A quick look at the pinouts of an Intel 8086 & 8088 processor reveals a 20 bit address bus. There was high demand for the ability to address 1 meg (2^20) of address space, and Intel delivered. However ...
Processor Local Bus (PLB) General processor local bus Synchronous, nonmultiplexed bus Separate Read, Write data buses Supports concurrent Read, Writes Multimaster, programmable-priority, arbitrated ...
This may very well be the smallest homemade TTL CPU we’ve ever seen. Measuring at one square inch, this tiny chip boasts 40 connections, an 8-bit databus, a 16-bit address bus, a 64 kB memory space, ...