Last updated on February 22nd, 2025 at 03:46 pm
Pentagon Spectrum, the Sinclair ZX Spectrum clone made in the USSR by amateurs, is a rarity in the world of computer hardware.
#######Design
The Pentagon Spectrum was a clone of the Sinclair ZX Spectrum 128, and its PCB was copied all over the ex-USSR in 1991-1996, making it a widespread ZX Spectrum clone.
The name “Pentagon” derives from the shape of the original PCB (Pentagon 48), with a diagonal cut in one of the corners.
The computer’s design is similar to that of the ZX Spectrum, with a rubber keyboard and a compact size.
########Features
The Pentagon Spectrum is a home computer that runs on Sinclair BASIC and TR-DOS operating systems.
It has a CPU of КР1858ВМ1/3, Т34ВМ1, Z80A, B, H @ 3.5 MHz (7 MHz turbo mode) and a memory of 48 to 4096KB (depending on the model).
The computer’s graphics are 256×192, 384×304, 512×192 monochrome, and its sound is Beeper, Covox, UltraSound (depending on the model).
The computer is backward compatible with the ZX Spectrum 128.
##Curiosities
– The Pentagon Spectrum was a clone of the Sinclair ZX Spectrum 128, which was developed by Sinclair Research
– The computer was manufactured by amateurs in the former Soviet Union, following freely distributable documentation
– The computer’s PCB was copied all over the ex-USSR in 1991-1996, which made it a widespread ZX Spectrum clone
– The computer’s name “Pentagon” derives from the shape of the original PCB (Pentagon 48), with a diagonal cut in one of the corners
The Pentagon Spectrum is a rarity in the world of computer hardware, being a clone of the Sinclair ZX Spectrum 128 made in the USSR by amateurs. Its design is similar to that of the ZX Spectrum, with a rubber keyboard and a compact size. The computer’s features include a CPU of КР1858ВМ1/3, Т34ВМ1, Z80A, B, H @ 3.5 MHz (7 MHz turbo mode) and a memory of 48 to 4096KB (depending on the model). The computer’s graphics are 256×192, 384×304, 512×192 monochrome, and its sound is Beeper, Covox, UltraSound (depending on the model).
#########External Links
The Pentagon by Sinclair Nostalgia
The Pentagon Official Website
World of Spectrum : ZX Spectrum Worlwide Clones
And also a Commodore Amiga Emulator
