Honored Contributor
Honored ContributorThat helped me a-lot to. I was having the same PIN_W20 problem on my DE1 board.
At: http://www.cs.columbia.edu/~sedwards/apple2fpga/ is an implementation of an Apple ][+ on a DE2 which I changed to work on my DE1 board. I changed the pinouts in DE2_TOP.qsf ((pinout file) I guess I should rename it to DE1) and changed DE2_TOP.vhd And now it works!!!!!. I set switch 9 to be reset. switch 0 is color/bw The lo-res colors are a-little off(unless u want more blues and greens) and also the hi-res graphics doesn't set the colors exactly correct (any two bits next to each other should be white not counting bit-7 in each byte aka palette bit) so I'll have to see about fixing that. Also something screwy on 1st byte on just a few of the hires graphics lines probably related to weird apple ][ screen memory mapping. I think I'll put a link to that apple ][ project with a copy of the two files I changed and how to fix the pin_w20 issue on my webpage: http://alumni.cse.ucsc.edu/~fkilner in a bit. Thanks for posting how to fix PIN_W20 problem :-) -Fred --- Quote Start --- Moin, Thanks a lot for the above hint! I run into the same trouble and i don't want to know, how many time i would have needed to find out myself :) Cheers, WK --- Quote End ---
