IBM user manual Address Map, O Addresses Reserved for the CMX58886CX cpuModule

I/O Address Map

As with all standard PC/104 boards, the I/O space is addressed by 10 address lines (SA0–SA9). This allows 210 or 1024 distinct I/O addresses. Any add-on modules you install must therefore use I/O addresses in the range of 0–1023 (decimal) or 000–3FF (hex).

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 37 lists I/O addresses reserved for the CMX58886CX cpuModule.

Table 37 I/O Addresses Reserved for the CMX58886CX 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
450-453h	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.Only one of the I/O addresses shown for a serial port is active at any time. You can use Setup to select which one is active or to disable it entirely.

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.

54 CMX58886CX cpuModule BDM-610000050 Rev A