
PEPAR	- Port E Pin Assignment
Addr $fffa17
Normal value 0 - all pins are used as I/O pins

DDRE	- Data Direction Reg of port E 
Addr $fffa15
normal value $07
[0..2] - output
[3..7] - input

PORTE0, PORTE1 Port E data reg
Address $fffa11, $fffa13
  
0 \
1  > kbd scan lines (output, active low) 
2 /	
3 \ 
4  \
5   > kbd scan rows (input)
6  /
7 /


