Project: HDMI/DVI out for STFM

Progress on our FPGA cores.
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Icky
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Re: Project: HDMI/DVI out for STFM

Post by Icky »

Thanks @exxos for sending over the boards from the manufacturer. Comparing to the older board size its a lot slimmed down and we have managed to pack in the audio codec / mixer chip as well. In addition the Micro-JTAG boards https://www.exxosforum.co.uk/forum/viewt ... =10#p44580 were also in the the batch.

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Now I just need to find some Atari time which has become very scarce over the last month or so to build these :(

Am not looking forward to having a go at the MBGA chip but its going to be an adventure no doubt.
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Icky
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Re: Project: HDMI/DVI out for STFM

Post by Icky »

Well thats the easy side SMT components soldered using the higher temp solder paste. Just a little clean up needed as I have spotted a couple of solder bridges.

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Icky
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Re: Project: HDMI/DVI out for STFM

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Well that wasn't fun and must be the smallest, most dense work (MBGA) I have done so far. Just need to give it a clean and then see if it works or ends up in :fire:

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PhilC
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Re: Project: HDMI/DVI out for STFM

Post by PhilC »

@Icky nicely done. Hope all well under that BGA chip.

Look forward to seeing if it works or not :D
If it ain't broke, test it to Destruction.
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Re: Project: HDMI/DVI out for STFM

Post by Icky »

@PhilC - no joy yet and no :fire:. Have checked for shorts and their aren't any but it isn't programming at the moment so am suspecting the MBGA soldering.
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Re: Project: HDMI/DVI out for STFM

Post by rubber_jonnie »

Oooh, BGA, nasty.
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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Icky
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Re: Project: HDMI/DVI out for STFM

Post by Icky »

rubber_jonnie wrote: Sun Aug 30, 2020 3:33 pm Oooh, BGA, nasty.
Yep - I thought it was time to experiment with these packages as they are cheaper. @exxos suggested we need an x-ray machine to add to our arsenal of tools :)
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Re: Project: HDMI/DVI out for STFM

Post by rubber_jonnie »

Icky wrote: Sun Aug 30, 2020 5:12 pm
rubber_jonnie wrote: Sun Aug 30, 2020 3:33 pm Oooh, BGA, nasty.
Yep - I thought it was time to experiment with these packages as they are cheaper. @exxos suggested we need an x-ray machine to add to our arsenal of tools :)
Or an army of nano-bots that can clamber underneath and eat any shorts (Simpsons reference there!)

How many 'pins' does it have? I assume you must have to have a pretty accurate stencil to get the solder as you need 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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Icky
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Re: Project: HDMI/DVI out for STFM

Post by Icky »

@rubber_jonnie - 153 pins. The stencil worked and looking at the pads they all had paste on each pad and not too much.
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Re: Project: HDMI/DVI out for STFM

Post by stephen_usher »

Aren't those packages designed to be fitted using machines which vibrate the chip very quickly, friction melting the solder?
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
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