cc65/libsrc/vic20/kbhit.s

;
; Ullrich von Bassewitz, 06.08.1998
;
; unsigned char kbhit (void);
;

	.export		_kbhit

	.include	"vic20.inc"


.proc   _kbhit

        ldx     #0              ; High byte of return is always zero
	lda	KEY_COUNT	; Get number of characters
        beq     L9
        lda     #1
L9:     rts

.endproc
Added VIC20 port changes from Steve Schmidtke git-svn-id: svn://svn.cc65.org/cc65/trunk@1376 b7a2c559-68d2-44c3-8de9-860c34a00d81 2002-08-07 05:18:13 +00:00			`;`
			`; Ullrich von Bassewitz, 06.08.1998`
			`;`
Squeezed bytes and cycles out of the kbhit functions for almost all platforms. git-svn-id: svn://svn.cc65.org/cc65/trunk@4480 b7a2c559-68d2-44c3-8de9-860c34a00d81 2009-11-24 18:31:16 +00:00			`; unsigned char kbhit (void);`
Added VIC20 port changes from Steve Schmidtke git-svn-id: svn://svn.cc65.org/cc65/trunk@1376 b7a2c559-68d2-44c3-8de9-860c34a00d81 2002-08-07 05:18:13 +00:00			`;`

			`.export _kbhit`

			`.include "vic20.inc"`

Squeezed bytes and cycles out of the kbhit functions for almost all platforms. git-svn-id: svn://svn.cc65.org/cc65/trunk@4480 b7a2c559-68d2-44c3-8de9-860c34a00d81 2009-11-24 18:31:16 +00:00
			`.proc _kbhit`

			`ldx #0 ; High byte of return is always zero`
Added VIC20 port changes from Steve Schmidtke git-svn-id: svn://svn.cc65.org/cc65/trunk@1376 b7a2c559-68d2-44c3-8de9-860c34a00d81 2002-08-07 05:18:13 +00:00			`lda KEY_COUNT ; Get number of characters`
Squeezed bytes and cycles out of the kbhit functions for almost all platforms. git-svn-id: svn://svn.cc65.org/cc65/trunk@4480 b7a2c559-68d2-44c3-8de9-860c34a00d81 2009-11-24 18:31:16 +00:00			`beq L9`
			`lda #1`
			`L9: rts`
Added VIC20 port changes from Steve Schmidtke git-svn-id: svn://svn.cc65.org/cc65/trunk@1376 b7a2c559-68d2-44c3-8de9-860c34a00d81 2002-08-07 05:18:13 +00:00
Squeezed bytes and cycles out of the kbhit functions for almost all platforms. git-svn-id: svn://svn.cc65.org/cc65/trunk@4480 b7a2c559-68d2-44c3-8de9-860c34a00d81 2009-11-24 18:31:16 +00:00			`.endproc`
Added VIC20 port changes from Steve Schmidtke git-svn-id: svn://svn.cc65.org/cc65/trunk@1376 b7a2c559-68d2-44c3-8de9-860c34a00d81 2002-08-07 05:18:13 +00:00