NEC Network Controller uPD98502 - Manual (Page 179)

CHAPTER 2 V R 4120A
Preliminary User’s Manual S15543EJ1V0UM 179
Figure 2-82. Data Check Flow on Fill Operations
Start
Refill (see
Figure 2-85)
END
Figure 2-83. Data Check Flow on Hit_Writeback Operations
Start
Write-back (see
Figure 2-84)
END
Miss or Invalid
W bit
= 1 (dirty)
Tag Check
Hit
= 0 (Clean)
W bit clear Data cache only
Data cache only