TT and MSTe PSU
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TT and MSTe PSU
Hi,
I have seen a number of people add PicoPSU to falcons.
I am wondering what options there are for the TT and MSTe PSU, as it seems to have unusual voltage lines ... -5v anyone?
I've got an old motherboard, and I would like to fire it up.
Are there any simple methods?
I have seen a number of people add PicoPSU to falcons.
I am wondering what options there are for the TT and MSTe PSU, as it seems to have unusual voltage lines ... -5v anyone?
I've got an old motherboard, and I would like to fire it up.
Are there any simple methods?
My company website http://www.thebigconsultant.com[/i][/color]
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- Atari Super Hero
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- Location: California / USA
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Re: TT and MSTe PSU
I've build a small PCB to use a Pico-PSU and added a 7905 to generate the -5V from the -12V.
I can provide the Eagle file if interested.You do not have the required permissions to view the files attached to this post.
Falcon + AB040 + Eclipse PCI + ATI Rage VGA card + NE2000 Ethernec + HxC Floppy Emulator
MegaSTE 4MB + CosmosEx / 1040 STF for hardware dev
http://www.rti-zone.org/atari.php
MegaSTE 4MB + CosmosEx / 1040 STF for hardware dev
http://www.rti-zone.org/atari.php
Re: TT and MSTe PSU
Great,
I have a friend who might be able to help me make this.
I'm so glad that its possible!
Would it be possible to send the file?!
Many thanks! ... I'll take photos of the final result!!
Kind regards,
John
I have a friend who might be able to help me make this.
I'm so glad that its possible!
Would it be possible to send the file?!
Many thanks! ... I'll take photos of the final result!!
Kind regards,
John
My company website http://www.thebigconsultant.com[/i][/color]
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- Atari Super Hero
- Posts: 514
- Joined: Wed Jun 29, 2011 6:39 am
- Location: California / USA
- Contact:
Re: TT and MSTe PSU
I just got the PCBs back so I'm going to test this during the weekend and if all works fine I'll post the files.
Regards, Rodolphe
Regards, Rodolphe
Falcon + AB040 + Eclipse PCI + ATI Rage VGA card + NE2000 Ethernec + HxC Floppy Emulator
MegaSTE 4MB + CosmosEx / 1040 STF for hardware dev
http://www.rti-zone.org/atari.php
MegaSTE 4MB + CosmosEx / 1040 STF for hardware dev
http://www.rti-zone.org/atari.php
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- Atari Super Hero
- Posts: 514
- Joined: Wed Jun 29, 2011 6:39 am
- Location: California / USA
- Contact:
Re: TT and MSTe PSU
So .. it works 
Here is a picture of it in a TT before I close the PSU enclosure : I changed the fan for a silent fan ( https://smile.amazon.com/gp/product/B00 ... 00?ie=UTF8 ).
The board accepts 20 and 24 pin ATX Pico PSU.
I re-used the original switch and just rewire it to use as the /PS_ON signal.
I'm attaching the Eagle files for those who want to make their own.
Regards, Rodolphe

Here is a picture of it in a TT before I close the PSU enclosure : I changed the fan for a silent fan ( https://smile.amazon.com/gp/product/B00 ... 00?ie=UTF8 ).
The board accepts 20 and 24 pin ATX Pico PSU.
I re-used the original switch and just rewire it to use as the /PS_ON signal.
I'm attaching the Eagle files for those who want to make their own.
Regards, Rodolphe
You do not have the required permissions to view the files attached to this post.
Falcon + AB040 + Eclipse PCI + ATI Rage VGA card + NE2000 Ethernec + HxC Floppy Emulator
MegaSTE 4MB + CosmosEx / 1040 STF for hardware dev
http://www.rti-zone.org/atari.php
MegaSTE 4MB + CosmosEx / 1040 STF for hardware dev
http://www.rti-zone.org/atari.php
Re: TT and MSTe PSU
This is beautiful!! ...
Wonderful job!
Wonderful job!
My company website http://www.thebigconsultant.com[/i][/color]
Re: TT and MSTe PSU
Hi,rpineau wrote:So .. it works
Here is a picture of it in a TT before I close the PSU enclosure :
PicoPSU_TT.jpg
I changed the fan for a silent fan ( https://smile.amazon.com/gp/product/B00 ... 00?ie=UTF8 ).
The board accepts 20 and 24 pin ATX Pico PSU.
I re-used the original switch and just rewire it to use as the /PS_ON signal.
I'm attaching the Eagle files for those who want to make their own.
Regards, Rodolphe
Very impressive. You mentioned PCBs in your previous post. I would be willing to buy one from you if you have several. Even if you didn't, how much would you charge for building me one? It's just that I'm so swamped with stuff that I couldn't possible have time to build it myself. Thanks.
Re: TT and MSTe PSU
Could this be modded for PicoPSU and TT?: http://www.ebay.com/itm/ATX-20-PIN-to-A ... 1025150787
Re: TT and MSTe PSU
No need to modify it, the TT PSU connector is a standard AT connector. Just don't insert it backwardsGaiyan wrote:Could this be modded for PicoPSU and TT?: http://www.ebay.com/itm/ATX-20-PIN-to-A ... 1025150787

Jo Even
VanillaMiNT - Falcon060 - Milan060 - Falcon040 - MIST - Mega STE - Mega ST - STM - STE - Amiga 600 - Sharp MZ700 - MSX - Amstrad CPC - C64
VanillaMiNT - Falcon060 - Milan060 - Falcon040 - MIST - Mega STE - Mega ST - STM - STE - Amiga 600 - Sharp MZ700 - MSX - Amstrad CPC - C64
Re: TT and MSTe PSU
Oh, I see! Thanks!joska wrote:No need to modify it, the TT PSU connector is a standard AT connector. Just don't insert it backwardsGaiyan wrote:Could this be modded for PicoPSU and TT?: http://www.ebay.com/itm/ATX-20-PIN-to-A ... 1025150787
Re: TT and MSTe PSU
Ok, I just ordered the adapter from eBay. I withdraw my request to Rodolphe.
Will a 120W PicoPSU suffice for a TT? Eventually when Thunder & Storm are released I will be using an internal SD card.
Will a 120W PicoPSU suffice for a TT? Eventually when Thunder & Storm are released I will be using an internal SD card.
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- Atari Super Hero
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Re: TT and MSTe PSU
I use a 120W Pico PSU on the TT and no problem so far.
The original TT/MSTE PSU are 64.6W so you should be good even if you add a lot of things to it.
Rodolphe
The original TT/MSTE PSU are 64.6W so you should be good even if you add a lot of things to it.
Rodolphe
Falcon + AB040 + Eclipse PCI + ATI Rage VGA card + NE2000 Ethernec + HxC Floppy Emulator
MegaSTE 4MB + CosmosEx / 1040 STF for hardware dev
http://www.rti-zone.org/atari.php
MegaSTE 4MB + CosmosEx / 1040 STF for hardware dev
http://www.rti-zone.org/atari.php
Re: TT and MSTe PSU
Good to know, thanks.rpineau wrote:I use a 120W Pico PSU on the TT and no problem so far.
The original TT/MSTE PSU are 64.6W so you should be good even if you add a lot of things to it.
Rodolphe
Based on my brief but thorough research, I have decided to get the PicoPSU-120-WI-25 model that accepts 12-25v DC bricks. According to JonnyGuru by far the best performance was with a 19v brick.
Re: TT and MSTe PSU
Interesting, what are the odd voltages for? I have used a Pico PSU with ATX->AT adapter in both MSTe and TT with no problems. The only problem I had is that one of my two Mach 64 ISA video cards (Nova VME) did not work with the Pico PSU and only worked with stock PSU.
Re: TT and MSTe PSU
If i remember correctly, -5V was required by the ISA bus amongst others to work correctly. Sound cards wouldn't work properly without the negative voltage. That might be why the Nova didn't work in your case.piku wrote:Interesting, what are the odd voltages for? I have used a Pico PSU with ATX->AT adapter in both MSTe and TT with no problems. The only problem I had is that one of my two Mach 64 ISA video cards (Nova VME) did not work with the Pico PSU and only worked with stock PSU.
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- Atari Super Hero
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Re: TT and MSTe PSU
The -5V is used by the DAC0802 in the Mega STE and TT. It might be used in other places.
Falcon + AB040 + Eclipse PCI + ATI Rage VGA card + NE2000 Ethernec + HxC Floppy Emulator
MegaSTE 4MB + CosmosEx / 1040 STF for hardware dev
http://www.rti-zone.org/atari.php
MegaSTE 4MB + CosmosEx / 1040 STF for hardware dev
http://www.rti-zone.org/atari.php
Re: TT and MSTe PSU
Please forgive my lack of technical prowess. I purchased the above AT converter. When I examined the TT PSU AT connector I counted 11 wires. The converter above has 12 wires.joska wrote:No need to modify it, the TT PSU connector is a standard AT connector. Just don't insert it backwardsGaiyan wrote:Could this be modded for PicoPSU and TT?: http://www.ebay.com/itm/ATX-20-PIN-to-A ... 1025150787
What do I do about this extra wire ? 5V ? on the converter? Will this harm my TT or my MSTE?
Thanks for teaching / sharing.
You do not have the required permissions to view the files attached to this post.

BAMA
Re: TT and MSTe PSU
If I'm not mistaken I thought the pin for this missing wire is missing from the board as well.
Re: TT and MSTe PSU
Don't worry, it's +5V on both the TT and AT connector. I guess it's not used by the TT PSU simply because it's not needed.
Jo Even
VanillaMiNT - Falcon060 - Milan060 - Falcon040 - MIST - Mega STE - Mega ST - STM - STE - Amiga 600 - Sharp MZ700 - MSX - Amstrad CPC - C64
VanillaMiNT - Falcon060 - Milan060 - Falcon040 - MIST - Mega STE - Mega ST - STM - STE - Amiga 600 - Sharp MZ700 - MSX - Amstrad CPC - C64
Re: TT and MSTe PSU
Those of you who have been using a Pico PSU, what problems (if any) have developed? I am all set to make the conversion but I just read some old warnings by Exxos. I purchased the parts in Gayian’s post that the review said were the best... my lack of experience makes me wary with my prized TT & MSTE.
Thanks
Thanks

BAMA
Re: TT and MSTe PSU
Everything works fine for me with the raw machine using the 80watt 12volt variant, but I've found that half of Mach64 cards with nova adapter do not work with pico psu but do work fine with the stock psu. I just got my TT running though that has ethernec and nova with mach64 all working fine on PicoPSU with the ATX to AT adapter plugged in correctly.
All I have to say is be very very careful with this work. I've fried a coldfire dev board, a CTPCI and a mega ste motherboard with past carelessness over the years. Now I am ultra ultra careful and really take my time and no incidents in the last few years. Fingers crossed of course!
All I have to say is be very very careful with this work. I've fried a coldfire dev board, a CTPCI and a mega ste motherboard with past carelessness over the years. Now I am ultra ultra careful and really take my time and no incidents in the last few years. Fingers crossed of course!
Re: TT and MSTe PSU
Many PicoPSU clones does not have -5 or -12, which the isa graphics card may need. That said, I have only good experiences with PicoPSU. I've used them in several machines with good results. I would be surprised if they were any worse than the original, 80's design PSU's.
Jo Even
VanillaMiNT - Falcon060 - Milan060 - Falcon040 - MIST - Mega STE - Mega ST - STM - STE - Amiga 600 - Sharp MZ700 - MSX - Amstrad CPC - C64
VanillaMiNT - Falcon060 - Milan060 - Falcon040 - MIST - Mega STE - Mega ST - STM - STE - Amiga 600 - Sharp MZ700 - MSX - Amstrad CPC - C64
Re: TT and MSTe PSU
Can you tell by sight which Mach 64 cards won’t work with the Pico?piku wrote:Everything works fine for me with the raw machine using the 80watt 12volt variant, but I've found that half of Mach64 cards with nova adapter do not work with pico psu but do work fine with the stock psu. I just got my TT running though that has ethernec and nova with mach64 all working fine on PicoPSU with the ATX to AT adapter plugged in correctly.
What safety tips do you recommend to protect my computer?piku wrote:All I have to say is be very very careful with this work. I've fried a coldfire dev board, a CTPCI and a mega ste motherboard with past carelessness over the years. Now I am ultra ultra careful and really take my time and no incidents in the last few years. Fingers crossed of course!

BAMA
Re: TT and MSTe PSU
If i recall they were identical cards for the most part. Maybe different ramdac.
Re: TT and MSTe PSU
Haven't had a single problem. I'm also running SuperNova ATI Mach64 as well. I have -5v from the link I gave earlier to eBay.Bama wrote:Those of you who have been using a Pico PSU, what problems (if any) have developed? I am all set to make the conversion but I just read some old warnings by Exxos. I purchased the parts in Gayian’s post that the review said were the best... my lack of experience makes me wary with my prized TT & MSTE.
Thanks