[rescue] sparc10 boot problem resolved

[Arthur Wouk]

to restate the problem here is the output from a serial console:

># tip cuab
>connected
>
>           SMCC SPARCstation 10/20 UP/MP POST version VRV3.45 (09/11/95)
>
>
>CPU_#0       HyperSPARC ROSS RT620/RT626         0x00100000 Bytes ECache 
>
>CPU_#1       ******* NOT installed *******
>CPU_#2       ******* NOT installed *******
>CPU_#3       ******* NOT installed *******
>
>
>           >>>>> Power On Self Test (POST) is running .... <<<<<
>
>
>
>    <<< CPU_00000000 on MBus Slot_00000000 >>>
>     ERROR : Address = 00000000,  
>     exp[31:00] = aaaaaaaa, obs[31:00] = aaaaaa8a, xor[31:00] = 00000020Can't map device /eccmemctl at f,0
>
>Can't map device /iommu at f,e0000000
>
>Device not selected
>#1  hyperSPARC 97/01/28 15:20:13
>ok help
>Illegal Instruction
>ok ?
>108098c8 
>free-memory: bad address.
>ok 

i also tried the service manual's method which watches the leds on
boot. the caps lock led comes up and stays on. pulling all extraneous
stuff (as per the manual) and varying the sticks of ram, changes
notheing. manual says: get new mbus module.

well i did, off of ebay, put it in, and the damn thing booted up just
fine. so i guess the devices which could not be found either were on
the old mbus module, or the selection from the mbus module was fried.
does this seem correct? can anyone guess which it was?