Apple II
File Type Notes
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                                                  Developer Technical Support

File Type:         $C1 (193)
Auxiliary Type:    $0002

Full Name:     Super Hi-Res 3200 color screen image
Short Name:    Super Hi-Res 3200 color image

Written by:    Matt Deatherage                                 September 1990

Files of this type and auxiliary type contain pictures with up to 3,200 colors 
displayed simultaneously.
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Files of type $C1 and auxiliary type $0002 contain Super Hi-Res screen images 
with extra color tables so that up to 3,200 colors can be displayed 
simultaneously.

Such a display technique is visually striking but is not easy--the program must 
watch the Mega II video counters and change the color tables in the palette 
for future scan lines while the Apple IIgs is drawing a different scan line.  
All such pictures use 320 mode.

This format is for uncompressed 3,200-color pictures.  It is often referred to 
as "Brooks format" after the designer of the format, John Brooks.  For a way 
to store these pictures compressed, see the MULTIPAL block in the Apple 
Preferred format.

Definition

The following definition is used in this document in addition to those defined 
for all Apple II file types:

Color table    A table of sixteen two-byte entries, where each entry in the 
               table is a master color value ($0RGB, where R is the red 
               component, G is the green component and B is the blue 
               component).

File Structure

The format for these files is similar to that for Super Hi-Res screen images.

        pixelData  (+000)  32000 Bytes
                                       Pixel data to be displayed on 
                                       the Super Hi-Res screen.
        colorTables (+32000) 200 Color Tables
                                       One color table for each scan line.  
                                       Each color table is stored in reverse 
                                       order; the color value for color 15 
                                       is stored first.


Further Reference
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  o  Apple IIgs Toolbox Reference, Volume 2
  o  Apple IIgs Hardware Reference
  o  File Type Note for file type $C0, auxiliary type $0002, 
     Apple Preferred Format

