[email protected] (Shmuel Metz , Seymour J.) writes: > Every generation believes that it invented sex. The 4300 may mark > MVCIN becoming standard, but the instruction is much older than the > 4300. The Technion had it on their 370/165 in 1972, and I believe that > it was available on the 360/50.
there were lots of special instructions done for 360/50 ... the ibm boston programming center was doing conversational programming system which would include support for new instructions implemented on 360/50. some amount of the work was subcontracted to allen-babcock http://www.bitsavers.org/pdf/allen-babcock/cps/CPS_Progress_Report_may66.pdf lists (new microcode for 360/50): EVAL Evaluate an arithmetic expression CHB one byte item list search operation CHBE CHH two byte item list search operation CHHE LDM load multiple floating point STDM store multiple floating point LUM load under mask STUM store under mask TAC Table ANDed Characters (extensions of translate&test) TOC Table Ored Characters BS Binary Search ADD Floating decimal instructions SUB COMP MULT DIV ... IBM Boston Programming Center was on 3rd flr of 545 tech sq. When the cp67 group split off from the science center (on the 4th flr) and also started the morph from cp67 to vm370 ... they moved to the 3rd flr and took over the Boston Programming Center (including the CPS people) ... while they were now working on vm370/cms ... they did do a port of CPS to CMS (aka CPS could run on plain 360 w/o the new instructions). The original virtual machine implementation had also been targeted for 360/50 ... (before 360/67 was available standard with virtual memory) ... but since nearly all spare 360/50s were going to the FAA Air Traffic Control effort (which had a whole different set of modifications), the science center had to settle for 360/40 ... where they did the hardware changes to provide virtual memory support ... and implemented virtual machine cp/40 (and lots of early cms development was done in parallel on the "bare" 360/40). Later when 360/67 was available, cp/40 morphed into cp/67. as the vm370 group on the 3rd flr expanded ... they outgrew the space and moved out to the old SBC building in burlington mall (SBC having been transferred to CSC as part of settling some litigation). also as part of morph of cp67/cms to vm370/cms ... the ability for cms to execute on a real machine was crippled. -- virtualization experience starting Jan1968, online at home since Mar1970 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
