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VME Controller ASIC
A VME controller ASIC, with the VME backplane it plugs into, manages the board com-
puter's interface to the VMEbus. The VME controller ASIC also controls the RS-232 B port
interface.
Table 1-19 shows the VME addressing capabilities and Table 1-20 shows data transfer capa-
bilities of the VME controller ASIC.
Table 1-19
VME Addressing Capabilities
DMA as master
Location monitor
Message FIFO as slave
PA memory as slave
Processor as master
Table 1-20
VME Data Transfer Capabilities
DMA as master
Message FIFO as
slave
PA memory as slave
Processor as master
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Function
A16, A24, A32 with programmable address modifiers
A16, A24, A32
A16, A24, A32
A24, A32
A16, A24, A32 with programmable address modifiers
Function
Capabilities
D08
D16
D32
D64
D08
D16, D32
D08
D16
D32
D64
D08, D16, D32
Model 743 and Model 744 VME Board Computers
Capabilities
Supported Transfer Type
Only for first cycle/last cycle alignment
Block or non-block
Block only
O
Non-block only, only D7-D0 are significant
EO
Block
Non-block only
General Information
1-23
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