[Coco] 1mb and 2mb memory upgrades

[Kip Koon]

Hi Bill,
Here, Here!  I agree with everything you said!  

Kip Koon
computerdoc at sc.rr.com
http://www.cocopedia.com/wiki/index.php/Kip_Koon



> -----Original Message-----
> From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of Bill Pierce via Coco
> Sent: Friday, March 13, 2015 2:42 PM
> To: coco at maltedmedia.com
> Subject: Re: [Coco] 1mb and 2mb memory upgrades
> 
> 
> 
> Brian, exactly :-)
> Paul Barton's last board was up to 64 meg IIRC.
> Here's the link to his old site (or at least part of it)  http://www.reocities.com/idezilla/CoCoZilla/thumnail.html
> 
> The trick is all in the DAT board as it makes the memory available to the system.
> 
> Keep in mind, this is "available" memory... That doesn't mean anything was ever programmed to use it as no one (that I know of) ever
> bought enough of the boards to justify writing software for it. I think Robert Gault has one of Paul's 8-meg boards and is the only
> person I know of with one.
> With that said, even the 1 & 2 meg upgrades have never been used for anything in DECB other than maybe a ramdisk.
> NitrOS9 will automatically use the 1 & 2 megs for more 64k workspaces, graphics, get/put buffers, and windows. Any more than 2
> meg and OS9 would have to be slightly modified again, but no big deal, just an extended memory map and a few bytes changed in
> IOMan. Still 100% compatability :-) To use this memory in DECB, the roms would have to be completely re-written losing all
> compatability with old software....  and may be with some rom mods, extra graphics pages.
> Chalk another one up to the modularity of OS9 as it lost no compatability, only gaining in versitality :-)
> 
> 
> Bill Pierce
> "Today is a good day... I woke up" - Ritchie Havens
> 
> 
> My Music from the Tandy/Radio Shack Color Computer 2 & 3 https://sites.google.com/site/dabarnstudio/
> Co-Contributor, Co-Editor for CocoPedia
> http://www.cocopedia.com/wiki/index.php/Main_Page
> E-Mail: ooogalapasooo at aol.com
> 
> 
> 
> 
> -----Original Message-----
> From: Brian Blake <random.rodder at gmail.com>
> To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
> Sent: Fri, Mar 13, 2015 1:47 pm
> Subject: Re: [Coco] 1mb and 2mb memory upgrades
> 
> 
> On 3/13/2015 1:46 PM, Luis Antoniosi (CoCoDemus) wrote:
> > 2MB is the maximum you
> can use in the MMU registers: 256 x 8K
> >
> > Luis Felipe Antoniosi
> >
> 
> Someone
> forgot to tell that to Paul Barton....
> 
> 
> 
> --
> 
> ------------------------------------------------------------------------
> Tandy
> Color Computer <http://www.tandycoco.com> Tandy CoCo Forum <http://www.tandycoco.com/forum>
> 
> --
> Coco mailing
> list
> Coco at maltedmedia.com
> https://pairlist5.pair.net/mailman/listinfo/coco
> 
> 
> 
> 
> --
> Coco mailing list
> Coco at maltedmedia.com
> https://pairlist5.pair.net/mailman/listinfo/coco