Table of Contents
Advertisement
Chapter 12: Error Messages
Terminal Interface Messages
147
cs0 can be used on one term only
Cause: You attempted to map a second address range for global chip select
operation. Only one address range can be mapped for this purpose.
Action: You must remove the current mapper term that is assigned the cs0 attribute
before you can map a different range for global chip select operation.
148
Bus activity required to access dual ported memory
Cause: In order for the system controller to be able to access dual-port emulation
memory, the 68340 emulation processor's /AS signal must not remain active for
too long a time (more than 100 microseconds, approximately). Typically, this
situation occurs when the 68340 emulation processor attempts to access memory
that is not present.
Action: Investigate the cause of the /AS signal being active too long.
149
Register mbar valid bit not set
Register cf_mbar valid bit not set
Cause: The contents of the MBAR or CF_MBAR register must be valid (that is, bit
0 of the register must be set to 1) before you can display of modify of the SIM or
SIM configuration registers.
Action: Make sure the contents of the MBAR or CF_MBAR register are valid.
150
Program counter is odd or uninitialized
Program counter is located in guarded memory
Cause: You attempted to run or step from the current program counter when it
contains an odd value or an address that is mapped as guarded memory.
Action: When running from the current program counter, make sure it contains an
even address that is not in guarded memory.
458
Advertisement
Table of Contents
