Ampro Corporation Littleboard 550 Manuel D’Utilisation
Chapter 3
Hardware
24
Reference Manual
LittleBoard 550
Table 3-2. Memory Map
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
000F0000h -
000FFFFFh
System BIOS Area (Storage and RAM Shadowing)
00100000h
-
04000000h
Extended Memory (If onboard VGA is enabled, then the amount
of memory assigned is subtracted from extended memory)
of memory assigned is subtracted from extended memory)
FFF80000h -
FFFFFFFFh
System Flash
I/O Address Map
Table 3-3 shows the I/O address map.
Table 3-3. I/O Address Map
Address (hex)
Subsystem
000-00F
Primary DMA Controller
020-021
Master interrupt Controller
040-043
Programmable Interrupt Timer (Clock/Timer)
060-06F
Keyboard Controller
070-07F
CMOS RAM, NMI Mask Reg, RT Clock
080-09F
DMA Page Registers
092
Fast A20 gate and CPU reset
094
Motherboard enable
102
Video subsystem register
0A0-0BF
Slave Interrupt Controller
0C0-0DF
Slave DMA Controller #2
0F0-0FF
Math Coprocessor
170-177
Secondary IDE Hard Disk Controller
1F0-1F8
Primary IDE Hard Disk Controller
278-27F
Parallel Printer
2E8-2FF
Serial Port 4 (COM4)
2F8-2FF
Serial Port 2 (COM2)
378-37F
Parallel port (Standard and EPP)
3C0-3DF
VGA
3E8-3EF
Serial Port 3 (COM3)
3F0-3F7
Floppy Disk Controller
3F8-3FF
Serial Port 1 (COM1)
778-77A
Parallel Port (ECP Extensions) (Port 378+400)
CF8-CFF
PCI bus Configuration Address and Data