I've got a Silicon Valley Bus Company product called the KeyStone that's WAY more simple than what you're cobbling together. Do you want some piccies of the PCB? IIRC, when I got mine, it was for:
PC Serial Mouse & Original PC KBD Connectors -> ADB
The only problem with KVMing it was that you'd need to run ADB Reset whenever switching to another Mac (you'd need an expensive KVM with KBD/Mouse emulators onboard to get around that simply fixed prob.) to get the "ADB" devices (mostly the mouse) to perform w/o flakiness.
http://www.tifaq.org/mice/accessories.html#Silicon%20Valley%20Bus
I didn't scour their site for info, I doubt they still produce it, but they might be as helpful to you as they were to me if you were to ask one of their engineers VERY nicely. I think it must be a much bigger company now than it was back in the day, but it might be worth a shot to ask for any old ADB info (maybe even a lil' source code that they've got on floppy somewhere) they don't intend to use anymore. [
] ]'>
PC Serial Mouse & Original PC KBD Connectors -> ADB
The only problem with KVMing it was that you'd need to run ADB Reset whenever switching to another Mac (you'd need an expensive KVM with KBD/Mouse emulators onboard to get around that simply fixed prob.) to get the "ADB" devices (mostly the mouse) to perform w/o flakiness.
http://www.tifaq.org/mice/accessories.html#Silicon%20Valley%20Bus
I didn't scour their site for info, I doubt they still produce it, but they might be as helpful to you as they were to me if you were to ask one of their engineers VERY nicely. I think it must be a much bigger company now than it was back in the day, but it might be worth a shot to ask for any old ADB info (maybe even a lil' source code that they've got on floppy somewhere) they don't intend to use anymore. [
] ]'>