[Coco] Cartridge size limit?

[Lee Patterson]

I was thinking in terms of my next Coco 3 based game. Need to get an idea of what I should target. Bouncy Ball is just under 20K. 32K isn't much better, so an MMU system would be preferable if it is cost effective.

--- -- -  -
www.8BitCoder.com


> On May 3, 2016, at 3:23 PM, L. Curtis Boyle <curtisboyle at sasktel.net> wrote:
> 
> Yes, you could (as both John and I mentioned - you need MMU style supporting hardware). I *think* Lee was asking about “normal” cartridges.
> 
> 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 1:19 PM, Hendrikus Rietveld <rietveldh at hotmail.com> wrote:
>> 
>> 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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