System Introduction
1-9
1.4 Hardware Configuration and Specification
1.4.1 Memory Address Map
Table 1-3
Memory Address Map
Address Range
Definition
Function
000000 - 09FFFF
640 KB memory
Base memory
0A0000 - 0BFFFF
128 KB video RAM
Reserved for graphics display buffer
0C0000 - 0CBFFF
Video BIOS
Video BIOS
0F0000 - 0FFFFF
64 KB system BIOS
System BIOS
100000 - top limited
Extended memory
SIMM memory
FE0000 - FFFFFF
256 KB system ROM
Duplicate of code assignment at 0E0000-0FFFFF
1.4.2 Interrupt Channel Map
Table 1-4
Interrupt Channel Map
Priority
Interrupt Number
Interrupt Source
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
SMI
NMI
IRQ 0
IRQ 1
IRQ 2
IRQ 8
IRQ 9
IRQ 10
IRQ 11
IRQ 12
IRQ 13
IRQ 14
IRQ 15
IRQ 3
IRQ 4
IRQ 5
IRQ 6
IRQ 7
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 / PCMCIA
Audio (option) / PCMCIA / Internal modem / Serial
communication port 2 / PCMCIA / USB
Audio (option) / PCMCIA / Internal modem / Serial
communication port 1 / PCMCIA
PS/2 mouse
INT from coprocessor
Hard disk controller / PCMCIA controller
CD-ROM controller / PCMCIA controller
Serial communication port 2 / Internal modem / Audio / PCMCIA
Serial communication port 1 / Internal modem / Audio / PCMCIA
Parallel port (option) / Internal modem / Audio / PCMCIA
Diskette controller
Parallel port (option) / Audio
Summary of Contents for 390 Series
Page 15: ...System Introduction 1 3 Figure 1 2 PCB No 96183 1A Mainboard Layout Bottom ...
Page 96: ...2 50 Service Guide 2 3 3 Pin Configuration Figure 2 4 FDC37C67 TQFP Pin Diagram ...
Page 97: ...Major Chips Description 2 51 Figure 2 5 FDC37C67 QFP Pin Diagram ...
Page 102: ...2 56 Service Guide 2 3 6 Block Diagram Figure 2 6 FDC37C67 Block Diagram ...
Page 126: ...2 80 Service Guide 2 5 4 1 Functional Block Diagram Figure 2 10 M38813 Block Diagram ...
Page 128: ...2 82 Service Guide 2 6 2 Pin Diagram Figure 2 11 YMF715 Block Diagram ...
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