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Confidential
I/O Map
The SR-600 system I/O map is PC/AT-compatible. The I/O address assignments are shown
below. The changes in the serial and parallel ports I/O addresses is available from the BIOS
setup program or Plug & Play function .
Table 5-1 I/O Map
I/O address
Description
00h-1Fh
DMA controller 1 (8237A)
20h-3Fh
Interruption controller 1 (8259A)
40h-5Fh
Timer/ Counter (8254)
60h-6Fh
Keyboard controller (8042)
70h-7Fh
Real time clock, NMI mask
90h-9Fh
DMA page register
A0h-BFh
Interruption controller 2 (8259A)
B2h-B3h
Advanced Power Management Control
C0h-DFh
DMA controller 2 (8237A)
F0h
Co-processor error
170h-177h
Hard disk controller (Secondary)
1F0h-1F7h
Hard disk controller (Primary)
2E8h-2Efh
Serial port 4
2F8h-2FFh
Serial port 2
376h
Hard disk controller (Secondary)
378h-37Fh
Parallel port 1 (+400h can be used when in the ECP mode)
3B0h-3DFh
VGA register
3E8h-3EFh
Serial port 3
3F0h-3F7h
Floppy disk controller (excluding 3F6h)
3F6h
Hard disk controller (Primary)
3F8h-3FFh
Serial port 1
4D0h-4D1h
Interruption edge/ Level control
CF8h-CFFh
PCI configuration register (DWORD)
CF9h
Reset control (Byte)
5000-5000Ch
SMBUS I/O register
5-4 Hardware Specifications
Can be
changed
Device
✕
82371EB
✕
82371EB
✕
82371EB
✕
FDC37B807
✕
82371EB
✕
82371EB
✕
82371EB
✕
82371EB
✕
82371EB
✕
82371EB
✕
82371EB
✕
82371EB
O
FDC37B807
O
FDC37B807
✕
82371EB
O
FDC37B807
✕
69000
O
FDC37B807
✕
FDC37B807
✕
82371EB
O
FDC37B807
✕
82371EB
✕
82443BX
✕
82371EB
✕
82371EB
Rev.A
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