Modification found in a 520STe : Keep or Cull?

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PeckPeekPoke
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Modification found in a 520STe : Keep or Cull?

Post by PeckPeekPoke »

I found this in an STe.
U211 has the chip visible stacked upon its back, plus the bodges.
Does anyone recognise this mod, and should I keep it?

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FOR GREAT JUSTICE. TAKE OUT EVERY ZIG
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Re: Modification found in a 520STe : Keep or Cull?

Post by exxos »

Same gets asked every few weeks, it's a factory bodge. Later STEs had those 3 chips on the MB. If you look in the motherboards forum for STE motherboards you will see the different revisions of boards.
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Re: Modification found in a 520STe : Keep or Cull?

Post by rubber_jonnie »

Yep, factory bodge, the white glue is a giveaway. Keep it.
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
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PeckPeekPoke
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Re: Modification found in a 520STe : Keep or Cull?

Post by PeckPeekPoke »

rubber_jonnie wrote: Tue Jul 05, 2022 9:00 am Yep, factory bodge, the white glue is a giveaway. Keep it.
I didn't think of the white glue. The sloppy soldering made it look DIY to me. This must've been one of those jobs done at 4:59PM.
FOR GREAT JUSTICE. TAKE OUT EVERY ZIG
800xl+U1mb, STfm, STe, 030
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Re: Modification found in a 520STe : Keep or Cull?

Post by rubber_jonnie »

PeckPeekPoke wrote: Tue Jul 05, 2022 3:21 pm
rubber_jonnie wrote: Tue Jul 05, 2022 9:00 am Yep, factory bodge, the white glue is a giveaway. Keep it.
I didn't think of the white glue. The sloppy soldering made it look DIY to me. This must've been one of those jobs done at 4:59PM.
I can't help but think Atari got through a lot of that white hot snot over the ST years :)
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
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Re: Modification found in a 520STe : Keep or Cull?

Post by ijor »

Anybody made a schematics about this patch? Or at least is it known what exactly it does?
http://github.com/ijor/fx68k 68000 cycle exact FPGA core
FX CAST Cycle Accurate Atari ST core
http://pasti.fxatari.com
czietz
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Re: Modification found in a 520STe : Keep or Cull?

Post by czietz »

ijor wrote: Wed Jul 06, 2022 2:52 am Anybody made a schematics about this patch? Or at least is it known what exactly it does?
https://exxosforum.co.uk/forum/viewtopi ... 191#p60191
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Re: Modification found in a 520STe : Keep or Cull?

Post by ijor »

czietz wrote: Wed Jul 06, 2022 6:46 am
ijor wrote: Wed Jul 06, 2022 2:52 am Anybody made a schematics about this patch? Or at least is it known what exactly it does?
https://exxosforum.co.uk/forum/viewtopi ... 191#p60191
Ah, the DMA sound interrupt. The whole design of that interrupt seems to be a quick patch.

Thanks Christian
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FX CAST Cycle Accurate Atari ST core
http://pasti.fxatari.com
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