Imagedisk 1.17

Chuck Guzis cclist at
Mon Jul 30 15:01:34 CDT 2007

On 30 Jul 2007 at 14:33, Jim Leonard wrote:

> I've never heard of this.  Are you talking about monitoring a bit in
> the 8253? -- Jim Leonard (trixter at 

Bit 4, port 61h.  You can use a simple toggle test to see if it's 
there, but on just about every system I've ever seen, it is.  One of 
the holdovers from the PC-AT architecture.


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