A. memory & i/o maps, A.1 memory mapping – Kontron AT8050 User Manual

Page 137

A-1

www.kontron.com

A. Memory & I/O Maps

A.1

Memory Mapping

Address

Function

00000-9B7FF

0-622 KB DRAM

9B800-9FFFF

622KB - 640 KB XBDA; USB Legacy / BIOS Stack

A0000-BFFFF

Video DRAM

C0000-DBFFF

Optional ROM (Free)
LAN BIOS around 30KB if activated, address may vary
External Fiber Channel BIOS 18KB-64KB , address may vary

E0000-FFFFF

System BIOS

100000-PCI Memory

DRAM available

1MB to top of DRAM

System BIOS

See detailed map

to the right

0 - 622KB DRAM

Optional ROM (free)

Video DRAM

SAS BIOS

(18KB at runtime)

(if activated)

LAN BIOS (if activated) (~30KB)

100000h

A0000h

FFFFFh

E0000h

See Note 1

C0000h

A0000h

Note 1 : LAN BIOS address may vary

Note2: SAS BIOS address may vary.
Size is only 2KB if no device.

Optional ROM (Free)

See Note 2

XBDA; USB Legacy / BIOS Stack