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AR-B1380/AR-1380A User’ s Guide
Page 66
Available options: 15us, 60us, 120us
RAS Precharge time
The DRAM RAS precharge time.
Available options: 1.5T,2.5T, 3.5T
RAS Active Time Insert Wait
The options sets the DRAM time insert wait: RAS Active and CAS Precharge function setting.
Available options: Enabled, Disabled
CAS Precharge Time insert Wait
Whenever memory reads or writes, it will insert 1T between the falling edges for both RASJ and CASJ, if
D(4) of index 11h is set to high.
Available options: Enabled, Disabled
Memory Write Insert Wait
This option sets the Memory Write Insert Wait
Available options: Enabled, Disabled
ISA I/O High Speed
This option allows the ISA card to operate at a higher ATCLK during specific I/O accessing cycles. The
below table describes the frequency that it can improve.
High Frequency
Normal Frequency( AT Bus Clock)
7.159 MHz
7.159MHz
PCLK2/2
PCLK2/3
PCLK2/3
PCLK2/4
PCLK2/4
PCLK2/5
PCLK2/5
PCLK2/6
PCLK2/6
PCLK2/8
PCLK2/8
PCLK2/10
PCLK2/10
PCLK2/12
Available options: Enabled, Disabled
ISA Memory High Speed
This option allows the ISA card to operate at higher ATCLK during specific memory accessing cycles.
Same as ISA I/O High Speed, the above table describes the frequency that it can improve.
Available options: Enabled, Disabled
ISA Write cycle end insert wait
I/O Recovery / Recovery Period
If
I/O Recovery
Feature options is enabled, the BIOS inserts a delay time between two I/O commands.
The delay time is defined in
I/O Recovery Period option.
Available options for I/O Recovery: Enabled, Disabled
Available options for I/O Recovery: 0 us, 0.25 us, 0.50 us, 0.75 us, 1.00 us, 1.25 us, 1.50 us, 1.75 us, 2.00
us, 2.25 us, 2.75 us, 3.00us, 3.25us, 3.50 us
16Bit ISA Insert Wait
This option enables the 16Bit ISA Insert Wait Function. When the system is at read/write status, it will
insert the wait time to extend the read/write time.
Available options: Enabled, Disable
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