But what does it take to get started with ISA or PCI expansion cards today? From top to bottom: 8-bit XT bus, 16-bit AT/ISA, 32-bit EISA. An important thing to note about ISA and the original PC ...
The speed is derived from the number of parallel channels (16 bit, 32 bit, etc.) and clock speed. Also known as a "frontside bus," it is faster than the peripheral bus (PCI, ISA, etc.), ...
because many 16-bit ISA cards also supported the original 8-bit slots from the earliest PCs. The Arduino is fast enough to support the ISA bus speed, but the card also needs the PC’s clock line ...