[Coco] 1MB, 2MB, 8MB upgrades Was: Clud9 512K upgrade for the Coco3

[Gene Heskett]

On Thursday 29 January 2015 22:22:34 Stephen H. Fischer did opine
And Gene did reply:
> Will someone please refresh my memory.
> 
> TONY DISTEFANO 1 MB memory upgrade and his 2 MB memory upgrade included
> OS-9 programs to mark parts of memory used so that Graphics memory
> never had to cross a 512 KB boundary.
> 
> I have found his disk for the 1 MB upgrade with the "mega" program and
> I remember the 2 MB disk had a "mega2" program.
> 
> What is strange is that my last OS-9 boot disk does not have "mega2"
> called by the startup script and "mega2" is not on the disk.
> 
> Did I download a system patch from Delphi that made running these
> programs unnecessary?
> 
> I assume that NitrOS-9 includes this.

There was once, a long time ago, a byte in the init file that had to be 
changed from a $1f to a $7f in order for all the memory of my 2 meg kit to 
be reported, but this was well before the 6309 was discovered.  I just 
checked the only init.asm in a 2 day old pull, and apparently that byte 
has disappeared sometime in the last 20+ years as it is not there today, 
nor is there a reference to it's being removed in the .asm files header.

Also, in the FWIW category, the just built init module still shows its 
version 3.2.9 in the sign-on blurb.  If we are now calling it 3.3.0, 
should this not also be updated?


> I clearly remember telling Jeff Vavasour about this and he made a
> change to his CoCo3 Emulator.
> 
> SHF
> 
> ----- Original Message -----
> From: "Tony Cappellini" <cappy2112 at gmail.com>
> To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
> Sent: Thursday, January 29, 2015 12:14 PM
> Subject: [Coco] Clud9 512K upgrade for the Coco3
> 
> > Is the Triad 512K upgrade for the Coco 3 fully accessible under
> > Nitros9?
> 
> YES
> 
> > Are there any games or other programs written that require the 512k
> > upgrade? I don't expect that this can be fully accessed from Basic.
> > How do I verify that the system sees
> > the full 512k?
> > 
> > 
> > Thanks


Cheers, Gene Heskett
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