Texas Instruments TI-99/4A
1979 TI-99/4 with RF modulator, optional Speech Synthesizer, keyboard overlays, and a cartridge. Note orange shift keys.
|Release date||June, 1981 (99/4 in June, 1979)|
|Operating system||TI BASIC|
|CPU||TI TMS9900 @ 3.0 MHz|
|Memory||256 bytes "scratchpad" RAM + 16 KB VDP (graphics RAM)|
The Texas Instruments TI-99/4A was an early home computer, released in June 1981, originally at a price of US$525. It was an enhanced version of the less successful TI-99/4 model, which was released in late 1979 at a price of $1,150. The TI-99/4A added an additional graphics mode, "lowercase" characters consisting of small capitals, and a full travel keyboard. Its predecessor, the TI-99/4, featured a calculator-style chiclet keyboard and a character set that lacked lowercase text.
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