Big-Shell Source Code

Big-Shell was a utility designed to work with AutoCAD back in the early 1990's. AutoCAD had recently been upgraded to a 32 bit application. A side effect of this upgrade, was that the DOS Shell memory space was smaller when shelling out of AutoCAD .

During its heyday, this application was a big seller for Spectrum Research. Technology has now long passed this code by. However, it may contain functions that some people find interesting, and might also have value as a learning tool. I therefore commit this source code into the public domain.

  1. You may use this code any way that you want in your own applications, at no charge from Spectrum Research, Inc..
  2. Any application using any part of this source code must also contain an acknowledgement in the application's About Box indicating "Portions copyright Alfred J. Heyman".
  3. The www.spectrum-research.com web site is the sole distribution point for these sources. You may not redistribute them as source code.
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ASM Language Files
Shell.ASM
Video.ASM
MVideo.ASM
10OVL.ASM
IsDOS.ASM
DOS.ASM

C Language Files
BSOvl.C
BShell.C
Spectrum.C