STFM Booster 2.3 + Dual TOS Kit, TOS 2.06 Issue

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leon22
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Re: STFM Booster 2.3 + Dual TOS Kit, TOS 2.06 Issue

Post by leon22 »

exxos wrote: Wed Jan 16, 2019 6:45 pm
leon22 wrote: Wed Jan 16, 2019 6:39 pm No I mean TOS104 (sorry for the typo)! So I can boot in 16MHz + 8MHz mode to TOS104 and never to TOS206!
The only possible modification is wiring a 68R resistor in series with ROM CE to the dualtos board as I have seen issues there recently.

You probably would have to send me your motherboard to diagnose the issue because it's not a fault I have seen before. There's no difference really between 16MHz TOS104 or TOS206.
Can you please clarify the suggested resistor connection on the PCB?! (image)

Thank you!

PS: I also cut the wires -> same result
PPS: will post the 16MHz signal soon
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exxos
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Re: STFM Booster 2.3 + Dual TOS Kit, TOS 2.06 Issue

Post by exxos »

The wire which goes to the ROM board, place 68R resistor in series with that wire.
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.
leon22
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Re: STFM Booster 2.3 + Dual TOS Kit, TOS 2.06 Issue

Post by leon22 »

exxos wrote: Sun Jan 20, 2019 9:02 pm The wire which goes to the ROM board, place 68R resistor in series with that wire.
I interpreted it right! ;-) Also tried this -> same result!
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Re: STFM Booster 2.3 + Dual TOS Kit, TOS 2.06 Issue

Post by exxos »

leon22 wrote: Sun Jan 20, 2019 9:08 pm I interpreted it right! ;-) Also tried this -> same result!
OK, so need to see the 16MHz waveform output from the shifter pin 39, to pin 1 on the GAL top right of the booster PCB.
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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exxos
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Re: STFM Booster 2.3 + Dual TOS Kit, TOS 2.06 Issue

Post by exxos »

Also, what floppy drive are you using exactly ? and have you tried a different one ?

Also when it bombs, what happens if you press reset on the back of the ST, does it bomb again ?
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.
leon22
Posts: 26
Joined: Thu Jan 10, 2019 6:27 pm

Re: STFM Booster 2.3 + Dual TOS Kit, TOS 2.06 Issue

Post by leon22 »

exxos wrote: Sun Jan 20, 2019 9:10 pm
leon22 wrote: Sun Jan 20, 2019 9:08 pm I interpreted it right! ;-) Also tried this -> same result!
OK, so need to see the 16MHz waveform output from the shifter pin 39, to pin 1 on the GAL top right of the booster PCB.
Ok, here is the 16MHz signal:

YDfBNm8.png
YDfBNm8.png (42.41 KiB) Viewed 1215 times
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exxos
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Re: STFM Booster 2.3 + Dual TOS Kit, TOS 2.06 Issue

Post by exxos »

Where are you measuring 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.
leon22
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Re: STFM Booster 2.3 + Dual TOS Kit, TOS 2.06 Issue

Post by leon22 »

exxos wrote: Mon Jan 21, 2019 10:21 am Where are you measuring it ?
On Pin39 of the Shifter IC as suggested!
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Re: STFM Booster 2.3 + Dual TOS Kit, TOS 2.06 Issue

Post by exxos »

leon22 wrote: Mon Jan 21, 2019 1:00 pm On Pin39 of the Shifter IC as suggested!
You haven't read my post fully as I asked for 2 readings... https://www.exxosforum.co.uk/forum/viewt ... 068#p17044
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.
leon22
Posts: 26
Joined: Thu Jan 10, 2019 6:27 pm

Re: STFM Booster 2.3 + Dual TOS Kit, TOS 2.06 Issue

Post by leon22 »

exxos wrote: Mon Jan 21, 2019 1:23 pm
leon22 wrote: Mon Jan 21, 2019 1:00 pm On Pin39 of the Shifter IC as suggested!
You haven't read my post fully as I asked for 2 readings... https://www.exxosforum.co.uk/forum/viewt ... 068#p17044
You are right,sorry!

My test setup:

VPspgFk.jpg
VPspgFk.jpg (318.38 KiB) Viewed 1214 times

Signals (Line 1 Pin39 Shifter IC, Line 2 Booster PCB):

g66q4km.png
g66q4km.png (60.94 KiB) Viewed 1214 times

Greets Peter
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