Difference between revisions of "83Plus:BCALLs:4F4E"

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m (input added)
 
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=== Inputs ===
 
=== Inputs ===
 
* A: value to check against (mask out bits 2-7)
 
* A: value to check against (mask out bits 2-7)
 +
* set 0,(iy+3Eh) if link assist is active
  
 
=== Outputs ===
 
=== Outputs ===
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== Comments ==
 
== Comments ==
 
This is a pretty dumb entry point. I suppose it could be checking for a stable link. The OS link activity hook uses this.
 
This is a pretty dumb entry point. I suppose it could be checking for a stable link. The OS link activity hook uses this.
 +
 +
It does nothing if 0,(iy+3Eh) is set.

Latest revision as of 15:32, 28 February 2007

Synopsis

Unofficial Name: CheckLinkLines

BCALL Address: 4F4E

Checks the link port data lines to see if they match the value in A.

Inputs

  • A: value to check against (mask out bits 2-7)
  • set 0,(iy+3Eh) if link assist is active

Outputs

  • Z set if link port is same value as in A

Destroys

  • All

Comments

This is a pretty dumb entry point. I suppose it could be checking for a stable link. The OS link activity hook uses this.

It does nothing if 0,(iy+3Eh) is set.