I've been writing a driver for the GPIO as implemented by the FPGA on
the net6501 and I was wondering if someone (Soren?) could clarify the
purpose of some of the I/O ports.
From the archive, I have the following information regarding the GPIO:
I/O Port 0680 bit 15..0 gpio input
From the description, they would appear to be writeable addresses that would
allow you alter select outputs without knowing the current state of the
output. So writing an 0x0080 to 0688 would clear bit 7 to 0 and leave the
others in their current state. Writing 0x0808 to 068c would set bits
* Jed Clear jcl...@speakeasy.net [2013-01-10 20:14:12]:
From the description, they would appear to be writeable addresses that
would allow you alter select outputs without knowing the current state
of the output. So writing an 0x0080 to 0688 would clear bit 7 to 0
and leave the others in
