Dear All:
I'm writting a program to test parallel ports' capability using a
loopback plug. I wrote 'walking 1s' to data & control register, then read
status register's value to compare with that I wrote. For example, I wrote
0x1 0x2 0x4 0x8 0x10 to data and control port, I expected the loopback data
read from status port would be proper value. But every time there'd be two
value not fited. After I set SPP mode in CMOS, the result's
no better, only one error reduced. Can you tell me the reason why? Thanks
BEST REGARGS
wangxiangyu
20010925.
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