Motorola MVME172 - Manual (Page 71)

Software Support Considerations
http://www.mcg.mot.com/literature 1-53
1
Comments:
If the TBL bit is set (address $FFF40048 bit 2) the error occurred during a
command table access, otherwise the error occurred during a data access.
DMAC Off-board Error
Description:
Error encountered while the local bus side of the DMAC was attempting
to go to the VMEbus.
MPU Notification:
DMAC interrupt (when enabled).
Status:
The DLOB bit is set in the DMAC Status Register (address $FFF40048 bit
4).
Comments:
This is normally caused by a programming error. The local bus address of
the DMAC should not be programmed with a local bus address that maps
to the VMEbus. If the TBL bit is set (address $FFF40048 bit 2) the error
occurred during a command table access, otherwise the error occurred
during a data access.
DMAC LTO Error
Description:
A local bus time-out (LTO) occurred while the DMAC was local bus
master.
MPU Notification:
DMAC interrupt (when enabled).
Status:
The DLTO bit is set in the DMAC Status Register (address $FFF40048
bit 3).