83Plus:RAM:8442 - Revision history

Zeda: Edited name to be prettier. keyHook as opposed to KeyHook

2011-04-28T14:50:18Z

Edited name to be prettier. keyHook as opposed to KeyHook

Zeda: /* Synopsis */

2011-04-28T14:44:19Z

‎Synopsis

Zeda: Used by the OS to check for key delays and repeats.

2011-04-28T14:42:57Z

Used by the OS to check for key delays and repeats.

New page

[[Category:83Plus:RAM:By Address|8442 - KeyDelay]]
[[Category:83Plus:RAM:By Name|KeyDelay]]

== Synopsis ==
'''Unofficial Name:''' KeyDelay

'''Memory Address:''' 8442h

'''Length:''' 1 byte

This byte of RAM handles the delay between key presses. It is at 50 (or 32h) until you press a key. It then counts down to 0 while you hold the key. If the key is a repeating key (del or the arrows), it resets to 10 and then counts back down.

If used in a hook, you can modify the repeating speeds of keys as well as make all keys repeat.
== Examples ==

=== Change Delay Speed===
The following code will change the delay and repeat speed of keys. 'Delay' and 'Repeat' need to be defined.
<nowiki> SetKeyHook:
in a,(6) ;To obtain the page the hook is on (if it is on the same page)
ld hl,KeyHook
B_CALL _EnableRawKeyHook
ret
KeyHook:
.db 83h
ld b,a
ld hl,8442h
ld a,(hl)
cp 32h
jr c,NotDelay
ld a,Delay ;Change this to a number less than 50 to change the initial delay
ld (hl),a
ld a,b
ret
NotDelay:
cp 0Ah
jr nz,NotRepeat
ld a,Repeat ;Change this to a number less than 10 to change the repeat speed
ld (hl),a
NotRepeat
ld a,b
ret</nowiki>
== Comments ==
There are several bytes following and preceding this that are similar.

@@ Line 1: / Line 1: @@
-[[Category:83Plus:RAM:By Address|8442 - KeyDelay]]
+[[Category:83Plus:RAM:By Address|8442 - keyDelay]]
-[[Category:83Plus:RAM:By Name|KeyDelay]]
+[[Category:83Plus:RAM:By Name|keyDelay]]
 == Synopsis ==
-'''Unofficial Name:''' KeyDelay
+'''Unofficial Name:''' keyDelay
 '''Memory Address:''' 8442h
@@ Line 26: / Line 26: @@
          .db 83h
          ld b,a
-         ld hl,8442h
+         ld hl,8442h         ;keyDelay
          ld a,(hl)
          cp 32h

@@ Line 10: / Line 10: @@
 '''Length:''' 1 byte
-This byte of RAM handles the delay between key presses. It is at 50 (or 32h) until you press a key. It then counts  down to 0 while you hold the key. If the key is a repeating key (del or the arrows), it resets to 10 and then counts back down.
+This byte of RAM handles the delay between key presses. It is at 50 (or 32h) until a key is pressed. It then counts  down to 0 while the key is being pressed. If the key is a repeating key (del or the arrows), it resets to 10 and then counts back down.
 If used in a hook, you can modify the repeating speeds of keys as well as make all keys repeat.
 == Examples ==