Darn, was hoping it would be easy, but previous experience tells me schematics have errors. Weird.

Guess the MFP is coming out next. Stay tuned...

Perfect! Thanks for all your help. I think I found an issue, but I want to confirm before I solder a bodge wire. Pin 45 is the IACK pin on the MFP, and it looks like the GST should signal to the MFP it got the interrupt request, and I assume at that point will then pass the vector info on the buss f...

Pin 93 is from the MFP to request the interrupt, I see there is an ack pin too...

Worth checking

Have you checked they have pull-up resistance such as 10K to 5V ? Checked they are not shorted to GND ? Indeed I am not overly sure about the interrupt lines but I don't think 2 should be low at once like that. But could suggest the GST may be buggered at this point. I did just check pin 32 on the ...

Interesting. So assuming I have the right pinouts (Logic probe powered off the 4700uf cap and the shield around the cart port): 25 IPL2 LOW 26 IPL1 LOW 27 IPL0 HIGH Lines all tone out to the GST MCU... Does this mean mean a surface mount chip replacement is in my future? The block diagram below soun...

Thanks will check, I did neglect to mention I checked the ipl lines and had continuity. My luck it will be that component:). Guess I will need to learn smd rework skills but not on this board.

I'd suggest that you might want to look at getting an upgrade to TOS, as 1.02 isn't great. I'd go for 1.04, which you can get here: https://www.exxosforum.co.uk/atari/store2/#0057 If you wanted to go for dual TOS, then there are options a little further down on that page. As for the floppy drive, I...

I am having a bit of trouble trying to trouble shoot an UK 1040 STE. When turning it on I get bombs across the whole screen. The machine originally had the video shifter, the CPU, and the TOS ROMs socketed. I have cleaned all the sockets with deoxit, reseated, etc. I have also swapped out the TOS ro...

Maximilian wrote: ↑Sun Mar 03, 2019 3:25 pm The .075 is the 2mm variant, I like it just that little bit more than the 3mm variant, but it gets expensive as i had weeks where i use about 10meters

The trade name is Chem-Wik from Chemtronics in the USA.

Maybe you can get me a discount

Let me know what you need and I can find out...

ube wrote: ↑Tue Nov 20, 2018 11:45 pm Indeed. Going to take the weekend to perfect my drag soldering skills and I'll hopefully have some 30 for sale in a while..

Did you ever get these up for sale?