83:ROMCalls:4010 - Revision history

Tari: Describe key repeat handling.

2020-06-18T02:31:26Z

Describe key repeat handling.

FloppusMaximus: kbdScanCode is at 8000

2008-04-19T05:16:32Z

kbdScanCode is at 8000

Luby: 83Plus to 83

2008-04-17T20:17:39Z

83Plus to 83

Luby at 20:16, 17 April 2008

2008-04-17T20:16:47Z

Kalimero at 20:39, 13 April 2005

2005-04-13T20:39:44Z

Kalimero at 20:36, 13 April 2005

2005-04-13T20:36:22Z

New page

[[Category:83:ROMCalls:By Name:Utility|KbdScan]] [[Category:83:ROMCalls:By Name|KbdScan]] [[Category:83:ROMCalls:By Address|4010 - KbdScan]]
== Synopsis ==
'''Official Name:''' KbdScan

'''Call Address:''' 4010

This routine scans the keyboard for any key presses and updates the memory location [[83Plus:RAM:843F|kbdScanCode]].

=== Inputs ===
* none

=== Outputs ===
* ([[83:RAM:8000|kbdScanCode]]) = scan code of key press

=== Registers Destroyed ===
* ??

== Comments ==
Normally this routine is called by the interrupt handler. If interrupts are not enabled, this can be used prior to the Getcsc BCALL to achieve the same results.

← Older revision		Revision as of 02:31, 18 June 2020
Line 19:		Line 19:
	== Comments ==		== Comments ==
	Normally this routine is called by the interrupt handler. If interrupts are not enabled, this can be used prior to the [[83:ROMCalls:4014\|Getcsc]] romcall to achieve the same results.		Normally this routine is called by the interrupt handler. If interrupts are not enabled, this can be used prior to the [[83:ROMCalls:4014\|Getcsc]] romcall to achieve the same results.
		+
		+	Key repeat is handled here, when scanning the keyboard. If any of the arrow keys or DEL is held, they will first be repeated after about 48 calls and every 10 after the first. Holding other keys will not update kbdScanCode until the key is released.

← Older revision		Revision as of 20:39, 13 April 2005
Line 17:		Line 17:

	== Comments ==		== Comments ==
−	Normally this routine is called by the interrupt handler. If interrupts are not enabled, this can be used prior to the Getcsc ~~BCALL~~ to achieve the same results.	+	Normally this routine is called by the interrupt handler. If interrupts are not enabled, this can be used prior to the [[83:ROMCalls:4014\|Getcsc]] romcall to achieve the same results.

@@ Line 6: / Line 6: @@
 '''Call Address:''' 4010
-This routine scans the keyboard for any key presses and updates the memory location [[83:RAM:0000|kbdScanCode]].
+This routine scans the keyboard for any key presses and updates the memory location [[83:RAM:8000|kbdScanCode]].
 === Inputs ===
@@ Line 12: / Line 12: @@
 === Outputs ===
-* ([[83:RAM:0000|kbdScanCode]]) = scan code of key press
+* ([[83:RAM:8000|kbdScanCode]]) = scan code of key press
 === Registers Destroyed ===

@@ Line 1: / Line 1: @@
 [[Category:83:ROMCalls:By Name:Utility|KbdScan]] [[Category:83:ROMCalls:By Name|KbdScan]] [[Category:83:ROMCalls:By Address|4010 - KbdScan]]
 == Synopsis ==
 '''Official Name:''' KbdScan