NEC Network Controller uPD98502 - Manual (Page 178)

CHAPTER 2 V R 4120A
178 Preliminary User’s Manual S15543EJ1V0UM
Figure 2-80. Data Check Flow on Hit_Invalidate Operations
Start
Valid bit Clear
END
Miss or Invalid
Tag Check
Hit
Figure 2-81. Data Check Flow on Hit_Writeback_Invalidate Operations
Start
Write-back
(see Figure 2-84)
END
Miss or Invalid
W bit
= 1 (dirty)
Tag Check
Valid bit Clear
Hit
= 0 (Clean)