My first machine to program at IBM (in 1978): 3790, 256 page size, and only one page of your program in storage: beware loops crossing page boundaries. The program had the luxary address space of 3 (three!) 256 byte buffers. Only 1 K storage required for each active program. The good thing: 3790 programs could be tested on VM.
-- Kris Buelens, IBM Belgium, VM customer support
