IBM System/370

System/370 ( S/370 ) was a mainframe architecture of IBM.

The System/370 was an evolutionary development of the System/360 and was announced in the summer of 1970 by IBM. The System/370 was the predecessor of the System/390 and today is one of the most commonly used computers, the System z architecture.

The most important innovation was the Dynamic Address Translation. The operating system could be used in addition to the OS/360 S/360 of the first operating systems with virtualization OS/VS1 VM/370 OS/VS2 SVS, MVS OS/VS2 and DOS / VS.

As storage media arrived magnetic tapes and disks used, with the most common first type 3330 with about 100 MB, then the Type 3350 with just over 300 MB, and finally the Type 3380 with about 600 MB ( models A, B, D, E and J) to 1.8 GB ( model K) were. From 1974, also the mass storage subsystem IBM 3850 support.

Models

  • Model 155 (1970) (IBM 3155 Processing Unit ) 256-2048 Kbytes RAM
  • Model 165 (1970) (IBM 3165 Processing Unit ) 512-3072 Kbytes RAM
  • Model 145 (1970) (IBM 3145 Processing Unit ) 160-2048 Kbytes RAM
  • Model 135 (1971) (IBM 3135 Processing Unit ) 96-512 Kbytes RAM
  • Model 195 (1970) (IBM 3195 Processing Unit ) 1024-4096 Kbytes RAM
  • Model 158 (1972) (IBM 3158 Processing Unit ) 512-6144 Kbytes RAM
  • Model 168 (1972) (IBM 3168 Processing Unit ) 1024-8192 Kbytes RAM
  • Model 125 (1972) (IBM 3125 Processing Unit ) 96-256 Kbytes RAM
  • Model 115 (1973) (IBM 3115 Processing Unit ) 64-192 Kbytes RAM
  • Model 115-2 (1975 ) 64-384 Kbytes RAM
  • Model 125-2 (1975 ) 96-512 Kbytes RAM
  • Model 158-3 ( 1976) ( IBM 3158-3 processing unit) 512-6144 Kbytes RAM
  • Model 168-3 ( 1976) ( IBM 3168-3 processing unit) 1024-8192 Kbytes RAM
  • Model 135-3 ( 1976) ( IBM 3135-3 processing unit) 256-512 Kbytes RAM
  • Model 145-3 ( 1976) ( IBM 3145-3 processing unit) 192-1984 Kbytes RAM
  • Model 138 (1976) (IBM 3138 Processing Unit ) 512-1024 Kbytes RAM
  • Model 148 (1976) (IBM 3148 Processing Unit ) 1024-2048 Kbytes RAM
  • Model 158- AP ( 1976) ( Attached processor) 512-6144 Kbytes RAM

Clones

In the Eastern Bloc mainframes were developed under the name ESER in three rows of computer systems. ESER the Series II were largely compatible with the IBM System/370. Until the 1990s, the investments EC 1055, EC were 1055m, EC 1056 and EC 1057 with central units from the VEB Kombinat Robotron in East Germany still in use.

Memory Management Unit IBM System/360 z/VM
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