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PCB Build - Progress - Post your Pics here :-)

All information relating to the Alpha plus all the WIP threads etc.
troed
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Re: PCB Build - Progress - Post your Pics here :-)

Post by troed »

Forgottenmyname wrote: 18 Sep 2018 11:08 BOMBS, we have bombs!
Alright! We're done. That's the most common ST screen anyway :D
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Re: PCB Build - Progress - Post your Pics here :-)

Post by exxos »

troed wrote: 18 Sep 2018 12:30 Alright! We're done. That's the most common ST screen anyway :D
:lolbig: :bravo:
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Icky
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Re: PCB Build - Progress - Post your Pics here :-)

Post by Icky »

Thought whilst changing over SIMM I would post pics of the extended headers that allow the Exxos RAM card to fit.

IMG_3052.png
IMG_3053.png
IMG_3054.png
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PhilC
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Re: PCB Build - Progress - Post your Pics here :-)

Post by PhilC »

troed wrote: 18 Sep 2018 12:30
Forgottenmyname wrote: 18 Sep 2018 11:08 BOMBS, we have bombs!
Alright! We're done. That's the most common ST screen anyway :D
Ok I'll put it away now. Hurry up with the next revision then Exxos :D
If it ain't broke, test it to Destruction.
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Re: PCB Build - Progress - Post your Pics here :-)

Post by Icky »

Forgottenmyname wrote: 18 Sep 2018 12:51
troed wrote: 18 Sep 2018 12:30

Alright! We're done. That's the most common ST screen anyway :D
Ok I'll put it away now. Hurry up with the next revision then Exxos :D
No don't put it away keep at it - we want to see the desktop :D

What did you do to get it to the bomb stage?
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exxos
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Re: PCB Build - Progress - Post your Pics here :-)

Post by exxos »

Do both you guys have sync issues ? I've lost the plot whos doing what..
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Re: PCB Build - Progress - Post your Pics here :-)

Post by PhilC »

Yes, I still have sync issues on my CRT, i've got a rolling yellow screen (think my blue wire is stuffed)

I still have 60hz out of 38 on the glue as well as 15khz out of 37.

I've no longer got /AS cycling, its just low now. Have some pulses on R/W on power up and then after about 10 seconds that drops to 0 if i remember correctly.

Pulses on the MMu to the memory but nothing from the rom so far, so thats the problem in my case I think.

When I got it to bomb I was scoping around the rom.
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Re: PCB Build - Progress - Post your Pics here :-)

Post by PhilC »

exxos wrote: 18 Sep 2018 12:55 Do both you guys have sync issues ? I've lost the plot whos doing what..
Do you think we should start an individual thread each?
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Re: PCB Build - Progress - Post your Pics here :-)

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Forgottenmyname wrote: 18 Sep 2018 13:04 Do you think we should start an individual thread each?
Yeah that might be a better idea, then start with what does and doesn't work etc, whats been done and not done...
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Re: PCB Build - Progress - Post your Pics here :-)

Post by Icky »

exxos wrote: 18 Sep 2018 13:06
Forgottenmyname wrote: 18 Sep 2018 13:04 Do you think we should start an individual thread each?
Yeah that might be a better idea, then start with what does and doesn't work etc, whats been done and not done...
Agree - Forgottenmyname let me PM you with my details of my board and we can consolidate that new thread

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