Hardware Configuration And Specification; Memory Address Map; Interrupt Channel Map; Dma Channel Map - Acer Extensa 61X Service Manual

1.4

Hardware Configuration and Specification

1.4.1

Memory Address Map

Table 1-7

Memory Address Map

Address Range
000000 - 09FFFF
0A0000 - 0BFFFF
0C0000 - 0CBFFF
0E0000 - 0EFFFF
0F0000 - 0FFFFF
10000 - 7FFFF
80000 - 27FFF
FE0000 - FFFFFF
1.4.2

Interrupt Channel Map

Table 1-8

Interrupt Channel Map

Priority Interrupt Number
1 SMI
2 NMI
3 IRQ 0
4 IRQ 1
IRQ 2
5 IRQ 8
6 IRQ 9
7 IRQ 10
8 IRQ 11
9 IRQ 12
10 IRQ 13
11 IRQ 14
12 IRQ 15
13 IRQ 3
14 IRQ 4
15 IRQ 5
16 IRQ 6
17 IRQ 7
A PCMCIA card can use IRQ 3, 4, 5, 7, 9 and 11 as long as it does not conflict with the
interrupt address of any other device.
1.4.3

DMA Channel Map

Table 1-9

DMA Channel Map

Controller
1
1-14
Definition
640 KB memory
128 KB video RAM
Video BIOS
128 KB system BIOS
Extended memory
256 KB system ROM
Power management unit
Parity error detected, I/O channel error
Interval timer, counter 0 output
Keyboard
Interrupt from controller 2 (cascade)
Real-time clock
Cascaded to INT 0AH (IRQ 2)
Audio (option) / PCMCIA
Audio (option) / PCMCIA
PS/2 mouse
INT from coprocessor
Hard disk controller
CD-ROM controller
Serial communication port 2
Serial communication port 1
Parallel port (option) / Audio
Diskette controller
Parallel port (option)
Channel
0
Base memory
Reserved for graphics display buffer
Video BIOS
System BIOS
System BIOS
Onboard Memory
SIMM memory
Duplicate of code assignment at 0E0000-0FFFFF
Interrupt Source
Address
0087
Function
Function
Audio (option)/ECP(option)
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