PETSCII (PET Standard Code of Information Interchange) was used by Commodore 8-bit computers (C64, VIC-20, C128, PET).
It includes upper/lowercase letters, graphics characters, and control codes. Codes 0x20-0x7E overlap with ASCII but with a different case layout.
ATASCII (Atari Standard Code for Information Interchange) was used by Atari 8-bit computers (400/800/XL/XE).
It shares the printable ASCII range (0x20-0x7E) but adds graphics characters and special symbols in the upper range.
Apple II Character Set used a modified ASCII set. Normal ASCII occupied 0x20-0x7E.
Inverse and flashing characters were mapped in the 0x00-0x3F and 0x40-0x7F ranges of screen memory.
ASCII (American Standard Code for Information Interchange) is the foundation for most character encodings.
Codes 0x20-0x7E are the printable range. Control characters (0x00-0x1F) are shown with their common abbreviations.
