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FRAG Bios Cerbios..


Darkspade
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sorry i know this is another FRAG Post,,, didn't want to highjack the one from the 12th or 14th... 

ok Xbox 1.0 1mb, Flash Tsop with Cerbios 256k with restoox. FRAG xbox... Did the Coma fix, needed both A18/A19 for it to Boot.. flashed Cerbios 2.01 1mb, Cerbios 2.2R 256k, Ind 1mb(not same times) .With Xblast, Evo from OG installer disc, OGXBox TSOP Flasher v1.7.2 thru install.xbe from E:\ .. But once I remove the A18/A19 it won't boot.. I'm I supposed to Leave this for good? or Remove it once it's booted before I Flash? 

also With Cerbios won't see DVD now that i changed after Evo flash.. so i Changed this to 0 but now get the error? I can pull cerbios.ini off hdd.. just thought this was weird

; Drive Setup 
; 0 = HDD & DVD,  1 = HDD & No DVD (Legacy Mode), 2 = HDD & No DVD (Modern Mode), 3 = Dual HDD 
DriveSetup = 1  .. I seen a post about this to somewhere in my searching time for a fix... can't find it now
 

Thanks for any help on this.. I just need to stick to Chips lol... 

Edited by Darkspade
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sorry i know this is another FRAG Post,,, didn't want to highjack the one from the 12th or 14th... 

ok Xbox 1.0 1mb, Flash Tsop with Cerbios 256k with restoox. FRAG xbox... Did the Coma fix, needed both A18/A19 for it to Boot.. 

Here's your problem.  You have a 1MB flash and only wrote 1 copy of the BIOS to the first 256KB of it.

Resctoox does not resize the BIOS to fit the entire flash memory chip.

Other applications like XBlastOS XBE edition or Evoxdash do. They write 4 copies of the 256KB dot bin file to fill the entire chip.

You can use the COMA console fix that grounds A18 and A19 to force booting from only the first 256KBs of the 1MB TSOP flash memory chip on the motherboard.

https://web.archive.org/web/20090203223828/http://www.llamma.com/xbox/Repairs/ComaConsole.htm

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On 6/1/2022 at 3:53 PM, Darkspade said:

flashed Cerbios 2.01 1mb, Cerbios 2.2R 256k, Ind 1mb(not same times) .With Xblast, Evo from OG installer disc, OGXBox TSOP Flasher v1.7.2 thru install.xbe from E:\ .. But once I remove the A18/A19 it won't boot.. I'm I supposed to Leave this for good? or Remove it once it's booted before I Flash?

To flash the entire 1MB of the chip you first need to remove the grounding straps added for the Coma Console Fix.  With them grounded, you are writing to the first 256KBs of the TSOP 4 times when flashing a 1MB file.  You are forcing A18 and A19 to always be tied to a logic 0 value. 

Binary Addressing of a 1MB Flash Memory Chip

00000000000000000000 binary = Address 0 Base 10
... through ...
11111111111111111111 binary = Address 1,048,575 Base 10

However, with A19 and A18 grounded only the first 256KBs can be accessed.

AA
11  - forced low address bits. 
98
---------------------
00 000000000000000000 binary = Address 0 Base 10
... through ...
00 111111111111111111 binary = Address 262,143 Base 10

I suggest soldering two wires - one to A18 and another to A19 that you can touch to the RF shield inside the case to boot the BIOS stored in the first 256KBs of the flash. After the console has booted, move them away from the shield so they are no longer touching anything then flash with XBlastOS or Evoxdash any of the CerBIOS's dot bin files; 256KB, 512KB or 1MB. Those two applications' flashing procedures write multiple copies as required to fill the entire flash memory chip.  If you flash the TSOP with Resctoox make sure you use the correct sized dot bin file to fill the entire TSOP memory chip.  v1.0 and v1.1 Xboxes use a 1MB TSOP while v1.2-1.4 Xboxes only have a 256KB TSOP flash memory chip.

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35 minutes ago, KaosEngineer said:

To flash the entire 1MB of the chip you first need to remove the grounding straps added for the Coma Console Fix.  With them grounded, you are writing to the first 256KBs of the TSOP 4 times when flashing a 1MB file.  You are forcing A18 and A19 to always be tied to a logic 0 value. 

Binary Addressing of a 1MB Flash Memory Chip

00000000000000000000 binary = Address 0 Base 10
... through ...
11111111111111111111 binary = Address 1,048,575 Base 10

However, with A19 and A18 grounded only the first 256KBs can be accessed.

00000000000000000000 binary = Address 0 Base 10
... through ...
00111111111111111111 binary = Address 262,143 Base 10

I suggest soldering two wires - one to A18 and another to A19 that you can touch to the RF shield inside the case to boot the BIOS stored in the first 256KBs of the flash. After the console has booted, move them away from the shield so they are no longer touching anything then flash with XBlastOS or Evoxdash any of the CerBIOS's dot bin files; 256KB, 512KB or 1MB. Those two applications' flashing procedures write multiple copies as required to fill the entire flash memory chip.  If you flash the TSOP with Resctoox make sure you use the correct sized dot bin file to fill the entire TSOP memory chip.  v1.0 and v1.1 Xboxes use a 1MB TSOP while v1.2-1.4 Xboxes only have a 256KB TSOP flash memory chip.

Ok thats Kinda what I figured about the A18/A19. I Kept telling myself its only the 1st bank.. Thanks for the Clarification...   

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3 hours ago, KaosEngineer said:

To flash the entire 1MB of the chip you first need to remove the grounding straps added for the Coma Console Fix.  With them grounded, you are writing to the first 256KBs of the TSOP 4 times when flashing a 1MB file.  You are forcing A18 and A19 to always be tied to a logic 0 value. 

Binary Addressing of a 1MB Flash Memory Chip

00000000000000000000 binary = Address 0 Base 10
... through ...
11111111111111111111 binary = Address 1,048,575 Base 10

However, with A19 and A18 grounded only the first 256KBs can be accessed.

00000000000000000000 binary = Address 0 Base 10
... through ...
00111111111111111111 binary = Address 262,143 Base 10

I suggest soldering two wires - one to A18 and another to A19 that you can touch to the RF shield inside the case to boot the BIOS stored in the first 256KBs of the flash. After the console has booted, move them away from the shield so they are no longer touching anything then flash with XBlastOS or Evoxdash any of the CerBIOS's dot bin files; 256KB, 512KB or 1MB. Those two applications' flashing procedures write multiple copies as required to fill the entire flash memory chip.  If you flash the TSOP with Resctoox make sure you use the correct sized dot bin file to fill the entire TSOP memory chip.  v1.0 and v1.1 Xboxes use a 1MB TSOP while v1.2-1.4 Xboxes only have a 256KB TSOP flash memory chip.

shes alive again.. Thank you very much

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