Help with Shop Tile

[tbizzle]

What I am trying to accomplish with this tile is:

#1. I want the tile to be able to subtract a value of 50 from my "myScore" variable, which has 8 places "00000050".

#2. If the "myScore" variable has a vaule of under 50, I want to RTS. (Just abort the script entirely)

#3. If the myScore has a value of 50 or over, I want the tile to subtract 50 from myScore and also add 10 to myAmmo.

#4. If myAmmo has a value of 90 or over, I want to RTS (abort the script) as well.

I am going for a Zelda type shop tile:

My code so far:

LDA myScore+1    ;; the hundreds digit of myCash
        CMP #5   ;; the "5" in 500    
        BCS +definitelyEnoughMoney
        JMP +notEnoughCash        
       
              +definitelyEnoughMoney:
           ChangeTileAtCollision #34, #00
           SubtractValue #8, myScore, #5, #$01
           UpdateHudElement #7
           LDA myAmmo_10    
           CMP #9
           BCS +
           AddValue #2, myAmmo, #10, #$01            
               +        
           UpdateHudElement #1
              +notEnoughCash:

So far I've changed it around various ways and I can never get it to work "together" as in it will either just add 10 to myAmmo and not subtract the 50 from myScore, or it'll subtract the 50 from myScore and not add 10 to myAmmo. Then sometimes it won't update the HUD until I have exited that particular screen. Any help is appreciated.

 

[dale_coop]

If you want to update multiple HUD elements at the same time, follow that topic:

Update multiple HUD elements simultaneously [4.5.9]

One of the somewhat frustrating limitations of NESmaker is that you can only update one HUD element at a time (if you're using the normal tile based HUD) Indeed, if you have multiple UpdateHudElement calls in succession in the code, only the last one is taken into account >_< For example, when...

www.nesmakers.com

 

[NightMusic]

coming soon to a tutorial near you! @tbizzle

 

[NightMusic]

If you want to update multiple HUD elements at the same time, follow that topic:

Update multiple HUD elements simultaneously [4.5.9]

One of the somewhat frustrating limitations of NESmaker is that you can only update one HUD element at a time (if you're using the normal tile based HUD) Indeed, if you have multiple UpdateHudElement calls in succession in the code, only the last one is taken into account >_< For example, when...

www.nesmakers.com

Thank you @dale_coop ! this is coming as a primer right before the shop tile tutorial!

 

[NightMusic]

@tbizzle should I make an entirely new forum topic in community tutorials on how to create Zelda shop screens or should I just make a video and link it here? Your topic, your call. Hugs.

 

[tbizzle]

@NightMusic , you can do both! The more the merrier!

 

[NightMusic]

@NightMusic , you can do both! The more the merrier!

Tutorial Tuesday!

(4.5.9) Creating a Shop Screen with Tiles ("Zelda" type Shop Screen)

Hello! The following is how I create Shops in my games: 1st Follow the following tutorial : https://www.nesmakers.com/index.php?threads/update-multiple-hud-elements-simultaneously-4-5-9.8360/ 2nd : Have user screen bytes AND tiles 14 and 15 enabled following this video...

www.nesmakers.com