Re: A92: Non-wrapping text?
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Re: A92: Non-wrapping text?
Bryan Christopher Turner wrote:
> > >
> > > > Is there any way to use the TI-92:s built-in text output
> functions
> > > > without
> > > > wrapping? It looks kinda ugly...
> > > >
> > > My idea about this would be, to program an own DrawStrXY function,
> using
> > > the DrawCharXY function,
> > > or using the character table in the TI-92's ROM (I think, it's
> address
> > > can be got by the tios-pseudolib)
> >
> > That would work, but it would be *very* slow. I think the TI-OS must
> be
> > able to do this somehow - just look at the history of the main
> screen
> > when you input something long enough.
>
> If you use a function to draw the characters from ROM, and a little
> counter
> to make sure the text doesn't draw off the edge of the screen, it
> would be
> remarkably fast. Then you could scroll the line by incrementing the
> text
> pointer by one char and reprinting the line, scroll back by
> decrementing.
> Then, never allow the pointer to decrement further back than the
> beginning of
> the string, and never allow it to increment more than ScreenCharWidth
> from the
> end. If you wanna get fancy, after drawing the string on the screen,
> if the
> string pointer is not at the beginning, print a <- at the front, and
> if the
> string extends beyond the edge of the screen, print a ->.
>
> I'm sure the function is probably in ROM somewhere, try searching
> for the <-
> and -> symbols in ROM. Then disassembling in that area.
I'm again a litlle bit late in anwering... but there were some problems
with my email.
I made this some time ago, for a disassembler, I'm working on. (It needs
vertical scrolling
for some very long commands) My own DrawStrXY -
function is really very fast, because the color, the y-pos, and
what1-what3 (the parameters
for the PutCharXY - function) can stay on the stack, so only 2 words
have to be pushed
for each char. What I also did, to increase speed, was to don't draw
space characters.
References: