135 lines
3.5 KiB
ArmAsm
135 lines
3.5 KiB
ArmAsm
*
|
||
* ORCA/M Format!!
|
||
* @JBrooksBSI fast Dual Axis Paddle Read
|
||
*
|
||
case on
|
||
longa on
|
||
longi on
|
||
|
||
* ORCA is neat
|
||
DummyPaddles start ASMCODE
|
||
end
|
||
|
||
*PEEK 49249 - PADDLE 0 BUTTON (>127 IF BUTTON PRESSED)
|
||
*PEEK 49250 - PADDLE 1 BUTTON (>127 IF BUTTON PRESSED)
|
||
*PEEK 49251 - PADDLE 2 BUTTON (>127 IF BUTTON PRESSED)
|
||
|
||
*
|
||
* XRick GS C Interface to read
|
||
* the joystick, and the button
|
||
*
|
||
paddle0 start ASMCODE
|
||
ds 2
|
||
paddle1 entry
|
||
ds 2
|
||
paddle_button0 entry
|
||
ds 2
|
||
|
||
ReadPaddles entry
|
||
phb
|
||
phk
|
||
plb
|
||
|
||
jsr GetJoyXY
|
||
|
||
stx paddle0
|
||
sty paddle1
|
||
|
||
lda >$E0C061
|
||
and #$0080
|
||
sta paddle_button0
|
||
|
||
plb
|
||
rtl
|
||
end
|
||
|
||
*
|
||
*-------------------------------
|
||
* IIGS 1MHz single-pass GetJoyXY
|
||
*
|
||
* 10/21/2018 by John Brooks
|
||
*-------------------------------
|
||
|
||
*-------------------------------
|
||
* Read JoyX,Y every 11cyc on avg
|
||
* Return: X=JoyX, Y=JoyY
|
||
GetJoyXY start ASMCODE
|
||
php ;Save irq & mx reg size
|
||
sep #$34 ;sei & 8-bit mx
|
||
|
||
longa off
|
||
longi off
|
||
|
||
phd ;Save DPage
|
||
pea $C000 ;DP to I/O
|
||
pld ;DP=$C000
|
||
|
||
bit $70 ;Start X,Y timers. ~16c to 1st read
|
||
* cyc on
|
||
lsr $36 ;5: Force 1MHz
|
||
ldx #1 ;2: Init dual X,Y ctr
|
||
xba ;3: Wait
|
||
xba ;3: Wait
|
||
_DualXY0 anop
|
||
lda $64 ;3: Chk JoyX. 10c to DualXY1
|
||
* cyc on
|
||
and $65 ;3: Chk JoyY
|
||
bpl _ToSolo ;2/3
|
||
inx ;2: Inc XY
|
||
_DualXY1 anop
|
||
lda $64 ;3: Chk JoyX. 10c to DualXY2
|
||
* cyc on
|
||
and $65 ;3: Chk JoyY
|
||
bpl _ToSolo ;2/3
|
||
inx ;2: Inc XY
|
||
_DualXY2 anop
|
||
lda $64 ;3: Chk JoyX. 13c to DualXY0
|
||
* cyc on
|
||
and $65 ;3: Chk JoyY
|
||
bpl _ToSolo ;3
|
||
inx ;2: Inc XY
|
||
bne _DualXY0
|
||
_DualXY3 anop
|
||
lda $64 ;3: Chk JoyX and $65 ;3: Chk JoyY
|
||
bmi _SameXY ;3
|
||
dex ;#$FE
|
||
_SameXY anop
|
||
dex ;#$FF
|
||
txy
|
||
bra _Exit
|
||
|
||
_SoloX anop
|
||
bit $64 ;3: Chk JoyX
|
||
bmi _SoloXOk ;2/3
|
||
dey ;2
|
||
bra _Exit
|
||
_SoloXOk anop
|
||
inx ;2
|
||
bne _SoloX ;2/3
|
||
* ;#$FF. Fall into dex & Exit
|
||
|
||
_SoloY anop
|
||
bit $65 ;3: Chk JoyY
|
||
bmi _SoloYOk ;2/3
|
||
dex ;2
|
||
bra _Exit
|
||
_ToSolo anop
|
||
txy ;2
|
||
bit $64 ;3
|
||
bmi _SoloXOk ;2/3
|
||
bit $65 ;3
|
||
bpl _SameXY ;2/3
|
||
_SoloYOk anop
|
||
iny ;2
|
||
bne _SoloY ;2/3
|
||
dey ;#$FF. Fall into Exit
|
||
|
||
_Exit anop
|
||
rol $36 ;Restore CPU speed
|
||
|
||
pld ;Restore dpage
|
||
plp ;Restore m,x size & interrupt enable
|
||
rts ;Returns X=JoyX $00-$FF, Y=JoyY $00-$FF
|
||
end
|
||
* lst off
|