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Assembly Source File  |  1990-02-15  |  248 b   |  14 lines
  1. ;
  2. ; *** Listing 4-7 ***
  3. ;
  4. ; Measures the performance of repeated MOV AL,0 instructions,
  5. ; which take 4 cycles each according to Intel's official
  6. ; specifications.
  7. ;
  8.     sub    ax,ax
  9.     call    ZTimerOn
  10.     rept    1000
  11.     mov    al,0
  12.     endm
  13.     call    ZTimerOff
  14.