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Author Topic: Broken EP (Read 11590 times)

Offline SlashNet

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Re: Broken EP
« Reply #60 on: 2014.April.01. 23:20:17 »
First photo looks familiar (sometimes this line flashing) - that I noticed many years ago.
Last two... Maybe, I saw. I'll try tomorrow to load and watch.

Offline Zozosoft

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Re: Broken EP
« Reply #61 on: 2014.April.02. 00:01:25 »
Quote from: SlashNet
First photo looks familiar (sometimes this line flashing) - that I noticed many years ago.
Who found this say many programs with similar loader (title name under the screen) produce same bug. I'm never see same :oops:

One quick idea, I'm not sure it is change anything: short circuit R12. Usualy we do this when made a turbo machine, this adjust something with the video RAM timing.

Offline SlashNet

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Re: Broken EP
« Reply #62 on: 2014.April.02. 19:20:25 »
Yep. Fast Food has same effect.

R12 - shorted. Nothing changed.

Offline Zozosoft

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Re: Broken EP
« Reply #63 on: 2014.April.02. 20:04:41 »
Can you make detailed photos from your motherboard? I will look for a similar one from my spares and test it with these programs.

Offline SlashNet

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Re: Broken EP
« Reply #64 on: 2014.April.02. 20:48:45 »
Here photogallery: https://www.dropbox.com/sh/oduseq994r1t9s2/atC8Cvyc5-

I don't remove PCB with memory, because I don't have currently soldering-iron to put it back.

Some photos from other side here: https://www.dropbox.com/sh/kckg3wa3inocrub/AgKLQn--Qt

Offline Zozosoft

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Re: Broken EP
« Reply #65 on: 2014.April.02. 21:03:32 »
Quote from: SlashNet
I don't remove PCB with memory, because I don't have currently soldering-iron to put it back.
Don't problem, I think the CPU, video RAM ICs, memory multiplexers are the most important components about the problem.
This is look exactly same. Now needed to find which machine have this board :oops: I hope not sold these under the many years after this photo made.

Offline Zozosoft

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Re: Broken EP
« Reply #66 on: 2014.April.03. 23:12:03 »
I found same motherboard but don't see any crazy screen bugs.
It is good new for me :-) But bad news about your problem :-( hard to find what is the problem if I'm not see it .-(

Offline SlashNet

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Re: Broken EP
« Reply #67 on: 2014.April.04. 12:33:48 »
bad good news, but anyway thanks. :)

Offline Zozosoft

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Re: Broken EP
« Reply #68 on: 2014.April.04. 13:16:55 »
I will try to make minimum version from the know "bug-generator" programs, for example only keep the LPT and screen build parts. If the minimum programs also make a crazy screen for you, then possible change something or other something, etc for detect which Nick settings generate bugs. If we know the specified settings then can thinking about what do this in hw level.

But it is will be later, I'm currently busy about the SD Cartridge software :oops:

Offline SlashNet

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Re: Broken EP
« Reply #69 on: 2014.April.04. 15:35:26 »
OK.
It's not so urgent :)