User Guide

User Guide
DTA: I/O

I/O

Keyboard Connector
PS/2 Mouse Connector
Parallel Port Connector (25-pin)
Serial Port Connector


Speaker

The speaker is a piezo-electric speaker mounted on the system board.


I/O Map

Address          Device                               
                                                      
00000026.gif
0000 - 000F      DMA controller #1                    
                                                      
0020 - 0023      Interrupt controller #1              
                                                      
0024             SHASTA data register                 
                                                      
0025 - 0027      Interrupt controller #1              
                                                      
0028             SHASTA index register                
                                                      
0029 - 003F      Interrupt controller #1              
                                                      
0040 - 0043      System timers                        
                                                      
0044 - 005F      Reserved                             
                                                      
0060 - 006F      Keyboard controller                  
                                                      
0070 - 0071      Real-time clock and NMI enable       
                                                      
0080 - 008F      DMA page registers                   
                                                      
00A0 - 00BF      Interrupt controller #2              
                                                      
00C0 - 00DF      DMA controller #2                    
                                                      
00F0             Coprocessor busy clear               
                                                      
00F1             Coprocessor busy reset               
                                                      
00F2 - 00FF      Available                            
                                                      
278 - 27F        LPT2                                 
                                                      
2E8 - 2EF        COM4                                 
                                                      
2F8 - 2FF        COM2                                 
                                                      
378 - 37F        LPT1                                 
                                                      
3E8 - 3EF        COM3                                 
                                                      
3F8 - 3FF        COM1                                 
                                                      

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