83Plus:BCALLs:4F4B - Revision history

Brandonw: oops

2007-02-28T22:39:39Z

oops

Brandonw: added input and hook info

2007-02-28T22:38:59Z

added input and hook info

Brandonw at 07:43, 20 February 2007

2007-02-20T07:43:17Z

New page

[[Category:83Plus:BCALLs:By Name:Link|RejectCommand]] [[Category:83Plus:BCALLs:By Name|RejectCommand]] [[Category:83Plus:BCALLs:By Address|4F4B - RejectCommand]]
== 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

=== Outputs ===
* 4 bytes received to [[83Plus:RAM:8674|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.

You also probably should not call it unless you have detected link activity (for use in the link activity hook).

@@ Line 20: / Line 20: @@
 == 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.
+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,2Ah,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.

@@ Line 10: / Line 10: @@
 * E: zero
 * A: current value of port 0
 === Outputs ===
@@ Line 19: / Line 20: @@
 == 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 hook).
+You also probably should not call it unless you have detected link activity (for use in the link activity or silent link hooks).