IBM 2274 - Manual (Page 46)

12 IBM Desktop System HMM
Flash (BIOS) Update Procedure
NOTE: The flash update procedure does not change
the model number and serial number
information in BIOS.
1. Prepare a bootable DOS diskette with
AWDFLASH.EXE, and one XXXXXXX.BIN files
NOTE: The AWDFLASH.EXE are flash utility
programs. The one VXXYYZZ.RN file has the
BIOS checksum information. The
XXXXXXX.BIN is BIOS source code binary file.
2. Insert the diskette and boot from drive A.
WARNING: Do not boot with any memory related
driver such as HIMEM.SYS, EMS.SYS....
3. At the DOS prompt, type A:> AWDAFLASH
XXXXXXX.BIN /PY/SN/CD/CP then press Enter.
4. The program updates the BIOS automatically.
IMPORTANT: Verify the BIOS checksum value shown
on screen is the same as the one in
VXXYYZZ.RN file.
WARNING: Do not turn off the system power while the
BIOS is programming, or the flash ROM will be
destroyed.
5. Power off system after the BIOS is completely
updated.