Scoreboard control

Diagrams/ScoreboardDataPath.eps

• Reservation stations (RO) hold inst$^{\rm n}$s which are executing or awaiting operands

• Inst$^{\rm n}$ is blocked in IS until reservation station is free

• Broadcast destination register of completing inst$^{\rm n}$ to enable inst$^{\rm n}$s waiting for it

• But check for WAR hazard first ((how))