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OG Xbox Forums => Modchip Forums => TSOP flashing => Topic started by: xboxnewbie123 on January 13, 2004, 03:41:00 AM

Title: Bios Sizes
Post by: xboxnewbie123 on January 13, 2004, 03:41:00 AM

Hey guys,
I know this may have been answered multiple times in here before, but could someone give a quick rundown of the bios sizes for the diff versions of the xbox?

I know that v1.4 and v1.5 are 256K..and pretty sure that v1.3 is 256K..right?
And the 1.0 is a 1 Meg chip.
What about the 1.1 and 1.2?  

Thanks.  <

Title: Bios Sizes
Post by: lordvader129 on January 13, 2004, 04:28:00 AM

1.0-1.1 are 1mb

all others are 256k

 <

Title: Bios Sizes
Post by: xboxnewbie123 on January 13, 2004, 04:32:00 PM

k, thanks..  <

Title: Bios Sizes
Post by: RedBeacon on January 15, 2004, 12:44:00 PM

Hi, I'm just a bit confused on the size of the bios, could someone please explain to me:
I got a v1.4 or 1.5 xbox, with a winbond chip and I read a a lot of posts including this post which told me that my winbond bios chip is 256k in size.
A couple of nights ago, I successfully flashed my onboard bios with raincoat .501 using the Xecuter 256K bios, however, before I flashed my onboard bios, I did a backup of the bios.  This morning when I checked the backup file of the bios and it is 1Meg in size. :uhh:

So my questions are:
1. Is my bios chip really is 256K in size?
2. If it is 256K then why the backed up bios file "bios.bin" is 1Meg in size?

Thanks in advance.  <

Title: Bios Sizes
Post by: ideas_man69 on January 15, 2004, 01:36:00 PM

when you do a backup with evox.. it will always make the bios.bin file 1m. it just means its got the 256k bios x 4 in it.   <

Title: Bios Sizes
Post by: mark876543 on February 26, 2004, 03:58:00 AM

So if I am flashing an old v1.0 or 1.1 box (1mb bios) using Evox, if I flash with a 256k bios will Evox fill it by writing 4x?  Same question with raincoat 0.5, will it fill up a 1mb bios with 4x 256k or do I have to make a 1mb bios to match the chip?

If you use a 256k .bin to flash a 1mb bios and it only writes over 1/4 of it... that's something that could happen right?  and we need to avoid it?  <

Title: Bios Sizes
Post by: terrorvis on February 26, 2004, 04:13:00 AM

EvolutionX resizes the bios to the correct size.
Raincoat 0.3 does NOT resize the bios.
Raincoat 0.5/0.501 do NOT resize the bios.
Raincoat 0.6 can resize the bios.
Raincoat 0.7 always resizes the bios.

Hope that clears it up.

QUOTE

If you use a 256k .bin to flash a 1mb bios and it only writes over 1/4 of it... that's something that could happen right? and we need to avoid it?

Correct we do need to avoid this, although there are ways of fixing it later (switches and/or chips), best to do it right first time.

This post has been edited by terrorvis: Feb 26 2004, 12:14 PM <