May 20 2006, 05:45 AM
I saw that stacked flash mod the other day and thought it looked like ghetto ass. So, partially motivated and nostalgic for the old v1.0/1.1 xbox mods, I thought I'd do my own. No tutorial here, if you are capable of doing this, you don't need anyone to tell you how.
Dual boot 4Mb flash with single wire control (pull-up on A18):
May 20 2006, 08:00 AM
could you give a brief explanation of how it switches between the two? It loks awewome!
Where did you get the parts? Stripped from another mobo or bought new?
May 20 2006, 06:54 PM
Pin 1 (A18) on the socket is bent around before it's put down. That gives you a spot to connect the pull up resistor and control. With the wire unshorted A18 is high, shorted is low providing an MSB bank select. This is the same thing we used to do with the 8Mb flashes on the original xbox. The parts are new, had to wait for them to come in.
The only thing that keeps it from taking less than 5 mins is removing the epoxy, so be glad if you got an old one without it :)
May 20 2006, 07:01 PM
Some of the dual boot methods scared the shit out of me, are they a joke?
I have some 040's on order and the pic chip coded for switching from either bank depending what button you power on from. Switchless switching as it were and a stock looking 360 after itr's in.. Look for the hex code for a cheap chip at a popular scene board near you.
May 20 2006, 07:42 PM
QUOTE(bongwater @ May 20 2006, 07:08 PM)
pic chip coded for switching from either bank depending what button you power on from
Sounds great man I'll be looking for it. Which pic so I can order some?
May 20 2006, 08:21 PM
Nice work! I was thinking of doing it this way myself...looks like you beat me to it.
One question...If I remember correctly, those sockets completely cover the soldering pins...how did you solder it in?
One concern I had with that design was that if you inadvertently had the second bank selected and you tried to flash the rom(with a double firmware) you may screw it up(it'll run out of space). Or am I thinking wrong?
My other idea was to use one of the DIP sockets which are deeper...they may be deep enough to stack two 020 chips in and essentually bus all the points...of course you would need to remove the chip select pin(from the socket) and solder a switch in.
May 20 2006, 09:35 PM
looks way too much effort for whats its worth, desoldering a plcc32 chip is difficult enough without the resin,
id much rather piggyback another memory IC on the back alot cleaner, faster and lower risk, and Ghetto? piggybacking is standard practice in electronics, all that effort to make it look pretty.....pfft get a grip ghetto boy
May 21 2006, 12:47 AM
went to a electronic shop near me askin for one of the IC chips for the dual boot mod and 2 10k pull up resistors, he cudnt get the IC, an he asked what a pull up resistor is, what is it? is it just a normal resistor or what?
May 21 2006, 01:14 AM
Groups like xecuter release ghetto ass mods soldered on top of each other then they design something like my picture and then they put them side-by-side and say...
What if Mr. Face I could save you this mess with a solution like this socket, would that be worth $35 dollars to you Mr. Face?
But no one makes a mess like that from their Xbox drive like that double decker british tour bus. It was probably photoshopped in Xecuter labs for their upcoming what if would you advertising campaign.
Also the 32 pin SM sockets have that table you can just clip the corners out of them and solder with an iron (depending on the socket brand I guess).
Also if you have a bin twice as big as the bank it stops half way through and may report an error but it's still good, in alot of cases. Also just use the right size bin, viola...
May 21 2006, 02:42 AM
is this right:http://plexo.promisance.co.uk/DUALBOOT.JPG
** IMG tag removed. Size your images reasonably or simply link them please **
May 21 2006, 04:25 AM
We are trying to keep this ghetto free, Heeelllppp mods!
Do you really think that is a valid pin numbering system for the SST?
Can you see any difference? You just made up a numbering sytem huh? Keep ghetto trash it's it's own (dead) thread. That ghetto pus infected scab costs twice the price of the 040 design and only 1 line to toggle. Not 4. Do the math and don't get back to me. Your ghetto sized graphic also ruined the thread here, thanks. Mods?
May 21 2006, 08:16 AM
lol PLeXo's pic was a joke
, I thought it was pretty funny.
May 21 2006, 09:56 AM
i got the numbers from littlejonnys mod
thats what dual boot mod im wanting to do, the tutorial isnt very clear lol
May 21 2006, 10:02 AM
QUOTE(bongwater @ May 21 2006, 12:32 PM)
Your ghetto sized graphic also ruined the thread here, thanks. Mods?
PM staff it you have a matter that needs attention please.
May 21 2006, 02:36 PM
Are you Ghetto cause you sure have ghetto on the brain.
Ghetto this Ghetto that .
Ill bet you youll say either Im ghetto or this post is ghetto.
May 22 2006, 05:03 PM
Just a couple notes for anyone else doing this. You need to flash the bios with the block switch and only do 64k at a time or else the whole flash will be erased and you'll only get one bank at a time.
Also since this is using an address line instead of a chip enable it appears to be hot switchable. At least in the minimal amount of testing that I have done.
May 22 2006, 07:01 PM
Have you tried adjusting the bank size in the mtkflash.typ file to indicate the size is 256k on that flashrom? I could see where the internal erase would still erase the whole chip, so this might not work. It'll be hot switchable address lines bounce from 0 to 1 all the time, at least some of them do
May 22 2006, 07:21 PM
Spliting the files into 64k chunks works fine, so I hadn't messed with it beyond that. By hot swappable I mean after the game has booted the dvdrom still works after switching back to the other bank. It doesn't hang the controller. I don't know how much local ram the controller has, maybe 1-2k couldn't find a data sheet, and I have no idea what code is still resident in that local ram when it's switched. No time really to test it properly as of yet.
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