mirror of
https://github.com/hsoft/collapseos.git
synced 2024-11-27 11:48:06 +11:00
13 lines
560 B
Plaintext
13 lines
560 B
Plaintext
|
: _prevstat [ PAD_MEM LITN ] ;
|
||
|
|
: _sel [ PAD_MEM 1+ LITN ] ;
|
||
|
|
: _next [ PAD_MEM 2+ LITN ] ;
|
||
|
|
|
||
|
|
( Put status for port A in register A. Bits, from MSB to LSB:
|
||
|
|
Start - A - C - B - Right - Left - Down - Up
|
||
|
|
Each bit is high when button is unpressed and low if button is
|
||
|
|
pressed. When no button is pressed, 0xff is returned.
|
||
|
|
This logic below is for the Genesis controller, which is modal.
|
||
|
|
TH is an output pin that swiches the meaning of TL and TR. When
|
||
|
|
TH is high (unselected), TL = Button B and TR = Button C. When
|
||
|
|
TH is low (selected), TL = Button A and TR = Start. )
|