Windows 3.1 Device Drivers (ddag31qh.hlp) (Table of Contents; Topic list)
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Communication Escapes
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The communications driver supports the RESETDEV, GETBASEIRQ, GETMAXLPT, and
GETMAXCOM communication escapes in its cextfcn function. These communication
escapes reset the printer (assert the reset line) and retrieve parallel- and
serial-port identifiers.
 
 
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