I'm trying to use your library with KS0108 display and the Due. I'm using level converters (tx80108 shifter from adafruit), but I can't see anything on the display yet. I have wired everything up according to:
8Bit Com: D0..D7: 8,9,10,11,4,5,6,7 en=18, cs1=14, cs2=15,di=17,rw=16
Do you have any hints on checking the code? I can help to verify it works with KS0108..
Problem is: I can not test the KS0108. I do not have a level shifter. What i can say is, that the KS0108 works great with the UNO and other 5V processors.
The related code is inside "u8g_com_arduino_parallel.c"
Assuming, that your wiring is correct, then maybe the timing is wrong for the Due. So tests could include to add larger delays inside "u8g_com_arduino_parallel.c". Please let me know if you have success here.