4mb upgrade possible on this 1040 STFM?

Upgrade your RAM from ST to Falcon.
grinoir
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4mb upgrade possible on this 1040 STFM?

Post by grinoir »

Hi all of you
It saddens me to see that my motherboard don’t provide me with an easy way to upgrade my ram to 4mb.
Is it possible in some way? How?

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exxos
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Re: 4mb upgrade possible on this 1040 STFM?

Post by exxos »

Yep. But sadly out of stock currently.

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https://www.exxosforum.co.uk/atari/store2/#0020
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 ?
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rubber_jonnie
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Re: 4mb upgrade possible on this 1040 STFM?

Post by rubber_jonnie »

You could use one of these:https://www.exxosforum.co.uk/atari/store2/#0035 or search on eBay for a Marpet RAM/SIMM upgrade for ST.
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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exxos
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Re: 4mb upgrade possible on this 1040 STFM?

Post by exxos »

rubber_jonnie wrote: Thu Oct 21, 2021 6:46 pm You could use one of these:https://www.exxosforum.co.uk/atari/store2/#0035 or search on eBay for a Marpet RAM/SIMM upgrade for ST.
He has SMT MMU - so can't use #0035 or Marpet (yuck!) .
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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rubber_jonnie
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Re: 4mb upgrade possible on this 1040 STFM?

Post by rubber_jonnie »

exxos wrote: Thu Oct 21, 2021 6:51 pm
rubber_jonnie wrote: Thu Oct 21, 2021 6:46 pm You could use one of these:https://www.exxosforum.co.uk/atari/store2/#0035 or search on eBay for a Marpet RAM/SIMM upgrade for ST.
He has SMT MMU - so can't use #0035 or Marpet (yuck!) .
Oh yeah, well spotted and yuck indeed!!
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...
grinoir
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Joined: Thu Oct 21, 2021 4:14 pm

Re: 4mb upgrade possible on this 1040 STFM?

Post by grinoir »

Thanks exxos,
Will it be back in Stock? If so is there a timeframe?
Is it a hard installation, should I get another computer?
I do not own a desoldering station only a tin sucker.
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exxos
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Re: 4mb upgrade possible on this 1040 STFM?

Post by exxos »

They will be in stock again but not sure when. But it is difficult to fit, so you may want to get someone to fit it for you.

Some more info here https://www.exxosforum.co.uk/atari/last/4mb/index.htm
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.
grinoir
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Joined: Thu Oct 21, 2021 4:14 pm

Re: 4mb upgrade possible on this 1040 STFM?

Post by grinoir »

Thank you. I think that I can do that. I need this!
I will check back in your store
Thanks
troed
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Re: 4mb upgrade possible on this 1040 STFM?

Post by troed »

grinoir wrote: Fri Oct 22, 2021 2:14 am Thank you. I think that I can do that. I need this!
Desoldering the old RAM chips is a _lot_ of work. I would be hesitant to do it with just a solder sucker, esp. if you haven't done it a lot already. My first choice is a proper desoldering gun, and the second (much more risky) is a hot air station where you simply lift the ICs up when all the solder has melted. The second trick is fast, but has a non-zero risk of frying the motherboard a bit.

Installing the replacement RAM board once the chips are out and you've cleaned the holes from old solder is relatively easy even with just casual soldering experience and equipment.
krs
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Re: 4mb upgrade possible on this 1040 STFM?

Post by krs »

Also worth noting is that on the 80-pin SMD MMU the MAD9 pin is pin 66 instead of pin 64 as on the socketed MMU, and you have to solder the wire directly to the leg of the chip. I'm about to perform this upgrade myself but I'm waiting for a desoldering station that I ordered, because I sure as hell ain't removing 32 16-legged chips with desoldering braid and solder sucker!
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