ST rev H & agranlund ram troubleshoot (solved)

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Steve
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ST rev H & agranlund ram troubleshoot (solved)

Post by Steve » Tue Jun 15, 2021 11:28 am

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
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Re: ST rev H & agranlund ram troubleshoot

Post by czietz » Tue Jun 15, 2021 11:41 am

Most likely: CAS1H and CAS1L swapped.

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Re: ST rev H & agranlund ram troubleshoot

Post by exxos » Tue Jun 15, 2021 11:59 am

What are all the bodge wires for ?
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Re: ST rev H & agranlund ram troubleshoot

Post by Steve » Tue Jun 15, 2021 12:23 pm

@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.
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Re: ST rev H & agranlund ram troubleshoot

Post by derkom » Tue Jun 15, 2021 12:27 pm

Steve wrote:
Tue Jun 15, 2021 11:28 am
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.

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Steve
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Re: ST rev H & agranlund ram troubleshoot

Post by Steve » Tue Jun 15, 2021 12:29 pm

@derkom thx ;0
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Re: ST rev H & agranlund ram troubleshoot

Post by exxos » Tue Jun 15, 2021 12:41 pm

Steve wrote:
Tue Jun 15, 2021 12:23 pm
- 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.

Capture.PNG
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https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~

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Steve
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Re: ST rev H & agranlund ram troubleshoot

Post by Steve » Tue Jun 15, 2021 1:16 pm

@exxos yes then the silkscreen on the 4mbstram board must be incorrect
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Re: ST rev H & agranlund ram troubleshoot

Post by PhilC » Tue Jun 15, 2021 4:16 pm

Steve wrote:
Tue Jun 15, 2021 1:16 pm
@exxos yes then the silkscreen on the 4mbstram board must be incorrect
Yes that is the case.
If it ain't broke, test it to Destruction.

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Re: ST rev H & agranlund ram troubleshoot

Post by exxos » Tue Jun 15, 2021 7:30 pm

PhilC wrote:
Tue Jun 15, 2021 4:16 pm
Yes that is the case.
It looks right to me tho :shrug:

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https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~

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