mint060sp (motorola 060isp/fpsp)

[agranlund]

The Motorola 060 support package emulates the missing Integer as well as Fpu instructions, thus:

• Removed complaints when using on LC/EC and have it install the integer part.
• Renamed the executable from fpu060sp -> 060sp for the same reason.

In addition:

• Fixed broken 68060 detection.
• Fixed a couple of callout functions.

Should this executable be built and distributed with the 060 Freemint builds?
CT60 TOS has the 060 isp/fpsp built in already but for other hardware running EmuTos this is handy.

Preferably, this should come with EmuTOS builds rather than Freemint since it's equally useful when running EmuTOS only.

[th-otto]

* Removed complaints when using on LC/EC and have it install the integer part.

I don't think this is the correct thing to do. The fpsp only emulates the instructions that were removed from 060 (like fsin etc), but not the ones that are still there. To support 060 without FPU, you would have to emulate much more.

[mikrosk]

Are you sure @th-otto that you have interpreted this patch correctly? My understanding is that on LC/EC (no FPU) the FPSP wouldn't install at all, therefore omitting the important stuff as emulation of missing integer instruction which causes crash for some apps.

This patches enables emulation of integer instructions and keeps the rest as it was, i.e. it's clearly an improvement over the previous state (where both integer and FPU instructions were causing crashes).

Should this executable be built and distributed with the 060 Freemint builds?

I think it should be built into the kernel but see below.

Preferably, this should come with EmuTOS builds rather than Freemint since it's equally useful when running EmuTOS only.

I tend to agree, it should not even "come with" but be "built in" EmuTOS, same as the PMMU initialisation for 040+.

But as a temporary workaround, if this patch gets merged, I have nothing against adding it to our 060 builds.

[agranlund]

The fpsp only emulates the instructions that were removed from 060 (like fsin etc)

Yep but the isp part of that package is valid for EC/LC to prevent programs from crashing on the missing Integer instructions.

[mikrosk]

Merged, thanks!