Arek's TF534 build

Post by **arkadiusz.makarenko** » Mon Sep 09, 2019 4:36 pm

YEY.

I removed and soldered small cpld and I did find the chain and managed to program both cpld.

Board was powered from RPi 3.3V, but this means that at least CPLDs at least partially work

Arek

Post by **8 Bit Dreams** » Mon Sep 09, 2019 6:56 pm

What does DiagROM say?

Post by **terriblefire** » Mon Sep 09, 2019 6:59 pm

Naah, those cplds die hard:)

agreed.. those CPLDs can take a pounding. They've got hardcore protection diodes on them for the 5V tolerance.

Post by **arkadiusz.makarenko** » Mon Sep 09, 2019 7:43 pm

8 Bit Dreams wrote: Mon Sep 09, 2019 6:56 pm What does DiagROM say?

Nothing yet, as I am waiting for regulator and relocator.
I should be able to tell anything more at the end of this week.

Post by **8 Bit Dreams** » Mon Sep 09, 2019 7:50 pm

I was sure ive sent You board with relocator? Not sure anymore.. Maybe ive mixed up, there was several persons from this Forum...

Post by **arkadiusz.makarenko** » Mon Sep 09, 2019 8:06 pm

8 Bit Dreams wrote: Mon Sep 09, 2019 7:50 pm I was sure ive sent You board with relocator? Not sure anymore.. Maybe ive mixed up, there was several persons from this Forum...

Yes you have, but I forgot to order connectors for it. So just ordered built one.
This one will wait till TF536 build

for my second Amiga.

Post by **arkadiusz.makarenko** » Wed Sep 11, 2019 1:38 pm

OK

Got my stuff.

And Diagrom starts to execute, because I can see some stuff on serial output.

Unfortunately it is garbage, as some letters from output are simply missed.
It does some stuff later, and I can see a lof of FAILS

But small steps forward will get there.

Any advice maybe which cpld I should focus on ? bus?

Another question is if this could be CPU related. I have 33mhz but 40mhz crystal?

Arek

Post by **8 Bit Dreams** » Wed Sep 11, 2019 7:07 pm

Nope, it's not CPU.
If You see fails - it is ram, so could be ram or big cpld..

Wed Sep 11, 2019 11:35 pm

Hi

Thank you for advice.
I have taken out RAM from the board, and I damaged bigger CPLD during check by pressing to hard on one of the legs. Oh well I knew that soldering this will be difficult, but it is much more difficult than expected!

Arek

Post by **arkadiusz.makarenko** » Fri Sep 13, 2019 5:23 pm

Ok. I give up on this board. I have lifted one pad.
I ordered new cplds and PCB and better flux.

It is great experience with smd and using hot air station. My goal with first board was too be able to run Diagrom, and I almost got there.

With next one I hope I will start computer.

exxos's Atari, Amiga & retro forum

Arek's TF534 build

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