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Xbox-Hq.Com :: View topic - How To Flash a 256kb Bios To a 512kb Chip
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GabrielK
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Post Posted: Fri Jan 18, 2019 9:18 am   
Post subject: How To Flash a 256kb Bios To a 512kb Chip
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Hi all, I have an AMD Duo X2 GS modchip with 2 banks of 512kb each I was able to flash X2 5035 it being 512kb but I would like to try other Bios's that are 256kb, I am using Heimdalls Hexen disk from 2019 and I think I read somewhere that if im using the Hexen disk it will automatically do its magic putting a 256kb onto a 512kb flash bank, is this correct? Otherwise how does one do this?
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kaos_engr
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Post Posted: Fri Jan 18, 2019 10:52 am   
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If it uses Evoxdash to flash the BIOS, it will automatically double a 256KB BIOS to fit the 512KB of your bank. GentooX used for a Winbond flash chip does not resize the BIOS's dot bin file.

You can also create a 512KB dot bin file at a DOS prompt (CMD.EXE window):

  • copy /b 256KB_bios_name.bin+256KB_bios_name.bin new_512KB_bios.bin

Note: Do not forget the /b option else you'll have a mess on your hands flashing a BAD BIOS. The most significant bit (MSB) of every byte will be dropped (an ASCII copy will be made instead of a BINARY copy.)

or with Team Xecuter's Xecuter 2 BIOS Manager (X2BM) WIndows application.


Last edited by kaos_engr on Fri Jan 18, 2019 11:10 am; edited 1 time in total


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GabrielK
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Post Posted: Fri Jan 18, 2019 11:09 am   
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To keep things simple for me will the Hexen disk automatically resize the bios for my modchip? ie 256kb to 512kb?
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kaos_engr
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Post Posted: Fri Jan 18, 2019 11:12 am   
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GabrielK wrote:
To keep things simple for me will the Hexen disk automatically resize the bios for my modchip? ie 256kb to 512kb?


If you use the non-Winbond menu option, YES!


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GabrielK
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Post Posted: Fri Jan 18, 2019 12:59 pm   
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Thanks you Kaos_engr for your replies to both my posts in here and onother with your help im now going to flash a 256kb bios to my 512kb chip.
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