[A83] Re: What the heck is RST???
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[A83] Re: What the heck is RST???
Well, unless I misunderstood, he only needs to swap the pages to read a bit
of data from the ROM page (which he can stick on the stack, or some other
place still accessible while the RAM page is out). Once he's done doing
that, he can swap back in the RAM page, and use all ROM calls like usual.
And like Michael said, most ROM calls use RAM areas, and they get pretty
long if you want to put the *whole thing* in your application.
-Dan Englender
----- Original Message -----
From: "Michael Vincent" <hookman@worldnet.att.net>
To: <assembly-83@lists.ticalc.org>
Sent: Saturday, July 07, 2001 4:57 PM
Subject: [A83] Re: What the heck is RST???
>
> That's more complicated then you think. I may be wrong, but routines like
> _vputmap use system RAM area such as sfont_record I think.
>
>
> Michael Vincent
> Detached Solutions - www.detacheds.com
> Radical Software - www.radicalsoft.org
>
> ----- Original Message -----
> From: "Hyperbyte" <hyper@hysoft-automation.com>
> To: <assembly-83@lists.ticalc.org>
> Sent: Saturday, July 07, 2001 1:50 PM
> Subject: [A83] Re: What the heck is RST???
>
>
> >
> > Well, then, it would be an idea to include some of the rom routines
> > into the program, are the _vputs, _ipoint, and _dispop1a routines
> > found somewhere, or should I use VTI to find them out?
> >
> > --Peter-Martijn
> >
> >
> > > You can't use *any* system RAM (that includes flags, OP registers,
graph
> > > buffer, saveSScreen, appBackUpScreen, etc) while you have the page
> swapped,
> > > and you can't use any ROM routine that would use system RAM
> (additionally,
> > > TIOS checks to make sure a RAM page is loaded in port 7 in some
places).
> > >
> > > And yes, for restoring the page, you can get the current page that's
> there
> > > with "in a,(7)", save that value, and output it to port 7 after you're
> > > through.
> > >
> > > -Dan Englender
> > >
> > >
> > > > -----Original Message-----
> > > > From: assembly-83-bounce@lists.ticalc.org
> > > > [mailto:assembly-83-bounce@lists.ticalc.org]On Behalf Of Hyperbyte
> > > > Sent: Saturday, July 07, 2001 2:27 PM
> > > > To: assembly-83@lists.ticalc.org
> > > > Subject: [A83] Re: What the heck is RST???
> > > >
> > > >
> > > >
> > > > Are there any implications to doin so?
> > > > Since 8000h+ is normally used by flags and so, I assume they can't
be
> used
> > > > directly.
> > > > Also, how do I get the ram page back.
> > > > (I assume "in a,(07h)"
> > > >
> > > > is this correct to modify the pointers read from the VAT:
> > > >
> > > > hl contains the location in the 4000h range...
> > > >
> > > > res 6,h
> > > > set 7,h
> > > >
> > > > ld a,(hl)
> > > > ...
> > > >
> > > > It would be a whole lot faster than ld[a|c]indpaged'ing
> > > >
> > > > --Peter-Martijn
> > > >
> > > >
> > > >
> > >
> > >
> > >
> >
> >
> >
> >
>
>
>
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