TIP: Click on subject to list as thread! ANSI
echo: os2prog
to: Andrew Grillet
from: Leon Deboer
date: 1995-08-19 21:31:00
subject: PORT VIRTUALIZATION

AG> You have to set up the hardware to interrupt if an attempt is made to
 AG> access the port, go and look at the instruction that did it, and pass
 AG> it to the other machine. If its an IN, you also have to get the data,
 AG> then restart the trapped program. It sounds easy, but it is fiendishly
 AG> hard to debug.

Finally someone who fully understands what I was trying to do 

 AG> 
 AG> The timing is completely screwed. Anthing timing sensetive wont work.
 AG> (This means dongles normally, but also parallel to scsi converters,
 AG> and parallel port network cards. Some printers have bi-directional
 AG> comms using the control lines for data, and these may not work
 AG> either.)

Your right...dam..I hate that...the timing will be shot and there goes
another great idea down the gurgler!!!!

Ohhh well back to see if I can write a program to access the network
printer...I wish I knew where to start with this....(walks off and slashes
wrist)......

thanks anyhow

ldeboer{at}ibm.net
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