American Megatrends 43 Series User Manual page 59

ADVANCED CHIPSET SETUP Options,
Continued
On Board Floppy Controller
The AMIBIOS detects if an external floppy disk controller is installed in the system. The onboard floppy controller is automatically enabled and disabled
accordingly. The settings are Enabled or Disabled.. Make sure that the floppy cable is connected to J17 on the SX CAT motherboard.
On Board IDE Controller
Enable this option to use the onboard IDE hard disk drive controller. Make sure that the IDE cable is connected to J20 on the SX CAT motherboard. The
AMIBIOS detects if an external hard disk controller is installed in the system. The onboard IDE controller is automatically enabled and disabled accordingly.
However, when using a SCSI or ESDI controller with a built-in BIOS, the autodetect feature may not function properly and the onboard IDE controller must be
disabled ed in ADVANCED CHIPSET SETUP. The settings are Enabled or Disabled.
Low CPU Clock Speed
There are four options available to set the low CPU Clock Speed. If System Boot Up CPU Speed is set to Low in ADVANCED CMOS SETUP, select CXIN,
CXIN/2, CXIN/4, or CXIN/8 in this option. CXIN is the fastest setting; CXIN/8 is the slowest. The BIOS and Power-On defaults are CXIN/2.
Bus Clock Select
This option selects the source of the AT Bus Clock. The settings are PROCLK/4, PROCLK/5, or PROCLK/6. PROCLK is the processor clock, twice the rated
microprocessor speed. For example, PROCLK is 32 MHz for a 16 MHz SX CAT motherboard and 40 MHz for a 20 MHz motherboard. The BIOS and Power-On
defaults are PROCLK/4.