Motorola MVME1X7P User Manual
1-58
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Programming Issues
1
DMAC Offboard Error
DMAC LTO Error
Description:
Error encountered while the Local Bus side of the DMAC
was attempting to go to the VMEbus.
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).
$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.
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.
Description:
A Local Bus time-out (LTO) occurred while the DMAC
was Local Bus master.
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).
$FFF40048 bit 3).
Comments:
This indicates the DMAC attempted to access a Local Bus
address at which there was no resource. 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.
address at which there was no resource. 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.