Editing Program counter (section)

== References ==
{{Reflist|refs=
<ref name="Silberschatz_2018">{{cite book |last1=Silberschatz |first1=Abraham |last2=Gagne |first2=Greg |last3=Galvin |first3=Peter B.  |author-link1=Abraham Silberschatz |date=April 2018 |title=Operating System Concepts |url=https://www.wiley.com/en-us/Operating+System+Concepts%2C+10th+Edition-p-9781119320913 |location=United States |publisher=[[Wiley (publisher)|Wiley]] |pages=27, G-29 |isbn=978-1-119-32091-3}}</ref>
<ref name="Mead_1980">{{cite book |author-last1=Mead |author-first1=Carver |author-link1=Carver Mead |author-last2=Conway |author-first2=Lynn |author-link2=Lynn Conway |date=1980 |title=Introduction to VLSI Systems |url=https://archive.org/details/introductiontovl00mead |url-access=registration |publisher=[[Addison-Wesley]] |location=Reading, USA |isbn=0-201-04358-0}}</ref>
<ref name="IBM_1953">{{cite book |url=http://bitsavers.org/pdf/ibm/701/24-6042-1_701_PrincOps.pdf |title=Principles of Operation, Type 701 and Associated Equipment |publisher=[[IBM]] |date=1953}}</ref>
<ref name="Katzan_1971">Harry Katzan (1971), ''Computer Organization and the System/370'', [[Van Nostrand Reinhold Company]], New York, USA, LCCCN 72-153191</ref>
<ref name="ARM_AG12">{{cite web |date=2001| title=ARM Developer Suite, Assembler Guide. Version 1.2 |url=http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0068b/Bcfihdhj.html#id2766362 |publisher=[[ARM Limited]] |access-date=2019-10-18}}</ref>
<ref name="Hennessy_1990">[[John L. Hennessy]] and [[David Patterson (scientist)|David A. Patterson]] (1990), ''Computer Architecture: a quantitative approach'', [[Morgan Kaufmann Publishers]], Palo Alto, USA, {{ISBN|1-55860-069-8}}</ref>
<ref name="Randall_1982">B. Randall (1982), ''The Origins of Digital Computers'', [[Springer-Verlag]], Berlin, D</ref>
<ref name="Bell_1971">[[C. Gordon Bell]] and [[Allen Newell]] (1971), ''Computer Structures: Readings and Examples'', [[McGraw-Hill Book Company]], New York, USA</ref>
<ref name="Walker_1967">{{cite book |author-first=B. S. |author-last=Walker |date=1967 |title=Introduction to Computer Engineering |publisher=[[University of London Press]] |location=London, UK |isbn=0-340-06831-0}}</ref>
<ref name="Chambers_1984">F. B. Chambers, D. A. Duce and G. P. Jones (1984), ''Distributed Computing'', [[Academic Press]], Orlando, USA, {{ISBN|0-12-167350-2}}</ref>
<ref name="Hofstadter_1980">[[Douglas Hofstadter]] (1980), ''Gödel, Escher, Bach: an eternal golden braid'', [[Penguin Books]], Harmondsworth, UK, {{ISBN|0-14-005579-7}}</ref>
<ref name="Arnold_2020_AS">{{cite book |title=Macro Assembler AS – User's Manual |version=V1.42 |author-first=Alfred |author-last=Arnold |translator-first1=Alfred |translator-last1=Arnold |translator-first2=Stefan |translator-last2=Hilse |translator-first3=Stephan |translator-last3=Kanthak |translator-first4=Oliver |translator-last4=Sellke |translator-first5=Vittorio |translator-last5=De Tomasi |date=2020 |orig-year=1996, 1989 |chapter=E. Predefined Symbols |chapter-url=http://john.ccac.rwth-aachen.de:8000/as/as_EN.html#sect_E_ |page=Table E.3: Predefined Symbols – Part 3 |url=http://john.ccac.rwth-aachen.de:8000/as/as_EN.html |access-date=2020-02-28 |url-status=live |archive-url=https://web.archive.org/web/20200228144943/http://john.ccac.rwth-aachen.de:8000/as/as_EN.html |archive-date=2020-02-28 |quote=3.2.12. WRAPMODE […] AS will assume that the processor's program counter does not have the full length of 16 bits given by the architecture, but instead a length that is exactly sufficient to address the internal ROM. For example, in case of the [[AT90S8515]], this means 12 bits, corresponding to 4 Kwords or 8 Kbytes. This assumption allows relative branches from the ROM's beginning to the end and vice versa which would result in an out-of-branch error when using strict arithmetics. Here, they work because the carry bits resulting from the target address computation are discarded. […] In case of the abovementioned AT90S8515, this option is even necessary because it is the only way to perform a direct jump through the complete address space […]}}</ref>
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{{X86 assembly topics}}

{{CPU technologies}}

[[Category:Control flow]]
[[Category:Central processing unit]]
[[Category:Digital registers]]