i have my own board and have used all the 1-bit ports so i would like to use a couple free 4 bit ports so that my stdio stuff like printf() and getc() still work. from what i can tell, you can alter the .XN file to use the ports you want but how does that apply to multibit ports? does output (e.g. printf) drive every bit on a 4-bit port? does input (e.g. getc) require every input pin to have matching values? finally, is the stdio protocol used UART? if not, what is it?
thanks.
changing stdio target ports
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