Author Topic: Testing the RAM  (Read 1619 times)

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Offline ||C|-|E||

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Testing the RAM
« on: 03:43, 27 May 16 »
Hello!

I am in the process of upgrading my 464 Plus to a 6128 Plus and I already installed the RAM with the required capacitors and resistors, although I still cannot connect the floppy drive because an IC is missing  :picard: . The thing is that I would like to test if the RAM is OK or not and the only input method I have at the moment is the C4CPC. In there I have the Arnold 5 Diagnostic ROM so I used it to check the RAM. It detects 7 banks and says that all of them are fine after running the test. Of course, if I do the test but I remove one of the RAM chips it fails. This is great, but when I try to run one of the 128KB demos from the C4CPC I only see a black screen. So, I actually do not know if the test is reliable or the demos do not run for whatever other reason. Could you give me any advice?

Thank you!!  :-*

P.D: The RAM is installed is from NEC, with the reference D41464C-10

P.D: Since I already had some sleep and I am fresher now it think that tonight I am going to try to convert some 128KB demos myself with Nocart and then see what happens  :D
« Last Edit: 12:44, 27 May 16 by ||C|-|E|| »

Offline skywalky

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Re: Testing the RAM
« Reply #1 on: 15:18, 27 May 16 »
You have the gerald's RAM test.
Quick and dirty RAM test for CPC

Offline ||C|-|E||

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Re: Testing the RAM
« Reply #2 on: 15:30, 27 May 16 »
Yes, but it is for bank 0, as far as I understood, and I would like to test both banks  :) I ran GeraldĀ“s test yesterday, anyway, and everything was fine  :)

Offline TFM

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Re: Testing the RAM
« Reply #3 on: 18:20, 27 May 16 »
You can use the FutureOS for Cartridge, then enter the MONITOR. Then use the CONFIGURATION to select a RAM block between &C0,&C4, &C5.... &FF.


Then you can dump, edit, fill, copy etc. that RAM and play with it.  :)
TFM of FutureSoft
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Offline ||C|-|E||

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Re: Testing the RAM
« Reply #4 on: 18:40, 27 May 16 »
That is actually a good idea! Thank you!  :)

Offline gerald

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Re: Testing the RAM
« Reply #5 on: 18:43, 27 May 16 »
Yes, but it is for bank 0, as far as I understood, and I would like to test both banks  :) I ran GeraldĀ“s test yesterday, anyway, and everything was fine  :)
Try that one  ;)

Offline ||C|-|E||

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Re: Testing the RAM
« Reply #6 on: 18:45, 27 May 16 »
Thank you Gerald! I will do a cart image from this and check it!  :)

Offline gerald

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Re: Testing the RAM
« Reply #7 on: 18:49, 27 May 16 »
Thank you Gerald! I will do a cart image from this and check it!  :)
but ..... it's a cart image  :laugh:

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Re: Testing the RAM
« Reply #8 on: 19:32, 27 May 16 »
Oh! I said that because of the DSK extension :) I was expecting a BIN or a CPR  :D

Offline gerald

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Re: Testing the RAM
« Reply #9 on: 19:40, 27 May 16 »
Oh! I said that because of the DSK extension :) I was expecting a BIN or a CPR  :D
Oh boy, time for the week end to start  :picard2: :picard2: :picard2: :picard2: :picard2:
Here is the encarted version

Offline ||C|-|E||

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Re: Testing the RAM
« Reply #10 on: 20:07, 27 May 16 »
Glad to see that I am not completely crazy!  :laugh:

Offline ||C|-|E||

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Re: Testing the RAM
« Reply #11 on: 22:39, 27 May 16 »
It seems that everything works!  :D The computer still looks terrible, but we are in the good way  :)

[attachimg=1]

The RAM test

[attachimg=2]

STarKos running from a CPR image...

[attachimg=3]

That crappy 6128 demo from Amstrad...

[attachimg=4]

And the Arnold 5 Diagnostic ROM

[attachimg=5]

I later tested with FutureOS and it seems fine as well  :)

Today I received the last chip so, if I can, I will try to install the rest and test how it works.
« Last Edit: 22:41, 27 May 16 by ||C|-|E|| »

Offline TFM

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Re: Testing the RAM
« Reply #12 on: 00:30, 28 May 16 »
Looks good! Great! The problem with the demo... an it be that you have to set one pin of the ASIC different? May this be the cause?
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Offline ||C|-|E||

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Re: Testing the RAM
« Reply #13 on: 01:48, 28 May 16 »
I really have no idea about what happens with them  :picard: but the truth is when I execute the 128KB demos that are in the C4CPC I only see a black screen. If I connect the X-MEM, then it goes back to the firmware, but they do not load either. As far as I recall, this happens as well with my 6128 Plus when the X-MEM is connected, so I must have something not properly configured  :)

Offline gerald

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Re: Testing the RAM
« Reply #14 on: 09:59, 28 May 16 »
I really have no idea about what happens with them  :picard: but the truth is when I execute the 128KB demos that are in the C4CPC I only see a black screen. If I connect the X-MEM, then it goes back to the firmware, but they do not load either. As far as I recall, this happens as well with my 6128 Plus when the X-MEM is connected, so I must have something not properly configured  :)
The 128k demo where converted to cart using the original nocart. It's likely they expect the FDC to be present from the for the embeded AMSDOS ROM.
I think arnoldemu fixed that is his version.