Hi, I know this is slightly off topic but I have no idea where else to ask for more info. I'm working on getting linux to run on the DEC 3000/300 (the old turbochannel based alpha systems). Unfortunately I managed to corrupt some bytes in 1 of the 2 flash chips on the board probably while debugging the ethernet driver. The result is that the machine refuses to boot. See bootup-log.txt shows what is displayed on the serial console. The INIT-S-* sequence continues until I press the halt button on the back of the machine. When I give a test ferom command on the SRM prompt I get '? T-ERR-FEROM - IOROM CHKSUM: Read = 50, Calc = 59'. (See also test-ferom-log.txt). Trying to boot the machine always results in a single INIT-S-* sequence and then the SRM prompt (See also boot-cmd-log.txt). If read the manual correctly, there are 2 flash chips in the system, 1 mapped at 0x1.8000.0000 and 1 mapped at 0x1.e000.0000. I guess only 1 of those is corrupted. Is this true ? If so, which one ? Does the SRM code reside in the same flash or in the other flash ? Ie. if I would erase the corrupted flash, would I still be able to get to the SRM prompt ? The reason I ask is that I'm thinking of recovering the flash by writing a small program I can upload using SRM deposit commands. That program would then load a correct flash image using xmodem over the console serial port and write it to the flash. Is this approach doable ? The only other way I see is to use the SROM mini console port, but I have no idea how that port works. Thanks, Peter (p2).
>>> test ferom T-STS-FEROM - CheckSum Test ? T-ERR-FEROM - IOROM CHKSUM: Read = 50, Calc = 59 ?? 000 NI 0x0000 ?? 000 SCSI 0x0000 ?? 000 ISDN 0x0000 ?? fff FEROM 0x0008 84 FAIL >>>
DEC 3000 - M300X
Digital Equipment Corporation
System conducting power up tests
------------------------------------------------------------
Devnam Devstat
-------- -------
CPU OK KN16-CA -V7.0-S889-I21F-sV2.1 -DECchip 21064 P3.0
OSC 175 MHz
ASIC OK
MEM OK 64MB
NVR OK
CXT INIT-S-MEM...
INIT-S-NVR...
INIT-S-CXT...
INIT-S-MEM...
INIT-S-NVR...
INIT-S-CXT...
INIT-S-MEM...
INIT-S-NVR...
INIT-S-CXT...
INIT-S-MEM...
INIT-S-NVR...
INIT-S-CXT...
INIT-S-MEM...
INIT-S-NVR...
INIT-S-CXT...
INIT-S-MEM...
INIT-S-NVR...
INIT-S-CXT...
INIT-S-MEM...
INIT-S-NVR...
INIT-S-CXT...
INIT-S-MEM...
INIT-S-NVR...
INIT-S-CXT...
INIT-S-MEM...
INIT-S-NVR...
INIT-S-CXT...
INIT-S-MEM...
INIT-S-NVR...
INIT-S-CXT...
INIT-S-MEM...
?01 EXT HLT
PC= 00000000.000799F0 PSL= 00000000.00001F00
>>>
>>> boot INIT-S-CPU... INIT-S-ASIC... INIT-S-MEM... INIT-S-NVR... INIT-S-CXT...
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