[rescue] SBusFPGA update: USB Host, 256 MiB DDR3 RAM disk, ... (Was: Re: A SBus card for SPARCstation designed in 2020...)

[Romain Dolbeau]

Le mar. 24 aoC;t 2021 C  13:49, Toby Thain <toby at telegraphics.com.au> a C)crit
:
> I think the phrase "multiple FPGAs" probably meant portability to
> multiple vendors, not "more than one". Hence the reference to nmigen.

Then it's already there :-) Litex (written in Migen rather than
nMigen) already supports FPGAs from multiple vendors ; the litex/build
directory has stuff for Xilinx, Altera, Gowin, Lattice and Microsemi.

The primary restriction is support for the more 'specific' features;
for instance the DDR3 controller requires FPGA-specific support, so
doesn't work everywhere (e.g. the MAX10 is not currently supported,
while most recent Xilinx FPGA families are).

Cordially,

--
Romain Dolbeau