EMBEDDED Intel486™ PROCESSOR HARDWARE REFERENCE MANUAL
4-72
Figure 4-50. Snoop under HOLD Overlaying Pseudo-Locked Cycle
4.4.6.3 Snoop under BOFF# Overlaying a Pseudo-Locked Cycle
BOFF# is capable of fracturing any bus operation. In Figure 4-51, BOFF# fractured a current 64-
bit read cycle in clock four. If there is a snoop hit under BOFF#, the snoop write-back operation
begins after BOFF# is deasserted. The 64-bit write cycle resumes after the snoop write-back op-
eration completes.
242202-162
CLK
HOLD
EADS#
HITM#
A31–A4
A3–A2
ADS#
12345678910111213141516171819
BLAST#
CACHE#
To Processor
W/R#
0 4 8 C
INV
PLOCK#
BRDY#
HLDA
64-Bit
Read Cycle
Write Back Cycle
†
†
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