Okay, I have installed the new replacement cracked resistor & I have installed all the SIPs.
Result: No video output on either TT output or VME graphics output :O
* Notes, I can see the hard drive loading, so I think the machine is running, just without display.
Whats my next move, remove all the SIPS?
Here is a photo of my SIP installation:
Atari TT - Bus errors, advice needed! - SOLVED
Re: Atari TT - Bus errors, advice needed!
Have you got pin 1 of the sips right way ? (normally square pads on pcb) and nothing shorting on the pins to pcb or to each other ?
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: Atari TT - Bus errors, advice needed!
Okay fixed it lol. The SIPS were all fine, it was the resistors I soldered in to fix the cracked ones. I dunno why but they were causing the no display.
*update: Now my floppy drive works It is reading, writing and formatting perfect now. Also: ST ram test in Yaart passes no issues, also seems to go through the tests twice as fast!
So I'm getting there.. now I just need to work out what to replace the resistors with.. Here is a photo of the location, note the two missing resistors have a C designation, that is odd..
They are c218 and c220. They were: brown green brown silver silver.
I used these: http://au.element14.com/webapp/wcs/stor ... reId=10184
But obviously I must have gone horribly wrong?
Re: Atari TT - Bus errors, advice needed!
What exactly are you looking at ? "C" is normally capacitor not resistor.. Can you find those parts on the diagram ?
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: Atari TT - Bus errors, advice needed!
Right above those blue thingy mabobs. I've removed them, the designations are there. Click full screen I added a comment and a box around them.
Re: Atari TT - Bus errors, advice needed!
Can you find them on the TT schematic so we can see what they actually are...
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: Atari TT - Bus errors, advice needed!
I've had a look but I cannot see them. Maybe Atarian Computing can help with that.
Re: Atari TT - Bus errors, advice needed!
I checked in this persons motherboard photo, on their revision H, they have two of the regular yellow ceramic caps in those places:
https://www.exxosforum.co.uk/forum/viewt ... f=58&t=591
Where mine seemed to have those odd resistors, very strange
https://www.exxosforum.co.uk/forum/viewt ... f=58&t=591
Where mine seemed to have those odd resistors, very strange
Re: Atari TT - Bus errors, advice needed!
Well "old skool" capacitors did have colour codes like resistors.. just I haven't seen any for like 30 yearsSteve wrote: ↑Fri Aug 03, 2018 2:24 pm I checked in this persons motherboard photo, on their revision H, they have two of the regular yellow ceramic caps in those places:
https://www.exxosforum.co.uk/forum/viewt ... f=58&t=591
Where mine seemed to have those odd resistors, very strange
If you look online probably a calculator to convert the colours. Assume it be 100nF or something like that.. depends what its connected to..
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.