Topic summary
ISIS-II
Extracted from the Wikipedia article ISIS (operating system).
Overview
ISIS-II needed at least 32 kilobytes of RAM, the 8080/8085 CPU maximum address space was 64 kilobytes. In the MDS-800 and Series-II, the Monitor occupied F800h to FFFFh. Floppy disk format was 8-inch single-sided, 250 KB single-sided, single-density FM, or 500 KB single-sided, double-density MMFM. ISIS-PDS was also software and media incompatible and unique, it came on 720 KB double-sided double-density (DSDD) 5¼-inch floppies with the Intel personal development system (iPDS-100).