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C/C++ Source or Header  |  1988-08-11  |  319 b   |  14 lines
  1. /*
  2.  *    timer.h -- header for timer control routines
  3.  */
  4.  
  5. /* timer clock and interrupt rates */
  6. #define TIMER_CLK    1193180L
  7. #define TIMER_MAX    65536L
  8. #define TICKRATE    TIMER_CLK / TIMER_MAX
  9.  
  10. /* timer port access fro frequency setting */
  11. #define TIMER_CTRL    0x43
  12. #define TIMER_COUNT    0x42
  13. #define TIMER_PREP    0xB6
  14.