The project builds on the work of another similar one which couldn’t be made to work, and the Trident card used couldn’t be driven in 8-bit ISA mode. The web of PC backwards compatibility ...

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 ...