Difference between revisions of "83Plus:BCALLs:8021"

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'''Note:''' Do not take the information on this template page as actual documentation!
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[[Category:83Plus:BCALLs:By_Name|WriteAByte]]
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[[Category:83Plus:BCALLs:By_Address|8021 - WriteAByte]]
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Use this template for ROMCalls on calculators that don't use banked OS calls. Simply replace every occurance of bcall/BCALL/b_call with romcall/ROMCall/call.
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[[Category:83Plus:BCALLs:By_Name:Memory|WriteAByte]]
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The BCALLs are named by their b_call address, in hexadecimal. An example is [[83Plus:BCALLs:4009]].
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Also, please put the following code (edited to reflect your call) in your page:
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NaodW29-nowiki4850b2d579873e8600000001
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This will cause your page to show in the appropriate categories. (Change the ProveTheRiemannHypothesis, 0042, and Utility to match your call. Also, change the 83Plus to whatever category, and change the BCALLs to ROMCalls if needed.) You may put a BCALL in any number of "By Name" categories. Put it in all the ones that make sense.
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----
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== Synopsis ==
 
== Synopsis ==
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'''Official Name:''' ProveTheRiemannHypothesis
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'''Official Name:''' WriteAByte
  
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'''BCALL Address:''' 0042
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'''BCALL Address:''' 8021
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''Use "Call Address" for regular 83.''
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Proves the Riemann Hypothesis, storing the proof in an AppVar.
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Writes a byte to FlashROM.
  
 
=== Inputs ===
 
=== Inputs ===
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* [[83Plus:RAM:8478|OP1]]: AppVar to save proof into
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* A = Flash page to write
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* HL: Maximum length of proof, in pages (must be at least 200)
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* DE = address to write
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* bit proofCorrect, (iy + proofFlags): Set to generate a correct proof
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* B = byte to write
  
 
=== Outputs ===
 
=== Outputs ===
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* Proof stored in AppVar
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* NZ if the byte could not be written
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* Zero Flag: Set if successful
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=== Destroys ===
 
=== Destroys ===
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* af
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* AF, DE, BC, HL
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* [[83Plus:RAM:8478|OP1]]
  
 
== Comments ==
 
== Comments ==
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This B_CALL proves the Riemann Hypothesis, giving a proof under the required number of pages. It does this by randomly guessing proofs until it finds one that works. Needless to say, the calculator's batteries will run out before this B_CALL completes.
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Flash must be [[83Plus:Ports:14|write enabled]] first.
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== Example ==
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NaodW29-nowiki4850b2d579873e8600000002
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== Credits and Contributions ==
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Note that you cannot use this to write a 1 bit over a 0.
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* '''/dev/null:''' For not answering my questions about this B_CALL
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Revision as of 16:40, 29 March 2005

Synopsis

Official Name: WriteAByte

BCALL Address: 8021

Writes a byte to FlashROM.

Inputs

  • A = Flash page to write
  • DE = address to write
  • B = byte to write

Outputs

  • NZ if the byte could not be written

Destroys

  • AF, DE, BC, HL
  • OP1

Comments

Flash must be write enabled first.

Note that you cannot use this to write a 1 bit over a 0.

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