Bug in hmmm x coordinate

[Ray-Hoo]

When I copy a part of the screen with the hmmm command and put in on a certain target location the location is off by 1 pixel. When I move it to the right with 1 pixel, it moves with 2 pixels. So it looks like there is a bug in the X coordinate.

[ericb59]

Hello,

What is the screen mode you are using ?

[ericb59]

If you are using Screen mode 5 or 7 , this is normal. It's a hardware limitation.

[Ray-Hoo]

Yes, I am using screen 5. Could you please explain a bit more about this hardware limitation? As I did not experience this when using Turbo Pascal on the MSX (or I have not noticed it).

[ericb59]

Hi,

You can check in the V9938 manual : http://map.grauw.nl/resources/video/yamaha_v9938.pdf
Page 62
That in G4 and G6 mode (Screen mode 5 and 7) the lower bit of SX and DX are lost.
So coordinates must be even numbers.

[ericb59]

Hi, If you have a GitHub account and want to be included in the Beta test of Fusion-C 1.3, let me know your GitHub Account. See you Eric Le lun. 9 nov. 2020 à 19:28, Raymond <notifications@github.com> a écrit :

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