Re: [hatari-devel] Videl Emu and TimerB

[Nicolas Pomarède <npomarede@xxxxxxxxxxxx>]

On 07/03/2012 23:32, Laurent Sallafranque wrote:
> Thanks Nicolas,
>
> The first problem actually is that many code in mfp.c calls video_...
> functions
> like video_get_position, video_getTimerBPos, ...
>
> And as I don't want to call anything from video (which is no more
> initialized), it goes wrong.
>
> Do you thing we should encapsulate every mfp.c functions with something
> like :
> if (machine == falcon)
> do_ videl (or do_nothing)
> else
> call video_...

I don't think the falcon need many code in mfp.c for timer B

In MFP_TimerBData_ReadByte, you should just do 1 line for falcon case in 
mfp.c :

        IoMem[0xfffa21] = MFP_TB_MAINCOUNTER;

All the rest is cycle precise code that is useful only for border 
removal on STF/STE, it would not work on falcon.

And MFP_TimerB_EventCount_Interrupt should remain unchanged ; just call 
it from videl.c with sthg like that (in the HBL handler for now) :

        if ( ( nHBL >= nStartHBL ) && ( nHBL < nEndHBL + BlankLines ) )
	{
		if (MFP_TBCR == 0x08)
			MFP_TimerB_EventCount_Interrupt();
	}

That's all you will need fot Falcon's timer B.


> What could explain that the mouse doesn't work anymore ?

hundreds of things, but I have no idea :)


Nicolas