Help resolving STE Booster instability?

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Maeke
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Re: Help resolving STE Booster instability?

Post by Maeke » Thu Oct 12, 2017 9:47 am

rubber_jonnie wrote:
Wed Oct 11, 2017 9:55 pm
Yeah, I was reading, I take it that was a late model STE with no socket?
That's exactly that.
If i take too long to reply, sorry my cat is sleeping on my laps.

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IngoQ
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Re: STE Booster instable

Post by IngoQ » Tue Oct 17, 2017 8:54 am

Hiya,

SIMMs arrived, tried them out, no change :(
exxos wrote:
Mon Oct 09, 2017 8:49 am
Only other thing is to make sure P100 resistor pack is 1.2K. Its near the front of the CPU/Blitter somewhere.
If I interpret M9-1-122J correctly, it is 9 pin, bussed, 1.2k with 5% tolerance.

When I have some spare time, I will recheck the soldering connections and see if 16MHz improves anything.

But I guess, the socket construction simply is crap and I will have to rethink my strategy :(
Ingo :geek:

“Perfection is achieved, not when there is nothing more to add, but when there is nothing left to take away.” - Antoine de Saint-Exupéry

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exxos
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Re: STE Booster instable

Post by exxos » Tue Oct 17, 2017 3:42 pm

IngoQ wrote:
Tue Oct 17, 2017 8:54 am
But I guess, the socket construction simply is crap and I will have to rethink my strategy :(
It doesn't take much to push the STE over the edge. A slight bit of noise in the wrong place and total chaos. Its why it takes me so long to debug boosters, its more like 1 day to design the things, then 6 months tracing why the thing isn't stable. Its even worse on the STFM :roll:.
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IngoQ
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Re: Help resolving STE Booster instability?

Post by IngoQ » Tue Oct 17, 2017 3:50 pm

Yep. And it sucks even more, when you have no scope. But I just sold a refurbished Amiga 500 for 210 EUR, so I guess next month I will be able to order my Rigol DS1054Z.

I guess it will not make much sense to continue searching for the cause, until I have the proper equipment. At least today my desoldering station arrived... a chinese cheapo, but I guess better than 2 km of solder wick ;)
Ingo :geek:

“Perfection is achieved, not when there is nothing more to add, but when there is nothing left to take away.” - Antoine de Saint-Exupéry

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