mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-11-15 02:05:16 +00:00
49 lines
1019 B
ArmAsm
49 lines
1019 B
ArmAsm
|
;==========================================================
|
||
|
|
; Get Key
|
||
|
|
;==========================================================
|
||
|
|
;
|
||
|
|
|
||
|
|
get_key:
|
||
|
|
|
||
|
|
lda KEYPRESS ; 3
|
||
|
|
bpl no_key ; 2nt/3
|
||
|
|
|
||
|
|
figure_out_key:
|
||
|
|
cmp #' '+128 ; the mask destroys space ; 2
|
||
|
|
beq save_key ; so handle it specially ; 2nt/3
|
||
|
|
|
||
|
|
and #$5f ; mask, to make upper-case ; 2
|
||
|
|
check_right_arrow:
|
||
|
|
cmp #$15 ; 2
|
||
|
|
bne check_left_arrow ; 2nt/3
|
||
|
|
lda #'D' ; 2
|
||
|
|
check_left_arrow:
|
||
|
|
cmp #$08 ; 2
|
||
|
|
bne check_up_arrow ; 2nt/3
|
||
|
|
lda #'A' ; 2
|
||
|
|
check_up_arrow:
|
||
|
|
cmp #$0B ; 2
|
||
|
|
bne check_down_arrow ; 2nt/3
|
||
|
|
lda #'W' ; 2
|
||
|
|
check_down_arrow:
|
||
|
|
cmp #$0A ; 2
|
||
|
|
bne check_escape ; 2nt/3
|
||
|
|
lda #'S' ; 2
|
||
|
|
check_escape:
|
||
|
|
cmp #$1B ; 2
|
||
|
|
bne save_key ; 2nt/3
|
||
|
|
lda #'Q' ; 2
|
||
|
|
jmp save_key ; 3
|
||
|
|
|
||
|
|
no_key:
|
||
|
|
lda #0 ; no key, so save a zero ; 2
|
||
|
|
|
||
|
|
save_key:
|
||
|
|
sta LASTKEY ; save the key to our buffer ; 2
|
||
|
|
bit KEYRESET ; clear the keyboard buffer ; 4
|
||
|
|
rts ; 6
|
||
|
|
;============
|
||
|
|
|
||
|
|
|
||
|
|
|