[Coco] CP/M emulator for OS9/6809

Nick Marentes nickma2 at optusnet.com.au
Sun Apr 27 17:26:08 EDT 2014

On 28/04/2014 7:13 AM, Retro Canada wrote:
> if you run os-9 level 2 in 6309 it's already in native mode which is 30% faster on average. this is what i do at home. there are some instructions that i could benefit from 6309 but dont think it would make any major impact. i made it for 6809 to not restrict the audience.
> what could really speed up would be using lookup tables for some instructions byt this would take more memory than the coco itself could handle.

But because the OS is 6309, does that translate to all programs?

I know you can turn on 6309 and get faster execution of all codes but 
the speed boost is obtained from writing 6309 native and utilizing some 
of the extra commands.

This is my understanding and what I was referring to for Luis's CPM 

As it stands, it's not really practical to use any CPM programs because 
of the speed. Shame because Luis has done a great job of making it run 
at all. Just needs that little bit of extra speed to put the icing on 
the cake.

Also, doesn't Level 2 OS-9 utilize more memory or are applications still 
restricted to a 64K memory space?

Sorry for my lack of knowledge in OS-9, hence the many stupid 
questions.   :)


More information about the Coco mailing list