problem with VESA mode 112h

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zhak

Joined: 12 Apr 2005
Posts: 501
Location: Belarus

zhak 28 Mar 2006, 21:17

Hi people. I need help. I tried hard to display a .BMP by copying it to video memory. I use VESA Mode 112h. But when I move window by using function 4F05h of INT 10h then next portion of the image is shifted to the right. And I can't align it on the screen.
Why is it happen so? Thanks.

28 Mar 2006, 21:17

zhak

Joined: 12 Apr 2005
Posts: 501
Location: Belarus

zhak 28 Mar 2006, 22:58

At last!!! I did it!
My mistake was that I didn't check granularity and window size.
VESA reports WinGranularity = 10000h bytes; BytesPerScanLine = 780h bytes, so I can write 34 lines in one window. It will occupy 0FF00h bytes.
I have 100h more bytes that i had to count. That is why the image was shifted and colors were mixed!!

28 Mar 2006, 22:58

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