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Re: ALPHA MODIFICATIONS

Posted: Tue Sep 25, 2018 10:59 pm
by exxos
Icky wrote:
Tue Sep 25, 2018 10:55 pm
No - not crap. Its fixed the sound. We have sound.
:WTF: *overload* :crazy:

Re: ALPHA MODIFICATIONS

Posted: Tue Sep 25, 2018 11:00 pm
by troed
Sound or key click?

Re: ALPHA MODIFICATIONS

Posted: Tue Sep 25, 2018 11:07 pm
by Icky
troed wrote:
Tue Sep 25, 2018 11:00 pm
Sound or key click?
Sound - that phaser type sound :)

EDIT - it is quite quiet though have to turn the monitor sound up to max

Re: ALPHA MODIFICATIONS

Posted: Tue Sep 25, 2018 11:12 pm
by exxos
Icky wrote:
Tue Sep 25, 2018 11:07 pm
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...

Re: ALPHA MODIFICATIONS

Posted: Tue Sep 25, 2018 11:12 pm
by exxos
and... one final "oh crap" I found the ACIA issue....

Re: ALPHA MODIFICATIONS

Posted: Tue Sep 25, 2018 11:16 pm
by Icky
exxos wrote:
Tue Sep 25, 2018 11:12 pm
and... one final "oh crap" I found the ACIA issue....
Go on then - one last fix for the night

Re: ALPHA MODIFICATIONS

Posted: Tue Sep 25, 2018 11:17 pm
by exxos
Icky wrote:
Tue Sep 25, 2018 11:16 pm
exxos wrote:
Tue Sep 25, 2018 11:12 pm
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-)

Re: ALPHA MODIFICATIONS

Posted: Tue Sep 25, 2018 11:18 pm
by Icky
exxos wrote:
Tue Sep 25, 2018 11:17 pm
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.

Re: ALPHA MODIFICATIONS

Posted: Tue Sep 25, 2018 11:21 pm
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
acitc.jpg (227.56 KiB) Viewed 953 times

STEP 2

8 wires to link as shown below..
br8.JPG
br8.JPG (394.02 KiB) Viewed 948 times

Re: ALPHA MODIFICATIONS

Posted: Wed Sep 26, 2018 12:14 am
by Icky
exxos wrote:
Tue Sep 25, 2018 11:21 pm
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
IMG_3106.png (774.12 KiB) Viewed 940 times