mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-12-28 09:30:41 +00:00
287 lines
4.4 KiB
ArmAsm
287 lines
4.4 KiB
ArmAsm
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;==============================
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; Handle Keypress
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;==============================
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handle_keypress:
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; first handle joystick
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lda JOYSTICK_ENABLED
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beq actually_handle_keypress
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; only check joystick every-other frame
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lda FRAMEL
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and #$1
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beq actually_handle_keypress
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check_button:
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lda PADDLE_BUTTON0
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bpl button_clear
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lda JS_BUTTON_STATE
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bne js_check
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lda #1
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sta JS_BUTTON_STATE
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lda #' '
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jmp check_sound
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button_clear:
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lda #0
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sta JS_BUTTON_STATE
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js_check:
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jsr handle_joystick
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js_check_left:
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lda value0
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cmp #$20
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bcs js_check_right ; if less than 32, left
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lda #'A'
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bne check_sound
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js_check_right:
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cmp #$40
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bcc js_check_up
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lda #'D'
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bne check_sound
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js_check_up:
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lda value1
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cmp #$20
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bcs js_check_down
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lda #'W'
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bne check_sound
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js_check_down:
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cmp #$40
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bcc done_joystick
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lda #'S'
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bne check_sound
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done_joystick:
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actually_handle_keypress:
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lda KEYPRESS
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bmi keypress
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jmp no_keypress
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keypress:
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and #$7f ; clear high bit
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cmp #' '
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beq check_sound ; make sure not to lose space
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and #$df ; convert uppercase to lower case
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check_sound:
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cmp #$14 ; control-T
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bne check_joystick
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lda SOUND_STATUS
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eor #SOUND_DISABLED
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sta SOUND_STATUS
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jmp done_keypress
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; can't be ^J as that's the same as down
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check_joystick:
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; cmp #$10 ; control-P
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cmp #'J'
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bne check_load
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lda JOYSTICK_ENABLED
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eor #1
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sta JOYSTICK_ENABLED
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jmp done_keypress
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check_load:
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cmp #$C ; control-L
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bne check_save
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; jsr load_game
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jmp done_keypress
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check_save:
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cmp #$13 ; control-S
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bne check_left
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; jsr save_game
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jmp done_keypress
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check_left:
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cmp #'A'
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beq left_pressed
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cmp #8 ; left key
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bne check_right
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left_pressed:
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lda CURSOR_X ; if 41<x<$FB don't decrement
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cmp #41
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bcc do_dec_cursor_x
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cmp #$FB
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bcc done_left_pressed
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do_dec_cursor_x:
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dec CURSOR_X
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done_left_pressed:
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jmp done_keypress
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check_right:
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cmp #'D'
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beq right_pressed
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cmp #$15 ; right key
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bne check_up
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right_pressed:
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lda CURSOR_X ; if 40<x<$FA don't increment
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cmp #40
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bcc do_inc_cursor_x
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cmp #$FA
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bcc done_right_pressed
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do_inc_cursor_x:
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inc CURSOR_X
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done_right_pressed:
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jmp done_keypress
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check_up:
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cmp #'W'
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beq up_pressed
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cmp #$0B ; up key
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bne check_down
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up_pressed:
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lda CURSOR_Y ; if 49<y<$F0 don't decrement
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cmp #49
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bcc do_dec_cursor_y
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cmp #$F0
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bcc done_up_pressed
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do_dec_cursor_y:
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dec CURSOR_Y
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dec CURSOR_Y
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done_up_pressed:
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jmp done_keypress
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check_down:
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cmp #'S'
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beq down_pressed
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cmp #$0A
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bne check_return
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down_pressed:
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lda CURSOR_Y ; if 48<y<$EE don't decrement
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cmp #48
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bcc do_inc_cursor_y
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cmp #$EE
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bcc done_down_pressed
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do_inc_cursor_y:
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inc CURSOR_Y
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inc CURSOR_Y
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done_down_pressed:
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jmp done_keypress
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check_return:
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cmp #' '
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beq return_pressed
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cmp #13
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bne done_keypress
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return_pressed:
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special_return:
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jsr handle_special
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; special case, don't make cursor visible
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jmp no_keypress
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done_keypress:
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lda #1 ; make cursor visible
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sta CURSOR_VISIBLE
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no_keypress:
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bit KEYRESET
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rts
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;============================
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; handle_special
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;===========================
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; set up jump table fakery
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handle_special:
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; ldy #LOCATION_SPECIAL_FUNC+1
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; lda (LOCATION_STRUCT_L),Y
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; pha
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; dey
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; lda (LOCATION_STRUCT_L),Y
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; pha
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rts
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;=============================
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; change direction
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;=============================
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change_direction:
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; split text/graphics
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; bit TEXTGR
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; also change sprite cutoff
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; ldx #40
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; stx psc_smc1+1
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; stx psc_smc2+1
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jmp done_split
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;no_split:
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; bit FULLGR
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; also change sprite cutoff
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; ldx #48
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; stx psc_smc1+1
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; stx psc_smc2+1
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done_split:
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ldy #0
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lda (LOCATION_STRUCT_L),Y
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sta LZSA_SRC_LO
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iny
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lda (LOCATION_STRUCT_L),Y
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sta LZSA_SRC_HI
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lda #$c ; load to page $c00
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jsr decompress_lzsa2_fast
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rts
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;=============================
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; change location
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;=============================
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change_location:
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; reset graphics
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bit SET_GR
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; reset pointer to not visible, centered
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lda #0
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sta ANIMATE_FRAME
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sta CURSOR_VISIBLE
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lda #20
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sta CURSOR_X
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sta CURSOR_Y
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lda LOCATION
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asl
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tay
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lda (LOCATIONS_L),Y
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sta LOCATION_STRUCT_L
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iny
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lda (LOCATIONS_L),Y
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sta LOCATION_STRUCT_H
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jsr change_direction
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rts
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log2_table:
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; 0 1 2 3 4 5 6 7 8
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; .byte 0,0,1,1,2,2,2,2,3
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