Re: [hatari-devel] macOS : FPU using EmuTOS

[Eero Tamminen <oak@xxxxxxxxxxxxxx>]

Hi,

On 12/4/20 9:35 AM, Francois LE COAT wrote:
> I made a video demonstration using Hatari 2.3.0 with a Falcon030
> at 32MHz / TOS4.04:
>
>      <https://www.youtube.com/watch?v=SLm5ayChv9Q>
>
> It's the replay of the GEM sequence "EUREKA.REC" with my software,
> with the "RECORD.ACC" accessory. The issue is I used TOS4.04, but
> I wanted to use EmuTOS 1.0 instead, because I know EmuTOS works with
> appl_tplay() and appl_trecord() system calls. But when I switched
> Hatari to boot on EmuTOS 1.0, the FPU (68882) was disabled...
>
>      <http://eureka.atari.org/Hatari230.png>
>
> So, when I start my Eureka 2.12 software, that makes usage of the FPU,
> there's a floating point error (LineF).
>
> Is it a known issue ? Why is the FPU disabled when booting EmuTOS ?

Real Falcon machines don't have FPU, so Hatari
doesn't enable it by default for Falcon either.

If you want to use FPU, enable it separately,
e.g. from command line:
--tos tos404.img --machine falcon --fpu 68882


	- Eero