Old TT motherboard restoration

General discussions or ideas about hardware.
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stephen_usher
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Re: Old TT motherboard restoration

Post by stephen_usher »

It shouldn't crash without termination, merely not see anything. Sounds like your SCSI controller chip is probably fried.
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.
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frank.lukas
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Re: Old TT motherboard restoration

Post by frank.lukas »

Use the NVRam Soft from Uwe Seimet (HDDriver) to set the machine (TT) SCSI ID to 7.
mgi
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Re: Old TT motherboard restoration

Post by mgi »

Will try and if not I guess new SCSI chip?
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frank.lukas
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Re: Old TT motherboard restoration

Post by frank.lukas »

You need a 6V NVRam Battery for the Mainboard ...

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stephen_usher
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Re: Old TT motherboard restoration

Post by stephen_usher »

4x AAA batteries in a holder works wonderfully (and cheaply).

The TT will run without one, or at least mine did for a while.
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.
mgi
Posts: 117
Joined: Sun Jun 06, 2021 4:37 pm

Re: Old TT motherboard restoration

Post by mgi »

Well, I plugged again external SCSI HDD and added terminator at its end as I happened to have one and it works. I can run Mint and no surprises as of yet. I plugged the battery but 3.5V - seems to be holding watch and date - should I change it?

Big thanks - process ongoing
Michal
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