This is an old sub-project, but it helps show what's available. It's a microcode-level emulator of a basic CFT system. It's very slow compared to the real thing. On a good modern computer, you can get a 1 kHz clock. The CFT itself runs at 4 MHz.
But it shows what's available and how the front panel works.
Give it a try here, on the BedroomLAN site.