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agranlund / STRam

4MB RAM expansion for Atari 520ST(M)
GNU General Public License v2.0
38 stars 9 forks source link

Only seeing 2048k #5

Open sideburn opened 11 months ago

sideburn commented 11 months ago

I just installed one of these into a brand new old stock Atari 520 stm board (Rev h) and it’s only seeing 2048k. For it to be stable I have to leave RAS disconnected. If connected then the TOS menu and text is garbled and the machine crashes when launching an application. At one point I managed to get it to load sysinfo while RAS was connected but it still showed only 2048k.

Any ideas what could be the issue here?

oraclejedi commented 7 months ago

Had a similar issue on a Rev H motherboard. I found swapping CAS1L/CAS1H fixed it.

https://forums.atariage.com/topic/360236-atari-520st-4mb-agranlund-stram-expansion-notes-from-an-install/

sideburn commented 7 months ago

Had a similar issue on a Rev H motherboard. I found swapping CAS1L/CAS1H fixed it.

https://forums.atariage.com/topic/360236-atari-520st-4mb-agranlund-stram-expansion-notes-from-an-install/

Thanks I will have look. ** Yep! That was it. Swapped them and reconnected RAS and now I've got the full 4MB. Thanks!