6502/cc65
1
0
Fork 0
mirror of https://github.com/cc65/cc65.git synced 2024-07-05 06:28:57 +00:00
Code Issues Projects Releases Wiki Activity

Adjusted to recent driver interface change.

Browse Source 
The change is inspired by the code of the standard joystick driver. It is however absolutely untested.

Note: Sites like http://raster.atariportal.cz/english.htm state that there needs to be a delay when reading joysticks via the MultiJoy adapter. There's no such delay in the driver. But I don't dare to decide to add it.
This commit is contained in:
Oliver Schmidt 2017-08-20 11:49:02 +02:00
parent 7f52a770d9
commit 0c54a19a0b
1 changed files with 6 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
libsrc/atari/joy/atrmj8.s
View File

@ -35,17 +35,6 @@
.addr $0000
; Button state masks (8 values)
.byte $02 ; JOY_UP
.byte $04 ; JOY_DOWN
.byte $08 ; JOY_LEFT
.byte $10 ; JOY_RIGHT
.byte $01 ; JOY_FIRE
.byte $00 ; JOY_FIRE2 not available
.byte $00 ; Future expansion
.byte $00 ; Future expansion
; Jump table.
.addr INSTALL
@ -115,10 +104,12 @@ READJOY:
; Read joystick
lda PORTA ; get position
and #%00001111
lda STRIG0 ; get button
asl a
ora TRIG0 ; add button information
eor #%00011111
asl a
asl a
asl a
ora PORTA ; add position information
eor #$1F
ldx #0 ; fix X
rts