We are trying to use the PC104 bus to stream data to an FPGA.
We need to speed up the bus timings and so we are adjusting the
0xE800000C register.
Either the Preliminary manual online is just plain wrong or I don't
have all the setup correct.
We've setup the connector to be in PC104 rather than GPIO mode:
0x55555555 to address 0xE8000030
0x55555555 to address 0xE8000034
0x55555 to address 0xE8000038
0x55555 to address 0xE800003C
The manual suggests bits 5-0 adjust strobe length, 9-6 adjust setup,
and some other bits adjust err other bits. But none of the settings
work properly.
For example the manual states:
"The minimum (when bits are zero) is 20ns"
Well I've tried settings bits 5:0 over the full range of 0x3F downto
0x00 and mine is sitting here generating a 10ns strobe, for ANY
setting of the register.
The clock on-off control doesn't work either.
My default was to be: 0x1CC5
Has anyone else adjusted their timings with any success? I've emailed
technologic three times and had no response.
Regards
Marc
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