Register Descriptions

26’Forward’ Overlapping ’Forward’; Card A (FWMDI1)

Indicates FWMDI sampled asserted while a store transaction is in progress

25’Load’ Overlapping ’Load’; Card A (LRMDI1)

Indicates LRMDI sampled asserted while a store transaction is in progress

24’Load’ Overlapping ’Forward’; Card A (WrRd1)

Memory interface 1 detected simultaneous read and write operation. Write and Read collision.

23’Forward’ Overlapping ’Load’; Card A (RdWr1)

Memory interface 1 detected simultaneous read and write operation. Read and write collision.

22’Forward’ Underflow; Card A Right Stack Error (FR1)

Memory interface 0 received Forward right Bank without corresponding Store command

21’Forward’ Underflow; Card A Left Stack Error (FL1)

Memory interface received Forward left Bank without corresponding Store command

20’Accept Underflow’; Card A (AE1)

Memory interface 0 received data without corresponding Accept command

19’Forward’ Overlapping ’Forward’; Card B (FWMDI0)

Indicates FWMDI sampled asserted while a store transaction is in progress

18’Load’ Overlapping ’Load’; Card B (LRMDI0)

Indicates LRMDI sampled asserted while a store transaction is in progress

17’Load’ Overlapping ’Forward’; Card B (WrRd0)

Memory interface 1 detected simultaneous read and write operation. Write and Read collision.

16’Forward’ Overlapping ’Load’; Card B (RdWr0)

Memory interface 1 detected simultaneous read and write operation. Read and write collision.

15’Forward’ Underflow; Card B Right Stack Error (FR0)

Memory interface 0 received Forward right Bank without corresponding Store command

14’Forward’ Underflow; Card B Left Stack Error (FL0)

Memory interface received Forward left Bank without corresponding Store command

13’Accept’ Underflow; Card B (AE0)

Memory interface 0 received data without corresponding Accept command

12Configuration Information Parity Error (CIE)

Data buffer detected data parity while reading config address or data from SDC RAM.

11Response Bus Transmission Error (RTE)

Indicates that the SDCRSP bus detected a transmission error.

10PDB - ITID Parity Error (IPE)

Look in ITID_FERR Register to isolate.

9PDB - Command Parity Error (CPE) Look in CMD_FERR Register to isolate.8PDB Byte Enable Parity Error (BPE)

Parity error on the Byte-enables from the SAC.

7SDC Data Buffer RAM Parity Error (RPE)

SDC detected bad parity on good data stored in its data buffer. Indicates potential RAM cell disturbance due to alpha or cosmic hit. All four data port map to this bit.

6PDB - Data Parity Error (DPE)

Parity Error Detected on transfer of Data from SAC to SDC.

Intel® 460GX Chipset Software Developer’s Manual

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