NEC Network Controller uPD98502 - Manual (Page 176)

CHAPTER 2 V R 4120A
176 Preliminary User’s Manual S15543EJ1V0UM
Figure 2-76. Data Check Flow on Index_Writeback_Invalidate Operations
= 0 (Clean)
Start
Write-back
(see Figure 2-84)
END
= 0 (Invalid)
W bit
= 1 (dirty)
V bit
Valid bit and
W bit Clear
= 1 (Valid)
Figure 2-77. Data Check Flow on Index_Load_Tag Operations
Start
END
Tag Read to TagLo
W bit Read to TagLo Data cache only