Hi, I have got an old motherboard MSI Z77A-G43. I am not able boot from USB stick so I decided to upgrade BIOS.
Have got version 2.05.
There is newer version 2.13 and afudos 2.38 on official MSI website.

Booted to FreeDos and used command AFUDE238.EXE E7758IMS.260
Can you help me why I getting error "ROM file size does not match existing BIOS size" during flash procedure?
Do I have use right version of AFUDOS?
May I use any specific switch in afudos command?



C:\AFUDE238.EXE BACKUP.ROM /O
+---------------------------------------------------------------------------+
| AMI Firmware Update Utility(APTIO) v2.38 |
| Copyright (C)2011 American Megatrends Inc. All Rights Reserved. |
+---------------------------------------------------------------------------+

Reading flash .........
Reading flash ......... 0x00000000 (0%)
Reading flash ......... 0x00000400 (0%)


Reading flash ......... 0x005FF800 (99%)
Reading flash ......... 0x005FFC00 (99%)
Reading flash ......... done


C:\AFUDE238.EXE E7758IMS.260 /D
+---------------------------------------------------------------------------+
| AMI Firmware Update Utility(APTIO) v2.38 |
| Copyright (C)2011 American Megatrends Inc. All Rights Reserved. |
+---------------------------------------------------------------------------+

Reading file .......... done
FFS checksums ......... ok
- ROM file size does not match existing BIOS size
C:\
C:\DIR
Volume in drive C is FREEDOS2021
Volume Serial Number is 3518-1904

Directory of C:\


AFUDE238 EXE 194,496 07-07-2011 10:00p
BACKUP ROM 6,291,456 01-18-2022 1:45p !!!!!my saved actual ROM
COMMAND COM 85,048 04-30-2021 12:54p
E7758IMS 200 8,388,608 02-23-2012 7:39p
E7758IMS 260 8,388,608 10-11-2012 2:14p !!!!!new ROM from MSI website
E7758IMS 2D0 8,388,608 03-07-2014 1:10a
FDAUTO BAT 1,792 12-09-2021 5:42p
FDCONFIG SYS 740 12-09-2021 5:42p
KERNEL SYS 46,685 04-30-2021 12:54p