Homebrew PCBs

"timbomcnuckle" <jaydag71@...> writes:
>  Hey- I wanted to ask DJ,, is your r8c programmer a home built? i am
> looking for such a design as I canot afford to buy one at the
> moment....?

Yup.  You need a serial port and two GPIO (mode and reset).  In
theory, you can do it with a standard rs-232 port with a suitable TTL
level shifter, if you don't mind doing the two GPIO with jumpers (it's
just to get the device reset into program mode, instead of into user
mode).  The protocol is pretty trivial, and well documented.