The Arbiter may possibly take out GNT# Anytime. A device that loses GNT# might complete its existing transaction, but might not commence 1 (by asserting FRAME#) Except if it observes GNT# asserted the cycle before it commences. This command is for IBM Laptop compatibility; if there isn't any Intel 8259 https://nathanlabsadvisory.com/ncema-7000-2015-certification/