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Parsec runs!

A project log for RC2016/99: TI-99/4A clone using TMS99105 CPU

Retrochallenge 2016/10 entry and winner: try to build a TI-99/4A clone using a TMS99105 CPU and an FPGA. In a month...

erik-piehlErik Piehl 10/21/2016 at 18:010 Comments

Below is video showing how much faster this system runs Parsec when compared to the original TI-99/4A. And indeed that it does run Parsec - it is the first graphics mode 2 application I tried on the hardware. It just runs the game too bloody fast, fuel is consumes very fast and one can forget about refuelling the ship, the tunnels just fly by.

As quick recap, the system already supported quite lot of features:

But these were not enough to run Parsec. That game required support of graphics mode 2. Luckily that part very easy, before adding support for that I did not realise I was only two if-then-else VHDL statements away from that. While at that, I fixed a few bugs related to the sprite hardware.

With that the new features are:

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