[HECnet] PDP-11/70 on FPGA

I think F4 don't need FPP, but might also be restricted to integer only if you don't have an FPP. I think it simply worked fully even without FPP (or it might not ever use it even if one exists). F4 started in RT-11 which was aimed at small machines. That Basic+ can live without it don't surprise me, nor that it can use it if it do exist. Having said that, the following do needs FPP, as far as I know: Basic+2 No, definitely not. BP2 was used as the compiler for all RSTS utilities as pre-compiled by DEC (though B+ could be used by customers if desired). ... MAIL-11 MAIL-11 was written in Basic-Plus (or BP2) so it would work on non-FPP machines. That assumes you're not counting the earlier one that was used only internally, written in TECO and distributed by some field office clown who was fired for it... paul