[Coco] [Color Computer] Hitachi 6309 questions

[Mike Pepe]

Cloud9 should have the 6309's

 

The clock rate of a CoCo 3 is fixed and cannot be bumped up to anything
appreciably faster. The best you can do is insert additional clocks
during internal processing time (AVMA cycles) - see Sockmaster's site
for his circuit that accomplishes this.

 

The "emulation" mode and the native mode are switched via a bit. I'd
check the Wikipedia article on the 6309 for some links that may explain
this in more detail.

 

IMHO the 6309 upgrade's biggest benefit is the lower power consumption. 

 

From: ColorComputer at yahoogroups.com
[mailto:ColorComputer at yahoogroups.com] On Behalf Of David Bush
Sent: Wednesday, February 11, 2009 10:53 AM
To: ColorComputer at yahoogroups.com
Subject: [Color Computer] Hitachi 6309 questions

 

Where can I get a 6309 upgrade pack for my 512K CoCo 3? I would like
to be able to run it at 3.5 MHz at least, preferably 5 MHz. Can the
CoCo memory and the rest of the motherboard handle such speeds?



NitrOS-9 looks great, but there is also a lot of great CoCo software
out there designed for RS-DOS. Specifically, Max-10 word processor,
CoCoMax 3 graphics editor, and lots of games. I understand the 6309
has an emulation mode versus a native mode, but how does the user
switch between these modes? Could 6809 software inadvertently switch
modes, resulting in possibly buggy behavior?

Thanks!

David



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