[A83] Re: Special ram area

To: <assembly-83@lists.ticalc.org>
Subject: [A83] Re: Special ram area
From: "Ronald Teune" <rtwolf@gmx.net>
Date: Fri, 2 Nov 2001 20:10:15 +0100
Reply-To: assembly-83@lists.ticalc.org

>AFAIK,
>it puts the first app at page 15 (15 and 14 if 2 page app), the 2nd at 14,
>3rd at 13 etc...

Checking... Yes, indeed, the first is at 15 and the 2nd at 14. Why don't
automated GarbageCollects before receiving an app clear up 'app' pages? I
had >32768 bytes free, and two apps, but there was an 'error memory'. Or is
this solved in OS1.10+? That would be a reason to step-over.

>>
>> I wonder if the calculator keeps a pointer that points to the next free
>> location to write to flash.  By screwing with these pointers, perhaps it
>> would be possible to write programs into the unused flash space which the
>> app greedily takes up if it is less than 16k.  Then after installing this
>> program into the flash app, change the pointers back.  Perhaps this could
>> be a method for installing a font set or maybe TI just does an iterative
>> search for the next available place every time you attempt to archive
>> something.
>> Brandon Sterner
>>
>> On Fri, 2 Nov 2001, Peter-Martijn Kuipers wrote:
>>
>> >
>> > > Enough room for fonts...
>> > > Well, I actually *have* to do it, because I want to use hooks. But I
want to
>> > > have external fonts, which can't be made applications. Hehehe, yes it
is
>> > > possible, but it will be of no use then...
>> >
>> > They cant' be made app's, but maybe they can be made into your app....
>> > Explanation:
>> > What I mean is that you could have a font description like this:
>> > .db "FONT" ; or anything that identifies this as a font, must be the
same for
>> >    ; all fonts
>> > .db "name" ; fixed_length name
>> > ...font data...
>> > .db "END_FONT" ; or whatever constant you want to identify the end...
>> >
>> > you could make a program or script that takes the font data, and put's
it into your app at the end, then sign it, ready to be put onto the calc...
>> > Another script/program might be able to remove specific fonts. an then
re-sign
>> > it.
>> >
>> > In your app, you'd need to put a label at the end, and let a routine
search for
>> > fonts from that label on...
>> > If the first thing after that label isn't the start_font constant,
there are
>> > no external fonts...
>> >
>> > Only problem with this is that you'd need to re-install the flash app
every
>> > time you add a new font.
>> > A good thing is that the user can use the "free" space in the app for
fonts,
>> > instead of letting it go to waste.
>> >
>> > --Peter-Martijn
>> >
>> >
>> >
>> > > --
>> > >     Ronald Teune @School
>> > >     http://www.zeekoe.cjb.net
>> > >     http://ti.zeekoe.cjb.net
>> > >     Anything that's good&useful is made of chocolats
>> > >
>> > > Sent through GMX FreeMail - http://www.gmx.net
>> > >
>> > >
>> >
>> >
>> >
>> >
>>
>>
>>
>
>
>