Re: Jon Relay's Apple II Info Archives: Memory Area Summary

[Jonathan Schattke <wizwom@ripco.com>]

David Empson wrote:
> Jon Bettencourt <jonINTERNETrelayCHAT@napaVALLEYnet.CLARInet> wrote:
> > $C100 - $C7FF (49408 - 51199): Peripheral Card Memory
> > $C800 - $CFFF (51200 - 53247): Extended Memory for Peripheral Card in Use
> > -- or --
> > $C100 - $C2FF (49408 - 49919): Extensions to System Monitor
> > $C300 - $C3FF (49920 - 50175): 80-Column Display Routines
> > $C400 - $C7FF (50176 - 51199): Self-Test Routines
> > $C800 - $CFFF (51200 - 53247): More 80-Column Display Routines
> 
> These descriptions apply mainly to the IIe.  The IIc may have a slightly
> different arrangement, and I'm sure the IIgs does.  None of this exists
> on the ][ or ][+.

Actually, the C000-CFFF space was set out for the Apple II, and the use of the
C3 and C8-CF pages for 80 column was an artifact of that.  The IIe uses that
same memory map, and the IIGS does in 6502 mode.  I'm not sure what the mapping
is in 16-bit mode for a IIGS, I suspect the I/O is mapped into the high end of
memory.

Other than that, pretty good, and thanks for the clarifications.

-- 
\  /\  /                                       If you aren't happy,
 VVizVVom - Wandering Kernel of Happiness           it's not my fault.
 ~~~> homepage at http://pages.ripco.net/~wizwom/ <~~~