How to combine two pf4bit bitmaps with palettes into a new pf8bit bitmap

Learn how to combine two pf4Bit bitmaps with different palettes into a pf24Bit bitmap,
or into a pf8Bit Bitmap with a combined palette, with the following Lab Report

http://www.infomaster.net/external/efg/Graphics/Colors/CombinePf4bit.htm

This example shows how to access pixel data using Scanline with pf4bit and pf8bit
bitmaps.
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Earl F. Glynn                 E-Mail:  EarlGl...@att.net
Overland Park, KS  USA