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Re: exxos build
Posted: 05 Mar 2020 16:59
by PaulJ
rubber_jonnie wrote: 05 Mar 2020 16:29
@PaulJ Just mean. Like the girls at school. Mean Girls.
Come on Jon, you know were all pulling for ya!!! Shesh Exxos created your own celebration icon. :girldance:
Re: exxos build
Posted: 05 Mar 2020 17:02
by exxos
PaulJ wrote: 05 Mar 2020 16:59
Come on Jon, you know were all pulling for ya!!! Shesh Exxos created your own celebration icon.
Yeah, it was actually my second choice, I probably would have got in trouble with the one I was going to add originally :lol: :roll:
Re: exxos build
Posted: 05 Mar 2020 18:50
by Icky
Having 3 built @exxos doesn't mean you get 3 H4 mugs :)
Re: exxos build
Posted: 05 Mar 2020 18:57
by exxos
Icky wrote: 05 Mar 2020 18:50
Having 3 built @exxos doesn't mean you get 3 H4 mugs :)
@rubber_jonnie is right everyone is being a meanie today :)
Re: exxos build
Posted: 05 Mar 2020 19:00
by Icky
exxos wrote: 05 Mar 2020 18:57
Icky wrote: 05 Mar 2020 18:50
Having 3 built @exxos doesn't mean you get 3 H4 mugs :)
@rubber_jonnie is right everyone is being a meanie today :)
Well
@rubber_jonnie doesn't even have 1x mug - yet! I'm holding it in storage for the right moment :)
Re: exxos build
Posted: 05 Mar 2020 19:01
by rubber_jonnie
exxos wrote: 05 Mar 2020 18:57
Icky wrote: 05 Mar 2020 18:50
Having 3 built @exxos doesn't mean you get 3 H4 mugs :)
@rubber_jonnie is right everyone is being a meanie today :)
Do I get (H) 4 mugs for creative troubleshooting?
I don't know why eryone is so mean today!! ;)
Re: exxos build
Posted: 27 Apr 2020 14:27
by exxos
In amongst all the chaos of testing chips on various H4's... #3 seemingly died for no reason which I just investigated.
All the clocks were present but I never saw /AS going low ( or if it did, I did not detect it on my scope). Probing around I saw RESET was switching, but HALT was stuck low all the time. I removed the CPU and HALT started to function correctly again. I noticed a bent pin on the CPU, always one of the corner ones, honestly I seriously hate PLCC packages! But nope, still no boot.
I took the ROM out to make sure it did actually have TOS104 in it.. and after fighting with a iffy PLCC adapter for my programmer, I found them verified TOS was in the lower bank. I also found the ROM also had a bent pin on the corner, and I mention I hate PLCC packages ? But nope, still no boot.
I swapped out the CPU,MMU,GLUE with known working ones but still no joy...But then I noticed something....
IMG_5049.JPG
Let's see who can see what is wrong, I was frankly amazed by this in more ways than one... I guess us season builders will spot it right off...
Needless to say this board is now booting again now :D
Re: exxos build
Posted: 27 Apr 2020 14:39
by derkom
You haven't shorted the necessary pins in the DS1315 socket.
Re: exxos build
Posted: 27 Apr 2020 14:42
by exxos
derkom wrote: 27 Apr 2020 14:39
You haven't shorted the necessary pins in the DS1315 socket.
That's a point, but that only effects the cartridge port, and in this case there isn't one :lol:
Re: exxos build
Posted: 27 Apr 2020 14:50
by derkom
exxos wrote: 27 Apr 2020 14:42
derkom wrote: 27 Apr 2020 14:39
You haven't shorted the necessary pins in the DS1315 socket.
That's a point, but that only effects the cartridge port, and in this case there isn't one :lol:
I will admit I never actually knew what the DS1315 was for. :)
I'll take another stab at it: You've got your TOS ROM 180° wrong. :mrgreen:
Tell us how you feel about PLCC packaging.