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[aksor]

I got two customers who have a busted TSOP from bad flashing.

I built the 29wire Homebrew tsop using the Am29F040 tsop and put X2 4979 bios

I wired it all up all of the address lines and data lines to the mb and have pin 31 and 32 connected to +5V Vcc and 22-24-and 16 to GND.

When I boot the Xbox the unit still frags rebbots twice then the 3rd time it gives the red/green flash.

Am I missing something here do I have to disable the onboard bios somehow so it does not conflict.

I checked the homebrew pin to pin to make sure I did not F%$k it up and the bios is good.

any help would be appreciated

Thanks

Laz
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[X-Lord]

I have exactly the same problem.
My TSOP is Am29F040B and I've flashed it with Willem eeprom programmer.
Please HELP!!!










Sorry for my English, I'm french  <

[aksor]

Funny I used the same programer.

Did you connect your link32 to +5V?

I think thats what I messed up on.    I forgot to connect the link 32 to VCC.

I will try it out tonight.  I also heard that if you are using a 120ns IC you need to have a 10uF tantalum Capacitor between VCC and Ground (pin 16 goes to - on the cap and pin 32 to + on the cap.

Laz

[dfect]

try using shorter cables,  also try to use better quality cables..

to get mine to work i shortened the cables to the half.

this is another homebrew version.., but i took this pic when i got it working.. the cables i use is taken from IDE cable.

http://dfect.astmatic.net/xray3.jpg

hope this can be of any help..

This post has been edited by dfect: Jan 22 2004, 05:17 PM <

[Zedek]

Holy christ....that looks like a squid.

I just use 30 awg kynar wire wrap and it works fine...  <

[dfect]

hehe, yep..

luckily i got some 30 awg last day that im gonna use next time.

i dont recommend IDE wires.., but it seems to work on shorter distances.. (not longer than this)  <

[aksor]

I shortened the wires still F$%* fraggin.  

The only flash I have on hand is a AM29F040B-120  is there anything else that has to be connected on the MB besides the address , data and power wires.

Is the chip to slow,  I'm pulling my hair out.

Laz
 <

[dfect]

have u resized the bios to 512k bfore u progged it?, just follow the homebrew scheme on xbox-scene's tutorials.

This post has been edited by dfect: Jan 23 2004, 12:33 AM <

[Glex25]

k i use to get that same problem but since i connected pin 31,32,1 on the chip it boots up fine  <

[Zedek]

Yeah, if you have a flash rom you have to wire it like this...

(IMG:http://www.xbox-scene.com/imageserver/ownmod/eprommod1b.jpg)

With 22 & 24 going to 16 and linking 31&32.

Note, there's two wires coming out of the link of 31 and 32.  They both go to seperate points on the board.  One to 5V vcc and another to an address line.  22 and 24 get linked to 16 which is then put to a ground source.  <

[aksor]

<_<

I tried every possible thing when you say that pin 31 and 32 go to VCC and a separate address line are you sure its not the CE on the onboard TSOP. This will disable the onboard Tsop so there is no bus contention.

Is this point by any chance called link32 or if its something else can you please elaborate.

I thing the problem is the flash speed.  I'm using a 120ns unit but will try to scavenge something faster and try it again.

so far still no luck

Laz
 <

[Zedek]

Just out of curiosity, what xbox version MB do you have?  <

[aksor]

Its an version 1.0 with a Hynix 1MB tsop onboard

Laz
 <

[wargod]

Line 31 goes to another point on the board?  Not on a v1.0 box I assume.  The diagrams at pcmerc don't show this.  What point does line 31 go to?  You should be receiving my xbox on the 27th Zedek.  That may have been the problem.  
 <

[Zedek]

The two points 32 goes to in a 1.0 are these...

(IMG:http://www.xbox-scene.com/imageserver/ownmod/eprommod3xs.jpg)

Which would be the 5v VCC and

(IMG:http://www.xbox-scene.com/imageserver/ownmod/eprommod4xs.jpg)

The point on there that says link this point to 32.  That's the second line.  <