Ibm All-in-One Super7 Single Board Computer PCM-5896 Manuel d'utilisateur Page 71

  • Télécharger
  • Ajouter à mon manuel
  • Imprimer
  • Page
    / 128
  • Table des matières
  • MARQUE LIVRES
  • Noté. / 5. Basé sur avis des utilisateurs
Vue de la page 70
Chapter 3 Award BIOS Setup 59
Shadowing copies firmware from ROM into system RAM, where
the CPU can read it through the 16-bit or 32-bit DRAM bus.
Firmware not shadowed must be read by the system through the 8-
bit X-bus. Shadowing improves the performance of the system
BIOS and similar ROM firmware for expansion peripherals, but it
also reduces the amount of high memory (640 KB to 1 MB) avail-
able for loading device drivers, etc.
Enable shadowing into each section of memory separately. Many
system designers hardwire shadowing of the system BIOS and
eliminate a System BIOS Shadow option.
Video BIOS shadows into memory area C0000-C7FFF. The remain-
ing areas shown on the BIOS Features Setup screen may be
occupied by other expansion card firmware. If an expansion
peripheral in your system contains ROM-based firmware, you need
to know the address range the ROM occupies to shadow it into the
correct area of RAM.
Vue de la page 70
1 2 ... 66 67 68 69 70 71 72 73 74 75 76 ... 127 128

Commentaires sur ces manuels

Pas de commentaire