Cbox Read Register; Cbox Read Register Fields - Compaq AlphaServer ES45 Service Manual

D.4 Cbox Read Register
The Cbox Read Register is read only by PAL code and is an element in
the CPU or system uncorrectable and correctable machine check error
logout frame.
Table D–4 Cbox Read Register Fields
Name
C_SYNDROME_1<7:0>
C_SYNDROME_0<7:0>
C_STAT<4:0>
Description
Syndrome for the upper QW in the OW of victim that was
scrubbed. See Appendix E.
Syndrome for the lower QW in the OW of victim that was
scrubbed. See Appendix E.
Bits Error Status
00000
Either no error, or error on a speculative load, of a
B-cache victim read due to a
D-cache/B-cache miss.
00001 BC_PERR (B-cache tag parity error)
00010 DC_PERR (duplicate tag parity error)
00011 DSTREAM_MEM_ERR
00100 DSTREAM_BC_ERR
00101 DSTREAM_DC_ERR
0011X PROBE_BC_ERR
01000 Reserved
01001 Reserved
01010 Reserved
01011 ISTREAM_MEM_ERR
Continued on next page
Registers D-7