Lanner electronic FW-7650 Manuale Utente

 

between the CAS and RAS strobe signals, used when DRAM is written to, read from, or 
refreshed. Fast gives faster performance. This field applies only when synchronous 
DRAM is installed in the system. 

 

    If an insufficient number of cycles is 

allowed for the RAS to accumulate its charge before DRAM refresh, the refresh may be 
incomplete and the DRAM may fail to retain data. Fast gives faster performance; and 
Slow gives more stable performance. This field applies only when synchronous DRAM 
is installed in the system. 

Selecting “Enabled” allows caching of the system 

BIOS ROM at F0000h – FFFFFh, resulting in better system performance.  However, if 
any program writes to this memory area, a system error may result.  The settings are 
“Enabled” and “Disabled”. 

 

 Selecting Enabled allows caching of the video BIOS 

ROM at C0000h to C7FFFh, resulting in better video performance.  However, if any 
program writes to this memory area, a system error may result. 

Memory Hole At 15M-16M: 

You can reserve this area of system memory for 

ISA adapter ROM. When this area is reserved, it cannot be cached. The user information 
of peripherals that need to use this area of system memory usually discusses their 
memory requirements. 

Select the size of the Accelerated Graphics Port (AGP) 

aperture.  The aperture is a portion of the PCI memory address range dedicated for 
graphics memory address space.  Host cycles that hit the aperture range are forwarded to 
the AGP without any translation