mirror of
https://github.com/RevCurtisP/C02.git
synced 2024-11-24 15:31:17 +00:00
35377b5807
commit ed00e1d1b5a9783a72dade3f3676b161a9cfe287
Author: Curtis F Kaylor <revcurtis@gmail.com>
Date: Sun Sep 9 22:20:49 2018 -0400
Documented joystk, paddle, and lgtpen modules
commit ec0a5ede8d1b043fcf0094ea653255a808dbf8d3
Author: Curtis F Kaylor <revcurtis@gmail.com>
Date: Sun Sep 9 20:31:11 2018 -0400
Added joystick, paddle, and lightpen test programs
commit 7b787f432e2f4f7ae5d7f0053ade1d3586a4fad1
Author: Curtis F Kaylor <revcurtis@gmail.com>
Date: Sun Sep 9 20:30:03 2018 -0400
Updated Apple II and VIC-20 Batch Files
commit 50568294349d7e3c6b7d0d364aeaece73c9e4ab6
Author: Curtis F Kaylor <revcurtis@gmail.com>
Date: Sun Sep 9 20:28:09 2018 -0400
Separated light pen code into separate files
commit d45e59f73d55eef1d30c591d19a043ad79cfd81a
Author: Curtis F Kaylor <revcurtis@gmail.com>
Date: Sun Sep 9 19:28:56 2018 -0400
Moved code for paddles into separate include files
commit fc5c5472d758c960332ea14105d5ec4a7c8cbbfb
Author: Curtis F Kaylor <revcurtis@gmail.com>
Date: Sun Sep 9 16:15:32 2018 -0400
Added system specific module 'joystk'
26 lines
831 B
Plaintext
26 lines
831 B
Plaintext
;Paddle Controller Constants and Functions for Apple II
|
|
|
|
PADDLS EQU #4 ;Maximum Numbers of Paddles
|
|
|
|
;Read Paddle
|
|
PADDLE: LDY #0 ;Set Result to 0
|
|
CMP #PADDLS ;If Paddle# >= Max
|
|
BCS PADDLZ ; Return # of Paddles & Carry Set
|
|
TAX ;Copy Paddle# to X Register
|
|
JSR $FB1E ;Execute Monitor PREAD Routine
|
|
PADDLZ: TYA ;Copy Result to Accumulator
|
|
RTS
|
|
|
|
BUTTNS EQU #2 ;Maximum Numbers of Buttons
|
|
|
|
;Read Paddle Button
|
|
BUTTON: LDY #0 ;Set Result to 0
|
|
CMP #BUTTNS ;If Button# >= Max
|
|
BCS BUTTOZ ; Return Zero & Carry Set
|
|
TAX ;Copy Paddle# to X Register
|
|
LDA $C061,X ;Load Button Register
|
|
BPL BUTTOZ ;If Bit 7 Set
|
|
DEY ; Change Result to $FF
|
|
BUTTOZ: TYA ;Copy Result to Accumulator
|
|
RTS
|