IBM 2193 - Manual (Page 89)

BIOS Setup configuration 6-11
Ultra DMA (Direct Memory Access)
Ultra DMA provides a faster data transfer rate between the IDE devices and your
system than the conventional DMA mode. You can enable it by selecting the Auto
option or disable it by selecting disable.
IDE Burst Mode
This setting determines the acceleration of data transfer for IDE devices.
IDE Data Port Post Write
This setting determine the data transfer in the manner of "post write" feature
IDE HDD Block Mode
This setting determines the automatic detection of the optimal number of block
Read/writes per sector that the hard drive could support.
Video Setup
Select this menu item to modify the video settings.
Init Display First
Use this setting to specify which video subsystem to initialize first.
System Shared Memory Size
Use this setting to select whether 4MB, 8MB, 16MB, 32MB or 64MB of system
memory is to be used by video.
PS/2 Mouse Detect Function
Use this setting to determine whether or not the power-on self test will check to see
if a mouse is attached to the mouse connector.
PCI slot Specifies a video card in a PCI slot
Onboard Specifies the video subsystem on the system board