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The 3195 was both a 360 and a 370 depending upon witch model you had: The machine was designed for scientific use and primarily for floating point operations. The differences that I can find between the 360 and 370 machines was that the 370 had a 250-nanosecond Time Of Date Clock (TOD). additional variable field length instructions, additional control registers and Retain/370 remote support.

360 Model J 1,048,576 Bytes 360 Model 1J 1,048,576 Bytes
360 Model K 2,097,152 Bytes 360 Model 1K 2,097,152 Bytes
360 Model KJ 3,145,728 Bytes 360 Model 1KJ 3,145,728 Bytes
360 Model L 4,194,304 Byes 360 Model 1L 4,194,304 Byes

The Core Memory had a cycle time of 756 Nanoseconds with an 8 Byte parallel data flow. Ther was also a high speed 54 nanosecond cache buffer of 32K. Double words were 8 way interleaved on the model J/J1 and 16 way interleaved on the models K/K1 and L/l. This allowed for overlapped operation of Instruction (I) and Execution (E) units.

Memory was located in Basic Storage Modules (BSM) and each machine had one additional BSM and a BSM analyser. Memory could be taken of line for repair and the spare BSM installed. Two trolley like devices were used to move the BSM's.

These were NOT general purpose machines and and there were operational differences from other 360 and 370 systems. It was possible for the for the 195 to perform processor stores out of sequence.**

Channels were external and consisted of 2880, 2870 and 2860's. The Consul was a 3060 and had more lights and switches than Dr Who's Tardis.  I believe that the 2075 was similar but still not as large.

Also required was one of each  3080-1. 3080-2 and 3080-3 power units. One 3085 power distribution unit. 3086 Coolant distribution unit. and a Motor Generator for 400Htz. This was not a small box.

** If anybody out there has a copy of GA22-6943 Model 195 Functional Characteristics I would appreciate a loan or to purchase.


This page was last edited on 10/02/00