Help with joystick movement (5200)

[Dutchman2000]

Cafeman-

 

I found it, but one question...

 

cmp #c_STICK_PULLED_LEFT

bmi JoystickMoveLeft -->> What is this?

 

cmp #c_STICK_PULLED_RIGHT

bpl JoystickMoveRight -->> and this?

 

these must be subroutines I don't have...

[+Cafeman]

Oh, yeah, I didn't do it that way. I just used simpler statements like this:

 

cmp #$1A

bmi JoystickMoveLeft

 

Just use literals.

 

[ 11-26-2001: Message edited by: Cafeman ]

[calamari]

I'm guessing those are fake labels.. imagine that those will jump to places in your code for what to do when the joytick is moved in the specified direction.

 

Example:

.

.

.

cmp #c_STICK_PULLED_UP

bmi JoystickMoveUp

 

cmp #c_STICK_PULLED_DOWN

bpl JoystickMoveDown

rts

.

.

. other code here, etc

.

.

JoystickMoveUp:

; here is where you put your routines for

; what to do if the joystick was moved in

; the up direction

.

.

.

.

 

HTH,

calamari

 

[ 11-26-2001: Message edited by: calamari ]

[+Cafeman]

Oh. I think I misunderstood what part of the code you were confused about! Don't mind me, I'm old and swiss-cheese for brains.

 

Yeah, here is literally what I have in my routine:

 

code:

---

horizmove

 

lda SPOT0

; Check the value of POT0 to see if the joystick is centered. The

; documentation states that the POT range is 0-228.

;added on 10/27/01 per debro:

lsr ;divide by 2 to prevent overflow

cmp #$1A ; stick pulled left

bmi mvleft

cmp #$50 ; stick pulled right

bpl mvright

;end of added new code on 10/27/01

 

rts

horizmove1

 

clc

sbc #$78 ; Subtract 120 from the POT0 value

 

bmi mvleft ; If this value is negative then the

; user is pushing to the left

mvright

cpx #$CA ; If the player is at the right most (used to be $B0)

; side of the playfield then don't

bne mvright1 ; move right

rts

mvright1

lda leftright

sta PrevDir ; save off previous direction faced, for middle animation

lda #$01 ; this code means draw right-facing helicoper

sta leftright

inx ; Move 1 pixels to the right

rts

 

mvleft

cpx #$30 ; If the player is at the left most (used to be $40)

; side of the playfield then don't

bne mvleft1 ; move left.

rts

mvleft1

lda leftright

sta PrevDir ; save off previous direction faced, for middle animation

lda #$00 ; this code means draw right-facing helicoper

sta leftright

dex ; Move 1 pixels to the left

 

rts

 

---

 

[ 11-26-2001: Message edited by: Cafeman ]

[Dutchman2000]

Thanks!

 

Is it the same for vertical movement??

[Dutchman2000]

Still having problems, here is my movement code:

 

;************ Horizontal move ****************************************

 

horizmove

 

lda SPOT0

lsr ; Divide by 2 to prevent overflow...

 

cmp #$1A ; stick pulled left

bmi mvleft

cmp #$50 ; stick pulled right

bpl mvright

ldy #$00 ; clear hmove flag

sty hmFlag

rts

horizmove1

ldy #$01

sty hmFlag ; set hmove flag

clc

sbc #$78 ; Subtract 100 from the POT0 value

 

bmi mvleft ; If this value is negative then the

; user is pushing to the left

;

; FALL THROUGH

;

 

mvright

cpx #$C8 ; If the player is at the right most

bne mvright1 ; side of the playfield then don't move right

 

ldy #$01 ;right

jsr changeroom

rts

mvright1

 

inx ; Move 1 pixels to the right

 

lda bFrame ; If animation is already in the direction

cmp #

beq mvrs

lda #

sta pFrame

sta bFrame

lda #

sta mFrame

lda #

sta sFrame

mvrs rts

 

mvleft

cpx #$30 ; If the player is at the left most

bne mvleft1 ; side of the playfield then don't move left

 

ldy #$00 ;left

jsr changeroom

rts

mvleft1

 

dex ; Move 1 pixels to the left

 

lda bFrame ; If animation is already in this direction

cmp #

beq mvls

lda #

sta pFrame

sta bFrame

lda #

sta mFrame

lda #

sta sFrame

mvls rts

 

 

;************ Vertical move ****************************************

 

vertmove

 

lda SPOT1

cmp #$1A ; stick pulled up

bmi vertmove1

 

cmp #$50 ; stick pulled down

bne vertmove1

ldy #$00

sty vmFlag ; clear vmove Flag

rts

vertmove1

 

ldy #$01

sty vmFlag ; set vmove Flag

clc

sbc #$78 ; Subtract 100 from the POT1 value

 

bmi mvup ; If this value is negative then the

; user is pushing to the left

;

; FALL THROUGH

;

 

mvdown

lda pmbase0

cmp lowbound

bne mvdown1

 

ldy #$03 ;down

jsr changeroom

rts

mvdown1

inc pmbase0

rts

 

mvup

lda pmbase0

cmp topbound

bne mvup1

 

ldy #$02 ;up

jsr changeroom

rts

mvup1

dec pmbase0

rts

 

any suggestions??

[DEBRO]

What are your results with this routine?

 

Also I'm assuming you are using the low and high byte notation with the &gt and &lt in your code. If you post that here you must use "& + lt" for a less than sign and "& + gt" for a greater than sign.

 

Try it with those combinations because right now the code is hard to read without them.

[Dutchman2000]

Having a problem with airworld, the character constantly runs up and to the left no matter what you do with the stick. I am using Debro's original joystick code. I built a ROMCART and it show's this behavior on the real deal. Any tips on how to acheive full movement??

[Dutchman2000]

Fixed it!

 

Just needed to change a bne to a bpl....