Bryan Pope wrote:
  This sounds almost like doing colours when doing
graphics on the C64! 
 Yep!  However, this:
 
http://www.oldskool.org/pc/8088_Corruption
 ...is much closer like doing graphics on the C64.  I used the CGA ROM
 FONT itself as the codebook for my video routine. 
OMFG - that is sooo cool...   Now let's see if I can get the original
working on my (non-retro) machine..
Cheers!,
Bryan