Re: changes to support MacMiNT

[Julian F. Reschke <julian@GOEDEL.UNI-MUENSTER.DE>]

> 
> Hi MiNT people -
>   I have ported MiNT 0.95 to the Macintosh, and I'm starting to port version
> 1.04.  For my 0.95 port I basically hacked around until it worked.  For
> the 1.04 port I would like to be a little more systematic.  It turns out that
> the major changes to MiNT have to do with low memory addresses.  MiNT wants
> to find certain system globals in low memory but the Mac stores its own
> stuff there, so the the Mac version of MiNT needs to look somewhere else for
> these values.  What I would like to suggest, so that my port will be cleaner,
> is that access to low memory globals not be hard coded.  I have started
> two files: one to be included in assembler files and one to be included by
> C files.  The following is what I have in 'locore.i', the assembler include:
> 
> %ifndef MAC
> %define LC_TERM ($408).w
> %define LC_FRAME ($59e).w
> %define LC_FLOPLCK ($43e).w
> 
> %define GEMDOS 1
> %define AES 2
> %define BIOS 13
> %define XBIOS 14
> %else
> 	XDEF	_mac_term
> 	XDEF	_mac_frame
> 	XDEF	_mac_floplck
> 
> %define LC_TERM _mac_term
> %define LC_FRAME _mac_frame
> %define LC_FLOPLCK _mac_floplck
> 
> %define GEMDOS 1
> %define AES 15
> %define BIOS 2
> %define XBIOS 3
> %endif
> 
> The other header would do the same sort of thing for C files. This would make
> it easier to port and not much more complicated.
> 
> What do you think?
> 
> Brad
> 

While I'm not sure that Atari and Eric *want* MiNT to run on the Mac -- 
I guess that the changes would make the code a bit better to read :-)

-- 
-----------------------------------------------------------------------------
Julian F. Reschke, Hensenstr. 142, D-W4400 Muenster (from July, 1st: D-48161)
         eMail: julian@math.uni-muenster.de, jr@ms.maus.de
_____________________________________________________________________________