Terrible Fire Accelerators

[seuden]

Originally Posted by plasmab

@silverfox0786's

This the same guy? http://www.ukvac.com/forum/user-silv...pic354598.html

[plasmab]

Originally Posted by seuden

This the same guy? http://www.ukvac.com/forum/user-silv...pic354598.html

Thats him. He ranted at me that he had paid for the logo and that meant "fully supported". I told him that with that attitude he could f right off. He then told me he hoped my business was going to fail for being such a con artist (and a c*nt). I make £2 per blank board on ebay. It barely buys me a beer per week. It essentially took the edge off the research costs of designing boards. I will never break even on the TF project.

[Chucky]

there are always some damn idiot.. just tell that person the F word. grab a beer and ignore..

[supaduper]

@ Steve you have a Fan base..... all he has IS a Fan base !!

[plasmab]

The TF534 4 layer boards are here. Will be a while before i get to them

[Amiga1992]

Originally Posted by plasmab

Thats him. He ranted at me that he had paid for the logo and that meant "fully supported". I told him that with that attitude he could f right off. He then told me he hoped my business was going to fail for being such a con artist (and a c*nt).

LOL it seems the con artist is him, what an irony.

[plasmab]

Built the TF534 Rev 2b... 4 layer board. Running perfectly with no decoupling caps added.

[kgc210]

Originally Posted by plasmab

Built the TF534 Rev 2b... 4 layer board. Running perfectly with no decoupling caps added.

Nice

I really need get round to trying the SD Card and VS1053 on the SPI port (REV3). But a bit snowed under.

[plasmab]

Originally Posted by kgc210

Nice

I really need get round to trying the SD Card and VS1053 on the SPI port (REV3). But a bit snowed under.

Same here but found enough time to build the 2b. Works perfectly on the 500.

[8 Bit Dreams]

A500 got a lot of new accelerators:
HC508
TF530
TF534
Wicher
68030 TK
ACA500+
it's time to make A2000 geat again!

PS
Forgot to report to Chucky - there is indeed a bug in DiagROM v.1.0 just as Stephen said - stumbled on it while tried to debug one of the 68030 TK 4MB cards! Thanks to Keirf for he's Systest, helped me a lot to move further

[plasmab]

Someone else can make the A2000 great. Not me.

[Chucky]

Originally Posted by 8 Bit Dreams

PS
Forgot to report to Chucky - there is indeed a bug in DiagROM v.1.0 just as Stephen said - stumbled on it while tried to debug one of the 68030 TK 4MB cards! Thanks to Keirf for he's Systest, helped me a lot to move further

Autoconfigbug? the new daily should have that fixed.

[plasmab]

Ok im very happy with the new board. Runs at 40Mhz with no decoupling caps and its solid stable. Not one random crash yet.

[8 Bit Dreams]

Originally Posted by plasmab

Ok im very happy with the new board. Runs at 40Mhz with no decoupling caps and its solid stable. Not one random crash yet.

So it basically confirms that so complicated boards like this should be 4-layers..
it's good to know.

[plasmab]

Originally Posted by 8 Bit Dreams

So it basically confirms that so complicated boards like this should be 4-layers..
it's good to know.

I think thats an over simplistic statement. there are many changes on the TF534 for signal integrity. One of which was 4 layers.

[nogginthenog]

Silly question from an electronics amateur: You don't need decoupling caps because you have ground plane right?

[kgc210]

Only had like two mins to test earlier.

Ran tf530sdtest and got his


Ran tf530sdopen but got this


tf530sd.device was in devs though.

Will try again later when I got more time.

[plasmab]

Originally Posted by nogginthenog

Silly question from an electronics amateur: You don't need decoupling caps because you have ground plane right?

Again its not that simple. I dont think the ground plane is the only factor. I've rerouted the clocks into a different topology. I've measured the reflections at all stages of the build and they're significantly better than the TF530. (EDIT: I also spice modelled the reflections until i was happy).

I've also kept data lines away from the JTAG lines.. sorted many crosstalk issues and a few other bits and pieces.

You definitely need the decoupling caps but you shouldnt see repeatable errors without them. Noise related errors are random. A repeatable error means there is a non-random factor.

[CRP]

Hi, I just assembled a TF530 using a rev3 board. This is the first time I assembled an SMD project, but for now hopefully I have not made stupid errors.
I have been able to successfully program the CPLDs using a Raspberry PI, no error messages there. When I install the board in an otherwise perfectly working A500 rev 6a board, I am stuck at a black screen.
I read on the wiki that I should check bus cpld, resistor networks, clock and cpu. But I have a few questions first:
1) I installed a 25 MHz oscillator: do I need to modify jed files to take this speed into account before programming the CPLDs or can I use those on github as is?
2) if I am able to program the CPLDs, can I safely assume that CPLD and voltage regulator solder points are fine?
3) which are the best points on the board to check clock while it is connected?
4) can I leave the 68882 out when testing or does it need to be inserted?

I am waiting to receive a batch of eproms to program myself a diagrom, any other diagnostic suggestions apart from the above that I can try meanwhile?

Thanks for any help

[Chucky]

yes you can run w/o fpu. so do that.

and have a look on the LED! does it change brightness.. (this is something I use as a mantra. as everyone seems to skip this IMPORTANT part of amiga troubleshooting)