Theres 4 caps around the DMA already.. no need to add a 5th..
ALPHA MODIFICATIONS
Re: ALPHA MODIFICATIONS
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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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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.
Re: ALPHA MODIFICATIONS
For the sync fix I pulled both pins 8 and 9 out of the U51 socket and then jumpered the socket.
If it ain't broke, test it to Destruction.
Re: ALPHA MODIFICATIONS
Do you have a photos of the change for us less technical builders? And did this resolve the sync problem?Forgottenmyname wrote: ↑Tue Sep 18, 2018 10:45 am For the sync fix I pulled both pins 8 and 9 out of the U51 socket and then jumpered the socket.
Atari Falcon 030 | Atari 1040 STE | Atari 1040 STFM | Atari 1040 STF | Kryoflux & Supercard Pro Flux boards
Creator of the Atari ST Review magazine archive: https://www.chillichai.com/atari-st-review
Creator of the Atari ST Review magazine archive: https://www.chillichai.com/atari-st-review
Re: ALPHA MODIFICATIONS
Hopefully you can see it on here.
It didn't sort my sync problem but will work on that.
It didn't sort my sync problem but will work on that.
- Attachments
-
- 20180918_111006.jpg (3.78 MiB) Viewed 5085 times
If it ain't broke, test it to Destruction.
Re: ALPHA MODIFICATIONS
You shouldn't pull pin 9 because you will have 2 floating gates in the chip then due to disconnected inputs.Forgottenmyname wrote: ↑Tue Sep 18, 2018 10:45 am For the sync fix I pulled both pins 8 and 9 out of the U51 socket and then jumpered the socket.
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.
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.
Re: ALPHA MODIFICATIONS
Ok will put 9 back in, good point
If it ain't broke, test it to Destruction.
Re: ALPHA MODIFICATIONS
BR PULL UP FIX
Bodge wire 1... Wire the thick yellow drawn wire as shown on the back of the pcb...
(Fixing missing pull up resistor on BR).
Bodge wire 1... Wire the thick yellow drawn wire as shown on the back of the pcb...
(Fixing missing pull up resistor on BR).
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.
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.
Re: ALPHA MODIFICATIONS
BGACK PULL UP FIX
Bodge resistor 1..... 2.2K between the 2 circled points on back of CPU socket...
(fixes missing pull up on BGACK)
Bodge resistor 1..... 2.2K between the 2 circled points on back of CPU socket...
(fixes missing pull up on BGACK)
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.
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.
Re: ALPHA MODIFICATIONS
Its a missing pull up resistor on BR & BGACK.
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.
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.