How about homegrown OS? When I started working on contract to NASA at the Goddard Institute for Space Studies in NYC, June 1976, they ran Scientific Supervisory System/360 (SSS/360) on an IBM 360/95 and a copy under VM/370 R3 on an Amdahl 470/V6. SSS/360 was about 35,000 lines of Assembler code. Its purpose was to load a FORTRAN program into memory and then get out of its way. Running numerical weather prediction models, we were able to run for hours on end with almost no discernible Supervisor Time.
/Tom Kern ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
