Pentagon (computer)


The Pentagon home computer was a clone of the British-made Sinclair ZX Spectrum 128.
It was manufactured by amateurs in the former Soviet Union, following freely distributable documentation. Its PCB was copied all over the ex-USSR in 1991-1996, which made it a widespread ZX Spectrum clone.
The name "Pentagon" derives from the shape of the original PCB, with a diagonal cut in one of the corners.
Many simple devices were invented to connect to the Pentagon with some soldering.

Versions

  • Pentagon 48K
  • Pentagon 128K
  • Pentagon 128K 2+
  • Pentagon 128K 3+
  • Pentagon 1024SL v1.x
  • Pentagon-1024SL v2.x
  • Pentagon ver.2.666
The Pentagon 1024SL v2.3 included most of the upgrades of the standard Spectrum architecture, including 1024 KB RAM, Beta 128 Disk Interface and ZX-BUS slots. This model also featured a "turbo" mode.

Upgrades from the original ZX Spectrum