IBM System/360 Model 40

The IBM System/360 Model 40 was a mid-range member of the IBM System/360 family. It was announced on April 7, 1964, shipped in 1965, and withdrawn on October 7, 1977. ^{[1] [2]}

Configuration

A typical, early, basic Model 40 system had the following configuration:^[3]

• A Model 40 processor

IBM 2040 Central Processing Unit

128K byte storage, storage protection feature, universal instruction set,

one multiplexor channel, two selector channels, and interval timer

• An operator console

IBM 1052 Typewriter- Keyboard (usually assigned to 009 hexadecimal address)

• A unit record input-output machine

IBM 1442 Card Reader-Punch (00A)

or

IBM 2540 Reader-Punch (00C & 00D)

• A line printer

IBM 1443 Printer (00B)

or

IBM 1403 Printer (00E)

• A disk storage

IBM 2311 Magnetic Disk Drives (190 & 191)

or

IBM 2314 Direct Access Storage Facility

Using IBM 1316 or IBM 2316 Disk Packs

• A tape storage

IBM 2401 Magnetic Tape Units (180 & 181 for 7-track, and 182 & 182 for 9-track)

If used in a telecommunications environment, the Model 40 also had:

• A telecommunication controller

IBM 2701 Communication Controller

IBM 1400 series emulation

With the additional Compatibility Feature hardware and Compatibility Support software under DOS/360, the IBM 1401/1440/1460 object programs could be run in the emulation mode, with little or no reprogramming.^[4]

Other

The IBM operating system used was usually the realistically sized DOS/360, rather than the larger OS/360.

The IBM System/360 Model 40 was developed and manufactured at IBM's facility in Poughkeepsie, U.S.: manufactured in Mainz, Germany; and manufactured in Fujisawa, Japan.

See also

• IBM System/360 Model 20
• IBM System/360 Model 30
• IBM System/360 Model 50
• IBM System/360 Model 67

References