nemesis wrote:
> David Buck <dav### [at] simberoncom> wrote:
>> This effectively became the showcase picture of DKBTrace in the very
>> early days.
> 
> I can imagine.  Back then, there were no 3D accelerator cards, no Playstation.
> Just simple 2D bitmaps on screen...
> 
> 

On the Amiga, the highest graphics format I could display this in 
properly was 320x400.  The mode was called HAM (Hold and modify) and I 
had to write a special program to produce it.  The format used 6 bits 
per pixel.  Of the 6 bits, 2 bits told you what to do with the other 4.

00 - interpret the other 4 bits as the index of one of 16 color 
registers of 12 bits each
01 - take repeat the previous color replacing the red value with the 
lower 4 bits
10 - take repeat the previous color replacing the green value with the 
lower 4 bits
11 - take repeat the previous color replacing the blue value with the 
lower 4 bits

Late in the history of DKBTrace, I agreed to let an Amiga hardware 
peripheral company use the images for advertising in return for one of 
their higher-end graphics cards that got closer to 24 bits of color but 
still used the hold and modify technique.

David Buck

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