Bitfields for AMD-640 CPU-to-PCI Flow Control 2 register:
Bit(s) Description )
7 unsuccessful retry (16 or 64 times) has occurred (write-clear)
6 retry timeout action
0 retry continuously, recording status
1 flush buffer; if reading, return FFFFFFFFh
5-4 retry count and backoff
00 retry twice, backoff processor
01 retry 16 times, set bit 7 on failure
10 retry four times, backoff processor
11 retry 64 times, set bit 7 on failure
3 discard failed data from write buffer when retry fails
2 backoff processor if PCI read retry fails
1 assert FRAME# one cycle earlier than indicated by offset 71h bit 1
0 reduce TRDY#-to-BRDY# by one HCLK on processor reads of PCI target
SeeAlso: #00983,#01005,#01007