In article 
,
 David Wilson  wrote:

> On Jul 4, 4:02 am, "John B. Matthews"  wrote:
> > > > > Oliver: the code above was from a ProDOS system program. A 
> > > > > non-system cc65 program launched from the Basic
prompt under 
> > > > > ProDOS is running alongside BASIC.SYSTEM. It might be 
> > > > > necessary to update the BASIC Global Page Default
I/O vectors 
> > > > > after initializing the card:
> 
> If the cc65 program is running with BASIC.SYSTEM, wouldn't it just
> need to do the equivalent to PRINT CHR$(4);"PR#3"?
> 
> i.e.
> 
> puts("\004PR#3");
> 
> That way BASIC.SYSTEM will take care of the I/O vectors for you.

Not with conio. Looking at libsrc/apple2/cputc.s, putchar stores 
characters in video memory, bypassing the I/O hooks.

I'd have thought sdtio might work, as you suggest. It uses _write, which 
calls COUT, which in turn vectors through zero page CSWL/H, owned and 
operated by ProDOS. I don't know why it's not working.

-- 
John B. Matthews
trashgod at gmail dot com
home dot woh dot rr dot com slash jbmatthews
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