mirror of
https://github.com/hsoft/collapseos.git
synced 2024-11-20 16:38:06 +11:00
14 lines
535 B
Plaintext
14 lines
535 B
Plaintext
: _updsel ( -- f, has an action button been pressed? )
|
|
_status _prevstat C@ OVER = IF DROP 0 EXIT THEN
|
|
DUP _prevstat C! ( changed, update ) ( s )
|
|
0x01 ( UP ) OVER AND NOT IF 1 _sel +! THEN
|
|
0x02 ( DOWN ) OVER AND NOT IF -1 _sel +! THEN
|
|
0x04 ( LEFT ) OVER AND NOT IF -5 _sel +! THEN
|
|
0x08 ( RIGHT ) OVER AND NOT IF 5 _sel +! THEN
|
|
0x10 ( BUTB ) OVER AND NOT IF _nxtcls THEN
|
|
( update sel in VDP )
|
|
_chk _sel C@ (emit) -1 XYPOS +!
|
|
( return whether any of the high 3 bits is low )
|
|
0xe0 AND 0xe0 <
|
|
;
|