Intel® Pentium® Silver and Intel® Celeron® Processors Datasheet, Volume 1


ID 633935
Date 17/06/2021 00:00:00
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Document Table of Contents

Simple Read

The first method is to perform a simple read operation. The counter is selected through Port 40h (Counter 0) or 42h (Counter 2).

Note:Performing a direct read from the counter does not return a determinate value, because the counting process is asynchronous to read operations. However, in the case of Counter 2, the count can be stopped by writing to the GATE bit in Port 61h.