Waivers and Implementation-Dependent Functionality E–29
Table E–26: 21264 Enable and Write Counters for OpenVMS Alpha and
DIGITAL UNIX
5–2 Reserved
1 When set, write to Counter 1
0 When set, write to Counter 0
R17/a1 Bits Meaning
63–48 Reserved
47–28 Counter 0 value to write; writing zeroes clears the counter
27–26 Reserved
25–6 Counter 1 value to write; writing zeroes clears the counter
5–2 Reserved
1 When set, enable and write to Counter 1
0 When set, enable and write to Counter 0
Table E–25: 21264 Write Counters for OpenVMS Alpha and DIGITAL UNIX
R17/a1 Bits Meaning