User`s guide

T-MOPSlcdSA User's Guide
Appendix B: BIOS Operation 58
58
19.8.3 North Bridge Configuration Submenu
Feature Option Description
Refresh Cycle Time 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
10, 11, 12, 13, 14, 15
Sets the refresh cycle time for SDRAM.
Kontron recommends using the default value of 8.
RActive to Read/Write 0, 1, 2, 3, 4, 5, 6, 7 Sets the RAS active to read/write time for SDRAM accesses.
Kontron recommends using the default value of 3.
Precharge To Row Active 0, 1, 2, 3 Sets the precharge to row active delay time for SDRAM
accesses. Kontron recommends using the default value of 3.
CAS Latency 2, 3 Sets the CAS latency time for SDRAM accesses. Kontron
recommends using the default value of 2.
MEM16_OE 8mA
16mA
Sets driver current for SDRAM interface.
Kontron recommends using the default value of 8mA.
Read Clock Delay Programming 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
10, 11, 12, 13, 14, 15
Sets the refresh cycle time for SDRAM.
Kontron recommends using the default value of 8.
PCI Standard PCI 2.0
PCI 2.1
Sets the PCI Bus compatibility to standard 2.0 or 2.1.
PCI 2.1 is recommended; however, users may need to set
some none PCI 2.1 add-on cards to PCI 2.0.
PCI to Host Read Prefetch Disabled
Enabled
Disabled/Enabled: Switches read buffering for PCI to Host
accesses off or on.
PCI to Host Write Posting Disabled
Enabled
Disabled/Enabled: Switches write buffering for PCI to Host
accesses off or on.
Notes: In the Option column, bold shows default settings.
19.8.4 ISA Bus Configuration Submenu
Feature Option Description
ISA Write Posting Disabled
Enabled
Disabled/Enabled.
Switches the PCI to ISA write buffering off or on.
Kontron recommends using the default value of Enabled.
ISA Read Buffer Disabled
Enabled
Disabled/Enabled.
Switches PCI to ISA read buffering off or on.
Kontron recommends using the default value of Enabled.
ISA Extra Wait States Disabled
Enabled
Disabled/Enabled.
Switches additional ISA wait states off or on.
Users can enable this feature with slow ISA extension cards
DMA Clock ISACLK / 2
ISACLK
Sets clock of ISA DMA operation. ISACLK is set in this
table under feature ISA Clock. Kontron recommends
using the default value of ISACLK.
DMA MEMR#-IOW# Delay Disabled
Enabled
Disabled/Enabled.
Switches the extra delay for DMA accesses off or on.
Kontron recommends using the default value of Disabled.
16-bit DMA Wait States 1, 2, 3, 4 Sets wait states for 16-bit ISA DMA accesses.
8-bit DMA Wait States 1, 2, 3, 4 Sets wait states for 8-bit ISA DMA accesses.
Notes: In the Option column, bold shows default settings.