Caple CM109 User Manual download pdf (Page 62)

54 CMX34GS cpuModule BDM-610000082 Rev A

I/O Address Map

As with all standard PC/104 boards, the total I/O space is 64k in size. However, because early processors only

addressed 10 address lines (SA0–SA9), the first 1k is used for legacy I/O devices. Any ISA add-on modules you

install must therefore use I/O addresses in the range of 0–1023 (decimal) or 000–3FF (hex). The upper I/O

addresses are used for PCI I/O devices, and are automatically assigned by the BIOS or operating system at boot

time.

Table 32 lists I/O addresses reserved for the CMX34GS cpuModule.

Note If you add any peripherals to the system you must ensure they do not use reserved addresses listed

below, or malfunctions will occur. The exception to this is if the resource has been released by the user.

Table 32 I/O Addresses Reserved for the CMX34GS cpuModule

Address Range (hex) Bytes Device

000–00Fh 16 DMA Controller

020–021h 2 Interrupt Controller 1

022–02Fh 13 Reserved

040–043h 4 Timer

060–064h 5 Keyboard Interface

070–071h 2 Real Time Clock Port

080–08Fh 16 DMA Page Register

0A0–0A1h 2 Interrupt Controller 2

0C0–0CFh 16 DMA Controller 2

0F0–0FFh 16 Math Coprocessor

170–17Fh 16 Hard Disk - Secondary Command

1. The I/O addresses listed will only be occupied when the SATA controller is configured for Legacy Mode.

When configured for Native Mode (BIOS default), they will be available.

1F0–1FFh 16 Hard Disk - Primary Command

200–201h 2 Reserved

2E8–2EFh 8 Serial Port

2. The I/O addresses for the serial port are selected in the BIOS Setup utility.

2F8–2FFh 8 Serial Port

376-377h 2 Hard Disk - Secondary Control

3E8–3EFh 8 Serial Port

3F6-3F7h 2 Hard Disk - Primary Control

3F8–3FFh 8 Serial Port

C00-C6Fh 112 A55E Chipset

CD0-CDFh 16 A55E Chipset

E80-EBFh 64 Reserved

EC0-EC4h 5 aDIO

3. If aDIO is disabled, the I/O addresses listed will not be occupied.

EC5-EFFh 59 Reserved

1 2 ... 57 58 59 60 61 62 63 64 65 66 67 ... 101 102

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Caple CM109 User Manual Page 62