cc65/libsrc/apple2/kbhit.s

;
; Kevin Ruland
; Ullrich von Bassewitz, 2005-03-25
;
; unsigned char kbhit (void);
;

        .export _kbhit

        .include "apple2.inc"

_kbhit:
        lda     KBD             ; Reading KBD checks for keypress
        rol                     ; if high bit is set, key was pressed
        lda     #$00
        tax
        rol
        rts
New version from Oliver Schmidt git-svn-id: svn://svn.cc65.org/cc65/trunk@3421 b7a2c559-68d2-44c3-8de9-860c34a00d81 2005-03-26 17:03:30 +00:00			`;`
			`; Kevin Ruland`
			`; Ullrich von Bassewitz, 2005-03-25`
			`;`
			`; unsigned char kbhit (void);`
			`;`
This commit was generated by cvs2svn to compensate for changes in r2, which included commits to RCS files with non-trunk default branches. git-svn-id: svn://svn.cc65.org/cc65/trunk@3 b7a2c559-68d2-44c3-8de9-860c34a00d81 2000-05-28 13:40:48 +00:00
Cosmetic changes requested by Oliver Schmidt git-svn-id: svn://svn.cc65.org/cc65/trunk@3431 b7a2c559-68d2-44c3-8de9-860c34a00d81 2005-03-30 18:17:57 +00:00			`.export _kbhit`
This commit was generated by cvs2svn to compensate for changes in r2, which included commits to RCS files with non-trunk default branches. git-svn-id: svn://svn.cc65.org/cc65/trunk@3 b7a2c559-68d2-44c3-8de9-860c34a00d81 2000-05-28 13:40:48 +00:00
New version from Oliver Schmidt git-svn-id: svn://svn.cc65.org/cc65/trunk@3421 b7a2c559-68d2-44c3-8de9-860c34a00d81 2005-03-26 17:03:30 +00:00			`.include "apple2.inc"`
This commit was generated by cvs2svn to compensate for changes in r2, which included commits to RCS files with non-trunk default branches. git-svn-id: svn://svn.cc65.org/cc65/trunk@3 b7a2c559-68d2-44c3-8de9-860c34a00d81 2000-05-28 13:40:48 +00:00
Cosmetic changes requested by Oliver Schmidt git-svn-id: svn://svn.cc65.org/cc65/trunk@3431 b7a2c559-68d2-44c3-8de9-860c34a00d81 2005-03-30 18:17:57 +00:00			`_kbhit:`
			`lda KBD ; Reading KBD checks for keypress`
New version from Oliver Schmidt git-svn-id: svn://svn.cc65.org/cc65/trunk@3421 b7a2c559-68d2-44c3-8de9-860c34a00d81 2005-03-26 17:03:30 +00:00			`rol ; if high bit is set, key was pressed`
			`lda #$00`
			`tax`
			`rol`
			`rts`