[Coco] 1mb and 2mb memory upgrades

Kip Koon computerdoc at sc.rr.com
Sat Mar 14 22:13:42 EDT 2015


Hi Curtis,
With BIGBASIC using 2MB of RAM, you could have your own Mission Control Center! :)  

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 L. Curtis Boyle
> Sent: Saturday, March 14, 2015 7:29 PM
> To: CoCoList for Color Computer Enthusiasts
> Subject: Re: [Coco] 1mb and 2mb memory upgrades
> 
> They did. And there a couple of programs under DECB that used >512k... BIGBASIC was one that I recall was patched for the 1 and 2
> MB upgrades.
> 
> Sent from my iPhone
> 
> > On Mar 14, 2015, at 4:10 PM, tonym <tonym at compusource.net> wrote:
> >
> > When under DECB, did the 1MB and 2MB boards at least function as if they were a 512K upgrade?
> >
> > Tony
> >
> >
> > ---- Original Message ----
> > From: "Bill Pierce via Coco" <coco at maltedmedia.com>
> > Sent: 3/13/2015 2:42:10 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....
> >
> >
> >
> > --
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