Init Display First; Ide Hdd Block Mode - Aaeon PCM-6892 Manual

Primary/Secondary Master/Slave PIO
The four IDE PIO (Programmable Input/Output) fields let you set a
PIO mode (0-1) for each of the two IDE devices and the two storage
devices that the onboard IDE interface supports. Modes 0 through
4 provide successively increased performance. In Auto mode, the
system automatically determines the best mode for each device.
The choices: Auto, Mode 0, Mode 1, Mode 2, Mode 3, Mode 4
Secondary Master/Slave PIO reserves for future purpose
Primary/Secondary Master/Slave UDMA
Ultra DMA33/66/100 implementation is possible only if your IDE
hard drive supports it and the operating environment includes a
DMA driver. If your hard drive and IDE cable both support Ultra
DMA 33/66/100 select Auto to enable BIOS support.
The choices: Auto, Disable.
Secondary Master/Slave UDMA reserves for future purpose

Init Display First

You can select AGP or PCI slot to initialize it as the primary display
before initializing any other display device on the system.
The choices:AGP, PCI Slot

IDE HDD Block Mode

Block mode is also called "block transfer", "multiple commands", or
"multiple sector read/write". If your IDE hard drive supports block
mode (most new drives do), please select "Enabled" for automatic
detection of the optimal number of block read/writes per sector the
drive can support.
The choices: Enabled, Disabled.
56 PCM-6892 User Manual