[coco] 6309 speed

[Gene Heskett]

On Friday 12 August 2005 17:18, jdaggett at gate.net wrote:
>Curtis
>
>WHere I used to work we used 68B09 based boards that were using
>a 12MHz crystal. These were r unning 24/7 on the factory floor for
>months at a time with no problems.
>
>That correlates to a buss frequency of 3 MHz.
>
>james

The 63C09's I have are rated for 4 according to the hitachi book.

>On 11 Aug 2005 at 22:21, L. Curtis Boyle wrote:
>
>Date sent:       Thu, 11 Aug 2005 22:21:41 -0600
>From:            "L. Curtis Boyle" <curtisboyle at sasktel.net>
>Subject:         Re: [coco] 6309 speed
>To:              CoCoList for Color Computer Enthusiasts
><coco at maltedmedia.com>
>Send reply to:  	CoCoList for Color Computer Enthusiasts
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>>      When Kevin Darling originally started talking about the 6309
>> on the
>> newsgroups (you can find the original articles on Google's
>> newsgroups), he  mentioned that several people had them running
>> from 4 to 5 MHz reliably. I  know I had the 68B09 running at 2.25
>> MHz with a clock crystal upgrade,  although it popped my Magnavox
>> 8515 monitor at the time (downclocked it  back to 2Mhz (real, not
>> the 1.78MHz stock Coco 3's run at) after that).  Ran perfectly
>> reliably then, and one of my Coco 3's in storage is still at  a
>> true 2MHz, and ran that way for years.
>>
>> On Wed, 03 Aug 2005 09:09:18 -0600, <jdaggett at gate.net> wrote:
>> > Gene
>> >
>> > I seriously doubt that 20 to 30 MHz speeds could be obtained. At
>> > least  not operating at 5VDC.  Maybe at 6.5 VDC. More realistic
>> > is 5 to 10 MHz. The problem  wil lbe not all will do that. Maybe
>> > 1% of all 6309 will do 10MHz. Maybe 50% will do  5 MHz.
>>
>> --
>> L. Curtis Boyle
>>
>> --
>> Coco mailing list
>> Coco at maltedmedia.com
>> http://five.pairlist.net/mailman/listinfo/coco

-- 
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