Version 2.01a of the SIO2K serial drivers is now avaliable at
http://www.gwinn.com.
This release includes additions that allow support
for a wider range of PCI cards. See HISTORY.TXT in the distribution zip for a complete list of additions and changed.
The drivers are also available at hobbes (http://hobbes.nmsu.edu) and Pete Norloff's os2bbs (http://www.os2bbs.com).
PMLM was added in the 2.01 release of SIO2K. PMLM allows developers and users to monitor all data being sent and received by a given communications port, ie COM1, COM2 etc. The changes in signals, such as DTR and DCD, are also recorded in the PMLM trace.
SIO2K is shareware communication drivers and utilities for OS/2 developed by Ray Gwinn.
Source: OS2VOICE