It offers enhanced characteristics, compared to the original Spectrum, such as a Z80 at 7 MHz, 1024 kB RAM, 128 kB ROM, AY-8910 (two chips in upgraded models), 8-bit DAC, 8-bit 8-channel ADC, RS-232, parallel port, Beta Disk Interface, IDE interface, AT/XT keyboard, text mode (80x25, 16 colours, 8x8 pattern), and three new graphics modes.

[3] ATM was developed in 1991 based on the Pentagon, a ZX Spectrum clone popular in Russia.

[1] Up to 1994 the computer was produced by ATM and MicroArt; later the firms separated and production ended.

[4] New versions called ATM Turbo 2+ and ZX Evolution were introduced.

New graphics modes offer expanded abilities: Palette: 48K Sinclair BASIC, 128K Sinclair BASIC, TR-DOS, CP/M, iS-DOS, TASiS, DNA OS, Mr Gluk Reset Service.