Detailed descriptions 
  16.3 System resources 
SIMATIC Box PC 627 
Operating Instructions, Release 05/2006, A5E00362052-03 
16-21 
16.3  16.3 System resources 
16.3.1  Currently allocated system resources 
 
All system resources (hardware address, memory configuration, IRQ, DMA channel) are 
assigned dynamically by the Windows OS, depending on the hardware configuration, drivers 
and connected peripheral devices. You can view the current configuration of system 
resources or possible conflicts with the following operating systems:  
 
Windows 2000/XP  Start > Run : in the Run dialog, enter 
msinfo32
 and confirm with OK.  
16.3.2  System resources used by the BIOS/DOS 
 
The following table describes the system resources for the factory state of the device. 
16.3.2.1  I/O address allocation 
 
 
I/O address 
(hex) 
Description of the basic function  Possible alternative 
function 
from  to     
0000  0CF7  DMA controller   
0020  0021  Programmable interrupt controller   
0024  0025  Programmable interrupt controller   
0028  0029  Programmable interrupt controller   
002C  002D  Programmable interrupt controller   
002E  002F  Basic unit resources   
0030  0031  Programmable interrupt controller   
0034  0035  Programmable interrupt controller   
0038  0039  Programmable interrupt controller   
003C  003D  Programmable interrupt controller   
0040  0043  System timer   
004E  004F  Basic unit resources   
0050  0053  System timer   
0060  0060  Keyboard controller   
0061  0061  Basic unit resources   
0063  0063  Basic unit resources   
0064  0064  Keyboard controller   
0065  0065  Basic unit resources   
0067  0067  Basic unit resources   
0070  0070  Basic unit resources   
0070  0070  System CMOS/real-time clock   
0080  0080  Basic unit resources   
0081  0091  DMA controller