• Direct writing of processor status word down to syndrome register when syndrome register is external for AZ—flags N, Z, V, and C all might be sent out.
PZ inputs and outputs iPZ oPZ:
• data or control lines from internal bus,
• data path for memory to upload in AZ,
• writing of the result of instruction to output buffers using bus,
• direct access to memory, and
• dual-port memory.
As a small challenge, we invite a reader to present own examples for IZ input and
outputs.
INTERFACE
ZONE
PASSIVE
ZONE
ACTIVE
ZONE
INFORMATION INPUTS
Fig. 17.10 Hardware segments of CA including information exchange options
INTERFACE
ZONE
PASSIVE
ZONE
ACTIVE
ZONE
INFORMATION INPUTS
Fig. 17.11 Separation of input and output options for each zone
17.5 Hardware Performance
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