Protected mode using 16 bit segment:offset addressing could use more than 1 MB of memory. The segments were 64K, but the base address of each individual segme

Protected mode using 16 bit segment:offset addressing could use more than 1 MB of memory. The segments were 64K, but the base address of each individual segment was defined in a descriptor table and could point to anywhere within 24-bit addressable memory space on the 286 and 32-bit on the 386. So the 286 was limited to 16 MB of ram in 16-bit protected mode. The 386 not so. Incidentally, I had a 286 that was happy to use all the 4 MB of memory it had when running under Windows 3.1. I remember using Turbo Pascal for Windows, and being amazed that I could allocate more than 640KB — albeit in 64K segments.