Ordering the Alpha board

All information relating to the Alpha plus all the WIP threads etc.
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exxos
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Ordering the Alpha board

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Re: Ordering the Alpha board

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I would buy one but I have no electronic skills
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Re: Ordering the Alpha board

Post by Atarian Computing »

Do we source components from donors? As in the special chips?
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Re: Ordering the Alpha board

Post by rubber_jonnie »

Atarian Computing wrote: Tue Jul 31, 2018 12:11 pm Do we source components from donors? As in the special chips?
Yeah, you're going to need a donor board of some sort.
Collector of many retro things!
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Re: Ordering the Alpha board

Post by Atarian Computing »

rubber_jonnie wrote: Tue Jul 31, 2018 12:22 pm
Atarian Computing wrote: Tue Jul 31, 2018 12:11 pm Do we source components from donors? As in the special chips?
Yeah, pretty sure you're going to need a donor board of some sort.
No worries, got several. And some NOS chips.
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Re: Ordering the Alpha board

Post by rubber_jonnie »

Atarian Computing wrote: Tue Jul 31, 2018 12:24 pm No worries, got several. And some NOS chips.
Likewise. I have one board in particular in mind, which will donate it's body for science :)
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: Ordering the Alpha board

Post by Atarian Computing »

exxos wrote: Tue Jul 31, 2018 11:41 am Snip
Do you have a BOM readily available perhaps?
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Re: Ordering the Alpha board

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I have a BOM, not checked all parts yet, but will upload it at a later date.

Will need a donor ST for man parts such as , MMU, GLUE, Shifter etc, other parts like MFP, 1772, I do stock in my store, but a whole spare donor ST will have all parts.

The circuit isn't identical, example needs a Falcon RAM card (1MB or 4MB), PLCC 68000..

Other parts are generic resistors and capacitors etc which should be easy to obtain from any half decent supplier.
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Re: Ordering the Alpha board

Post by rubber_jonnie »

Hmm, so I guess I'm seeing SMD type PLCC sockets on the board?

If so then I'm going to have to get some sort of hot air soldering practise in, since I don't have an oven!!

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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: Ordering the Alpha board

Post by exxos »

rubber_jonnie wrote: Tue Jul 31, 2018 12:53 pm Hmm, so I guess I'm seeing SMD type PLCC sockets on the board?
???

Normal PLCC sockets (not funky ones either, just normal PLCC sockets).
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
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