The costs of the i386 to x86-64 upgrade
If you read my previous article on DOS memory models, you may have dismissed everything I wrote as “legacy cruft from the 1990s that nobody cares about any longer”. After all, computers have evolved from sporting 8-bit processors to 64-bit processors and, on the way, the amount of memory that these computers can leverage has grown orders of magnitude: the 8086, a 16-bit machine with a 20-bit address space, could only use 1MB of memory while today’s 64- … ⌘ Read more