Icky - Progress

Post by **Icky** » 18 Sep 2018 20:41

exxos wrote: 18 Sep 2018 20:00
Forgottenmyname wrote: 18 Sep 2018 19:57 Just quoting you on that.... for the record like.....
No problem :)

I've checked all around the CPU.. I mean really it should be booting up... Have to see if Icky has any luck...

Right I am caught up extra SIL in place but still no joy.

Need to measure a few things now

Post by **exxos** » 18 Sep 2018 20:48

Icky wrote: 18 Sep 2018 20:41 Right I am caught up extra SIL in place but still no joy.

Need to measure a few things now

damn :( Not sure what else to check at the moment.

Post by **exxos** » 18 Sep 2018 22:01

I think if your switching to 50hz then TOS must be running to a point, so not long after looks to be like MMU setup, then onto RAM setup.. So might be worth checking out the RAM side of things on the PCB, and even double check what I've wired in the diagram..

I am checking things out myself, not found any issues yet.

kodak80 · Post by **kodak80** » 18 Sep 2018 22:23

Icky wrote: 18 Sep 2018 20:41
exxos wrote: 18 Sep 2018 20:00

No problem :)

I've checked all around the CPU.. I mean really it should be booting up... Have to see if Icky has any luck...
Right I am caught up extra SIL in place but still no joy.

Need to measure a few things now

Can you add a photo of the SIL in place? I am trying to keep up with mods while I wait for a few components for my board.

Post by **Icky** » 18 Sep 2018 22:41

kodak80 wrote: 18 Sep 2018 22:23 Can you add a photo of the SIL in place? I am trying to keep up with mods while I wait for a few components for my board.

Sure, its not elegant as it was a quick fix.

I actually used the SIL to do the BGACK PULL UP FIX as well. You can see the common pin going to the 5V of the capacitor and am using insulating tape so as not to short anything.

IMG_3063.png

kodak80 · Post by **kodak80** » 18 Sep 2018 22:46

Icky wrote: 18 Sep 2018 22:41
kodak80 wrote: 18 Sep 2018 22:23 Can you add a photo of the SIL in place? I am trying to keep up with mods while I wait for a few components for my board.
Sure, its not elegant as it was a quick fix.

I actually used the SIL to do the BGACK PULL UP FIX as well. You can see the common pin going to the 5V of the capacitor and am using insulating tape so as not to short anything.

Thanks, looks fine to me.

Post by **exxos** » 18 Sep 2018 22:50

Icky wrote: 18 Sep 2018 20:41 Right I am caught up extra SIL in place but still no joy.

Are you still seeing 50hz set on boot ?

Post by **Icky** » 18 Sep 2018 22:54

exxos wrote: 18 Sep 2018 22:50
Icky wrote: 18 Sep 2018 20:41 Right I am caught up extra SIL in place but still no joy.
Are you still seeing 50hz set on boot ?

Yes on start it goes from 59.9Hz to 49.7Hz on my scope

Post by **exxos** » 18 Sep 2018 23:08

Icky wrote: 18 Sep 2018 22:54 Yes on start it goes from 59.9Hz to 49.7Hz on my scope

Just for hell of it, just try lifting up the ROM in the socket a tiny bit... I can only think ROM starts running then dies a few address lines up...

Do you get activity on all data & address lines ?

Post by **Icky** » 18 Sep 2018 23:18

exxos wrote: 18 Sep 2018 23:08
Icky wrote: 18 Sep 2018 22:54 Yes on start it goes from 59.9Hz to 49.7Hz on my scope
Just for hell of it, just try lifting up the ROM in the socket a tiny bit... I can only think ROM starts running then dies a few address lines up...

Do you get activity on all data & address lines ?

OK - I found some bad soldering on the RP6. I cleaned it up and now I am getting bombs but the screen is still all over the place. Let me attach a video

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