Re: A86: TI-86 VAT
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Re: A86: TI-86 VAT
Yeah, but for the EII driver I will of course need to access
the program bytes themselves in order to copy them. I mainly
wrote down all that info for selfish use :) If I remember
correctly _get_word_ahl also leaves you a pointer to the
first byte of the program, so that does make a lot of sense.
What I really want to know now... how do I display the contents
of hl in decimal form at the current pen location using the tiny
font (I know there is a call for the 5x7 font, but thats way too
big) I know there has to be one somewhere... anybody found it yet?
Alan Bailey (sp?) wrote a routine to display hl in hex... but not
many people want to see that ase is 0176h bytes or whatever. I
wish people could have had sixteen fingers, or at least 8. Anybody
got an Xacto knife? :)
Also... The first six VAT entries seem to be system files. For
a user program should I omit them? For me user programs start at
around BFC7h if I remember correctly. The stuff before that is
xStat, yStat, fStat, Ans and two mysterious programs called # and
!. /me shrugs.
Regards,
Bryan
Joshua Grams wrote:
>
> At 08:42 AM 6/11/98 -0400, you wrote:
> >
> >Hi guys,
> >
> >If some of the gurus in here get a chance, I'd love having it checked
> >over for technical accuracy. Some of the info is basic... but hell,
> >I started z80 programming two days ago.
> >
> Looks great! A couple of nitpicky little things (but then, I'm a
> perfectionist). The VAT can never overflow pg. 7. In the variable routines
> I've looked at, that causes a memory error. To get the variable size, don't
> bother with _load_ram_ahl, just use _get_word_ahl ($521d) to get the size
> in de. Also, if you want the variable size in bytes, there's a ROM routine
> to do that. You know, because the size word at the start of the variable
> isn't the size in bytes for a bunch of the variable types.
>
> I call the routine _get_var_size. It's at $477f.
> Input: a=type, bhl=var data ptr
> Output: de=size (in bytes), ahl=var data ptr.
>
> --Joshua
--
Bryan Rittmeyer
mailto:bryanr@flash.net
http://www.bridges.edu/horizon/
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