I've been thinking about loads of different tings to do with the empty space where my UMD-drive used to be, and I've come down to the idea that involves 4x Memorystick ports/slots with a 7 channeled switch to switch between the Memorycards, and leds showing which MemoryCard is currently in use.
Made a pic to illustrate the idea, so you can better understand what I'm talking about.
(found the orginal memorystick pinout here on acidmods.com. made my own, but thanks.)So, its basically almost like the cr-3100, only with 4, instead of 2 slots. Also, the PSP won't be able to read ALL the MemoryCards at once, like with the cr-3100, but you have to switch between the cards manually. I might have to make some adjustments to the umd-door itself to be able to make enough room, but I don't think its that big a deal.
As you can see with the switching system, there are 7 different positions. The MemoryCards are on position #1, #3, #5 and #7, and there's a "deadzone" on position #2, #4 and #6 simulating the effect of taking out your memorycard and replacing it with another one when using the switch.
All the wires and cables and such, will be placed internally. The switch itself will be put at the very top inside the UMD compartment, if you don't come across a better idea for positioning it.
The thing is that I'm not a good one for making schematic/wire-diagrams, and I don't have the necessary items/tools to make a printed circuit board (PCB), so I'm currently on my knees begging for some help here
Constructive criticism is highly welcome
Thanks in advance
-Strife