Some TI-99/4A Electronics

The 50Hz TI-99/4A’s video display processor

The analogics leading to the video output

Everything from the VDP to the 6-pin DIN

CD2155, CD2156, AND CD2157 – the GPL (Graphics Programming Language) operating system and TI-BASIC. Below them, the SN76494N sound chip (3 square waves plus noise channel)

Another view of the 50Hz version of the TMS9918A

The video RAM for the TMS9929A

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