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serpretetsky
2[H]4U
- Joined
- Dec 24, 2008
- Messages
- 2,180
Do you guys know how much space (i dont know, measured in percentage of transistors i guess?) is kept alive on modern processors for legacy instructions, How much of the x86-64 processors exists to keep it backwards compatable with all x86 code?
For example, is x86 real mode really used for anything other dos and diagnostic programs anymore, is it really necessary? How much space is used by supporting real mode.
What about cpu instructions that are rarely used any more and considered too slow?
For example, is x86 real mode really used for anything other dos and diagnostic programs anymore, is it really necessary? How much space is used by supporting real mode.
What about cpu instructions that are rarely used any more and considered too slow?