Dmac local bus address counter, Dmac vmebus address counter – Motorola MVME172 User Manual
Page 138
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VMEchip2
2
3
The DMAC executes D64 block transfer
cycles on the VMEbus. In the block transfer
mode, the DMAC may execute byte, two-
byte and four-byte cycles at the beginning
and ending of a transfer in non-block transfer
mode. If the D16 bit is set, the DMAC
executes D16 block transfers.
DMAC Local Bus Address Counter
In the direct mode, this counter is programmed with the starting address of
the data in local bus memory.
DMAC VMEbus Address Counter
In the direct mode, this counter is programmed with the starting address of
the data in VMEbus memory.
ADR/SIZ
$FFF40038 (32 bits)
BIT
31
. . .
0
NAME
DMAC Local Bus Address Counter
OPER
R/W
RESET
0 PS
ADR/SIZ
$FFF4003C (32 bits)
BIT
31
. . .
0
NAME
DMAC VMEbus Address Counter
OPER
R/W
RESET
0 PS