I've found this below.
How to interpret BERR messages......
Example:
BERR0705 EXC 0: Bus error in Task "tSL1" (0x47f0000)
SR= 0x 3008, PC=0x47b6dac, Addr=0x13326390, SSW=0x070d
SR= Status register. PC=Program counter.
The Addr field here tells us it's a hardware address in Group 3, shelf 0, loop 99.
Because Thor IPB addresses are:
13G (38000-3a7fc) are IGS (where G= Group number)
13G (30000-34ffc) are PS (where G= Group number)
13G (20000-29ffc) are Network loops (where G= Group number)
13G (18038-18ffc) are Clock (where G= Group number)
13G (18020-18ff4) are 3PE (where G= Group number)
13G (0c000-odffc) are MSDL (where G= Group number)
13G (0c000-0c3c0) are SDI,ESDI,DCHI (where G= Group number)
So in the above example the Addr= 13326390 where 133= group 3 and 263= network pack hex 63 =loop 99.
Additionally
IPB space (inter processor bus)
135xxxxx Group 5 Window:
134xxxxx Group 4 Window:
133xxxxx Group 3 Window:
132xxxxx Group 2 Window:
131xxxxx Group 1 Window:
130xxxxx Group 0 Window:
100xxxxx IOP window (Input/output processor)
101b0000 Ethernet SRAM
101a0000 Ethernet Control
10180000 SCSI IOP (from CP)
10170000 RS232
10160000 Data Cartridge
10150000 Prog timer
10200000-1027ffff SRAM
10000000-1001ffff EEPROM
In this case I'm still wondering what a0010000 is for the option 11 systems?
All the best
Firebird Scrambler
Meridian 1 / Succession and BCM / Norstar Programmer in the UK
If it's working, then leave it alone!.