(DIN connectors). The video signal is output via SRGB, rather than an RF modulator. Memory access is clear (there is no conflict with the CPU and display controller) and display timing is the same as in the original ZX Spectrum. Pentagon 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. Peters MC64 and MD-256S3 The Peters MC64 was a Russian ZX Spectrum clone from around 1993, made by Peters Plus, Ltd., who went on to make the Sprinter. Its dimensions are 14 × 7.2 × 2 inches. The Peters MD-256S3 is an enhanced version of the MC64. Profi The Profi or ZX-Profi is a Soviet ZX Spectrum clone developed in 1991 in Moscow by Kondor and Kramis. It features a 7 MHz Zilog Z80 CPU, up to 1024 KB RAM, 64 KB ROM, AY8910 sound chip, Beta 128 disk interface, IDE interface, and 512×240 multi-colour (i.e. two possible colours per 8×1 block) graphics mode for CP/M. Users liked to plug in two 8-bit DACs to play 4-channel modules of Scream Tracker. It also has both parallel and serial ports, and the possibility of attaching an IBM keyboard. Later models had a hard disk interface, and turbo mode. Robik The Robik (ru: Арифметико Логическое Устройство «РОБИК») was a soviet ZX Spectrum clone produced between 1989 and 1994 by NPO Selto-Rotor in Cherkasy. Santaka 002 A ZX Spectrum+ clone produced in 1990 in Kaunas (as mentioned on the computer startup screen), then on the Lithuanian SSR. Its keyboard features Cyrillic characters rather than Latin ones. Scorpion ZS-256 The Scorpion ZS-256 (ru: Скорпион ЗС-256) was a very widespread ZX Spectrum clone produced in St. Petersburg by Sergey Zonov. It was fitted with a Zilog Z80 processor, whilst memory options ranged from 256 to 1024 KB. Various expansions were produced, including SMUC – an adapter for IDE and ISA slots, which allowed the use of IBM PC compatible hard drives and expansion cards. The Shadow Service Monitor (debugger) in the BASIC ROM was activated by pressing the Magic Button (NMI). There was also