[Coco] Re: 64K Mode

[John Collyer]

Your exactly right SuperPatch EDTASM does work
that way.  What I meant to say is it uses the ROM/RAM
switch.  I have not checked if the page mode switch works
yet, but when I get to my coco3 I'll give it a try.

John Collyer

----- Original Message ----- 
From: "Robert Gault" <robert.gault at worldnet.att.net>
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Sent: Wednesday, January 14, 2004 3:58 PM
Subject: Re: [Coco] Re: 64K Mode


> John Collyer wrote:
> > That's true, but it also works on a coco3.  Try it.
> > Run SuperPatch EDTASM+ on a coco3 emulator
> > and see if it don't work.  I'll bet it does.
> >
> > John Collyer
> >
> > ----- Original Message ----- 
> > From: <jdaggett at gate.net>
> > To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
> > Sent: Wednesday, January 14, 2004 12:57 PM
> > Subject: Re: [Coco] Re: 64K Mode
> >
>
> Guys guys, you can't win debates when both sides don't understand the
> terms of the contest!
>
> What does SuperPatch do with memory? What is meant by "page mode?
>
> 1) SuperPatch by Roger Schrag, Rainbow, 1983, flips back and forth
> between 64K RAM and 32K lower RAM, 32K upper ROM as needed for disk I/O.
> It does not keep ROM constant and swap between banks of lower 32K RAM.
>
> 2) Page mode in this discussion refers to keeping 32K upper ROM and
> flipping between 2 banks of 32K RAM in lower memory.
>
> 3) The Coco1 & 2 have the page select defined at $FFD4-$FFD5. Poke $FFD4
> get page0, poke $FFD5 get page1. The Coco3 does not have this latch
> listed in the service manual and it probably does not work.
>
> What you two (Daggett / Collyer) need to agree on is to test the
> $FFD4-$FFD5 latch on a Coco3. Either it works or it doesn't, simple as
> that. Then you can tell the rest of us if this memory mode works on a
Coco3.
>
>
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