The interrupt sequence saves very little CPU state, leaving that to the IRQ handler, and the CPU doesn't appear to generate IRQ ACK signals. A linked page (htt

The interrupt sequence saves very little CPU state, leaving that to the IRQ handler, and the CPU doesn't appear to generate IRQ ACK signals. A linked page (http://wilsonminesco.com/6502interrupts/index.html http://wilsonminesco.com/6502interrupts/index.html) has a table (at the bottom) that lists various CPUs and IRQ latency.