3 ms·
Another one: the old Z-80 CPU had two sets of registers, and a single instruction to swap between the main and the alternate register set. http://landley.net/h
by pwg 8y ago
Another one: the old Z-80 CPU had two sets of registers, and a single instruction to swap between the main and the alternate register set.
http://landley.net/history/mirror/cpm/z80.html http://landley.net/history/mirror/cpm/z80.html (search for "alternate registers").
- nineteen999 8y agoSadly it appears that none of the Z80 C compilers (at least the ones I've used, Hi-Tech C and sdcc) are smart enough to use it.