Difference between revisions of "83Plus:BCALLs:4F4B"
From WikiTI
m (added input and hook info) |
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| Line 10: | Line 10: | ||
* E: zero | * E: zero | ||
* A: current value of port 0 | * A: current value of port 0 | ||
| + | * set 0,(iy+3Eh) if link assist is active | ||
=== Outputs === | === Outputs === | ||
| Line 19: | Line 20: | ||
== Comments == | == Comments == | ||
| − | This is the link activity hook used by the OS. "add a,e" is actually run when you BCALL it, so make sure E is zero. I can't fathom why they did this. | + | This is the link activity hook used by the OS. "add a,e" is actually run when you BCALL it, so make sure E is zero. I can't fathom why they did this. To activate it in the OS, send 73h,29h,00h,00h to the calculator. To deactivate it (or any link activity hook), send 73h,3Ah,00h,00h. |
| − | You also probably should not call it unless you have detected link activity (for use in the link activity | + | You also probably should not call it unless you have detected link activity (for use in the link activity or silent link hooks). |
| + | |||
| + | It will not send the skip/exit packet when receiving the ready packet; it only acknowledges it. | ||
Revision as of 14:38, 28 February 2007
Synopsis
Unofficial Name: RejectCommand
BCALL Address: 4F4B
Finishes receiving a silent link command and then rejects it by sending an acknowledgement packet and then the skip/exit packet with a value of 5, then receiving an acknowledgement.
Inputs
- E: zero
- A: current value of port 0
- set 0,(iy+3Eh) if link assist is active
Outputs
- 4 bytes received to header
- A: second byte received
Destroys
- All
Comments
This is the link activity hook used by the OS. "add a,e" is actually run when you BCALL it, so make sure E is zero. I can't fathom why they did this. To activate it in the OS, send 73h,29h,00h,00h to the calculator. To deactivate it (or any link activity hook), send 73h,3Ah,00h,00h.
You also probably should not call it unless you have detected link activity (for use in the link activity or silent link hooks).
It will not send the skip/exit packet when receiving the ready packet; it only acknowledges it.
