After inputting the above program, I get following results
dav: 0
nrfd: 0
ndac: s/b 0 is 1
atn: no transition detected
dio:
in = 0 out = 255 : 11111111
in = 1 out = 255: 11111111
and so on in = 2,4,8,16,32,64,128,255 out is always 255 followed by same eight 11111111
Computer is 8032. It...