NEC Network Controller uPD98502 - Manual (Page 175)

CHAPTER 2 V R 4120A
Preliminary User’s Manual S15543EJ1V0UM 175
Figure 2-74. Data Check Flow on Store Operations
Start
Write-back and
Refill (see
Figure 2-86)
END
Hit
V = 0 (invalid)
or
W = 0 (clean)
Miss
V bit, W bit
V = 1 (valid) and
W = 1 (dirty)
Refill (see
Figure 2-85)
Tag Check
Data Write
to Data Cache
Figure 2-75. Data Check Flow on Index_Invalidate Operations
Start
Valid bit Clear
END