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Re: STFM Booster 2.3 + Dual TOS Kit, TOS 2.06 Issue
Posted: 20 Jan 2019 20:09
by leon22
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
Re: STFM Booster 2.3 + Dual TOS Kit, TOS 2.06 Issue
Posted: 20 Jan 2019 21:02
by exxos
The wire which goes to the ROM board, place 68R resistor in series with that wire.
Re: STFM Booster 2.3 + Dual TOS Kit, TOS 2.06 Issue
Posted: 20 Jan 2019 21:08
by leon22
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!
Re: STFM Booster 2.3 + Dual TOS Kit, TOS 2.06 Issue
Posted: 20 Jan 2019 21:10
by exxos
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.
Re: STFM Booster 2.3 + Dual TOS Kit, TOS 2.06 Issue
Posted: 20 Jan 2019 22:05
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 ?
Re: STFM Booster 2.3 + Dual TOS Kit, TOS 2.06 Issue
Posted: 21 Jan 2019 06:53
by leon22
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
Re: STFM Booster 2.3 + Dual TOS Kit, TOS 2.06 Issue
Posted: 21 Jan 2019 10:21
by exxos
Where are you measuring it ?
Re: STFM Booster 2.3 + Dual TOS Kit, TOS 2.06 Issue
Posted: 21 Jan 2019 13:00
by leon22
exxos wrote: 21 Jan 2019 10:21
Where are you measuring it ?
On Pin39 of the Shifter IC as suggested!
Re: STFM Booster 2.3 + Dual TOS Kit, TOS 2.06 Issue
Posted: 21 Jan 2019 13:23
by exxos
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
Re: STFM Booster 2.3 + Dual TOS Kit, TOS 2.06 Issue
Posted: 21 Jan 2019 14:07
by leon22
You are right,sorry!
My test setup:
VPspgFk.jpg
Signals (Line 1 Pin39 Shifter IC, Line 2 Booster PCB):
g66q4km.png
Greets Peter