Deep Blue C is a compiler for a subset of the C programming language for the Atari 8-bit family distributed by the Atari Program Exchange (APX). The compiler is a version of Ron Cain's public domain Small-C[1] modified by John Howard Palevich to run on the Atari computer hardware. Palevich also wrote the Atari 8-bit game Dandy for APX.[2] The syntax supported by Deep Blue C is close to that of ANSI C with significant limitations. The compiler creates binary code for Intel 8080 processor which is then executed by an 8080 virtual machine.[3]

The source code to the compiler was sold by APX as Deep Blue Secrets.[1]

Limitations

The following language constructs are not supported:[4]

Other non-standard properties of Deep Blue C:

  • The last part of switch clause must end with: break, continue, or return.
  • The maximum length of a source code line has to be less than 80 characters.
  • The number of arguments for functions cannot exceed 126.
  • $( and $) are used instead of { and }, because the Atari keyboard and standard character set does not include braces.

Sample program

This program prints "Hello World!":[5]

 main()
 $(
   printf("Hello World!");
 $)

References

  1. 1 2 Palevich, John Howard. Deep Blue Secrets Manual. Atari Program Exchange.
  2. ↑ Hague, James. "The Giant List of Classic Game Programmers".
  3. ↑ Atari 8-bit FAQ
  4. ↑ Deep Blue C documentation at Atari Archives
  5. ↑ W. Zientara, "Jezyki programowania Atari cz.2", SOETO, Warsaw, 1989
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