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Re: Icky - Progress

Posted: 25 Sep 2018 21:49
by exxos
Icky wrote: 25 Sep 2018 21:47 Well that fix made my floppy drive start working - need to check it out with some tests.

Desktop now shows Drives and Trash.
Yay!
I think the IRQ was "Stuck" and the GLUE was thinking the floppy wanted constant DMA access..
Icky wrote: 25 Sep 2018 21:47 Still no a sound or keyboard
Arse :(

Re: Icky - Progress

Posted: 25 Sep 2018 21:53
by Icky
exxos wrote: 25 Sep 2018 21:49
Icky wrote: 25 Sep 2018 21:47 Well that fix made my floppy drive start working - need to check it out with some tests.

Desktop now shows Drives and Trash.
Yay!
I think the IRQ was "Stuck" and the GLUE was thinking the floppy wanted constant DMA access..
Icky wrote: 25 Sep 2018 21:47 Still no a sound or keyboard
Arse :(
We are making great progress but I guess we keep having these brick walls in front of us but we keep smashing them down.

One thing I have noticed is the screen flashes white every now and again - every 3 mins or so.

Another thought is that when we have finished and get a working STF you will have a modern legible schematic.

Re: Icky - Progress

Posted: 25 Sep 2018 21:56
by exxos
Icky wrote: 25 Sep 2018 21:53 We are making great progress but I guess we keep having these brick walls in front of us but we keep smashing them down.
That is true! you been going like a man possessed these past days!

Icky wrote: 25 Sep 2018 21:53 One thing I have noticed is the screen flashes white every now and again - every 3 mins or so.
Odd...
Icky wrote: 25 Sep 2018 21:53 Another thought is that when we have finished and get a working STF you will have a modern legible schematic.
Yeah! "exxos re-mashed version" of it though :)

Re: Icky - Progress

Posted: 25 Sep 2018 21:57
by exxos
Do you have both gnds connected on the keyboard connector ? Phil mentioned the keyboard caused issues without pin 8 connected..

Re: Icky - Progress

Posted: 25 Sep 2018 22:06
by Icky
exxos wrote: 25 Sep 2018 21:57 Do you have both gnds connected on the keyboard connector ? Phil mentioned the keyboard caused issues without pin 8 connected..
No I don't have pin 8 grounded - let me try that

Re: Icky - Progress

Posted: 25 Sep 2018 22:11
by exxos
As for the audio, we dont know if the new audio amp works ... probably idea is to try the diag-cart via serial and get the sound test running... check the audio out pins on the YM chip directly on scope and see if you see some activity there...

I'm checking the YM circuit in general and not found anything yet...

Re: Icky - Progress

Posted: 25 Sep 2018 22:14
by Icky
exxos wrote: 25 Sep 2018 22:11 As for the audio, we dont know if the new audio amp works ... probably idea is to try the diag-cart via serial and get the sound test running... check the audio out pins on the YM chip directly on scope and see if you see some activity there...

I'm checking the YM circuit in general and not found anything yet...
Well thats the funny thing I did get sound at one point when testing with the diagnostic cart - don't know when abouts but I definitely had sound.

Back in the thread somewhere. Cant remember if it was post or pre the GLUE DATALINE FIX.

Re: Icky - Progress

Posted: 25 Sep 2018 22:17
by Icky
Icky wrote: 25 Sep 2018 22:14 Back in the thread somewhere. Cant remember if it was post or pre the GLUE DATALINE FIX.
Sound was before GLUE DATALINE FIX. I will check with scope though

Re: Icky - Progress

Posted: 25 Sep 2018 22:21
by exxos
Icky wrote: 25 Sep 2018 22:17 Sound was before GLUE DATALINE FIX. I will check with scope though
Even more oddities then.. datalines were definitely wrong... not good when a fix breaks something though :roll:

Re: Icky - Progress

Posted: 25 Sep 2018 22:26
by exxos
:lol: Missing resistor on the keyboard ... man, what is it with me and pull up resistors :lol: :roll: