Spectrangle Interactive: Gamma Release
Issue running running under Windows 2000 and XP

Problem: 
Font problem - Some characters, such as numbers, do not display or are corrupted.

Cause:
A bug in EGAVGA.BGI (Borland Graphics Library). The version used by S.EXE is dated 1989. 
This cause of this problem is described at:
http://www.talkaboutprogramming.com/group/comp.lang.pascal.borland/messages/96078.html
“The problem is not XP but bios related and it is actually a bug in the
.BGI file. The EGAVGA.BGI file trusts that the bitmap default
font is at a certain location in memory. If it is not it will produce
garbage of what is accidently there.”

Resolution:
Run the software under DOSBox. 
http://dosbox.sourceforge.net/
http://prdownloads.sourceforge.net/dosbox/DOSBox0.65-win32-installer.exe?download

Download DOSBox and install (v0.65 at the time of writing)
This is a fairly straight forward procedure.

Download and unzip the Spectrangle files into c:\spect\ (for example)

If you are not running any other DOS programs then:
Add the following lines to the end of the DOSBox.conf (a text file in the DOSBox Program files directory)
in the [autoexec] section

mount c c:\spect\
c:
s

Running DOSBox will now automatically invoke Spectrangle.