| BLTCONCheatSheet by The Deadliners [web] | ||||||||
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popularity : 54% |
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alltime top: #20229 |
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added on the 2022-07-16 23:28:00 by Soundy  |
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popularity helper
comments
thx !
Quite handy. Many thanks.
Well, that's going in the bookmarks.
Neat, thanks :)
This is great! It really helps visualize how the minterms actually work.
One minor thing: the 'Fill' preset is currently the same as 'Copy'. I'm guessing it should be $9ff rather than $9f0.
One minor thing: the 'Fill' preset is currently the same as 'Copy'. I'm guessing it should be $9ff rather than $9f0.
Thanks @gigabates for the feedback!
I've always used $9f0 for fill, but maybe I've been wrong all this time (I'm often wrong)? Let's check: Using $9ff for fill rather than $9f0 means you want to lit the 4 lower bits of the minterms. Just type 9ff in the BLTCON0 field in the tool and you'll see the following: DMA A and D used, and ALL conditions checked for the minterms. This means you will fill ALL pixels, uconditionally.
If you check the "Hardware Reference Manual", it states the following:
So basically, concerning BLTCON0, Copy and Fill are the same. At least that's my understanding. BLT1 makes the difference, check the tool, if you click "Fill", you'll see that BLTCON1 switches to $12.
I've always used $9f0 for fill, but maybe I've been wrong all this time (I'm often wrong)? Let's check: Using $9ff for fill rather than $9f0 means you want to lit the 4 lower bits of the minterms. Just type 9ff in the BLTCON0 field in the tool and you'll see the following: DMA A and D used, and ALL conditions checked for the minterms. This means you will fill ALL pixels, uconditionally.
If you check the "Hardware Reference Manual", it states the following:
Quote:
Use a standard copy blit (or any other blit, as area fills take place after all shifts, masks and logical combination of sources). Descending mode must be used. Set either the inclusive-fill-enable bit (FILL_OR, or bit 3) or the exclusive fill-enable bit (FILL_XOR, or bit 4) in BLTCON1.
So basically, concerning BLTCON0, Copy and Fill are the same. At least that's my understanding. BLT1 makes the difference, check the tool, if you click "Fill", you'll see that BLTCON1 switches to $12.
@Soundy yeah you're right. I wasn't looking at BLTCON1 and was just thinking fill in terms of setting all bits, not as in Fill Mode.
On another note, how would you feel about integrating this with the Amiga Assembly VS Code extension? I'm a contributor on the project and would be happy to look into this if you're open to it.
On another note, how would you feel about integrating this with the Amiga Assembly VS Code extension? I'm a contributor on the project and would be happy to look into this if you're open to it.
@gigabytes oh sure, I would be delighted to participate, the more we can help the community, the better. I might have other tools that could apply too. Just contact me at soundydeadliners at gmail.com
Super usefull!
Thanks for this helper
Thanks for this helper
Useful and I love the little visualisations.
submit changes
if this prod is a fake, some info is false or the download link is broken,
do not post about it in the comments, it will get lost.
instead, click here !
Also, consider looking at the other OCS tools you can find here:
Deadliners Tools Page
Have fun!