DPC+ NUSIZ0

[satyrsfaction]

OK, I'm trying to make missile 0 eight pixels wide in DPC+. I use NUSIZ0 = $30, but it doesn't do anything. The missile is still 1 pixel wide. what am I missing?

[CapitanClassic]

Do you only have one copy, or multiple copies of P0?

 

 

[satyrsfaction]

41 minutes ago, CapitanClassic said:

Do you only have one copy, or multiple copies of P0?

 

 

just one copy...I just want missile0 to be 8 x 8 pixels

[+Random Terrain]

It seems to be working here, but it was compiled a long time ago:

 

https://www.randomterrain.com/atari-2600-memories-batari-basic-commands.html#ex_dpc_13_objects

 

Try compiling it and see if you can change the size of the missiles by selecting them, holding down the fire button, then moving the joystick left or right.

[satyrsfaction]

10 minutes ago, Random Terrain said:

It seems to be working here, but it was compiled a long time ago:

 

https://www.randomterrain.com/atari-2600-memories-batari-basic-commands.html#ex_dpc_13_objects

 

Try compiling it and see if you can change the size of the missiles by selecting them, holding down the fire button, then moving the joystick left or right.

yes, that program works fine, though it's a bit confusing to look at for me. Is there something else I need to set for this to work? I mean, if you were writing a game that did nothing but set the missile0 width to 8, what would it look like?

[satyrsfaction]

33 minutes ago, Random Terrain said:

It seems to be working here, but it was compiled a long time ago:

 

https://www.randomterrain.com/atari-2600-memories-batari-basic-commands.html#ex_dpc_13_objects

 

Try compiling it and see if you can change the size of the missiles by selecting them, holding down the fire button, then moving the joystick left or right.

Well, I got it to work by moving the statement to inside the main loop...I don't know what that made a difference.

[+Random Terrain]

16 minutes ago, satyrsfaction said:

Well, I got it to work by moving the statement to inside the main loop...I don't know what that made a difference.

 

Yep, the bB page tells you when things need to be in the main loop:

 

https://www.randomterrain.com/atari-2600-memories-batari-basic-commands.html#nusiz

 

You might also want to look at this section:

 

https://www.randomterrain.com/atari-2600-memories-batari-basic-commands.html#ephvarreg

[TwentySixHundred]

Yeah it needs to be in the mainloop with DPC+. The only reason i could think is the value is stored as a temp variable that gets obliterated after the drawscreen function is called (unlike most TIA registers)

[+Karl G]

It gets wiped out by the score routine specifically, which sets both player objects to 3 copies close in order to do a 6-digit score. 

[satyrsfaction]

Thank you everyone.