ParkingLotLust
Member
I recently sold my personal Xbox, and just received another one for free from a friend. I plan on running four different BIOS's (4 x 256kb) embedded on the TSOP BIOS chip. Now, instead of having a mechanical switch and picking between two 512kb banks, Id like to have a momentary button that, when pressed, cycles through banks 1, 2, 3, and 4, and lights up the corresponding LED.
For those of you that dont know how to switch between them, two lines are pulled to ground, and whether you pull one, both, or none choose which segment of the BIOS is loaded. Little bit more to help:
**broken link removed**
**broken link removed**
Im not really familiar with binary or hex, so here's my "truth table" of sorts:
Switch 1 = a18
Switch 2 = a19
"On" means grounded
**broken link removed**
Now to the skilled minds here, I'm sure this is pretty simple. However, there is one kicker: it needs to run off 3.3v, as that is the standby voltage available whenever the Xbox is plugged in (the bank has to be chosen before the xbox is turned on).
If it turns out that its going to become really hard to do, or that a microcontroller is a more suitable option, Ill pay someone to write the code and draw out the schematic, as I know zero about coding (anything - C, vB, C#, Java ... Im just not a fan of coding, and other than the tiny projects I wont really need to know it).
Thanks for taking the time to look!
For those of you that dont know how to switch between them, two lines are pulled to ground, and whether you pull one, both, or none choose which segment of the BIOS is loaded. Little bit more to help:
**broken link removed**
**broken link removed**
Im not really familiar with binary or hex, so here's my "truth table" of sorts:
Switch 1 = a18
Switch 2 = a19
"On" means grounded
**broken link removed**
Now to the skilled minds here, I'm sure this is pretty simple. However, there is one kicker: it needs to run off 3.3v, as that is the standby voltage available whenever the Xbox is plugged in (the bank has to be chosen before the xbox is turned on).
If it turns out that its going to become really hard to do, or that a microcontroller is a more suitable option, Ill pay someone to write the code and draw out the schematic, as I know zero about coding (anything - C, vB, C#, Java ... Im just not a fan of coding, and other than the tiny projects I wont really need to know it).
Thanks for taking the time to look!
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