Better toggle all relevant bits in VGA crt register.
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@ -830,7 +830,7 @@ BYTE VGA_ioport_in( WORD port )
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case 0x3da:
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/* since we don't (yet?) serve DOS VM requests while VGA_Poll is running,
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we need to fake the occurrence of the vertical refresh */
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ret=vga_refresh?0x00:0x08;
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ret=vga_refresh?0x00:0x0b; /* toggle video RAM and lightpen and VGA refresh bits ! */
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if (vga_mode_initialized)
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vga_refresh=0;
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else
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