The original SARGON was written by Dan and Kathleen ‘Kathe’ Spracklen in a Z80-based computer called Wavemate Jupiter III using assembly language through TDL Macro Assembler.
The name was originally written entirely in capitals because early computer operating systems such as CP/M did not support lowercase file names.
SARGON was introduced at the 1978 West Coast Computer Faire where it won the first computer chess tournament held strictly for microcomputers, with a score of 5-0. This success encouraged the authors to seek financial income by selling the program directly to customers. Since magnetic media were not widely available at the time, the authors placed an advert in Byte magazine selling for $15 photocopied listings that would work in any Z80-based microcomputer. Availability of the source code allowed porting to other machines.
When magnetic media publishing became widely available, a US Navy petty officer, Paul Lohnes, ported Sargon to the TRS-80, altering the graphics, input, and housekeeping routines but leaving the Spracklen’s chess-playing algorithm intact. Paul consulted with the Spracklens, who were both living in San Diego at the time, to make the TRS-80 version an instant success with the help of Hayden Book’s newly established software division: Hayden Software. Paul was not involved in further refinements to the TRS-80 version due to his reassignment to sea duty shortly after signing the deal with Hayden Software.
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