4 ms·
You don't need special instructions to talk to peripheral devices. The ISA supports that from the get go. As a licensee, you can't add instructions to the ISA,
by Followerer 6y ago
You don't need special instructions to talk to peripheral devices. The ISA supports that from the get go. As a licensee, you can't add instructions to the ISA, only ARM can do that. That's what they do, they're the custodians of the ARM architecture.