mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-12-28 09:30:41 +00:00
100 lines
1.2 KiB
ArmAsm
100 lines
1.2 KiB
ArmAsm
; print menu selection, draw to draw page
|
|
|
|
; use arrow keys to scroll
|
|
; return/space selects
|
|
|
|
; X = num entries
|
|
; Y = start Y?
|
|
; OUTL/OUTH points to list to draw
|
|
|
|
; return number of response in A
|
|
; $FF = nothing
|
|
; 0..# is number of selection chosen
|
|
|
|
draw_menu:
|
|
|
|
; clear bottom
|
|
|
|
jsr clear_bottom
|
|
|
|
; make normal?
|
|
|
|
; draw list
|
|
|
|
jsr move_and_print_list
|
|
|
|
; draw arrow
|
|
|
|
lda menu_y
|
|
clc
|
|
adc menu_offset
|
|
asl
|
|
tay
|
|
lda gr_offsets+1,Y
|
|
clc
|
|
adc DRAW_PAGE
|
|
sta OUTH
|
|
clc
|
|
lda gr_offsets,Y
|
|
adc menu_x
|
|
sta OUTL
|
|
|
|
ldy #0
|
|
lda #'-'
|
|
sta (OUTL),Y
|
|
iny
|
|
sta (OUTL),Y
|
|
iny
|
|
lda #'>'
|
|
sta (OUTL),Y
|
|
|
|
; check keypress
|
|
jsr get_keypress
|
|
|
|
; keypress is in A
|
|
|
|
cmp #0
|
|
beq menu_nothing
|
|
cmp #'A'
|
|
beq dec_menu
|
|
cmp #'W'
|
|
beq dec_menu
|
|
cmp #'S'
|
|
beq inc_menu
|
|
cmp #'D'
|
|
beq inc_menu
|
|
cmp #' '
|
|
beq menu_select
|
|
cmp #13
|
|
beq menu_select
|
|
bne menu_nothing
|
|
|
|
inc_menu:
|
|
lda menu_offset
|
|
cmp menu_max
|
|
bcs menu_nothing ; don't go above max
|
|
inc menu_offset
|
|
jmp menu_nothing
|
|
|
|
dec_menu:
|
|
lda menu_offset
|
|
beq menu_nothing ; can't go below 0
|
|
dec menu_offset
|
|
jmp menu_nothing
|
|
|
|
menu_select:
|
|
lda menu_offset
|
|
jmp done_menu
|
|
|
|
menu_nothing:
|
|
lda #$ff
|
|
done_menu:
|
|
sta MENU_RESULT
|
|
|
|
rts
|
|
|
|
menu_x: .byte 12
|
|
menu_y: .byte 21
|
|
menu_max: .byte 2
|
|
menu_offset: .byte 0
|