Author Topic: SSL 4000E (G total recall computer green lines graphics problem)  (Read 3202 times)

chris_heyman

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Hi All.
I am new to this forum, so bear with me :)

I installed a 1987 4000E console (32 mono, 8 stereo) in my studio about 4 months ago. Now where I have gotten my head around the console I am starting on learning the computer.

I unfortunately have a problem, I have these green lines on the monitor wich makes it hard to see whats going on. I have tried to adjust the R,G,B colors on the computer without luck. I have also tried adjusting the monitor.

Does anyone have a clue on where my problem might be? There is no problems with the regular home screen, even tho that its only green.

Is there any good easy "how to" guides on using the G-series computer, that isn't in 600+ pages manual form?

I really hope that there is someone on this forum who expierienced this and can help.
Its an awesome sounding console but there is alot of maintenance involved  ;D

sintech

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Re: SSL 4000E (G total recall computer green lines graphics problem)
« Reply #1 on: August 14, 2017, 11:52:59 PM »
This is a Ram issue in the TR Stack

sintech

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Re: SSL 4000E (G total recall computer green lines graphics problem)
« Reply #2 on: August 15, 2017, 10:57:55 AM »
Please check this, the issue looks identical, and the solution is at the bottom of the thread:

http://forum.sslmixed.com/index.php/topic,594.msg4012.html#msg4012

chris_heyman

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Re: SSL 4000E (G total recall computer green lines graphics problem)
« Reply #3 on: August 15, 2017, 09:56:00 PM »
Thank you so much sintech!!

That looks alot like my problem! Do you think that the chips need to be replaced and if so do you know where to get them? I am located in Copenhagen :)

pascal.verdet

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Re: SSL 4000E (G total recall computer green lines graphics problem)
« Reply #4 on: August 16, 2017, 08:42:22 AM »
Hi I can check if I have 4116 available.
Cheers,

ULH

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Re: SSL 4000E (G total recall computer green lines graphics problem)
« Reply #5 on: November 29, 2017, 04:43:15 PM »
Hi

So I really want a way to test 4116 ram chips so i build my own tester. This is my video documenting the 4116 D Ram tester:
https://youtu.be/MVZYB54VD2g

Regards,

Uffe Lund-Hansen - Frostbox Labs

brewery

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Re: SSL 4000E (G total recall computer green lines graphics problem)
« Reply #6 on: November 29, 2017, 06:18:46 PM »
very impressive uffe!

i have one of these testers here, with both the 4116 and rsam blade. great tool, also works for sram from studers, old fx units etc..

http://www.neoloch.com/products/Inquisitor.php#SRAM_Blade

Clip6

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Re: SSL 4000E (G total recall computer green lines graphics problem)
« Reply #7 on: November 29, 2017, 11:37:07 PM »
Cool tech. ULH nice job. Thanks

ULH

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Re: SSL 4000E (G total recall computer green lines graphics problem)
« Reply #8 on: November 30, 2017, 08:55:13 AM »
Thanks guys!

And thanks for the link brewery. I havn't stumbled on those before. They look very well designed and at a very reasonable price and very much open source with schematics and descriptions of the test method in the firmware.

They have designed af more thorough test that I might implement in my firmware. It's kind of tricky to design a test of these D rams that can make a certain positive answer. But if my tester gives a negative answer you are sure that the IC is bad.

The only thing I couldn't get answered on their website was how fast they can make the read & write cycles with the PIC 32 bit micro. With an arduino nano and the arduino IDE I'm at 200 microseconds so it's far of the approx. 0.5 microseconds the IC's are capable of. At some point I will put a logic analyzer on the 4116 inside the total recall computer to see how fast SSL reads & writes to them.

Cheers & sorry for semi-hijacking this thread - over & out!

Uffe - Frostbox Labs

Artur D'Assumpção

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Re: SSL 4000E (G total recall computer green lines graphics problem)
« Reply #9 on: November 30, 2017, 08:05:57 PM »
Uffe,

This is awesome! :) Thanks for your lovely contribution as always! Great work! :D

Cheers,

Artur

Clip6

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Re: SSL 4000E (G total recall computer green lines graphics problem)
« Reply #10 on: December 01, 2017, 03:48:27 AM »
Uffe any chance you have any ideas on how to replace the 3.5 floppy drive with an SD drive. Saw a Fairlight 8 inch drive replaced with SD storage. Same drives that guys use to replace 3.5 drives on 80's samplers.

Thanks

http://hxc2001.com/
« Last Edit: December 01, 2017, 03:51:20 AM by Clip6 »

sintech

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Re: SSL 4000E (G total recall computer green lines graphics problem)
« Reply #11 on: December 03, 2017, 01:14:01 AM »
Awesome!!! well done!