Standard Register Set
The standard register set is the same as with standard PC/AT systems. The
table below provides an overview of the address ranges occupied by these
registers.
Table 8: Standard register set
I/O Address Range (Hex)
Function
0000 - 000F
DMA Controller 1
0020 - 0021
Interrupt Controller 1
0040 - 0043
Counter / Timer
0060
Keyboard Controller
0061
NMI Status and Control
0064
Keyboard Controller
0070 - 0071
RTC, NMI Mask
0080 - 008F
DMA Page register
00A0 - 00A1
Interrupt Controller 2
00B2 - 00B3
Power Management
00C0 - 00DE
DMA Controller 2
00F0 - 00F1
Coprocessor
0160 - 016F
Reserved
a
0170 - 0177
Secondary IDE
01F0 - 01F7
Primary IDE
a.
Used for onboard programmable options. They are not intended to be
used from normal users. For more explanation please check the ‘Board
Specific Hardware Programmer’s Manual’
Plug and Play Devices
See “Board Specific Hardware Programmer’s Manual”
Interrupts
The interrupt routing for standard components such as COM1/2 or LPT1 is in
compliance with standard PC/AT systems. Unused interrupts can be used for
add-on cards or other board specific PCI devices such as SCSI and Ethernet.
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