Hi guys,
Looking to get some direction before I place an order in Exxos's store. I would like to upgrade my A520STM with the following:
SQUARE PIN CONNECTOR STRIP - 2 pieces [0158]
ST/F/M 6 CHIP TOS 1.04 USA [0124]
STM 4MB RAM UPGRADE [0240]
I am using a local installer to do this for me, as it's beyond my soldering skills.
Does the above look right to have all components needed to upgrade TOS to 1.4 and ram to 4MB?
TOS 1.4 should be a drop-in replacement, right? Or does this require additional modification in order to work?
Attached is a picture of my actual motherboard.
Atari 520STM TOS 1.4 and 4MB ram upgrade.
Re: Atari 520STM TOS 1.4 and 4MB ram upgrade.
Looks correct.
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxosforum.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 ~
People should find solutions to problems, not find problems with solutions.
https://www.exxosforum.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 ~
People should find solutions to problems, not find problems with solutions.
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- Posts: 2
- Joined: Mon Nov 20, 2023 7:25 pm
Re: Atari 520STM TOS 1.4 and 4MB ram upgrade.
Excellent. Thank you sir. Order placed. 
