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Conference irocz::terminal_servers

Title:	Terminal Servers
Notice:	See Note 2 for Directory of important notes. Please use keywords.
Moderator:	LAVC::CAHILLON

Created:	Tue May 14 1991
Last Modified:	Fri Jun 06 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	3547
Total number of notes:	12300

3532.0. "ds90tl, fatal bugcheck" by MUNICH::BLASCH () Wed May 14 1997 10:32

    Hi,
    
    a DS90TL is having a   "Fatal bugcheck error"  with
    
    PC=07841714, SP=078c5f4c, SR=2000, C=200
    
    DS90TL uses MNENG1  V1.1a BL45-11.
    
    
    
    Does anyone know this fatal bugcheck?
    
    Thanks in advance 
    
    Birgit Blasch
    Digital Service Center Munich

T.R	Title	User	Personal Name	Date	Lines
3532.1		IROCZ::D_NELSON	Dave Nelson LKG1-3/A11 226-5358	`Wed May 14 1997 12:23`	13
	RE: .0 Crash Code 200 is code checksum failure. Somehow the executable code and constant data section of the image experienced a "change" since the last pass of checksum calculation. This checksumming constantly occurs in the background (idle time). It is most often caused by an uninitialized pointer that causes a write to code space. Virtually impossible to diagnose without a crash dump, and even then often very difficult. Regards, Dave
3532.2		TWICK::PETTENGILL	mulp	`Thu May 22 1997 22:36`	5
	How old is it? I never saw a problem with the 90TL until our last batch of 20 where we had about 5 bad ones. This was shortly before the 90TL EOL'd. Wasn't the reason for the EOL the lack of the right kind of simms/drams; my guess is that they were scraping the bottom of barrel to meet the final part commitment.
3532.3		NPSS::TAYLOR		`Fri May 23 1997 07:51`	14
	That simms are part of the reason for end of lifing the hardware and we believe may be an influence in the failures we've been seeing. We are debugging a failing module to find the root. We don't know enough just yet to say it's the simm or another component in the path. If you have a newer 90TL that's consistently crashing and are running a recient firmware image you can try swapping the simm. This worked at a couple of sites. An India site swapped out these simms: SIMM mfg is SEC Korea, SEC KMM536256BWG-8 9601 KOREA with ones labeled SAMSUNG (SEC and SAMSUNG are the same manufacturer). You can expect to see BWG-7 (70ns) and BWG-8 (80ns) parts and either should work. The part numbers are 20-35191-06 for the 70ns part and 20-35191-05 for the 80ns.