This is the CAPS8 operating system for casette TU60 tape drive. The caps.zip file is the source files. caps8_assembled.zip is a zip of the CAPS8 subdirectory which has the source files assembled with the binaries needed to build a system. caps8_all.zip is all the files. CAPS8/Binaries for Util has the binaries modifed with an extra field load code at the beginning since util was loosing the first field load when loading the files. (EDITC has not been updated in this directory) For instructions on building and using see http://www.bitsavers.org/pdf/dec/pdp8/pdp8e/DEC-8E-OCASA-B-D_CAPS8_UG.pdf The file caps8.tu60 is a bootable image for SIMH The file caps8.tu6 is a bootable image for WinEight The file caps.zip is the original source. Two lines are jointed together at line 755 in EDITC.PA so it doesn't work correctly. It has been fixed in the rest of the versions in these directories.