What is the type of OEM bios logo *.bmp?

DHT · Thu Sep 05, 2002 3:19 pm

When I extracted OEM bios logo with default extention .bmp I could not view it (it is not a bmp type). What type is it and how to change/view it?

Thu Sep 05, 2002 5:18 pm

Try an EPA to BMP converter program.

Thu Sep 05, 2002 8:24 pm

Rename the .BMP file to .EPA. Get EPACoder to convert between EPA files (two versions) and real BMP. http://www.biosmods.com/download.php

tomuf · Fri Sep 06, 2002 9:03 am

I think that 256 color logos are saved as normal BMP with 2 differences: first 2 bytes are 00,00 instead of 'BM' and order of lines / columns (one of them) is inverse... So edit the first 2 bytes with some hex editor and flip the image in Photoshop. 16 color logos are stored in different format (AWBM) and utility must be used to convert it.

DHT · Fri Sep 06, 2002 12:54 pm

I already tried to rename it to .epa but the picture chagned to an unrecornizable mess in EPAcoder.
I think Tomuf's comment makes sense.
How to convert to AWBM format and vice versa?

tomuf · Fri Sep 06, 2002 1:50 pm

Maybe you can try to look if there isn't any program that converts AWBM to BMP. There is a description of AWBM format somewhere on the internet. Some people call it EPA version 2.0... There should be something like AWBMREAD which accepts only files with EPA extension, so maybe Rainbow was right that you must rename it. If it is 256 color LOGO just change it to BM and flip it and your're ready.

DHT · Sat Sep 07, 2002 4:09 am

Yes, Rainbow is right.
I managed to load into EPAcoder only small 16color logos.
I could not load big (301Kb bmp) logo into EPAcoder after renaming it from .bmp to .epa
I could not follow Tomuf's advice: changing only 'BM" did not help.
Rainbow, do you have any advice on how to load big logos into EPAcoder?

tomuf · Sat Sep 07, 2002 6:54 am

can you send me that file ?

DHT · Tue Sep 10, 2002 4:25 pm

The file has already been sent to you

Tue Sep 10, 2002 6:04 pm

DHT wrote:Yes, Rainbow is right.
I managed to load into EPAcoder only small 16color logos.
I could not load big (301Kb bmp) logo into EPAcoder after renaming it from .bmp to .epa
I could not follow Tomuf's advice: changing only 'BM" did not help.
Rainbow, do you have any advice on how to load big logos into EPAcoder?

How are you going to fit 300KB into a BIOS?

DHT · Wed Sep 11, 2002 4:30 pm

Good question.
The extracted logo from original 228kb bios is 301kb. Strange? Maybe the logo was compressed into the bios. As I said before, I could not load the logo into the EPAcoder.
Compaq DeskproSB has 512kb bios, and the 16-color compaq.bmp logo is 146kb.
Anyone can help me how to deal with large bios logo?

tomuf · Thu Sep 12, 2002 4:36 pm

Sorry for not answering you, I've been out for 3 days. The file you sent me is AWBM format, which can't be 'converted' to BMP just by editing it - you must use some utility. If there isn't any, I'll try to write one when I have time... But try looking for some utility that converts EPA logo ver 2. (AWBM) you sent me to plain BMP.

DHT · Fri Sep 13, 2002 5:15 pm

I could view it with Awbmread.exe in DOS mode, but could not convert it into bmp