Difference between revisions of "Wnk.asm"
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<CENTER><TABLE BORDER><TR><TH>Entry point</TH><TH>Function provided</TH><TH>Notes</TH></TR> | <CENTER><TABLE BORDER><TR><TH>Entry point</TH><TH>Function provided</TH><TH>Notes</TH></TR> | ||
| − | <TR><TD>WAITKEY</TD><TD>Waits for a tap on either controller</TD><TD>Specifically, waits for there to be no input on either controller, | + | <TR><TD>WAITKEY</TD><TD>Waits for a tap on either controller</TD><TD>Specifically, waits for there to be no input on either controller, followed by an input from either controller, and then no input again. Debounces the input to avoid glitches.</TD></TR> |
<TR><TD>WAITNOKEY</TD><TD>Waits for there to be no input on either controller.</TD><TD>Debounced to avoid glitches.</TD></TR></TABLE></CENTER> | <TR><TD>WAITNOKEY</TD><TD>Waits for there to be no input on either controller.</TD><TD>Debounced to avoid glitches.</TD></TR></TABLE></CENTER> | ||
<br /><br /> | <br /><br /> | ||
Revision as of 03:40, 12 September 2008
Functions Provided
| Entry point | Function provided | Notes |
|---|---|---|
| WAITKEY | Waits for a tap on either controller | Specifically, waits for there to be no input on either controller, followed by an input from either controller, and then no input again. Debounces the input to avoid glitches. |
| WAITNOKEY | Waits for there to be no input on either controller. | Debounced to avoid glitches. |
See source code below for calling convention.
Examples
(todo... please contribute!)
Notes
Source Code
;* ======================================================================== *;
;* These routines are placed into the public domain by their author. All *;
;* copyright rights are hereby relinquished on the routines and data in *;
;* this file. -- Joseph Zbiciak, 2008 *;
;* ======================================================================== *;
;; ======================================================================== ;;
;; WAITKEY Wait for release/press/release ;;
;; WAITNOKEY Wait for key release ;;
;; ======================================================================== ;;
WAITKEY PROC
PSHR R5
@@1: CALL WAITNOKEY ; Wait for release-press-release
@@wk MVI $1FE, R0
XOR $1FF, R0
BEQ @@wk
INCR PC ; skip PSHR R5
WAITNOKEY PSHR R5
@@waitnokey MVII #200, R1 ; Debounce counter
@@stillnk MVI $1FE, R0
XOR $1FF, R0
BNEQ @@waitnokey
DECR R1 ; Avoid glitches: Make sure it's good and gone
BPL @@stillnk
PULR PC
ENDP
;; ======================================================================== ;;
;; End of File: wnk.asm ;;
;; ======================================================================== ;;
