Ampro Corporation Littleboard 550 Address Map, Base Address Function, Address hex Subsystem, Vga

Chapter 3				Hardware
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)
	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

24 Reference Manual LittleBoard 550