STFM Booster 2.3 + Dual TOS Kit, TOS 2.06 Issue

leon22 · Post by **leon22** » 20 Jan 2019 20:09

exxos wrote: 16 Jan 2019 18:45
leon22 wrote: 16 Jan 2019 18:39 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

Post by **exxos** » 20 Jan 2019 21:02

The wire which goes to the ROM board, place 68R resistor in series with that wire.

leon22 · Post by **leon22** » 20 Jan 2019 21:08

exxos wrote: 20 Jan 2019 21:02 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!

Post by **exxos** » 20 Jan 2019 21:10

leon22 wrote: 20 Jan 2019 21:08 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.

Post by **exxos** » 20 Jan 2019 22:05

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 ?

leon22 · Post by **leon22** » 21 Jan 2019 06:53

exxos wrote: 20 Jan 2019 21:10
leon22 wrote: 20 Jan 2019 21:08 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

Post by **exxos** » 21 Jan 2019 10:21

Where are you measuring it ?

leon22 · Post by **leon22** » 21 Jan 2019 13:00

exxos wrote: 21 Jan 2019 10:21 Where are you measuring it ?

On Pin39 of the Shifter IC as suggested!

Post by **exxos** » 21 Jan 2019 13:23

leon22 wrote: 21 Jan 2019 13:00 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

leon22 · Post by **leon22** » 21 Jan 2019 14:07

exxos wrote: 21 Jan 2019 13:23
leon22 wrote: 21 Jan 2019 13:00 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

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

g66q4km.png

Greets Peter

exxos's Atari, Amiga & retro forum

STFM Booster 2.3 + Dual TOS Kit, TOS 2.06 Issue

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

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

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

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

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

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

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

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