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.
It only seems to say is driven with a open collector, but does not really say is needed for any reason..
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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.
It can also be where you have grounded the scope.. assuming you are on a gnd point very close to the DMA..
Also try on x10 probe... Sometimes a probe itself can appear to give you things which are not actually there...
It is also worth probing every pin of the DMA to see if anything looks odd... The address and databus to the DMA will likely look like chaos anyway..
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.
Icky wrote: ↑Mon Oct 08, 2018 11:38 pm
Odd though as I did get the device recognised once but not since - must of been a fluke or all the stars aligned
Have you tried with and without the RP900 in place ?
Other than that TTL chip there isn't much else to check... for the hell of it, if you have a 001 DMA
It could be possible noise on the DMA port itself on a dataline ?
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.