Chapter 3 |
|
| Hardware | ||
Table |
|
|
| ||
|
|
|
| ||
| 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) |
|
| FFF80000h | - | FFFFFFFFh | System Flash |
|
|
|
|
|
|
|
I/O Address Map
Table
Table
Address (hex) | Subsystem |
Primary DMA Controller | |
|
|
Master interrupt Controller | |
Programmable Interrupt Timer (Clock/Timer) | |
|
|
Keyboard Controller | |
|
|
CMOS RAM, NMI Mask Reg, RT Clock | |
DMA Page Registers | |
|
|
092 | Fast A20 gate and CPU reset |
|
|
094 | Motherboard enable |
|
|
102 | Video subsystem register |
Slave Interrupt Controller | |
|
|
Slave DMA Controller #2 | |
|
|
Math Coprocessor | |
Secondary IDE Hard Disk Controller | |
|
|
Primary IDE Hard Disk Controller | |
|
|
Parallel Printer | |
Serial Port 4 (COM4) | |
|
|
Serial Port 2 (COM2) | |
|
|
Parallel port (Standard and EPP) | |
VGA | |
|
|
Serial Port 3 (COM3) | |
|
|
Floppy Disk Controller | |
Serial Port 1 (COM1) | |
|
|
Parallel Port (ECP Extensions) (Port 378+400) | |
|
|
| PCI bus Configuration Address and Data |
|
|
24 | Reference Manual | LittleBoard 550 |