Asus P I-P55T2P4S User Manual - Page 41
Onboard Serial Port 1 / Onboard Serial Port 2
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(Chipset Features) IV. BIOS SOFTWARE DRAM and ECC If all your DRAM modules have parity chips (e.g. 8 chips + 4 parity chips), they are considered 36bits. This motherboard sums the memory per bank and therefore two modules will give 72bits and the following will be displayed: DRAM are 72 bits wide Memory parity SERR# (NMI): DRAM ECC/PARITY Select: If your DRAM modules do not have parity chips (e.g. 8 chips), they are considered 32bits and the following will be displayed instead: DRAM are 64 (not 72) bits wide Memory parity SERR# (NMI): The default of Disabled for Memory parity SERR# (NMI) will not show memory errors on your monitor. When using parity DRAM modules, you can select from the default of Parity or ECC (Error Checking and Correcting) to correct 1 bit memory errors that may occur in the memory. (See pages 12-13 for more information on DRAM memory modules.) Onboard FDC Controller When enabled, this field allows you to connect your floppy disk drives to the on-board floppy drive connector instead of a separate controller card. If you want to use a different controller card to connect the floppy drives, set this field to "Disabled". Default setting is "Enabled". Onboard FDC Swap A: B: This field reverses the drive letter assignments of your floppy disk drives. Two options are available: "No Swap" and "Swap AB". "No Swap" is the default setting. If you want to switch drive letter assignments, set this field to "Swap AB", and the swap will be controlled in hardware. This works separately from the BIOS Features floppy disk swap feature. It is functionally the same as physically interchanging the connectors of the floppy disk drives. Onboard Serial Port 1 / Onboard Serial Port 2 These fields control the assignments for the motherboard's two on-board serial connectors. The following lists the available options: COM1, 3F8H (Onboard Serial Port 1 default) COM2, 2F8H (Onboard Serial Port 2 default) COM3, 3E8H COM4, 2E8H Disabled (Disables the on-board serial ports) IV. BIOS (ChipsetFeatures) P/I-P55T2P4 User's Manual 35