[Coco] Cartridge size limit?

[L. Curtis Boyle]

John is correct - 16K for Coco 1/2 (minus I/O space, of course), and 32K for the Coco 3 (minus I/O as well, and vector page RAM if your app requires it). Paks like Predator and Robocop that went past that added their own MMU-style hardware to support anything >32K, as there is only 32K of address space to use (everything past that must be bank switched).

L. Curtis Boyle
curtisboyle at sasktel.net

TRS-80 Color Computer Games website
http://www.lcurtisboyle.com/nitros9/coco_game_list.html



> On May 3, 2016, at 12:59 PM, John W. Linville <linville at tuxdriver.com> wrote:
> 
> Note that Robocop uses a bank-switching technique to achieve that,
> and AFAIK no one is actively producing such hardware (yet).
> 
> For "normal" (i.e. not bank-switched) usage, a CoCo ROM Pak is limited
> to a bit less than 16K.  For a CoCo3-only ROM Pak, the normal limit
> would be a bit less than 32K.
> 
> John
> 
> On Tue, May 03, 2016 at 02:53:39PM -0400, Lee Patterson wrote:
>> Thanks, I Just verified that it is indeed 128k. 
>> 
>> http://www.lcurtisboyle.com/nitros9/robocop.html
>> 
>> 
>> --- -- -  -
>> 10 + 1 = 3
>> 8BitCoder.com
>> 
>>> On May 3, 2016, at 14:45, Hendrikus Rietveld <rietveldh at hotmail.com> wrote:
>>> 
>>> Robocop is 128k?
>>> 
>>> Sent from my BlackBerry 10 smartphone.
>>> Original Message
>>> From: Lee Patterson
>>> Sent: Tuesday, May 3, 2016 2:36 PM
>>> To: Bill Pierce via Coco
>>> Reply To: CoCoList for Color Computer Enthusiasts
>>> Subject: [Coco] Cartridge size limit?
>>> 
>>> 
>>> What is the max size for a cartridge based app?
>>> 
>>> --- -- -  -
>>> 10 + 1 = 3
>>> 8BitCoder.com
>>> 
>>> --
>>> 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
>> 
>> -- 
>> Coco mailing list
>> Coco at maltedmedia.com
>> https://pairlist5.pair.net/mailman/listinfo/coco
> 
> -- 
> John W. Linville		Someday the world will need a hero, and you
> linville at tuxdriver.com			might be all we have.  Be ready.
> 
> -- 
> Coco mailing list
> Coco at maltedmedia.com
> https://pairlist5.pair.net/mailman/listinfo/coco
>