- Screenshot 2025-04-27 at 12.14.56.png (829.03 KiB) Viewed 328 times
Can all registered uses please login, even just for a few minutes..
It helps build a picture where our "good traffic" is coming from..
Thanks :)
It helps build a picture where our "good traffic" is coming from..
Thanks :)
Trying to fix Mikro's wrecked TT board
Re: Trying to fix Mikro's wrecked TT board
Cat can even find a single warm capacitor to sit on.
d:m:l
BadMooD d/l: https://www.leonik.net/dml/sec_bm.py
SVO30 d/l: https://www.leonik.net/dml/sec_svo30.py
Q2 engine d/l: https://www.leonik.net/dml/sec_q2.py
AGT project: https://www.leonik.net/dml/sec_agt.py
Atari page: http://www.leonik.net/dml/sec_atari.py
YT: https://www.youtube.com/@dmlTPT
BadMooD d/l: https://www.leonik.net/dml/sec_bm.py
SVO30 d/l: https://www.leonik.net/dml/sec_svo30.py
Q2 engine d/l: https://www.leonik.net/dml/sec_q2.py
AGT project: https://www.leonik.net/dml/sec_agt.py
Atari page: http://www.leonik.net/dml/sec_atari.py
YT: https://www.youtube.com/@dmlTPT
Re: Trying to fix Mikro's wrecked TT board
- Screenshot 2025-04-27 at 12.17.48.png (955.65 KiB) Viewed 326 times
d:m:l
BadMooD d/l: https://www.leonik.net/dml/sec_bm.py
SVO30 d/l: https://www.leonik.net/dml/sec_svo30.py
Q2 engine d/l: https://www.leonik.net/dml/sec_q2.py
AGT project: https://www.leonik.net/dml/sec_agt.py
Atari page: http://www.leonik.net/dml/sec_atari.py
YT: https://www.youtube.com/@dmlTPT
BadMooD d/l: https://www.leonik.net/dml/sec_bm.py
SVO30 d/l: https://www.leonik.net/dml/sec_svo30.py
Q2 engine d/l: https://www.leonik.net/dml/sec_q2.py
AGT project: https://www.leonik.net/dml/sec_agt.py
Atari page: http://www.leonik.net/dml/sec_atari.py
YT: https://www.youtube.com/@dmlTPT
Re: Trying to fix Mikro's wrecked TT board
Details, details, details!!!
Re: Trying to fix Mikro's wrecked TT board
- Screenshot 2025-04-27 at 12.37.31.png (654.77 KiB) Viewed 321 times
d:m:l
BadMooD d/l: https://www.leonik.net/dml/sec_bm.py
SVO30 d/l: https://www.leonik.net/dml/sec_svo30.py
Q2 engine d/l: https://www.leonik.net/dml/sec_q2.py
AGT project: https://www.leonik.net/dml/sec_agt.py
Atari page: http://www.leonik.net/dml/sec_atari.py
YT: https://www.youtube.com/@dmlTPT
BadMooD d/l: https://www.leonik.net/dml/sec_bm.py
SVO30 d/l: https://www.leonik.net/dml/sec_svo30.py
Q2 engine d/l: https://www.leonik.net/dml/sec_q2.py
AGT project: https://www.leonik.net/dml/sec_agt.py
Atari page: http://www.leonik.net/dml/sec_atari.py
YT: https://www.youtube.com/@dmlTPT
Re: Trying to fix Mikro's wrecked TT board
- Screenshot 2025-04-27 at 12.37.44.png (1.42 MiB) Viewed 321 times
\o/
d:m:l
BadMooD d/l: https://www.leonik.net/dml/sec_bm.py
SVO30 d/l: https://www.leonik.net/dml/sec_svo30.py
Q2 engine d/l: https://www.leonik.net/dml/sec_q2.py
AGT project: https://www.leonik.net/dml/sec_agt.py
Atari page: http://www.leonik.net/dml/sec_atari.py
YT: https://www.youtube.com/@dmlTPT
BadMooD d/l: https://www.leonik.net/dml/sec_bm.py
SVO30 d/l: https://www.leonik.net/dml/sec_svo30.py
Q2 engine d/l: https://www.leonik.net/dml/sec_q2.py
AGT project: https://www.leonik.net/dml/sec_agt.py
Atari page: http://www.leonik.net/dml/sec_atari.py
YT: https://www.youtube.com/@dmlTPT
Re: Trying to fix Mikro's wrecked TT board
So there is something wrong with that buffer IC.
With inputs low, outputs were not correct for TTL - less than 3V.
When I removed the IC and socketed it, I randomly tried it again (since I have not found a replacement yet) and the machine woke up unexpectedly, started booting GEM.
I have left it for a while and its started being flaky again but when I heated the IC with the soldering iron it's again booting GEM and outputs are 4.8V.
The IC seems to be damaged in some way, I'll need to find a replacement to confirm properly.
There is still something funny with the power-on reset sequence vs reset button - but I'll come back to that later. I need to figure out how to rig up storage so I can make sure the machine is mostly working.
I should also spend some time with the diagnostic cart now that the remaining ICs are restored.
...and the daughter board has not been tested yet either.
With inputs low, outputs were not correct for TTL - less than 3V.
When I removed the IC and socketed it, I randomly tried it again (since I have not found a replacement yet) and the machine woke up unexpectedly, started booting GEM.
I have left it for a while and its started being flaky again but when I heated the IC with the soldering iron it's again booting GEM and outputs are 4.8V.
The IC seems to be damaged in some way, I'll need to find a replacement to confirm properly.
There is still something funny with the power-on reset sequence vs reset button - but I'll come back to that later. I need to figure out how to rig up storage so I can make sure the machine is mostly working.
I should also spend some time with the diagnostic cart now that the remaining ICs are restored.
...and the daughter board has not been tested yet either.
d:m:l
BadMooD d/l: https://www.leonik.net/dml/sec_bm.py
SVO30 d/l: https://www.leonik.net/dml/sec_svo30.py
Q2 engine d/l: https://www.leonik.net/dml/sec_q2.py
AGT project: https://www.leonik.net/dml/sec_agt.py
Atari page: http://www.leonik.net/dml/sec_atari.py
YT: https://www.youtube.com/@dmlTPT
BadMooD d/l: https://www.leonik.net/dml/sec_bm.py
SVO30 d/l: https://www.leonik.net/dml/sec_svo30.py
Q2 engine d/l: https://www.leonik.net/dml/sec_q2.py
AGT project: https://www.leonik.net/dml/sec_agt.py
Atari page: http://www.leonik.net/dml/sec_atari.py
YT: https://www.youtube.com/@dmlTPT
Re: Trying to fix Mikro's wrecked TT board
@dml that's some awesome progress man! So good to see that little green desktop!
Re: Trying to fix Mikro's wrecked TT board
Gotta agree with Steve, well done @dmlSteve wrote: Sun Apr 27, 2025 2:11 pm @dml that's some awesome progress man! So good to see that little green desktop!
If it ain't broke, test it to Destruction.