3.6 8254 Timer Registers (BASE + 0)
The 8254 timer/counter IC occupies 4 I/O address. Users can refer to Tundra's or Intel's data sheet for a full description of the 8254 features. Download the
8254 data sheet from the following web site:
http://support.intel.com/support/controllers/peripheral/231164.htm or
http://www.tundra.com (for Tundra’s 82C54 datasheet).
Address | Read | Write |
|
|
|
Base + 0 | Counter 0 | Counter 0 |
Base + 4 | Counter 1 | Counter 1 |
Base + 8 | Counter 2 | Counter 2 |
Base + C | CLK Control CW0 |
Register Format • 27
