WinUAE 2.6.0 / Shapeshifter 3.10 / FPU issue

[Gilloo]

Hi All,
I don't know if is the good place to talk about this... but why not...

I got WinUAE 2.6.0. and shapeshifter 3.10
WinUAE is configured with 68030 + 68882, 32Mb of Z3 ram

Inside mac emulator (MacOS 7.5.3), SysEnvirons finds the 68030 but not the FPU.
Is it normal ?

[Gilloo]

A workaround: SoftwareFPU 3.07
http://www.applefritter.com/node/12028

Now GestAlt gives fpu => 1, FPUE => something, and all programs claiming a fpu are working.

WinUAE + ShapeShifter + i5 = Mac Quadra 900 x 12 !
(Really a good job Toni )

[Toni Wilen]

I don't like workarounds, is Shapeshifter supposed to support 6888x FPU or not? I assume it does and there is problem somewhere.. Does 2.6.1 work? What if you untick "FPU unimplemented emu" FPU option? (only in 2.6.1 and later, 6888x also have sort of unimplemented instructions, 68040+ added some new FPU instruction variants)

(But because I am lazy, I need fully installed hdf for testing. Any other option = no deal )

[FreakyDan]

As a note: If I recall correctly the last time I "experimented" with Shapeshifter(2 years ago). I was only successful to get Shapeshifter to recognize the FPU if I had 68040 selected in WinUAE settings.

[Gilloo]

Hi Toni,
Done tests with 2.6.1 with various 1MB roms ( LC ; Quadra 900 ; Quadra 650 ) and it is the same: the processor (gestalt proc 3=68020 4=68030 5=68040) is well detected, but never the fpu (gestalt fpu = 0)

http://shapeshifter.cebix.net/

So SoftwareFPU is a good help for the moment
SoftwareFPU emulates fpu = 1 68881

[Toni Wilen]

I said: no ready-made hdf = nothing happens. Sorry.

[zipper]

Did a quick check with 2.5.1 and set as 030/882 combo on ss 3.11 - no FPU found. A quick glance on SS docs didn't tell anything about FPU. Must check with 040 settings. OK, with 040 FPU is found.

[Toni Wilen]

I'd still like to have test image because Amix had quite weird FPU detection that wasn't emulated correctly and it may not be the only one.

[mark_k]

I'm putting together a bootable HDF with ShapeShifter & System 7.5.3 hardfile. What program should I put on the hardfile for showing which CPU/FPU the Mac thinks it has?

[Toni Wilen]

Originally Posted by mark_k

I'm putting together a bootable HDF with ShapeShifter & System 7.5.3 hardfile. What program should I put on the hardfile for showing which CPU/FPU the Mac thinks it has?

It may not be needed, it should be easy to debug when/if the OS attempts to use FPU instructions. (Assuming it detects it early in boot phase)

[Gilloo]

Originally Posted by mark_k

I'm putting together a bootable HDF with ShapeShifter & System 7.5.3 hardfile. What program should I put on the hardfile for showing which CPU/FPU the Mac thinks it has?

Something using gestalt with 'proc' and 'fpu ' ids or at least SysEnvirons function.


Or use this little application Gestalt, and what the 'proc' and 'fpu ' ids return.
Gestalt.Appl 2.7.10 (25 Oct 1998)
http://gestlab.free.fr/gestlab/glab_us.html

[mark_k]

Okay, so my test HDF is done. I tested with different CPU and FPU settings (with JIT enabled every time).

68020/JIT/68881: 68881 detected
68020/JIT/68882: No FPU detected!
68030/JIT/68881: 68881 detected
68030/JIT/68882: No FPU detected!
68040/JIT/NoFPU: No FPU detected (that's correct)
68040/JIT: 040 FPU detected

So a workaround would be to use a config with 68881 FPU, if you have Mac-side software which can use it.

[Toni Wilen]

I can't see any kind of FPU detection-like instructions when 6888x FPU is set and if 68040 FPU is set, it still does not attempt to detect it, it just uses it normally..

My guess is that ShapeShifter does the detection (using sysbase fields?) and passes the information to Mac side.

[mark_k]

I did wonder whether other factors can affect it. For example the Mac ROM version, or whether System 7.5.3 was installed differently, e.g. for any Macintosh, not just for the current machine (which is the default).

Can someone test using a different Mac emulator like Fusion or Emplant? And on a real 68030/68882 Amiga?

[amilo3438]

Originally Posted by mark_k

I did wonder whether other factors can affect it. For example the Mac ROM version, or whether System 7.5.3 was installed differently, e.g. for any Macintosh, not just for the current machine (which is the default).

Maybe this might be helpful ...

Amiga side: success/failure list ... http://gowdy.web.cern.ch/gowdy/Amiga.../arompoll.html

Note: The above is just one part of KLAATU's ShapeShifter FAQ ... http://gowdy.web.cern.ch/gowdy/Amiga...ions/main.html

EDIT: Also an old manual ... http://gowdy.web.cern.ch/gowdy/Amiga...ions/main.html

Also found this: http://eab.abime.net/712359-post53.html inside of this thread:http://eab.abime.net/support-apps/48...emulation.html and this ... http://main.system7today.com/gaming_fv.html

[amilo3438]

Little out of topic ...

Have found one video where ShapeShifter is running on real A4000, 40mhz 68040, 128mb Ram, PicassoIV ... a game Wolfenstein 3D for Mac without any gfx problem ...

[ Show youtube player ]

... now cant quite recall, was there in past a some gfx problem with WinUAE running ShapeShifter on UAEGfx Picasso96 and game/demo Wolfenstein 3D or not ?! ... or it was maybe some other game like Marathon etc. ?!

Because as from yesterday we have a new WinUAE2700b4 that now also emulates a PicassoIV gfx, so maybe it will be good if someone can check is there a such problem still exist ?! ... http://eab.abime.net/902679-post88.html

ps
Cause I am a little lazy to do it now all from beginning ... as lost my WinUAE ShapeShifter HDF setup when my old P3 desktop died together with HD.

[Gilloo]

Got this with WinUAE 2.6.0 / Shapeshifter 3.11 and a Quadra 900 ROM 1MB
68020/JIT/68881: 68881 detected
68020/JIT/68882: No FPU detected!
68030/JIT/68881: 68881 detected
68030/JIT/68882: No FPU detected!
68040/JIT/NoFPU: No FPU detected
68040/JIT: 040 : No FPU detected

=> 68882 and 68040 builtin FPU not detected, perhaps the mac ROM is not able to do the job

[mark_k]

That's strange. I tested using a 512KB ROM image (so presumably older than your one) and the 68040 FPU was detected.