
PFPAR	- Port F Pin Assignment
Addr $fffa1f
Normal value $26 
[0,3,4,6,7] - IO
[1,2,5] - alt signal

DDRF	- Data Direction Reg of port F
Addr $fffa1d
normal value $d9
[0,3,4,6,7] - output
[1,2,5] - input

PORTE0, PORTE1 Port E data reg
Address $fffa19, $fffa1b
  
0 - output pin ???? (tied thru 10k resistor to ground see MODCLOCK)
1 - IRQ 1
2 - IRQ 2
3 - kbd scan line (output)
4 - kbd scan line (output)
5 - IRQ 5
6 - output to ???
7 - output to ???



