This means that for example that originally the bus is as fast as the clock speed of the CPU in question: 4.77 MHz for the original PC bus and 6-8 MHz for the PC/AT. Although 8-bit cards could be ...

Building a CPU out of logic gates is a great way to learn ... I/Os are limited to simple eight-bit input and output buses, but a sixteen-bit address bus gives it plenty of space to add ROM ...