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Ti994a console.jpg

The TI-99/4A is a home computer from Texas Instruments, successor to the TI-99/4.

The TI-99 computer system consists of

  • a console containing the main processing components, a keyboard, video socket, joystick and cassette interface, and a cartridge slot
  • peripheral devices attached to the console, either as fully cased devices, or as expansion cards which must be inserted into the Peripheral Expansion Box (P-Box)
  • software on cassettes, diskettes, and cartridges
  • various human-interface devices (joystick, later also mouse)

This is the mainboard of the TI-99/4A: