Differences

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--- keyscan-codes [2016/05/18 08:42] – created darkbyte
+++ keyscan-codes [2017/02/16 13:23] (current) – darkbyte
@@ Line 1: / Line 1: @@
-==== return codes from keyscan $028e ====
+====Return codes from keyscan $028e====
+----
 <code z80>
 keyscan		call	$028e
 		ld	a,e
-		cp	'return code'
+		cp	"return code"
 		jr	z,key1
-		cp	'return code'
+		cp	"return code"
 		jr	z,key2
 		....
@@ Line 20: / Line 22: @@
 ;   A $26   S $1E   D $16   F $0E   G $06   H $01   J $09   K $11   L $19 ENT $21
 ;  CS $27   Z $1F   X $17   C $0F   V $07   B $00   N $08   M $10  SS $18 SPC $20
+;
+;Other usage is INKEY$ with return code in ASCII
+;input: none
+;output: a = ASCII code of pressed key, or $00 if nothing was pressed or bad combination
+inkey		call	$028e
+		jr	nz,iaa
+		call	$031e
+		jr	nc,iaa
+		dec	d
+		ld	e,a
+		call	$0333
+		or	a
+		db	$06
+iaa		xor	a
+		ret
 </code>
-Navigation: [[general]] . [[math]] . [[graphic]] . [[sound]] . [[system]] . [[other]] . back to [[start]]
+----
+**Navigation: [[general]] . [[math]] . [[graphic]] . [[sound]] . [[system]] . [[other]] . back to [[start]]**