Sorry to dig up an oldie, just been arseing about with Si's op wolf board, been swapping over pals and anything in a socket from the dead board to the "almost worker" trying to see If I could "get lucky"
No joy just as I suspected, I think we are on the right track already, just wanted to see if GOD was on my side today, clearly not
I did however nick the sound eprom from the dead one as although I had compared Si's one to mame and it was 100%, I still thought who knows it could be faulty some other way...?
Nah, that's sounds retarded now I've said it...
Now a z80 controls the sound I think on these?? Is that correct??
So I got my logic probe and read that to check it's working you need to check it's reset state as that's what kicks the processor to life? Yeah?
Correct me please as these are "new waters" for a simpleton like me.
Pin 26 is the reset pin, yeah? Am I looking at the correct datasheet?
Sorry just need you all to check everything!
From what I was reading tonight, the second you power up it should go LOW (green) for 0.5 of a second then go to HIGH (red)
Now does this mean that it should then stay HIGH (red)?
Because when I probe and power up the board mine goes LOW (green) for almost 2 seconds then pulses for a split second then I think it tries to go to hign but I never see HIGH (red) light up?
It's almost like it's about to then no lights at all.
(Maybe a very slight flash but sooo quick, or I just dream it as I want it to do it so much)
Is this normal??
Or maybe it goes HIGH (red) so quick I almost can't register it.
Should it stay HIGH (red) once it's running?
If so maybe I show try a z80 in a socket,
Of course I understand it could be something else not giving the z80 a signal, bad track/trace or some other chip it passes through or whatever....
Does the reset line only do a quick check and then you will see no activity on that pin after first power on?
I'm guessing that's the case, but still not convinced that I'm getting the HIGH and it's then running!
How else can you check z80's for running state?
I can up a vid of my probe'n if anyone wants to see it and confirm if it's ok or bad.
Many thanks peps.
Please help me get Si his op wolf back, as I say no profit here just love of helping a brother out, well ok maybe I'll get a go once it's fixed
paulcan692011-05-01 00:46:25
No joy just as I suspected, I think we are on the right track already, just wanted to see if GOD was on my side today, clearly not
I did however nick the sound eprom from the dead one as although I had compared Si's one to mame and it was 100%, I still thought who knows it could be faulty some other way...?
Nah, that's sounds retarded now I've said it...
Now a z80 controls the sound I think on these?? Is that correct??
So I got my logic probe and read that to check it's working you need to check it's reset state as that's what kicks the processor to life? Yeah?
Correct me please as these are "new waters" for a simpleton like me.
Pin 26 is the reset pin, yeah? Am I looking at the correct datasheet?
From what I was reading tonight, the second you power up it should go LOW (green) for 0.5 of a second then go to HIGH (red)
Now does this mean that it should then stay HIGH (red)?
Because when I probe and power up the board mine goes LOW (green) for almost 2 seconds then pulses for a split second then I think it tries to go to hign but I never see HIGH (red) light up?
It's almost like it's about to then no lights at all.
(Maybe a very slight flash but sooo quick, or I just dream it as I want it to do it so much)
Is this normal??
Or maybe it goes HIGH (red) so quick I almost can't register it.
Should it stay HIGH (red) once it's running?
If so maybe I show try a z80 in a socket,
Of course I understand it could be something else not giving the z80 a signal, bad track/trace or some other chip it passes through or whatever....
Does the reset line only do a quick check and then you will see no activity on that pin after first power on?
I'm guessing that's the case, but still not convinced that I'm getting the HIGH and it's then running!
How else can you check z80's for running state?
I can up a vid of my probe'n if anyone wants to see it and confirm if it's ok or bad.
Many thanks peps.
Please help me get Si his op wolf back, as I say no profit here just love of helping a brother out, well ok maybe I'll get a go once it's fixed
paulcan692011-05-01 00:46:25
