Re: [hatari-devel] DSP for Previous

[Laurent Sallafranque <laurent.sallafranque@xxxxxxx>]

Hi,

I did a lot of integeration of the DSP part into Hatari.

Actually, the DSP is quite completly integrated for the Falcon (there are a few known things that should be done, but it works quite well).
There's no DMA to DSP into the Falcon, so this is not emulated.
If the computer has 2 or 3 external RAM banks, this may need to be reworked too, so may be the memory mapping.

The instructions pipeline is not perfect with some instructions that use Rn registers, but it works anyway in an emulator.
This makes some problems when someone use the emulator to develop something for the real hardware.

Don't hesitate to ask for more informations if needed.

As an example, Doug Little has ported Doom and is currently porting Quake 2 on Falcon by only developping on hatari.
He tests his code on his real falcon sometimes, but this shows that the emulation level of the DSP is quite high.

Regards,
Laurent



Le 02/06/2015 18:21, Miro Kropáček a écrit :

On Tue, Jun 2, 2015 at 6:07 PM, Andreas Grabher <andreas.grabher@xxxxxxxxxxxx> wrote:

Do you think it can be interfaced with the NeXT stuff?

I'll let the technical questions to be answered by the Hatari team but it definitely can by interfaced. Some years ago I took its DSP sources and integrated it into my DSP simulator: https://github.com/mikrosk/cute56 ... easy peasy.

The level of emulation precision is excellent (even for such aged source!), the main source of problems in Hatari comes from CPU <-> DSP sync.

--

MiKRO / Mystic Bytes
http://mikro.atari.org