CURRENT PROTOTYPE STATUS (SEC 64MHz 68000)

[PhilC]

I know people always suggest it but would it be easier to start with using a clock which is a multiple of 8, so the slots as you put it are predictable between each original clock cycle?

p.s reading this thread has been very useful from a learning point of view.

[exxos]

I know people always suggest it but would it be easier to start with using a clock which is a multiple of 8, so the slots as you put it are predictable between each original clock cycle?

Yes its easier, but on the STFM 32MHz clock isn't strong enough to use like it is on the STE. But also multiples of 8 dont seem to work. Has to be 8,16,32 for some reason. So the next step would be 64 which is to fast. Its why I need to use a dedicated osc 50mhz. The syncing of 50mhz isn't much of a problem, though the other chips are still running at 8mhz so it can cause timing issues.

Though like I said before, it can run GB6 all day without crashing. Though that is because I factored in all the needed timings for the slower 8mhz chips. But there is something else going on which I dont know about yet, so I cant factor that into the logic.

[PhilC]

Well good luck, enjoy lots off time with your LA and scope then i guess?

[exxos]

Well good luck, enjoy lots off time with your LA and scope then i guess?

I don't exactly even have a LA... I do have USB one, but I already seem to spend more time fighting iffy software than doing anything. I have put in a request to TF for him to scope out stock timings exactly so I can see what they really are.. Most work I end up doing on my 2 channel scope I keep toying with getting a 4 channel one, but can't really justify the expense for what it would get used for.

[exxos]

New PCB's arrived a few days ago. But due to intense man-flu, won't be any progress until next week.

Once I get this going, I can investigate these odd issues I have been seeing...

sec2.jpg (146.77 KiB) Viewed 4845 times

[PhilC]

Looking good

But

Is it me? Or is there some kindofspider like faceless monster on the bottom one?

How many did you get made?

[exxos]

Is it me? Or is there some kindofspider like faceless monster on the bottom one?

Yeah, It all got hacked about that much it ended in a bit of a mess. TerribleFire will probably be having palpitations about it....

How many did you get made?

Only 10. I can donate a board if anyone wants to build one up, but will need a Atmel programmer. I have no idea how long it will take to debug the odd faults though.

[PhilC]

I would say yes but no atmel programmer yet and not sure how much help I would be in this case any way?

[Icky]

Count me in - I'm mad enough to play around with another board

[PhilC]

Is the Atmel programmer the same as for the atmega328 etc? As I have one of those somewhere