Yes, I take your point about third-party boards becoming unavailable. This has already happened with the GOP and GODIL modules. But it's also the case that FPGA manufacturers can discontinue certain parts and packages. Xilinx have already done this with the XC9500 and XC9500XL series CPLD which are used in many projects here. It seems to be the hobbyist friendly packages that are most at risk.BrokenARM wrote: ↑Mon Feb 11, 2019 9:27 amNot putting your design down at all, I like it, but part of me is actually starting to wonder that in my case it might actually be easier/similar in BOM cost simply to take the belt and braces approach and lay a new pcb out with the original discrete logic as most of them are very inexpensive and all of them, including compatible SRAM and adders, are still active bar the DAC (although some similar u-law DACs are still active). In 100% SMT (bar the DAC) the pcb would be a fraction of the original size.
Anyway, you are welcome to use as much or as little of my work as you choose. Good luck with whatever you decide.
I am still planning to pursue the idea of a general purpose 1MHz Bus project board, that would make use of the LX9 Core board. I just need to finish decorating the hall first!