[A83] Re: Y-vars
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[A83] Re: Y-vars
I usually use equation vars just like string....
ld hl,Y1Def
rst rMOV9TOOP1
rst rFINDSYM
call nc,DeleteIt
ld hl,20
B_CALL CreateEqu <--I think that's the right rom call.
Inc de
Inc de
Ld hl,myEquationData
Ld bc,20
Ldir
Ret
DeleteIt:
B_CALL DelVar
Ret
Y1Def: db whatever it is...don't feel like looking it up
Is this good or bad practice? Neither?
Thomas Lutz
Stevens Institute of Technology
-----Original Message-----
From: assembly-83-bounce@lists.ticalc.org
[mailto:assembly-83-bounce@lists.ticalc.org] On Behalf Of Brandon
Sterner
Sent: Sunday, December 16, 2001 7:45 PM
To: assembly-83@lists.ticalc.org
Subject: [A83] Re: Y-vars
the first two bytes of the equation data are the length of the equation.
you will need to modify these to the resulting length. use deletemem to
delete what ever data was in the equation var previously. then you can
use
insertmem to insert your data. bit 5 of the object type byte in the vat
entry toggles wether or not its selected for graphing. locations. The
values in the bytes starting at location 9776h contain numbers 0
through 6
which indicate what type of line should be plotted.
Brandon Sterner
----- Original Message -----
From: "Patai Gergely" <patai.ti@freemail.hu>
To: <assembly-83@lists.ticalc.org>
Sent: Sunday, December 16, 2001 2:06 PM
Subject: [A83] Y-vars
>
> It just came into my mind: could someone explain me
> in steps how data can be stored into the y-vars,
> given that I have the address and the length of the data?
>
> PG
>
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