I did expect to get some feelings of accomplishment as I was confident I could get some parts of the design working. I did not expect to finish the project with something as complete I have now. When I started the project I was looking forward to completing some pieces of a TI-99/4A compatible system. I wired the "new" and "old" parts together.īest part of the project: TI 99er community For the "new" part I went with a Xilinx Spartan 6 series field programmable logic array (FPGA), to build the rest of the computer apart from the CPU. This was the fastest processor of the TMS99 range from TI, so a good basis for an enhanced TI-99/4A. For the "old" part I used the TMS99105 CPU from 1982. I wanted to combine old and new components, to have that retro aspect. I believe I now have the world's fastest TI-99/4A compatible computer, running at 7 times the speed of the original while using a CPU from 1982, the time when the original TI-99/4A was available.
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