ADLINK CoreModule 435 - Manual (Page 28)

Chapter 3 Hardware
22 Reference Manual CoreModule 435
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.
I/O Address Map
Table 3-4 shows the I/O address map. These are DOS-level addresses. The OS typically hides these physical
addresses by way of memory management.
Table 3-3. 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
Table 3-4. I/O Address Map
Address (hex) Subsystem
0000-000F Primary DMA Controller (#1)
0020-0021 Master Interrupt Controller (#1)
0040-0043 Programmable Interrupt Timer (Clock/Timer)
0060 Keyboard Controller
0061 ISA Standard Port B
0063 ISA Standard Port B alias
0064 Keyboard Controller
0065 ISA Standard Port B alias
0067 ISA Standard Port B alias
0069 ISA Standard Port B alias
006B ISA Standard Port B alias
006D ISA Standard Port B alias
006F ISA Standard Port B alias