ZSNES on Intel Mac, further progress

hector · Post by **hector** » Fri Jun 09, 2006 1:09 am

In earlier attempts the executable would crash with an illegal instruction exception because in dyld_stub a SSE instruction raises this exception as the stack is not aligned to 16 bytes. Using the new -mstackrealign parameter to gcc, this particular problem is mitigated.

I will probably do more work on this later, but for now the familiar zsnes window is drawn, but with the text pointers pointing in the wrong places, so that the text is not readable. Also, the message "Code Alignment Failure : Data Alignment Failure : 18" is printed.

Here's a screenshot of the progress so far:

Post by **grinvader** » Fri Jun 09, 2006 3:08 am

The code alignment warning come from an internal check and means the data isn't properly aligned, of course what you experience is directly linked to that.

If you find a way to rewrite the ALIGN* macros in source it so that it respects the alignment tests, you may just find a fix for that. Of course, I have no idea how to pull that.

Btw, if you want to try and realign the data itself (not recommended) the 5x5 font data (which is at fault in your pic) is found at the end of gui/gui.asm. Good luck ! :)

hector · Post by **hector** » Fri Jun 09, 2006 11:32 pm

This result was reached by modifying gui.asm, moving the lines

%include "gui/guimisc.inc"
%include "gui/guimouse.inc"
%include "gui/guiwindp.inc"
%include "gui/guikeys.inc"
%include "gui/guicheat.inc"
%include "gui/guicombo.inc"
%include "gui/guiload.inc"

onto line 777, just before the DrawSnow routine. What is confusing me is why this works. I could really use a hand here.

Mike · Post by **Mike** » Sat Jun 10, 2006 4:08 am

grinvader wrote:The code alignment warning come from an internal check and means the data isn't properly aligned, of course what you experience is directly linked to that.

If you find a way to rewrite the ALIGN* macros in source it so that it respects the alignment tests, you may just find a fix for that. Of course, I have no idea how to pull that.

Btw, if you want to try and realign the data itself (not recommended) the 5x5 font data (which is at fault in your pic) is found at the end of gui/gui.asm. Good luck !

Grinvader is so cool.. haha

snkcube · Post by **snkcube** » Sat Jun 10, 2006 5:15 am

hector wrote:

This result was reached by modifying gui.asm, moving the lines

%include "gui/guimisc.inc"
%include "gui/guimouse.inc"
%include "gui/guiwindp.inc"
%include "gui/guikeys.inc"
%include "gui/guicheat.inc"
%include "gui/guicombo.inc"
%include "gui/guiload.inc"

onto line 777, just before the DrawSnow routine. What is confusing me is why this works. I could really use a hand here.

Bravo! Nice work.

hector · Post by **hector** » Sat Jun 10, 2006 11:17 am

GUI works perfectly now. Emulation doesn't

hector · Post by **hector** » Sat Jun 10, 2006 4:40 pm

Or perhaps I should say, Super FX doesn't.

Ichinisan · Post by **Ichinisan** » Sat Jun 10, 2006 5:05 pm

SCHWEET!

An Intel-based Mac Mini WILL BE MINE.

Deathlike2 · Post by **Deathlike2** » Sat Jun 10, 2006 6:15 pm

There's a chance the SuperFX rom is interleaved.. use NSRT to check it out.

PHoNyMiKe · Post by **PHoNyMiKe** » Sat Jun 10, 2006 6:19 pm

Deathlike2 wrote:There's a chance the SuperFX rom is interleaved.. use NSRT to check it out.

I swear you're nach posting under a different name. to bad nsrt doesn't hold you while you sleep at night.

hector · Post by **hector** » Sat Jun 10, 2006 6:23 pm

Deathlike2 wrote:There's a chance the SuperFX rom is interleaved.. use NSRT to check it out.

The rom works under Windows.

adventure_of_link · Post by **adventure_of_link** » Sat Jun 10, 2006 6:41 pm

Ichinisan wrote:SCHWEET!

An Intel-based Mac Mini WILL BE MINE.

Intel-based Macbook for me.

ftw.

Ichinisan · Post by **Ichinisan** » Sat Jun 10, 2006 6:58 pm

I hesitate to get a laptop due to the single-button mouse input thingie doohickey mabobber.

adventure_of_link · Post by **adventure_of_link** » Sat Jun 10, 2006 7:08 pm

you know you CAN buy a mouse right ?

Ichinisan · Post by **Ichinisan** » Sat Jun 10, 2006 7:39 pm

adventure_of_link wrote:you know you CAN buy a mouse right ?

You do know that would defeat the purpost of a laptop computer, right?

DataPath · Post by **DataPath** » Sun Jun 11, 2006 1:56 am

I don't get it - how does a mouse interfere with the spermcount-lowering capabilities of a laptop?

BRPXQZME · Post by **BRPXQZME** » Sun Jun 11, 2006 5:49 am

Oh, just turn on the durn option and use two fingers to right click already.

hector: RAWK. This saves me a lot of guesswork, especially since I have the assembly/gcc-flag hacking skills comparable to those of a fish

(P.S., the command "svn diff > blah.patch" helps everyone see exactly what modifications you've made. I loved it since that first morning I discovered it, and I think you will, too.)

Ichinisan · Post by **Ichinisan** » Sun Jun 11, 2006 5:53 am

There is an option? Joy!

/me likes options.

BRPXQZME · Post by **BRPXQZME** » Sun Jun 11, 2006 5:58 am

This topic might be relevant to your interests, yes.

(In the meantime, I've also been making efforts on the MAME end... I'm going to finally make up for all these years I've been bad at 2D fighters, I swear!)

CZroe · Post by **CZroe** » Sun Jun 11, 2006 6:41 am

Ichinisan wrote:
adventure_of_link wrote:you know you CAN buy a mouse right ?
You do know that would defeat the purpost of a laptop computer, right?

It's "notebook" now. Or haven't you heard? the word "laptop" does not appear once in the MacBook's manual.

BRPXQZME wrote:This topic might be relevant to your interests, yes.

(In the meantime, I've also been making efforts on the MAME end... I'm going to finally make up for all these years I've been bad at 2D fighters, I swear!)

I told Ichinisan about that the day the new MacBooks were released. Unfortunately, it's only the standard MacBook until they update the Pro models again. The main reason I wan't a MacBook at all is for the X1600 graphics *on the go* so a regular MacBook just wouldn't cut it.

BRPXQZME · Post by **BRPXQZME** » Sun Jun 11, 2006 6:53 am

Don't think I'll ever make the rookie mistake of keeping a "portable computer" or a "notebook" directly on my lap for longer than a few minutes ever again. The Pentium M-based ones are better, but after I got a nice burn scar from this Pentium 4, no never again!

To tell the truth, if/when I get a MacBook Pro, I'll be waiting for the 64-bit processors. Not only that, but I'd get a 17" one, only for the better battery and the "holy crap that screen is way too big" factor. Okay X1600 is nice, but obviously I'm perfectly content with my integrated graphics for now.

hector · Post by **hector** » Sun Jun 11, 2006 9:34 am

Super FX now working.

Now working on Mario Kart.

If anyone can provide pointers to where I can find hosting I can share the patch and the executable with you guys.

Regarding Macbooks, the one I have has no problems, the trackpad does not disadvantage me at all, the screen is excellent, all in all a very good investment, especially for coding.

hector · Post by **hector** » Sun Jun 11, 2006 3:59 pm

And now Mario Kart works too.

In both cases the problem was caused by some fault in nasm on OSX, which I can't really articulate since I don't really understand the reasons myself. By moving around the EXTSYM lines in two files the bug appears to have been worked around. Yeah, frustrating I know. Maybe my next job should be to fix the assembler?

Nach, pagefault, are you ready for me to submit patches?

bztunk · Post by **bztunk** » Sun Jun 11, 2006 4:14 pm

What i want to know is, how did you find out what line to change where?

Blatant luck?

Deathlike2 · Post by **Deathlike2** » Sun Jun 11, 2006 4:21 pm

It's just possible that the NASM compiler for the Mac is just crappy at the moment. I remember hearing about some registers that can't be used for "some stupid reason" when it works just fine on the Linux/Windows version...