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Operating System/Virtual Storage 1, or OS/VS1, is a discontinued IBM mainframe computer operating system designed to be run on IBM System/370 hardware. It was the successor to the Multiprogramming with a Fixed number of Tasks (MFT) option of System/360 's operating system OS/360 .
Start of the Stage 1 input assembler code for a Sysgen for a System 370/148 running OS/VS1, c. 1979 Stage 1 is the compilation of a sequence of assembler macro instructions describing the configuration to be installed or updated.
IBM released fairly minor enhancements of OS/VS1 until 1983, and in 1984 announced that there would be no more. OS/VS1 and TSS/370 are the only IBM [51] System/370 operating systems that do not have modern descendants. The Special Real Time Operating System (SRTOS), Programming RPQ Z06751, is a variant of OS/VS1 extended to support real-time ...
OS/VS2 Release 3.8 was the last free release of MVS. In the late seventies and early eighties IBM announced: 5740-XE1 MVS/System Extensions (MVS/SE) MVS/SE improves the performance and RAS of OS/VS2 (MVS) 5740-AM6 Data Facility Device Support (DFDS) for OS/VS1 5740-AM7 Data Facility Device Support (DFDS) for MVS
OS/VS2 release 1 is an upgrade of OS/360 MVT that retained most of the original code and, like MVT, is mainly written in assembly language. The MVS core is almost entirely written in Assembler XF , although a few modules were written in PL/S , but not the performance-sensitive ones, in particular not the Input/Output Supervisor (IOS).
The search for missing hiker Susan Lane-Fournier, 61, took a tragic turn after her body was found over the weekend in Welches, Oregon, an unincorporated community at the base of Mount Hood.
As previously stated, Coke Zero is lower in caffeine than Diet Coke. Despite this difference, all three dietitians say that, once again, it does not make one healthier than the other.
VSAM was introduced in the 1970s when IBM announced virtual storage operating systems (DOS/VS, OS/VS1 and OS/VS2) for its new System/370 series, as successors of the DOS/360 and OS/360 operating systems running on its System/360 computer series. While backwards compatibility was maintained, the older access methods suffered from performance ...