MsgTest consists of a Macintosh application called MacMsgTest and a PC application called PCMsgTst. These two applications demonstrate simple communication between that Mac-side and PC-side of PC Compatibility system. These two tools accompany the Cross-Platform Communication Using the PC Compatibility Messaging System Technote. The tools are intended to demonstrate basic functionality of the messaging system described within that Technote.
To run the test, you must have a PC Compatibility system with the PC Compatibility Software v1.5 or later running that system. To execute the tools, perform the following steps:
1) Copy the PCMsgTst folder (and contents) to PC Drive file.
2) Boot the PC.
3) From DOS, execute the PCMsgTst.exe application.
4) Switch back to the Mac and double-click on the MacMsgTest application.
At this point both applications should run quickly. If the Mac should hang up while it's waiting for an acknowledge or a completion routine, hitting the 'esc' key should abort the test.
The tools transfer 256 bytes of data back and forth and are much more useful as sample code to demonstrate how the messaging system works rather than what they actually do.
IMPORTANT: The PCMsgTst Tool must be executed first! Executing the MacMsgTest will appear to hang your machine. You can get out of this by hitting 'esc', but it will abort the test.
Note: It is possible to run the PCMsgTst from DOS window in Win '95 and Win 3.x. Because much of the tool is interacting with the messaging system at interrupt time (something that virtual machines inside of Win 3.x and Win '95 occasionally don't like), if an exception occurs you may want to just run the tool from DOS. I've run the tool from a virtualized DOS box on Win '95 just fine, however.
