Difference between revisions of "83Plus:Ports:0A"

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'''Note:''' Do not take the information on this template page as actual documentation!
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[[Category:83Plus:Ports:By_Address|0A - Link Assist Input Buffer]]
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[[Category:83Plus:Ports:By_Name|Link Assist Input Buffer]]
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The Ports are named by their number, in hexadecimal. An example is [[83Plus:Ports:00]].
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You also must put a variation on the following code into your page to have it categorized:
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NaodW29-nowiki3327a7ea493057a000000001
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----
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== Synopsis ==
 
== Synopsis ==
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'''Port Number:''' 06h
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'''Port Number:''' 0Ah
  
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'''Function:''' Flash Memory Paging
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'''Function:''' Link Assist Input Buffer
  
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This port controls what page is swapped into the 4000h to 7FFFh range. ('''DO NOT''' take this template page as real documentation on port 6!)
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This port allows you to read the data that has been received by the link assist.
  
 
=== Read Values ===
 
=== Read Values ===
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* [00h - FFh]: The current port mapped to the memory range 4000h through 7FFFh.
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* [00h - FFh]: Byte currently in the link assist's buffer.
  
 
=== Write Values ===
 
=== Write Values ===
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* [00h - FFh]: The new page to swap in to the memory range 4000h through 7FFFh
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''None''
  
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''Note: if you would have bitwise flags for your port, label them "bit X".''
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== Comments ==
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This port only exists on the 83+ SE and the 84+.
  
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== Comments ==
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Check [[83Plus:Ports:09|port 9]] before you read this port, to see that there is valid data.  Also, do not read this port more than once per data byte received.
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The behavior of this port changes in different memory map modes.
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== Example ==
 
== Example ==
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  NaodW29-nowiki3327a7ea493057a000000002
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  <nowiki>GetByteSE:
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in a,(4)
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and 8
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jr z,LinkError
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in a,(9)
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bit 6,a
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jr nz,LinkError
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and 11h
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jr z,GetByteSE
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in a,(0Ah)
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ret</nowiki>
  
 
== Credits and Contributions ==
 
== Credits and Contributions ==
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* '''/dev/urandom:''' Because of your randomness, this project is possible.
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* '''Michael Vincent:''' Original documentation of the link assist

Revision as of 18:37, 28 March 2005

Synopsis

Port Number: 0Ah

Function: Link Assist Input Buffer

This port allows you to read the data that has been received by the link assist.

Read Values

  • [00h - FFh]: Byte currently in the link assist's buffer.

Write Values

None

Comments

This port only exists on the 83+ SE and the 84+.

Check port 9 before you read this port, to see that there is valid data. Also, do not read this port more than once per data byte received.

Example

GetByteSE:
	in a,(4)
	and 8
	jr z,LinkError
	in a,(9)
	bit 6,a
	jr nz,LinkError
	and 11h
	jr z,GetByteSE
	in a,(0Ah)
	ret

Credits and Contributions

  • Michael Vincent: Original documentation of the link assist
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