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Chapter 3 Hardware

CoreModule 430 Reference Manual 17

Memory Map

The following table provides the common PC/AT memory allocations. These are DOS-level addresses. The

OS typically hides these physical addresses by way of memory management. Memory below 000500h is

used by the BIOS.

Table 3-1. Memory Map - Vortex 86SX/DX Processor

Base Address Function

00000000h - 0009FFFFh Conventional Memory

000A0000h - 000AFFFFh Graphics Memory

000B0000h - 000B7FFFh Mono Text Memory

000B8000h - 000BFFFFh Color Text Memory

000C0000h - 000C7FFFh Standard Video BIOS

000D0000h - 000DFFFFh Reserved for Extended BIOS

000E0000h - 000EFFFFh Extended System BIOS Area

000F0000h - 000FFFFFh System BIOS Area (Storage and RAM Shadowing)

00100000h

- Top of

DRAM

Main DRAM Range

FFFC0000h -

[for SX

processor]

FFE00000h -

[for DX

processor]

FFFFFFFFh System Flash

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 55 56

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