Hi Gary!  Glad to see you back online.


On Nov 01 14:04 94, Gary Chambers of 1:326/426 wrote:

 GC> I've always wanted to build a digital thermometer to 
 GC> interface with my computer.

    I'm interested in things like myself.  (Home automation, etc.)


 GC> When I was using DOS, I thought 
 GC> it would be a fairly straightforward task of direct 
 GC> hardware manipulation to gather the information from the 
 GC> device.

    Interfaced how?  On an ISA board?


 GC> With OS/2, I'm not so sure.  Because of the 
 GC> greater protection OS/2 affords the entire system, will I 
 GC> be required to write a device driver to access the CPU ring
 GC>  that allows direct port manipulation?

    Unless you're planning on a thermometer for inside the computer case,
why not have it come in on a serial line?  Isolate all the hardware
interfaceing to a microcontroller;  there are quite a few microcontrollers
that have the A->D conversion & Serial ports (including those
useable for multi-drop) built in.


 GC> Additionally, can 
 GC> someone provide some information, perhaps direct 
 GC> experience, on the matter? Any help would be appreciated.  

    I've no direct experience with this as yet, but have read about it as
much as I could.
Jame

--- Msgedsq/2 2.2e