Appendix A: Technical Specifications
Memory Map
Address Range Decimal
Address Range
Hexadecimal
Size
Description
960K-1M
0F0000-0FFFFF
64 KB
Upper BIOS
896K-960K
0E0000-0EFFFF
64 KB
Lower BIOS
768K-896K
0C0000-0DFFFF
128 KB
Expansion Card BIOS and
Buffer
640K-768K
0A0000-0BFFFF
128 KB
Standard PCI/ISA Video
Memory
633K-640K 09E400-09FFFF
7KB
BIOS
Reserved
512K-633K
080000-09E3FF
121 KB
Ext. Conventional
memory
0K- 512K
000000-07FFFF
512 KB
Conventional memory
DMA Channels
DMA #
Data Width
System Resource
0
8- or 16-bits
1
8- or 16-bits
Parallel port (for ECP) (if selected)
2
8- or 16-bits
Floppy Drive
3
8- or 16-bits
Parallel port (for ECP) (if selected)
4
Reserved-
cascade channel
5
16-bits
Open
6
16-bits
Open
7
16-bits
Open
I/O Map
Address (hex)
Description
0000-000F
DMA 1
0020-0021
Interrupt Controller 1
0040
Timer/Counter 0
0041
Timer/Counter 1
0042
Timer/Counter 2
0043
Timer Control Word
0060
Keyboard Controller Byte _ Reset IRQ
0061
NMI Status and Control
0070, bit 7
NMI enable
0070, bits 6:0
RTC Index
0071
RTC Data
0072
RTC Extended Index
0073
RTC Extended Data
0080-008F
DMA page registers / POST code display also located at 0080h
0092
Port 92
00A0-00A1
Interrupt Controller 2
00B2-00B3
APM control
35
Содержание Gator Mini-ITX
Страница 1: ... Gator Mini ITX Motherboard Installation Guide ...
Страница 2: ......
Страница 16: ...Gator Mini ITX Installation Guide Figure 1 3 Location of Components and Connectors 8 ...
Страница 21: ...Chapter 2 BIOS Configuration 13 ...
Страница 52: ...Gator Mini ITX Installation Guide User s Notes 44 ...
Страница 58: ...Gator Mini ITX Installation Guide User s Notes 50 ...
Страница 64: ...Gator Mini ITX Installation Guide Watchdog Timer The Watchdog Timer WDT is optional 56 ...
Страница 69: ...Appendix D On Board Video User s Notes 61 ...
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Страница 71: ...MN GMEIX 01 ...