLER,
- which is truly important for platforms such as the Intel 386-EX that
- don't have standard DMA controllers usable by desktop BIOSes.
-
- IDE Support:
-
- The Embedded BIOS IDE driver supports all known IDE drives in existence.
- We support autodetection of drive geometry, user-configurable drive
- geometry, and industry standard geometry conversions including LBA and
- CHS (Phoenix) translations. Embedded BIOS directly supports drives
- up to 8.4 gigabytes in size, without a DOS device driver (greater than
- 1023 cylinders). It has been stringently tested with super-high-speed
- 1.4" and 2.8" drives used in compact designs, and also with large IDE
- drives in the multi-gigabyte category, to ensure that your real-time
- embedded application will work with these devices using the best per-
- formance the drive can offer.
-
- The autodetection of drive geometry is important for embedded systems
- because the BIOS factory defaults need not be modified when hard disks
- are upgraded in the field; instead, Embedded BIOS automatically detects
- a new drive type and can begin using it without user intervention in the
- SETUP screens.
-
- LBA and CHS translations are also important. They are essential for
- systems that will be using drives loaded from MS-DOS, Windows, or OS/2
- hosts using LBA or CHS geometries. Embedded BIOS supports the standards,
- so that you can use them to your advantage.
-
- ATA Support:
-
- The PCMCIA modules supported by Embedded BIOS provide a special ATA mode
- that eliminates all but the most essential code to power-up the PCMCIA
- controller into ATA mode, so that it behaves just like an IDE interface.
- And of course, the IDE driver has been tested with all known ATA cards.
-