> The few fpgas which have open source tool chains are unsuitable because they are all flash based AFAIK...
Not true at all. The flagship open-source FPGAs are the Lattice iCE40 series, which are SRAM-based. There's also been significant work towards open-source toolchains for Xilinx FPGAs, which are also SRAM-based.
The real limitation is in capabilities. The iCE40 series is composed of relatively small FPGAs which wouldn't be particularly useful for this type of application.
OK? I didn't follow the efforts for Lattice because insufficient resources for my needs. I'm aware of efforts for Xilinx, but they aren't covering the SKUs/models I'm working with. Is there anything for Altera/Intel now?
I'm not aware of any significant reverse-engineering efforts for Intel FPGAs. QUIP [1] might be an interesting starting point, but there may be significant IP licensing restrictions surrounding that data.
Out of curiosity, which Xilinx models are you hoping to see support for?
Not true at all. The flagship open-source FPGAs are the Lattice iCE40 series, which are SRAM-based. There's also been significant work towards open-source toolchains for Xilinx FPGAs, which are also SRAM-based.
The real limitation is in capabilities. The iCE40 series is composed of relatively small FPGAs which wouldn't be particularly useful for this type of application.