Re: [hatari-devel] TOS v4 / TT-RAM issue with floppy images

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On Montag, 27. November 2017 10:35:24 CET Nicolas Pomarède wrote:
> maybe an extra
> program would be needed at boot to intercept TOS accesses and ensure FDC
> data are transferred between RAM and TT RAM.

It depends on where the access is coming from. You could catch calls like 
Floprd/Flopwr (maybe that can already done by Hatari, without the need of an 
extra program), but if the hardware is accessed directly, it will be too late. 
The bios of TOS 3.06 at least will call the internal routines directly, 
without going through the BIOS trap, so that might be difficult. For this you 
have to hook also at least the hdv_ system vectors. Another difficulty might be 
if some XHDI-capable driver is used, don't know how they behave if you are 
trying to access a floppy through this.

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