Video9000: programmatically activate superimpose

[pvmm]

Video9000 graphics cartridge does superimpose by itself if you use

OUT (0x6f), 0x18

to make it opaque and

OUT (0x6f), 0x10

to make it transparent. How about using this setting to superimpose automatically, instead of trying to detect it by used registers? This is how OpenMSX does it if you use the Video9000 extension.

[ppeccin]

Hi!

Can you link some specs please?

Regards, Paulo

On Sat, Mar 11, 2023 at 7:24 PM Pedro de Medeiros @.***> wrote:

Video9000 graphics cartridge does superimpose by itself if you use

OUT (0x6f), 0x18

to make it opaque and

OUT (0x6f), 0x10

to make it transparent. How about using this setting to superimpose automatically, instead of trying to detect it by used registers?

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[pvmm]

Sure. It's on chapter 5 of the Video9000 manual: http://www.msxarchive.nl/pub/msx/mirrors/msx2.com/kiwi/hardware/pdf/Sunrise/v9manual.pdf

[ppeccin]

Thanks!

I'll have to check that, but as I remender I implemented those ports. Isn't it working? Can you point me to some software that tries to activate the modes in thi way but fails?

Paulo

On Mon, Mar 13, 2023 at 6:01 PM Pedro de Medeiros @.***> wrote:

Sure. It's on chapter 5 of the Video9000 manual: http://www.msxarchive.nl/pub/msx/mirrors/msx2.com/kiwi/hardware/pdf/Sunrise/v9manual.pdf

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[pvmm]

I fixed it on my side.