ST rev H & agranlund ram troubleshoot (solved)

[Steve]

Hey guys,

Just wondering about this, diagrom says memory test OK but yaart refuses to run and the desktop is corrupt:

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[czietz]

Most likely: CAS1H and CAS1L swapped.

[exxos]

What are all the bodge wires for ?

[Steve]

@czietz - thanks m8, you were right

- Seems I followed the instructions correctly, but I think @agranlund might have either the MMU pinout wrong or his silkscreen wrong:

Code: Select all

https://github.com/agranlund/STRam
MMU pins:
RAS1  = 18
CAS1L = 21
CAS1H = 22
MAD9  = 64

I did have CAS1L to 21 and CAS1H to 22 as described.

@exxos No bodge wires, I just routed the wires underneath the resistor legs to keep them neat.

[derkom]

Just wondering about this, diagrom says memory test OK but yaart refuses to run and the desktop is corrupt:

FYI, the Atari Diagnostic Software and DiagROM are two different things.

[Steve]

@derkom thx ;0

[exxos]

- Seems I followed the instructions correctly, but I think @agranlund might have either the MMU pinout wrong or his silkscreen wrong:

Code: Select all

https://github.com/agranlund/STRam
MMU pins:
RAS1  = 18
CAS1L = 21
CAS1H = 22
MAD9  = 64

I did have CAS1L to 21 and CAS1H to 22 as described.

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[Steve]

@exxos yes then the silkscreen on the 4mbstram board must be incorrect

[PhilC]

@exxos yes then the silkscreen on the 4mbstram board must be incorrect

Yes that is the case.

[exxos]

Yes that is the case.

It looks right to me tho

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