| Pentagon | |
| Aka: | Пентагон |
| Type: | Home computer |
| Media: | tape, floppy disks, hard drives (depending on models) |
| Os: | Sinclair BASIC, TR-DOS |
| Cpu: | КР1858ВМ1/3, Т34ВМ1, Z80A, B, H @ 3.5 MHz (7 MHz turbo mode) |
| Memory: | 48 to 4096KB (depending on model) |
| Storage: | tape, Beta 128 Disk Interface, hard drives (depending on models) |
| Graphics: | 256x192, 384x304, 512x192 monochrome |
| Sound: | Beeper, Covox, UltraSound (depending on model) |
| Compatibility: | ZX Spectrum 128 |
| Related: | ATM (computer) |
The Pentagon (ru: Пентагон) 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 (Pentagon 48), with a diagonal cut in one of the corners.[1]
Many simple devices (upgrades) were invented to connect to the Pentagon with some soldering.[2]
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 (especially for IDE and General Sound cards). This model also featured a "turbo" mode (7 MHz instead of the original's 3.50 MHz).[4]
