ST rev H & agranlund ram troubleshoot (solved)

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PhilC
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Re: ST rev H & agranlund ram troubleshoot (solved)

Post by PhilC » Tue Jun 15, 2021 7:44 pm

@exxos yeah that's what I thought but nope, had to swap the two over, otherwise the byte order got swapped.
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Re: ST rev H & agranlund ram troubleshoot (solved)

Post by exxos » Tue Jun 15, 2021 8:16 pm

PhilC wrote:
Tue Jun 15, 2021 7:44 pm
@exxos yeah that's what I thought but nope, had to swap the two over, otherwise the byte order got swapped.
Doesn't make sense as BANK 0 is basically the same and that would mean that would have to be swapped as well :stars:
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viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
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Re: ST rev H & agranlund ram troubleshoot (solved)

Post by exxos » Tue Jun 15, 2021 8:19 pm

Can someone check the highlighted pin does actually go to MMU pin 6 on the MMU...

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viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
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Re: ST rev H & agranlund ram troubleshoot (solved)

Post by Steve » Wed Jun 16, 2021 11:16 am

@exxos I tried buzzing it today and no it doesn't.
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Re: ST rev H & agranlund ram troubleshoot (solved)

Post by exxos » Wed Jun 16, 2021 12:17 pm

Steve wrote:
Wed Jun 16, 2021 11:16 am
@exxos I tried buzzing it today and no it doesn't.
Thanks,, just sure it be be going by 68R maybe.

It could be the issue., not that cas1 lines are wrong , the ones on the PCB are wrong...
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Re: ST rev H & agranlund ram troubleshoot (solved)

Post by dragmar » Fri Jul 16, 2021 9:33 am

@Steve you managed to run 4MB ram from @agranlund. I started the assembly but I can't start it properly

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Re: ST rev H & agranlund ram troubleshoot (solved)

Post by PhilC » Fri Jul 16, 2021 10:04 am

dragmar wrote:
Fri Jul 16, 2021 9:33 am
@Steve you managed to run 4MB ram from @agranlund. I started the assembly but I can't start it properly
What is it you need to know?
If it ain't broke, test it to Destruction.

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Re: ST rev H & agranlund ram troubleshoot (solved)

Post by dragmar » Fri Jul 16, 2021 10:08 am

I have everything soldered according to https://github.com/agranlund/STRam

Do I have to make a mod for 4MB to work properly?

Is it enough to do as described by @agranlund

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Re: ST rev H & agranlund ram troubleshoot (solved)

Post by PhilC » Fri Jul 16, 2021 10:32 am

@dragmar yes, remove all the ram first, then install the ram board and then connect up the wires but note that CAS1H and CAS1L are incorrect and need be swapped over.
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