Difference between revisions of "83Plus:BCALLs:4F4E"
From WikiTI
m (input added) |
|||
| Line 9: | Line 9: | ||
=== 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 === | ||
| Line 18: | Line 19: | ||
== 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 14:32, 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.
