Computer Hardware User Manual

Table Of Contents
2-60 Computer Group Literature Center Web Site
VMEchip2
2
DMAC VMEbus Address Counter
In direct mode, this counter is programmed with the starting address of the
data in VMEbus memory.
DMAC Byte Counter
In direct mode, this counter is programmed with the number of bytes of
data to be transferred.
Table Address Counter
In command chaining mode, this counter should be loaded by the
processor with the starting address of the list of commands. This register
gets reloaded by the DMAC with the starting address of the current
command. The last command in a list should have bits 0 and 1 set in the
next command pointer.
ADR/SIZ $FFF4003C (32 bits)
BIT 31 . . . 0
NAME DMAC VMEbus Address Counter
OPER R/W
RESET 0 PS
ADR/SIZ $FFF40040 (32 bits)
BIT 31 . . . 0
NAME DMAC Byte Counter
OPER R/W
RESET 0 PS
ADR/SIZ $FFF40044 (32 bits)
BIT 31 . . . 0
NAME Table Address Counter
OPER R/W
RESET 0 PS