Posted By
Litwr
on 2013-03-01
08:06:59
|  Re: Dead TEDs and plus 4 keyboard
I've just checked Raspberry Pi documentation. It has GPIO which consists of 8 bit bidirectional i/o port and a serial port. So the main problem will be only the proper connector and a small piece of code for the emulator. There are several minor problems. GPIO uses 3.3V logic but it should (?) be compatible with 5V. GPIO may handle only up to 0.016A current. These problems look simple for the electronic solution.
BTW It looks like this Raspberry with proper software (ported from C1541EMU or 1541u) and easy cable may make obsolete all other solutions. It may give 100% 1541 compatibility plus a lot of functions realized by power of RISC CPU and 512 MB RAM.
IMHO I can even think that 700-1000MHz CPU can emulate all +4 chips electronics and produce via proper port with several dozen wires all signals of TED, CPU, RAM (any size will be available!), ... 
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