How Dma Debug works?

[sandruzzo]

Hi,

Can someone explain to me how enable visual dma usage? I would like to see how much dma i'm using and how improve it.

Thanks

[Toni Wilen]

In debugger:
v -1 : enable only, no visual mode.
v -2 : enable + visual mode
v -3 : enable + visual mode + doubled horizontal pixels

Note that currently mode can't be changed after it has been enabled.

After it has been enabled (visual or not), v <vpos> <hpos> shows detailed scanline DMA/CPU usage.

[sandruzzo]

Originally Posted by Toni Wilen

In debugger:
v -1 : enable only, no visual mode.
v -2 : enable + visual mode
v -3 : enable + visual mode + doubled horizontal pixels

Note that currently mode can't be changed after it has been enabled.

After it has been enabled (visual or not), v <vpos> <hpos> shows detailed scanline DMA/CPU usage.

Thanks tony. With that, i'll be able to see how mamy dma cycle my screen will take? Do you remember the help you gave me about copper?

How I can read alla that colors on screen? What does they means?

[Toni Wilen]

Originally Posted by sandruzzo

Thanks tony. With that, i'll be able to see how mamy dma cycle my screen will take? Do you remember the help you gave me about copper?

Yes but you probably need to use console version (v vpos hpos) to see all details.

btw, remember to enable copper debugger first (od). Then check copper list (o-command), use it to find line you need DMA details, then use v-command to see exact details.

How I can read alla that colors on screen? What does they means?

yellow = copper
green = blitter
dark green = blitter line
bright green = blitter fill
blue = bitplane
cpu = gray
audio = red
sprite = white
disk = purple

Vertical line on the left side: CPU interrupt level.