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Re: TF534 on CDTV

Posted: 27 Jan 2019 13:47
by terriblefire
Forgottenmyname wrote: 27 Jan 2019 13:33 Top tip, that explains the adaptors sold on eBay then?
Which adapters? The Keirf ones? They're for the 27C400/800s.. i have that one but its not the right adaptor for these roms.

Re: TF534 on CDTV

Posted: 27 Jan 2019 14:19
by PhilC
Ah ok, just be getting it confused with that as I need to get one of those adaptors too

Re: TF534 on CDTV

Posted: 28 Jan 2019 20:33
by terriblefire
So went to finish this installation tonight and I appear to be a component short in the kit. Entirely possible that I sneezed it into one of the machines here but i've hunted high and low for an hour and no sign of it.. :(

CDTV is now in a sad state of dismantlement... hope i can get it back together soon or it'll end up in the loft forever.

Re: TF534 on CDTV

Posted: 04 Feb 2019 10:56
by terriblefire
I put the CDTV back together but it doesn’t boot. A quick nosey on the LA tells me 0 is getting returned when accessing address 4. Address bus doesn’t appear to be shorted. Sigh.

And it’s not the ROM either. Tried 3.

Re: TF534 on CDTV

Posted: 04 Feb 2019 20:37
by terriblefire
Looks like the lower data bus latches are fried... grrr.

Re: TF534 on CDTV

Posted: 05 Feb 2019 15:28
by terriblefire
From what i can tell U46 died. Maybe an ESD death. This a common thing?

Re: TF534 on CDTV

Posted: 06 Feb 2019 06:50
by 8 Bit Dreams
terriblefire wrote: 05 Feb 2019 15:28 From what i can tell U46 died. Maybe an ESD death. This a common thing?
Have a good chap who has CDTV spares, will try to find U46 for You

Re: TF534 on CDTV

Posted: 06 Feb 2019 07:56
by terriblefire
Already ordered. Just wondering what will break next. All I was trying to do was replace the power switch and it’s become a rabbit hole

EDIT: U46 is one of these https://www.rapidonline.com/Texas-Instr ... gn=soluteN

Re: My CDTV Nightmare

Posted: 07 Feb 2019 19:11
by terriblefire
U46 removed
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Re: My CDTV Nightmare

Posted: 07 Feb 2019 20:49
by terriblefire
Ok chip replaced and same behaviour. Upper half of data bus reads at location 0. Lower half does not. Always zero... which is mental when you consider the latches and OEs are connected.

Anyways.... I’m fed up with the CDTV. It’s going in the loft. Might sell it for parts. :(