Re: A92: Questions (again)
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Re: A92: Questions (again)
fi97 Sacha KAERCHER wrote:
> > I'd be very please if someone could explain me, how the folder and
> > variable system of the TI-92 works (I'm looking forward to program a
>
> > menu to choose files)
> >
> > Another question: What's the difference between bhi and bgt
> (something
> > with signed and unsigned?)
> >
>
> Well, for the folder and variable system, it's quite simple.
> In TI's ram, you will find the VAT ( Variable Allocation Table), wich
> is made
> up of different memory blocks.
> First of all, there is the folder memory block, wich handle is $000B.
> This is
> a table wich contains all folders and theirs handle :
>
> the 4 first bytes are :
>
> offset :
> 00.w : maximum number of folders you can put in this table
> 02.w : number of folders in this table
>
> then:
> foldname , info , handle - foldname , info , handle ...
> 8 2 2 8 2 2 (bytes)
>
> As you can see, there is one handle per folder. This handle points too
> the
> folder's table. There is one table per folder, this table contains the
> vars of
> this folder. This is an exemple of a folder table :
>
> offset :
>
> 00.w max number of vars
> 02.w number of vars
> then
> varname , info , handle ...
> 8 2 2 (bytes)
>
> (info : locked or not)
>
> I hope that you understood.
>
> For bhi and bgt : bhi is to compare signed registers, and bgt for
> unsigned.
>
> I hope i'm right, Sacha
Thanks very much! I think this will help me very much.
References: