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ALPHA MODIFICATIONS

All information relating to the Alpha plus all the WIP threads etc.
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exxos
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Re: ALPHA MODIFICATIONS

Post by exxos »

Icky wrote: 25 Sep 2018 22:55 No - not crap. Its fixed the sound. We have sound.
:WTF: *overload* :crazy:
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troed
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Re: ALPHA MODIFICATIONS

Post by troed »

Sound or key click?
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Re: ALPHA MODIFICATIONS

Post by Icky »

troed wrote: 25 Sep 2018 23:00 Sound or key click?
Sound - that phaser type sound :)

EDIT - it is quite quiet though have to turn the monitor sound up to max
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Re: ALPHA MODIFICATIONS

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Icky wrote: 25 Sep 2018 23:07 EDIT - it is quite quiet though have to turn the monitor sound up to max
Its a new amp circuit, can tweak it at some point...
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Re: ALPHA MODIFICATIONS

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and... one final "oh crap" I found the ACIA issue....
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Re: ALPHA MODIFICATIONS

Post by Icky »

exxos wrote: 25 Sep 2018 23:12 and... one final "oh crap" I found the ACIA issue....
Go on then - one last fix for the night
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Re: ALPHA MODIFICATIONS

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Icky wrote: 25 Sep 2018 23:16
exxos wrote: 25 Sep 2018 23:12 and... one final "oh crap" I found the ACIA issue....
Go on then - one last fix for the night
This won't be so simple, I've wired the ACIAs to the wrong side of the data bus 8-)
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Re: ALPHA MODIFICATIONS

Post by Icky »

exxos wrote: 25 Sep 2018 23:17 This won't be so simple, I've wired the ACIAs to the wrong side of the data bus 8-)
Oh that is an "oh crap" moment.

I won't do that tonight.
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Re: ALPHA MODIFICATIONS

Post by exxos »

ACIA DATABUS FIX


STEP 1

First up is to cut the ACIA data bus... 8 tracks to cut on the bottom of the PCB...

acitc.jpg

STEP 2

8 wires to link as shown below..
br8.JPG
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Re: ALPHA MODIFICATIONS

Post by Icky »

exxos wrote: 25 Sep 2018 23:21 ACIA DATABUS FIX
STEP 1

First up is to cut the ACIA data bus... 8 tracks to cut on the bottom of the PCB...

STEP 2

8 wires to link as shown below..
Photo of fix including the keyboard resistor pull-up fix

IMG_3106.png
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