At one point in my engineering career, I needed to create graphic versions of OrCAD SDT schematics in some sort of 'standard' format.  OrCAD SDT produces output in a number of formats, but not in any of the standard graphics file types (BMP, GIF, JPEG, etc.)  I decided to create a printer driver that outputs pages of schematics as PCX-format files.

Why PCX?  Three reasons:  1) the PC fax package that I was using (in 1991-1992) accepted very few formats, but PCX was one of them; 2) I had the specification for PCX format at my disposal; and 3) at the time I wrote the drivers, PCX was one of the more common graphics formats.  (The briefly popular GEM operating system used PCX, and Windows 2.x and 3.x supported the format in their Paint program -- they might still support it, who knows?)  Based on the example code provided on the OrCAD website, it looked like creating a printer driver for PCX in OrCAD SDT was straightforward.

The need I had for PCX format has long since disappeared, thanks to the improvements in graphics applications, but I still found the drivers to be useful to create OrCAD SDT schematic diagrams to add to specifications, white papers, etc.  Once the schematic has been created as a PCX file, it can be imported into Adobe® PhotoShop, Corel Paint Shop Pro, Microsoft® Word, Lotus® Word Pro, etc. and cropped as necessary, or converted to another format.  These programs can also be used to print on modern printers which do not have OrCAD SDT printer drivers, without the bother of writing a printer driver for the specific printer (see below).  Simply fit the PCX file to the maximum size allowed on the printed page, then print the file the same way that photos and other graphics are printed.

While OrCAD has replaced SDT with other versions, including the latest version, OrCAD Capture™, there are still copies of the earlier SDT programs in use in some places.  (I've been amazed at the resiliency of this long-obsolete tool!)  If you are a user of one of the earlier versions, you might find these drivers useful.

Additional drivers and information used to be available at OrCAD's website.  How much of it is still there is anyone's guess, as OrCAD SDT has been out of production for almost 20 years.  The information was always limited -- there was never a "how-to" guide for writing drivers.  I can only provide the very tiniest bit of support in their operation, as I have not even used these drivers since around 1997!  At this point, I don't even have a PC running SDT to test them on.  Consider them worth at least the price you paid (nothing), and take it from there.