[Coco] Cartridge size limit?

[Hendrikus Rietveld]

Can't you use a pak like the new flash pak to dump your rom and have it bank switched with the software?    Thought I heard that at the fest in Chicago

Sent from my BlackBerry 10 smartphone.
  Original Message
From: L. Curtis Boyle
Sent: Tuesday, May 3, 2016 3:12 PM
To: CoCoList for Color Computer Enthusiasts
Reply To: CoCoList for Color Computer Enthusiasts
Subject: Re: [Coco] Cartridge size limit?


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
>>>
>>> --
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>>
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> --
> John W. Linville              Someday the world will need a hero, and you
> linville at tuxdriver.com                        might be all we have.  Be ready.
>
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