Re: Thoughts on IBM 360

The Natural Philosopher wrote:

"The 1967 IBM System/360 Model 91 could execute up to 16.6 million instructions per second. The larger 360 models could have up to 8 MB of main memory though that much memory was unusual; a large installation might have as little as 256 KB of main storage, but 512 KB, 768 KB or 1024 KB was more common. Up to 8 megabytes of slower (8 microsecond) Large Capacity Storage (LCS) was also available for some models. "
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I have some Fortran code written on an IBM 360. Due to the 8 MB memory limit, it more or less used one big array, and did it's own memory management by recycling the indexes IX,IY,IZ et cetera. Bloody nightmare to debug.