User`s guide

The XMI

2.4.2.1 Command Field

The Command ﬁeld is XMI D<63:60> L. The Command ﬁeld speciﬁes the

transaction being initiated in the command cycle. (See Table 2–10.)

Table 2–10 XMI Command Codes

XMI D<63:60> L

Logic Levels

63 62 61 60 Command Mnemonic

0 0 0 0 Reserved

0 0 0 1 Read READ

0 0 1 0 Interlock Read IREAD

0 0 1 1 Ownership Read OREAD

0 1 0 0 Disown Write Mask DWMASK

0 1 0 1 Reserved

0 1 1 0 Unlock Write Mask UWMASK

0 1 1 1 Write Mask WMASK

1 0 0 0 Interrupt INTR

1 0 0 1 Identify IDENT

1 0 1 0 Reserved

1 0 1 1 Tag Bad Data TBDATA

1 1 0 0 Reserved

1 1 0 1 Reserved

1 1 1 0 Reserved

1 1 1 1 Implied Vector Interrupt IVINTR

2–24