> The 286 was a 16-bit processor, which means that the 286 could now address up to 16 MB of RAM! The 80286 was a 16-bit processor but had a 24-bit address bus

> The 286 was a 16-bit processor, which means that the 286 could now address up to 16 MB of RAM! The 80286 was a 16-bit processor but had a 24-bit address bus which is what allowed it to access 16MB of RAM. The 8088/8086 were also 16-bit processors but had a 20-bit address bus which limited them to 1MB. The Z80 and 6502 were 8-bit CPUs with 16-bit address buses which limited them to 64KB.