Contec BUF-PCI(PC) User Manual page 89

Programming
Bus signal set register (+FCh) [output]
D7 D6 D5 D4 D3 D2 D1 D0
+252 Refresh Self-test
0 0 0 I/O Wait 2 I/O Wait 1 I/O Wait 0
(+FCh) Enable IOCS16EN
I/O wait 2 - I/O wait 0
Set the I/O wait. Normally, use it set at 2wait [010].
A maximum I/O wait of one microsecond is permitted in the cycle in
which an I/O wait is generated from a board mounted in the I/O
expansion unit. As the I/O wait reaches one microsecond, the cycle is
forced to terminate.
If the I/O wait is set to 0 wait [000], the I/O wait request signal is
ignored. When the power is turned on, the I/O wait defaults to 0 wait
[000].
Self-test IOCS16EN
This setting is for self-testing of the BUF-PC(PCI). Specify whether
the I/O register for self-testing is to be accessed with the 16- or 8-bit
cycle. Output of 1 results in the 16-bit cycle. For other than self-testing,
use this setting at 8-bit cycle 0. When the power is turned on, the cycle
defaults to 0.
For the BUF-PCI(98), set self-testing to 0.
Refresh Enable
Specify whether to enable or disable the refresh signal on the I/O
expansion unit side.
Setting to 1 results in output of the refresh signal.
When the power is turned on, the setting defaults to 0 and no refresh
signal is output.
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BUF-PCI(PC), BUF-PCI(98)