Woohoo! :D
So it just decided to work after all.
Trying to fix Mikro's wrecked TT board
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CiH
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Re: Trying to fix Mikro's wrecked TT board
"We're the Maggie Team and we haven't had any dinner!"
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Cyprian
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Re: Trying to fix Mikro's wrecked TT board
just wow, awesome
well done @dml
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http://260ste.atari.org
DDD HDD / AT Speed C16 / TF536 / SDrive / PAK68/3 / Lynx Multi Card / LDW Super 2000 / XCA12 / SkunkBoard / CosmosEx / SatanDisk / UltraSatan / USB Floppy Drive Emulator / Eiffel / SIO2PC / Crazy Dots / PAM Net
http://260ste.atari.org
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viking272
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Re: Trying to fix Mikro's wrecked TT board
Terrific work!
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rubber_jonnie
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Re: Trying to fix Mikro's wrecked TT board
Good work!!
:girldance:
:girldance:
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
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dml
- Posts: 842
- Joined: 15 Nov 2017 22:11
Re: Trying to fix Mikro's wrecked TT board
Thanks everyone - a lot of luck involved with all the important bits already mostly OK, if a bit crunchy. Still happy to see it wake up though :)
I noticed Jookie mentioned something in the other TT thread about the reset circuit startup sequence with the POWER_GOOD supply signal - not starting from cold but waking on a reset. I'll need to read through it again more carefully for clues on that one.
I noticed Jookie mentioned something in the other TT thread about the reset circuit startup sequence with the POWER_GOOD supply signal - not starting from cold but waking on a reset. I'll need to read through it again more carefully for clues on that one.
d:m:l
BadMooD d/l: https://www.leonik.net/dml/sec_bm.py
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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
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mikro
- Posts: 820
- Joined: 28 Aug 2017 23:22
- Location: Kosice, Slovakia
Re: Trying to fix Mikro's wrecked TT board
Great to see the board alive!
So what is the moral story of all this? Broken reset button and flaky buffer IC? (and maybe massaging the filed corner?)
So what is the moral story of all this? Broken reset button and flaky buffer IC? (and maybe massaging the filed corner?)
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dml
- Posts: 842
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Re: Trying to fix Mikro's wrecked TT board
So far that's about the size of it.mikro wrote: 28 Apr 2025 11:49 So what is the moral story of all this? Broken reset button and flaky buffer IC? (and maybe massaging the filed corner?)
I replaced some sketchy IC sockets of course and added the missing ACIA - a few of the ICs are not original but temporary, still to put the originals back - and the temporary CPU of course instead of the daughter board.
I expect the actual problems preventing booting have been resolved though. I'll know for sure when I put all the original pieces back and then try to mount some storage and actually use it.
BTW I thought the TT would not boot without FPU? It seems to have reached the desktop before I installed one... or does it depend on TOS revision? Or something else?
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
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stephen_usher
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Re: Trying to fix Mikro's wrecked TT board
Well done.
As for booting without an FPU, better check the OS sources.
Stuffing TOS 3.06 in would be useful as you'll see the memory check almost immediately and not just a white screen until it's finished.
As for booting without an FPU, better check the OS sources.
Stuffing TOS 3.06 in would be useful as you'll see the memory check almost immediately and not just a white screen until it's finished.
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
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Badwolf
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Re: Trying to fix Mikro's wrecked TT board
Back of the net!
:cheer:
BW
:cheer:
BW
DFB1 Open source 50MHz 030 and TT-RAM accelerator for the Falcon
Smalliermouse ST-optimised USB mouse adapter based on SmallyMouse2
FrontBench The Frontier: Elite 2 intro as a benchmark
Smalliermouse ST-optimised USB mouse adapter based on SmallyMouse2
FrontBench The Frontier: Elite 2 intro as a benchmark
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mikro
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Re: Trying to fix Mikro's wrecked TT board
That is a very good question. I see an fmove pretty early on even in TOS 3.00.dml wrote: 28 Apr 2025 12:13BTW I thought the TT would not boot without FPU? It seems to have reached the desktop before I installed one... or does it depend on TOS revision? Or something else?
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