Motorola MVME172 用户手册
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.
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.
Error encountered while the local bus side of the DMAC was attempting
to go to the VMEbus.
MPU Notification:
DMAC interrupt (when enabled).
DMAC interrupt (when enabled).
Status:
The DLOB bit is set in the DMAC Status Register (address $FFF40048 bit
4).
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.
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.
A local bus time-out (LTO) occurred while the DMAC was local bus
master.
MPU Notification:
DMAC interrupt (when enabled).
DMAC interrupt (when enabled).
Status:
The DLTO bit is set in the DMAC Status Register (address $FFF40048
bit 3).
The DLTO bit is set in the DMAC Status Register (address $FFF40048
bit 3).