[Coco] s/sc on os-9 l2

[Luis Antoniosi (CoCoDemus)]

Do you have a schematic or image of this fix ?


On Fri, May 10, 2013 at 8:47 AM, Robert Gault <robert.gault at att.net> wrote:

> Willard Goosey wrote:
>
>> On Thu, May 09, 2013 at 10:18:12PM -0400, Luis Antoniosi (CoCoDemus)
>> wrote:
>>
>>> the s/sc seems to be useless on level 2 since it doubles the clock needed
>>> for the speech and sound generation. Is there any fix for that ?
>>>
>>
>> First, the 2MHz fixes include a switch to control which clock rate is
>> fed to the YM chip -- E or doubled-E.  Fancier versions of this fix
>> auto-detect!
>>
>> Second, the speech chip is completely unaffected by the E clock rate
>> and sounds the same at either speed.
>>
>> Willard
>>
>>
> In addition to the switch, I've found it necessary to cause more high
> frequency signal to feed to the -6v power supply. I put a 470pf cap across
> R16.
>
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