Re: [hatari-devel] Blitter emulation corner case

["Markus Fröschle" <markus@xxxxxxx>]

>On 10 May 2017 at 20:45, Christian Zietz wrote:
>> 
>> PS: I'm still interested if the COMBO chip or the Falcon's Blitter work
>> the same here.
>
>OK, attached is a ZIP with the following:
>.. modified C source to write info to file instead of screen
>.. resulting binary
>.. FALCON1.TXT->FALCON5.TXT: these are results of 5 different runs
>  of the modified binary under TOS 4.04 on my Falcon.  All the sets
>  of results seem to be different!
>  Note: In case you care, FALCON1.TXT/FALCON4.TXT are the first runs
>  immediately after a cold boot.
>.. ST1.TXT->ST2.TXT: results from 2 runs on a 1040STe.  These seem
>  to be consistent.
>
>Roger


Hi everybody,

just subscribed to this list.

Before anyone get's desparate: better make sure you haven't been fooled by the Falcon's 030 data cache here (at least I didn't see any code to invalidate the cache).
The blitter is a DMA device, so without a cache invalidate, you probably won't see the new values the blitter just copied (or only more or less randomly).

Cheers,
Markus