[rescue] Sparcstation 10 woes during boot

[Zoltan HERPAI]

Hi all,

I've got an SS10 with a 501-2352 (50MHz) MBUS module, 4x16Mb memory, 
which fails to boot. The PROM has diag-switch? set to true, and it stops 
right after the "Mapping ROM" printout - if I recall correctly, "ttya 
initialized" should come after it on the serial. A replacement 501-2352 
didn't help, it sports the same issue.
CPU_#0B B B B B B  TI, TMS390Z55(3.x)B B B B B B  1Mb External cache

CPU_#1B B B B B B  ******* NOT installed *******
CPU_#2B B B B B B  ******* NOT installed *******
CPU_#3B B B B B B  ******* NOT installed *******

 B B B  <<< CPU_00000000 on MBus Slot_00000000 >>> IS RUNNING (MID = 00000008)
[...]
Allocating SRMMU Context Table
Setting SRMMU Context Register
Setting SRMMU Context Table Pointer Register
Allocating SRMMU Level 1 Table
Mapping RAM
Mapping ROM

---- CUT HERE ----

Originally it had a cgsix in it, but I've taken that outB  - assuming the 
old knowledge that it's the keyboard check which decides where the 
output should go. Or is it possible that some nvram setting forces the 
output to go to the framebuffer?

Thanks,
Zoltan H