HP Workstation x2000 hp workstation x2000 - Technical Reference and Troublesho - Page 91

HP BIOS BIOS Addresses BIOS Addresses This section provides a summary of the main features of the HP system BIOS. This is software that provides an interface between the computer hardware and the operating system. For the procedure to update the system ROM firmware, see page 86. System Memory Map Reserved memory that accessory boards use must reside in the area from C8000h to EFFFFh. 0000 0000 - 0000 03FF 0000 0400 - 0000 04FF 0000 0500 - 0009 FC00 0009 FC00 - 0009 FFFF 000A_0000 - 000B_FFFF 000C 0000 - 000C 7FFF 000C 8000 - 000F FFFF 000E 0000-000F FFFF 0001 0000-000F FFFF 0010 0000-001F FFFF 0020 0000-003F FFFF 0040 0000-007F FFFF 0080 0000-7FFF FFFF FECO 0000 FEEO 0000 FFF8 0000-FFFF FFFF Real-mode IDT BIOS data area Used by operating system Extended BIOS data area Video RAM or SMRAM (not visible unless in SMM) Video ROM (VGA ROM) Adapter ROM, RAM, memory-mapped registers, BIOS 128KB BIOS (Flash/Shadow) Memory (1MB to 16MB) Memory (16MB to 32MB) Memory (32MB to 64MB) Memory (64MB to 128MB) Memory (128MB to 2GB) I/O APIC Local APIC (each CPU) 512KB BIOS (Flash) Chapter 3 91