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

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Icky wrote: Tue Sep 25, 2018 10:55 pm No - not crap. Its fixed the sound. We have sound.
:WTF: *overload* :crazy:
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viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
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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: 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
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Re: ALPHA MODIFICATIONS

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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...
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
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viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
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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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https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
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Re: ALPHA MODIFICATIONS

Post 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
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Re: ALPHA MODIFICATIONS

Post 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-)
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https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
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Re: ALPHA MODIFICATIONS

Post 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.
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Re: ALPHA MODIFICATIONS

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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 6597 times

STEP 2

8 wires to link as shown below..
br8.JPG
br8.JPG (394.02 KiB) Viewed 6592 times
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
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Re: ALPHA MODIFICATIONS

Post 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 6584 times
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