Over on YouTube [The 8-Bit Guy] shows us how the TI-99/4A home computer worked. When they were designing the system the TI-99/4A engineers had been considering an 8-bit CPU but they settled on the 16-bit TMS9900 instead. However, much of the board had already been designed for an 8-bit CPU, which lead it to being a bit of a weird hybrid. [The 8-Bit Guy] goes on to discuss the computer architecture, the Graphic Programming Language (GPL), and its various BASIC implementations. If you’re interested in the TI-99/4A check out Persistence Pays In TI-99/4A Cassette Tape Data Recovery and Don’t Mess With Texas – The TI-99/4A Megademo.