Our website provides a free download of Yacc 0.4.0.3. The latest version of the program can be installed on PCs running Windows XP/Vista/7/8/10, 32-bit. The program is categorized as Multimedia Tools. The common filenames for the program's installer are Yacc.exe or Yacc_0.4.0.1_Installer.exe etc. This free program was originally produced by kapoue3. The following versions: 0.4 and 0.3 are the most frequently downloaded ones by the program users.
From the developer:
Yet Another Cso Compressor (YACC) is as its name indicates a GUI using simple program of Compressed Iso Converter BOOSTER.This program compresses the ISO of a PSP game to a new cso file smaller and it is not uncommon to reduce more than one-half size of the majority of iso.
You may want to check out more software, such as Flex Windows Lex and Yacc, Python PLY or Python - pyparsing, which might be related to Yacc.