Compaq EV68A specifications Index-12

Thermal design characteristics, 10–6

Tms_H signal pin, 3–6

Traps

load-load order, 2–31Mbox order, 2–31replay, 2–31store-load order, 2–31

Trst_L signal pin, 3–6

U

UNALIGN fault, 6–13

Unaligned convention, xx

UNDEFINED, xxii

UNPREDICTABLE, xxii

V

VA virtual address register, 5–4at power-on reset state, 7–15

VA_CTL virtual address control register, 5–4

at power-on reset state, 7–15updating VA_48 field, D–18

VA_FORM virtual address format register, 5–5at power-on reset state, 7–15

VAF. See Victim address file

VAX floating-point instruction opcodes, A–11VBIAS defined, 9–2

VDB. See Victim data buffer

VDBFlushRequest, 21264/EV68A command, 4–21VDD signal pin list, 3–16

VDD, values for, 9–3

VDF. See Victim data file

Vdiff defined, 9–2

Victim address file described, 2–11

Victim address file, described, 2–11Victim data buffer (VDB), 4–8Virtual address support, 1–2Virtual program counter logic, 2–2 VPC. See Virtual program counter logic VREF, values for, 9–3

VSS signal pin list, 3–16

W

WAIT_BiSI reset machine state, 7–18WAIT_BiST reset machine state, 7–18

WAIT_ClkFwdRst0 reset machine state, 7–18WAIT_ClkFwdRst1 reset machine state, 7–18WAIT_INTERRUPT reset machine state, 7–19WAIT_NOMINAL reset machine state, 7–17WAIT_RESET reset machine state, 7–18WAIT_SETTLE reset machine state, 7–17WAKEUP interrupt, 6–14

WAR, eliminating, 2–6

Warm reset flow, 7–11

WAW eliminating, 2–6

WMB instruction processing, 2–33WO,n convention, xx

Wrap order

double-pumped,4–38interleaved, 4–37

WrBytes, 21264/EV68A command, 4–22 ,4–39

Write hint instructions, translation to external interface, 4–5

WRITE_MANY chain, 5–38

example, 5–39

values for Bcache initialization, 7–12WRITE_MANY register

after fault reset, 7–8after warm reset, 7–11through sleep mode, 7–10

WRITE_ONCE chain description, 5–33

Write-after-read. See WAR

Write-after-write. See WAW

WrLWs, 21264/EV68A command, 4–22 ,4–39WrQWs, 21264/EV68A command, 4–22 ,4–39

WrVictimBlk, 21264/EV68A command, 4–22 ,4–39

system probes, with, 4–41

X

X convention, xxi

Index–12 21264/EV68A Hardware Reference Manual