Access PCI-DIO-24D(H) User Manual

  
These cards are I/O-mapped devices that are easily configured from any language and any language can 
easily perform digital I/O through the card's ports. This is especially true if the form of the data is byte or 
word wide. All references to the I/O ports would be in absolute port addressing.  
 

  
If you wish to gain a better understanding of the programs on diskette, then the information in the 
following paragraphs will be of interest to you. Refer to the data sheets and 8255-5 specification in 
Appendix A. 
  
A total of 16 register locations are used by these cards. With all counters (S03), the total becomes 32 
register locations.  
 

 

 

 

Base Address 

PA Group 0 

Read/Write 

Base Address +1 

PB Group 0 

Read/Write 

Base Address +2 

PC Group 0 

Read/Write 

Base Address +3 

Control byte 

Write Only 

Base Address +4 

Unused 

  

Base Address +5 

Unused 

  

Base Address +6 

Unused 

  

Base Address +7 

Unused 

  

Base Address +8 

Unused 

  

Base Address +9 

Unused 

  

Base Address +C 

Enable/Disable Buffer 

Write Only 

Base Address +D 

Disable Interrupts 

Write Only 

Base Address +E 

Enable Interrupts 

Write Only 

Base Address +F 

Clear Interrupt latch 

Write Only 

Base Address +10  Counter/Timer A0 

Read/Write 

Base Address +11  Counter/Timer A1 

Read/Write 

Base Address +12  Counter/Timer A2 

Read/Write 

Base Address +13  Counter/Timer A Control 

Read/Write 

Base Address +14  Counter/Timer B0 

Read/Write 

Base Address +15  Counter/Timer B1 

Read/Write 

Base Address +16  Counter/Timer B2 

Read/Write 

Base Address +17  Counter/Timer B Control 

Read/Write 

Base Address +18  Counter/Timer C0 

Read/Write 

Base Address +19  Counter/Timer C1 

Read/Write 

Base Address +1A  Counter/Timer C2 

Read/Write 

Base Address +1B  Counter/Timer C Control 

Read/Write 

 

 Address Assignment Table

  
 
 

Manual PCI-DIO-24DH 

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