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pce4 Micro-Computer (1975)

A direct competitor to the BitVision micro-computer series, the pce4 by Pendelum CE AB, released in 1975, had a staggering 256 bits of ROM thanks to its clever usage of Memory Banks, and 44 Bits of Usable RAM.

It's programmable using the pcex4 assembly programming language developed by the company. Documentation included on the "Programming.pce4" page