Home Explore Help
Sign In
videogamepreservation
/
alienbashii
mirror of https://github.com/videogamepreservation/alienbashii
Watch 2
Star 0
Fork 0
Files Issues 0 Wiki
Tree: 175d82c786
Branches Tags
alienbashii
/
Code
/
AlienBashII
/
glens_code
/
link_code
/
keyboard_reader.s

keyboard_reader.s 1.7 KB
History Raw

12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394 
  1. 	section Bashii,CODE
    2. 

  2. 	OPT C-,D+	
    3. 

  3. 	opt NODEBUG
    4. 

  4. 	opt p=68000 		
    5. 

  5. 

  6. 	incdir	"code:AlienBashII"
    7. 

  7. 	include	"glens_code/equates.s"
    8. 

  8. 	include "glens_code/game_equates.s"	
    9. 

  9. 

  10. ************************************************
    11. 

  11. ** KEYBOARD READING ROUTINE                   **
    12. 

  12. ************************************************
    13. 

  13. Read_Keyboard
    14. 

  14. 	clr.l	d7
    15. 

  15. 	move.b	$bfec01,d7
    16. 

  16. 	ror.b	d7
    17. 

  17. 	btst.l	#7,d7
    18. 

  18. 	beq.s	No_Key_Pressed
    19. 

  19. 	andi.b	#$7f,d7
    20. 

  20. 	tst.w	Key_Status
    21. 

  21. 	beq.s	User_Key_Pressed
    22. 

  22. 	cmp.w	Last_Key,d7
    23. 

  23. 	bne.s	User_Key_Pressed
    24. 

  24. 	moveq.l	#0,d7
    25. 

  25. 	rts
    26. 

  26. No_Key_Pressed
    27. 

  27. 	cmp.w	#KEY_SHIFT1,d7
    28. 

  28. 	beq.s	Shift_Released
    29. 

  29. 	cmp.w	#KEY_SHIFT2,d7
    30. 

  30. 	bne.s	Not_Shift_Released
    31. 

  31. Shift_Released
    32. 

  32. 	clr.w	Shift_Down		
    33. 

  33. Not_Shift_Released	
    34. 

  34. 	clr.w	Key_Status	
    35. 

  35. 	moveq.l	#0,d7
    36. 

  36. 	rts
    37. 

  37. User_Key_Pressed
    38. 

  38. 	cmp.w	#KEY_SHIFT1,d7
    39. 

  39. 	beq.s	Shift_Pressed
    40. 

  40. 	cmp.w	#KEY_SHIFT2,d7
    41. 

  41. 	bne.s	Not_Shift_Pressed
    42. 

  42. Shift_Pressed	
    43. 

  43. 	move.w	#1,Shift_Down
    44. 

  44. 	clr.l	d7
    45. 

  45. 	rts
    46. 

  46. Not_Shift_Pressed	
    47. 

  47. 	move.w	d7,Last_Key
    48. 

  48. 	move.w	#1,Key_Status	;key has been pressed	
    49. 

  49. 	
    50. 

  50. *convert Key code
    51. 

  51. 	cmp.w	#126,d7
    52. 

  52. 	bgt.s	Not_Char_Key
    53. 

  53. key_in_range	
    54. 

  54. 	sub.w	#63,d7	;start from 0	
    55. 

  55. 	blt.s	Not_Char_Key
    56. 

  56. 	tst.w	Shift_Down
    57. 

  57. 	beq.s	Choose_Shift_Up_Chars
    58. 

  58. 	move.l	#Chars_With_Shift,a0
    59. 

  59. 	bra.s	Get_Key_Char
    60. 

  60. Choose_Shift_Up_Chars
    61. 

  61. 	move.l	#Chars_No_Shift,a0	
    62. 

  62. Get_Key_Char	
    63. 

  63. 	move.b	(a0,d7),d7
    64. 

  64. 	rts
    65. 

  65. Not_Char_Key		
    66. 

  66. 	cmp.w	#KEY_RETURN,d7
    67. 

  67. 	beq.s	valid_code
    68. 

  68. 	cmp.w	#KEY_DELETE,d7
    69. 

  69. 	beq.s	valid_code
    70. 

  70. 	clr.w	d7
    71. 

  71. valid_code	
    72. 

  72. 	rts
    73. 

  73. 	
    74. 

  74. Shift_Down
    75. 

  75. 	dc.w	0
    76. 

  76. Key_Status
    77. 

  77. 	dc.w	0	
    78. 

  78. Last_Key
    79. 

  79. 	dc.w	0
    80. 

  80. 	
    81. 

  81. 	
    82. 

  82. Chars_No_Shift
    83. 

  83. 	dc.b	"      /.,mnbvcxz"	;63-78
    84. 

  84. 	dc.b	"      ';lkjhgfds"	;79-94
    85. 

  85. 	dc.b	"a      poiuytrew"	;95-110
    86. 

  86. 	dc.b	"q  \+-0987654321"	;111-126		
    87. 

  87. 	
    88. 

  88. Chars_With_Shift
    89. 

  89. 	dc.b	"      ?><MNBVCXZ"
    90. 

  90. 	dc.b    "       :LKJHGFDS"
    91. 

  91. 	dc.b	"A      POIUYTREW"
    92. 

  92. 	dc.b	"Q  |+_)(*&^%$#@!"	
    93. 

  93. 	
    94. 

  94. 	xdef	Read_Keyboard
    95.