基底 きていアドレスレジスタじゃありませんでした
kiteiadoresurejisutajārimasendeshita

Noun
Desu Copula

The polite, past negative form of 基底アドレスレジスタ

1. Was not the base address register.; It wasn't the base address register.

Past/Perfective
Negative
Polite
Terminal Form
Computing