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- Washburn & Co.
- Distributors of AMI Motherboard and BIOS Products
- 3800 Monroe Avenue, Pittsford, NY 14534
- 716-248-3627 FAX 716-381-7549
-
- Considerations in the Use of the AMI BIOS with OS/2:
-
- AMI BIOS's of modern vintage provide a Screen ID Code, visible at the lower
- left of the screen during the initial RAM count, and which can be made to
- return by resetting with Ctrl-Alt-Del:
-
- AMI BIOS and AMI BIOS Plus:
- aaaa-bbbb-mmddyy-Kc
- AMI Hi-Flex BIOS:
- ee-ffff-bbbbbb-gggggggg-mmddyy-hhhhhhhh-c
-
- If the screen ID code is in a form other than this the BIOS is either extremely
- old, or was produced by a company with a source code license. In the former
- case contact us for update information, but in the latter case only the
- motherboard manufacturer will be able to provide further information or
- updates. Everex 386 BIOS's are in this latter category.
-
- General Rules:
- 1. If an IDE type hard drive is installed the date ("mmddyy") should be 040990
- or later for use with ANY operating system, DOS included, due to the special
- timing requirements of IDE drives which were accommodated on the date noted.
- 2. With any other drive type, such as MFM, RLL, ESDI or SCSI, OS/2 may be
- expected to install and operate correctly if "mmddyy" is 092588 or later,
- provided that the Keyboard Controller Revision Level is suitable for the
- version of OS/2 being used. Note also that in the case of SCSI hard drives a
- driver compatible with the version of OS/2 being installed is likely to be
- required, and a special installation procedure may apply.
- 3. The Keyboard Controller Revision Levels ("c" in the Screen ID Code Examples
- above) expected to produce proper installation and operation of the various
- OS/2 versions are as follows:
- OS/2 1.0 or 1.1: 8, B, D or F
- OS/2 1.2x: D or F
- OS/2 1.3x or 2.0: F
- 4. If the Keyboard Controller Revision Level shows as 0 then the Keyboard
- Controller chip is NOT an AMI chip, even if an AMI License Sticker was applied
- to it by the motherboard OEM. This means that its performance under OS/2 is
- unknown - it may or may not work correctly. In some cases an AMI chip can
- successfully replace a non-AMI chip, but this is NOT a general rule - often the
- non-standard Keyboard Controller was used to combine motherboard functions not
- normally part of the Controller, and substituting a standard chip will cause
- the board to not function at all. In this case there is no solution other than
- replacement of the board. A Revision Level of 9 accompanied by a non-standard
- ID Code also indicates a non-standard controller (and BIOS), and the
- motherboard manufacturer should be contacted for further information.
-
- BIOS Updates:
- If a BIOS prior to the dates noted above requires replacement, note the
- following:
- 1. AMI BIOS and BIOS Plus series BIOS (16 character ID Code) for CACHED
- motherboards are customized for individual motherboard designs, and can ONLY be
- obtained from the motherboard OEM, with only THREE common exceptions:
- a) BIOS's with "aaaa" = E307 can often be replaced with a standard
- type.
- b) BIOS's for Northgate or Motherboard Factory motherboards EXCEPT
- the Northgate Slimline can be replaced by a standard type.
- c) BIOS's with "aaaa" = DAMI, DAMX, or EDAMI are usually for
- cached boards designed and/or built by AMI, and if so can be
- updated.
- 2. The complete Screen ID Code is required to properly address whether a BIOS
- update for other motherboards can be provided, and in the case of the Hi-Flex
- BIOS the complete SECOND and THIRD lines of the ID Code are also necessary. If
- not immediately visible on the screen they may be viewed by pressing the <INS>
- key during boot-up.
-
-