The means hazard occurs when the target instruction register
(target operand) at the execution stage combines with any third row instruction's source register (source target) in the decode stage.
Conversely, a star configuration would necessitate 300 individual instructions, a much-expanded instruction register
, and scan paths that were only 2 bits long.
Control instruction register
, size 500x200 mm, containing 100 pages.
The allowable use of ZBSs can only begin after a Test-Logic-Reset because this state initializes the instruction registers
with either the BYPASS or IDCODE instructions.
As an example, the initial task in debugging illegal memory reference errors is to decode the offending instruction and determine the area of memory that instruction registers