System/360 Model 30

IBM System/360 Model 30

IBM System/360 Model 30
Announced April 7, 1964 and
withdrawn June 22, 1970.

Smallest of the System/360 configurations, the Model 30 could serve as a stand-alone system, a communications system or the satellite processor of a larger system.

Typical arithmetic operations per second

  Decimal add (5 + 5 digits) 13,300
  Fixed point add (1 word + 1 word) (32 bits) 34,500
  Fixed point multiply (1 word x 1 word) 3,300
  Fixed point divide (2 words div. by 1 word) 1,800
  Floating point multiply (1 word x 1 word) 3,200

Feeds & speeds

Speed Data width (bits)
Machine cycle time 1 microsec.  
Logic circuits 30 nanosec. 8
Memory cycle time
    8K, 16K, 32K, 64K
2 microsec. 8
Registers
    16 general purpose
    4 floating point

8 microsec.
16 microsecond

32
64
Control
    Read only storage
    Special 1401 compatible feature

1 microsec.
 
Data rate
per channel
(Char. a Sec.)
Control units
per channel
I/O units
per channel
Channels:
    Selector
    (up to 2)
250,000 8 256
Multiplexor
Multiplex mode
Burst mode
16,000
200,000
8 96