I/O Address Map

As with all standard PC/104 boards, the I/O total I/O space is 64k in size. However, because early processors only addressed 0 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.

Note If you add any PC/104 modules or other 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 42 lists I/O addresses reserved for the CMX158886 cpuModule.

Table 42 I/O Addresses Reserved for the CMX158886 cpuModule

Address Range (hex)

Bytes

Device

 

 

 

000–00Fh

16

DMA Controller

 

 

 

010–01Fh

16

Reserved for CPU

 

 

 

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

 

 

 

0C0–0DFh

32

DMA Controller 2

 

 

 

0F0–0FFh

16

Math Coprocessor

 

 

 

100–101h

2

Video Initialization

 

 

 

1F0–1FFh

16

Hard Disk1

200–201h

2

Reserved

 

 

 

238–23Bh

4

Bus Mouse2

2E8–2EFh

8

Serial Port3

2F8–2FFh

8

Serial Port3

3E8–3EFh

8

Serial Port3

3F0–3F7h

8

Floppy Disk1

3F8–3FFh

8

Serial Port3

450-454h

4

aDIO4

455h

1

Watchdog Timer5

456-45F

9

EPLD

 

 

 

1.If a floppy or IDE controller is not connected to the system, the I/O addresses listed will not be occupied.

2.If a PS/2 mouse is not connected to the system, the I/O addresses listed will not be occupied.

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

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

5.If watchdog timer is disabled, the I/O addresses listed will not be occupied.

60 CMX158886 cpuModule

BDM-610000049 Rev G

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IBM BDM-610000049 user manual Address Map, O Addresses Reserved for the CMX158886 cpuModule, Address Range hex Bytes Device
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BDM-610000049 specifications

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The IBM BDM-610000049 is also notable for its security features, which help protect sensitive data from unauthorized access and cyber threats. It incorporates state-of-the-art encryption protocols and secure access controls, providing an additional layer of safety for businesses handling critical information.

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