On Wed, 27 Nov 2019 12:47:44 -0500, Steve Smith wrote: >Notwithstanding all the expert opinions, from my point of view, XA would >have better gone to 32-bit addressing from the get-go. I don't see the >benefit of the amode being part of the address. Seems to me it's been a >lot of unnecessary complication, and we might have had twice the address >space until the advent of z/Arch. I know very little about Intel >architecture, but when 32-bit processors came out, they had 32-bit >addressing (at least logically). This is, of course, rather moot now.
Do Intel processors support bimodal addressing? Do their designers care about compatibility with existing code? -- Tom Marchant
