Advanced Chipset Setup - American Megatrends Enterprise-III User Manual

ADVANCED CHIPSET SETUP Options,
I/O Recovery Select
This option sets the length of time that the system has to recover after an I/O operation.
I/O recovery time is extremely important, especially if an 80486DX2 CPU is installed. If I/O
recovery time is insufficient, device drivers (particularly those for Unix and Xenix) will fail.
The settings are 3 BCLKs, 4 BCLKs, 5 BCLKs, or 11 BCLKs. The setting of this option is related to
the processor speed, as shown in the following table.
The BIOS and Power-On default is 11 BCLKs.
Enterprise-III EISA VLB Motherboard User's Guide
If the CPU type and
speed is...
25 MHz 80486DX
33 MHz 80486DX
50 MHz 80486DX
50 MHz 80486DX2
66 MHz 80486DX2
Continued
choose...
3 BCLKs
5 BCLKs
5 BCLKs
11 BCLKs
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