Apple IIc+ boot disk for DOS3.3

From: Adrian Graham <agraham_at_ccat.co.uk>
Date: Mon Aug 7 03:51:13 2000

There's a question - since I can't get to the FAQs ATM can anyone tell me
which Mac monitor I can use with the ][GS? And the ][c+ for that
matter......

> -----Original Message-----
> From: Paul R. Santa-Maria [mailto:paulrsm_at_ameritech.net]
> Sent: 06 August 2000 18:28
> To: classiccmp_at_classiccmp.org
> Subject: Re: Apple IIc+ boot disk for DOS3.3
>
>
> > > There are, of course, many other features in the ROM; it's just a
> matter of
> > > digging up the programming info. And (since you have such a late
> member of
> > > the ][ series) there are also features in the hardware,
> such as double-
> > > resolution text, low-res, and high-res modes, that the
> ROM was never
> updated
> > > to handle.
> > How do you get at these modes? Are they in the IIgs, also?
> >
> > Speaking of which, can you drive the IIgs graphics chip and
> sound chip,
> > whatever they're called, from Applesoft?
>
> The double-resolution text mode is 80-column mode, and can be
> turned on
> with PR#3. This mode is supported by the ROM.
>
> The double low-res (twice as wide, not half as wide!) and
> double hi-res
> modes are not supported by the ROM. You can write BASIC
> routines to use
> them, but it is much faster to use assembly language routines
> called by
> BASIC. These modes are also in the Apple IIe and IIc.
>
> The IIgs has super-res modes with hardware color fill
> available. I am not
> a IIgs programmer (I use mine as a IIe) but there may be ROM
> routines in
> the toolbox to support those modes. The same may be true for the IIgs
> sound chip. I have seen a BASIC program that used the sound
> chip, but all
> it did was POKE the data into memory.
>
> No Apple II has real support for even the built-in speaker in the ROM,
> except for the Programmer's Aid #1 option for Integer BASIC
> which had tone
> routines.
>
> Paul R. Santa-Maria
> Ann Arbor, Michigan USA
> paulrsm_at_ameritech.net
>
Received on Mon Aug 07 2000 - 03:51:13 BST