clarity413
10+ year member
Senior VIP Member
I seriously doubt that the cd changer cable is serial if it's just the matter of hooking up the h/d. HD's send data really, really fast. Serial connections send data about 2-3k a second. Anyways, what I would do is buy a cheap pxa255 board/chip wire up a usb 2.0 h/d up to that and use the serial connection from the pxa board to interface with the HU. pxa boards are often used in pdas but the expensive thing on the pda is the lcd touch screen. That's usually about 200-250 to replace in a 400 dollar pda. Also using a pxa board you could have the potential to hook up a touch screen and play movies. With this being said even though pxa255 chips are 400mhz they are low power chips with a lot of shit built into it. It actually runs about 200mhz. You could use netbsd or linux to power this. I would recommend netbsd because there would be less porting to do. You might want to contact your HU's manufactur about it, usually they'll help you out. Anyways, for me to do this it'd take about 2-3 months of working 6-8 hours a day on it. If you have all the tools you need and everything it'd cost about 150-200 bucks. You could find a used/broken ipaq 5xxx for pretty cheap. All you need is the board. You'll haveto make a jtag cable for flashing the rom... It's a lot of work though.
