7 Manufacturer : Texas Instruments Year of Release : 1979 (TI-99/4), 1981 (TI-99/4A) Units sold : 2.8 million OS : TI BASIC (in ROM) CPU : TMS9900 @ 3 MHz RAM : 256 bytes + 16 KB VRAM Video : TMS9918A VDP Resolution : 256x192 pixels, 16 colors Sound : TMS9919 or SN94624, 3 voices + 1 noise channel Media : Cartridge, cassette, floppy disk