2 replies to this topic

[Dragnerok X]

...I need some help.

Recently after finishing an atari game/program in Bb a few weeks ago, I decided to take the "plunge" into asm, mostly for more programming power. I've been reading through many different tutorials and have started to create a horendously simple demo with dasm. What I am wondering, is, why won't it compile?

Here's the source code for it.

 kernel.zip   417bytes   60 downloads

...and in case your wondering, all it's supposed to be is a simple, single-color, screen.

Edited by Dragnerok X, Thu Nov 9, 2006 2:33 PM.

[Thomas Jentzsch]

Two errors that prevent compiling:
1. VBLANK is a reserved constant for a TIA register, so you cannot use it for a label.
2. Reset is undefined. You have to define that label before CLEAN_START.

One more error:
You enable VBLANK, but you don't disable it again. Therefore the screen will be black. Disable VBLANK before PICTURE.

BTW: It is not common to use UPPERCASE for labels. UPPERCASE is reserved for constants. Use MixedCase for labels instead.

[Dragnerok X]

Thomas Jentzsch, on Thu Nov 9, 2006 1:51 PM, said:

Two errors that prevent compiling:
1. VBLANK is a reserved constant for a TIA register, so you cannot use it for a label.
2. Reset is undefined. You have to define that label before CLEAN_START.

One more error:
You enable VBLANK, but you don't disable it again. Therefore the screen will be black. Disable VBLANK before PICTURE.

BTW: It is not common to use UPPERCASE for labels. UPPERCASE is reserved for constants. Use MixedCase for labels instead.

Well, it worked. Not too exciting, but hey, what do you expect!



...now time to do something more interesting with this, like add a few sprites or make the background multi-colored.