I miss those days :-). The original author missed that the 386SX had the memory addressing models that the 386 had in addition to the backward compatible 286 m

I miss those days :-). The original author missed that the 386SX had the memory addressing models that the 386 had in addition to the backward compatible 286 modes. So you could access your "Lotus eXtended Memory" much more quickly than you could on a 286 based DOS machine (aka the PC/AT). A lot of businesses that ran on large Lotus spreadsheets used the 'SX for just that reason.