[Coco] Kicking the Z-80 butts...

[CoCo Demus]

Yes it runs as OS-9 application and all bdos and bios calls are provided
using OS-9. As there is not direct replacement for them so some works is
needed but disk, screen, keyboard is all performed using OS-9 system calls.
The rest of the binary code is interpreted by the emulator, simulating z-80
registers, flags, etc.

CP/M does not access your computer directlym, instead it relies in a set of
BIOS and BDOS calls. These calls are customized for each vendor, this is
why it was possible to emulate them.

I don't have more info, I've provided all the source code. But you can find
CP/M info here:

http://www.seasip.demon.co.uk/Cpm/bios.html
http://www.seasip.demon.co.uk/Cpm/bdos.html

On Wed, Apr 29, 2015 at 9:34 AM, Salvador Garcia <
ssalvadorgarcia at netscape.net> wrote:

> I am still trying to understand this.
>
>
> Your emulator runs as an application of NitrOS9? What functionality of
> NitrOS9 do you use? Disk i/o, screen i/o.. etc?
>
>
> This is fascinating! Do you have info online where I can read more about
> your project or CP/M - Z80 emulators in general?
>
>
> Impressionante!
>
>
> Salvador
>
>
>
>
>
>
>
>
>
>
> -----Original Message-----
> From: CoCo Demus <retrocanada76 at gmail.com>
> To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
> Sent: Tue, Apr 28, 2015 8:24 am
> Subject: [Coco] Kicking the Z-80 butts...
>
>
> That's why MC6809 is the king of 8-bit
> processors:
>
> https://youtu.be/Ysn7Na60ZGA
>
> Who needs a Z-80 anyway ??? You can
> have 4, 5 or more on MC6809 @ 2Mhz!
>
> I have optimized even more my cp/m emulator
> and now you get wordstar
> running at an acceptable speed.
>
> enjoy the video
>
> --
>
> 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
>