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WIP open source tooling for the XC9500 / XC9500XL series of CPLDs from Xilinx.
Primary focus of efford is on the XC9572XL for now.
To get started the following documents are a good intro into the architecture:
- The Family Datasheet
- The xc3sprog code and documentation (or see submodule in
bitstream/xc3sprog)
Some initial thoughts have been made on which bits / fuses exist, but they still have to be located in the bitstream.
For example bitstreams, see themisc/bitstreams/ folder.
Nothing is done on this front yet.
A complete model of the CPLD is to be written. It should be able to be "programmed" with real bitstreams in jedec format and should behave like a real cpld.
Nothing is done on this front yet.
The primary goal is to be able to go from yosys rtlil to a working bitstream in jedec file format.Timing optimization / analysis is only secondary for now.