STE V1.5 32MHz BOOSTER - STATUS
Re: STE V1.5 32MHz BOOSTER - STATUS
Must have been running 30+ hours constantly now and got to loop 461. So must have been a bad solder joint or bad PCB on the previous board.. So looks like all is well in the world again
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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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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.
Re: STE V1.5 32MHz BOOSTER - STATUS
So a bit more chaos today..
I had on the board 2x220R (normal wire ended types ) resistors on the buffer input and this is what was working fine. So I change this for a normal 100R 1206, and it crashed after about 30 seconds obviously the system should not be that critical over just a few ohms.. So I had a little bit more investigation to do..
Cut a long story short, I think just a tiny bit of noise on the 40MHz line is enough to cause problems.. The input value resistor to the buffer seemed overcritical in all my previous tests and of course this was proven again today. I tried a lot of things, there was seems to work is simply placing a 22pF capacitor on the buffer input. Now I am going via a 33R resistor and it all seems fine again.
I'm using a schmitt buffer, so it should filter out all sorts of noise and glitches. Obviously there is something else going on which it is not filtering out. It's not relating to minimum or maximum voltages as I did a lot of experimenting with that this morning. Even altering DC offset levels etc..
In any case, I will update the PCB design to include this capacitor.. I will leave the board on testing throughout today again to make sure's works.. I'm not too worried about investigating this issue.. If I investigate every tiny little thing the project will never move forward..
In relation to the dualtos boards, where currently I am soldering on the ROM directly onto the PCB.. The problem is that I wanted to keep stock of the ROM's separately in order to keep costs down a lot. It is not really practical to build up 20 of each language.. It's why I put a lot of the current boards (with sockets) built up, so I can keep a large stock of them, I just program low quantity of ROMs as needed. But obviously this would be a huge problem if I went to solder all the ROM's onto the new PCBs...
So I'm going to order a few SMT sockets and see if these are better than the larger through-hole sockets.. I don't have any spare boards, so I will have to order some more, so it could be some time before updating relation to those...
I had on the board 2x220R (normal wire ended types ) resistors on the buffer input and this is what was working fine. So I change this for a normal 100R 1206, and it crashed after about 30 seconds obviously the system should not be that critical over just a few ohms.. So I had a little bit more investigation to do..
Cut a long story short, I think just a tiny bit of noise on the 40MHz line is enough to cause problems.. The input value resistor to the buffer seemed overcritical in all my previous tests and of course this was proven again today. I tried a lot of things, there was seems to work is simply placing a 22pF capacitor on the buffer input. Now I am going via a 33R resistor and it all seems fine again.
I'm using a schmitt buffer, so it should filter out all sorts of noise and glitches. Obviously there is something else going on which it is not filtering out. It's not relating to minimum or maximum voltages as I did a lot of experimenting with that this morning. Even altering DC offset levels etc..
In any case, I will update the PCB design to include this capacitor.. I will leave the board on testing throughout today again to make sure's works.. I'm not too worried about investigating this issue.. If I investigate every tiny little thing the project will never move forward..
In relation to the dualtos boards, where currently I am soldering on the ROM directly onto the PCB.. The problem is that I wanted to keep stock of the ROM's separately in order to keep costs down a lot. It is not really practical to build up 20 of each language.. It's why I put a lot of the current boards (with sockets) built up, so I can keep a large stock of them, I just program low quantity of ROMs as needed. But obviously this would be a huge problem if I went to solder all the ROM's onto the new PCBs...
So I'm going to order a few SMT sockets and see if these are better than the larger through-hole sockets.. I don't have any spare boards, so I will have to order some more, so it could be some time before updating relation to those...
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.
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.
Re: STE V1.5 32MHz BOOSTER - STATUS
The sockets I investigated in another thread... https://www.exxosforum.co.uk/forum/viewt ... 6567#p6567
And I just on the changes to the DualTOS board.. I also added on the list as previously mentioned...
Will get some prototypes made soon..
And I just on the changes to the DualTOS board.. I also added on the list as previously mentioned...
Will get some prototypes made soon..
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.
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.
Re: STE V1.5 32MHz BOOSTER - STATUS
I've ordered 3 of the final revision boards. Which are the new dualtos boards & plug in booster boards and stencils.
If all goes well, they will be 2 sets of boards which will be up for sale once tested out. I don't know what price these will be yet, but likely more expensive than the current boards in my store due to assembly and prototype costs.. But they will likely be still cheaper than the final store price... In any case if anyone wants to call dibs on one then let me know and I will try and remember
If all goes well, they will be 2 sets of boards which will be up for sale once tested out. I don't know what price these will be yet, but likely more expensive than the current boards in my store due to assembly and prototype costs.. But they will likely be still cheaper than the final store price... In any case if anyone wants to call dibs on one then let me know and I will try and remember
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.
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.
Re: STE V1.5 32MHz BOOSTER - STATUS
Oh go on then, you twisted my arm....
And hopefully that'd help with the drop in sales too..... but will want some1mb simms too if I'm selected to be the guinea pig, lol.
And hopefully that'd help with the drop in sales too..... but will want some1mb simms too if I'm selected to be the guinea pig, lol.
If it ain't broke, test it to Destruction.
Re: STE V1.5 32MHz BOOSTER - STATUS
Updated boards just arrived with stencils
I will try and build up the DUALTOS board today and see if I can get the SMT socket on without melting it
I will try and build up the DUALTOS board today and see if I can get the SMT socket on without melting it
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.
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.
- rubber_jonnie
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Re: STE V1.5 32MHz BOOSTER - STATUS
Niiiiiiiice.
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...
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...
Re: STE V1.5 32MHz BOOSTER - STATUS
Bit overcooked, but oh well, these DIY jobs never go 100% right
Still seems to be OK contact wise.. now to solder the headers and give it a good test out..
Still seems to be OK contact wise.. now to solder the headers and give it a good test out..
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.
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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- Joined: Tue Aug 22, 2017 4:27 am
Re: STE V1.5 32MHz BOOSTER - STATUS
I ordered medium rare! Take it back!
Re: STE V1.5 32MHz BOOSTER - STATUS
Looks like some header pins I soldered on Saturday. Slightly over done is better than dry joints any day
If it ain't broke, test it to Destruction.