David P. Reed wrote:
Note that I can run the port 80 test once, the second time I get the
hard freeze. I didn't try writing to port 70 from userspace - that
one's dangerous, but the reading of it was included for a timing typical
of a chipset supported device. These are all pretty consistent.
I find the "read" timing from 0x80 verrrrry interesting. The write
timeing is also interesting, being faster than an unused port.
Once again: reading from port 0x80 goes to the DMA page device.
-hpa
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