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System Specifications 135
System I/O addresses
The following table shows the location in I/O space of all directly
I/O-accessible registers.
Address Resource
0000h - 000Fh DMA Controller 1
0010h - 001Fh DMA Controller 1
0020h - 0021h Interrupt Controller 1
0022h - 0023h
0024h - 0025h Interrupt Controller 1
0026h - 0027h
0028h - 0029h Interrupt Controller 1
002Ah - 002Bh
002Ch - 002Dh Interrupt Controller 1
002Eh - 002Fh Super I/O Index and Data Ports
0030h - 0031h Interrupt Controller 1
0032h - 0033h
0034h - 0035h Interrupt Controller 1
0036h - 0037h
0038h - 0039h Interrupt Controller 1
003Ah - 003Bh
003Ch - 003Dh Interrupt Controller 1
003Eh - 003Fh
0040h - 0043h Programmable Timers
0044h - 004Fh
0050h - 0053h Programmable Timers
0054h - 005Fh
0060h, 0064h Keyboard Controller
0061h NMI Status and Control Register
0063h NMI Status and Control Register
0065h NMI Status and Control Register
0067h NMI Status and Control Register
8508366.book Page 135 Tuesday, October 23, 2001 11:29 AM