C:Check/D:Check/ST-Check

File Format
Name	C:Check/D:Check/ST-Check
Ontology	Electronic File Formats Error detection and correction C:Check/D:Check/ST-Check
Released	1982

D:CHECK (for disk) and C:CHECK (for cassette tape) by Istvan Mohos and Tom Hudson are type-in checker programs for the Atari used by ANALOG Computing magazine. They were succeeded by Unicheck

ST-Check by Clayton Walnum is direct translation of D:Check II for the 520ST.

Each character in a line is summed up and undergoes module division leaving a three-digit number that is the checksum. It also includes a group checksum every 15 lines.

A new algorithm was introduced in D:Check II (Issue 10) to better handle missing lines or lines with the wrong number of characters.

The codes may be compatible with Antic's TYPO (Type Your Program Once)

Sample Output

Links

• Typing Guide for special characters
• D:Check (ANALOG Computing Nov 1982 pg 17)
• D:Check II (ANALOG Computing Mar 1983 pg 26)
• C:Check (ANALOG Computing May 1983 pg 16)
• D:CHECK in Action! (ANALOG Computing Jul 1986 pg 23)
  • .atr/.act format (backup)
• D:CHECK in Action! (alt copy) (ANALOG Computing Dec 1988 pg 43)
  • .atr/.act format (backup)
• ST-Check (ANALOG Computing/ST Log 41 Apr 1986 pg 53ST)