The following operators can be used to better focus your queries.
( ) , AND, OR, NOT, W/#
? single char wildcard, not at start
* multi char wildcard, not at start
(Cat? OR feline) AND NOT dog?
Cat? W/5 behavior
(Cat? OR feline) AND traits
Cat AND charact*
This guide provides a more detailed description of the syntax that is supported along with examples.
This search box also supports the look-up of an IP.com Digital Signature (also referred to as Fingerprint); enter the 72-, 48-, or 32-character code to retrieve details of the associated file or submission.
Concept Search - What can I type?
For a concept search, you can enter phrases, sentences, or full paragraphs in English. For example, copy and paste the abstract of a patent application or paragraphs from an article.
Concept search eliminates the need for complex Boolean syntax to inform retrieval. Our Semantic Gist engine uses advanced cognitive semantic analysis to extract the meaning of data. This reduces the chances of missing valuable information, that may result from traditional keyword searching.
Bit width of the control store word in a horizontal microprogram-driven CPU can be minimized by alternate definition of the fields controlling branching.
English (United States)
This text was extracted from a PDF file.
This is the abbreviated version, containing approximately
86% of the total text.
Page 1 of 1
Saving Bits in a Control Store Word By Redefining Branch Fields
Bit width of the control store word in a horizontal microprogram-driven CPU
can be minimized by alternate definition of the fields controlling branching.
In a horizontal microprogram-driven machine, a key design objective is
keeping the width of the control store word to a reasonable minimum. One
approach to meeting this objective is to redefine a number of the control fields
such that the code points in these fields can convey different meanings,
depending on which definition is currently active.
In past machines, miscellaneous control fields were primary candidates for
this alternate definition scheme. In addition to alternately defining miscellaneous
control fields, the fields which control microprogram branching can be alternately
defined without risking field conflicts.
In past machines, controls such as indication of 'end' have occupied a stand-
alone bit in the microword. The 'end of instruction' control can be specified by a
code point of one of the microcode branch fields. A decode of 'end' causes
another branch field to assume a secondary definition, which can be the setting
of various instruction condition codes.
In a system where the OP code of any instruction is never required to be
uniquely decoded to provide any control information, a unique group of 'set
condition code' micro-orders is required. A stand-alone field could have been
defined for this purpose in the control store word. Al...