STRAM 4MB Atari 520ST(M) Expansion
GITHUB: https://github.com/agranlund/STRam
Important
The board needs fixing with a bodge wire
Atari 520ST(M)
4MB RAM Expansion
Tested on C070243 Rev.I , your mileage may vary.
Important
The board needs fixing with a bodge wire
The expansion board must be installed
directly onto the motherboard.
Using sockets won't leave enough
clearance for the keyboard
BOM
Qty Component Value Size Package
C1 - C6 100nF 0805
R1 - R2 68Ω 0805
R3 33Ω 0805
2x 5118160 DRAM SOJ42
Installation
De-solder the existing RAM.
Solder the expansion board in place.
Solder the four wires from the expansion
board to the motherboard.
Signals: MAD9, CAS1L, CAS1H, RAS1
MAD9 can usually only be found on the MMU
The CAS & RAS pins can be soldered to on the
underside of the motherboard as well as,
on some boards, on the topside as well.
NameMMU PinRAS118CAS1L21CAS1H22MAD964
STRAM 4MB Atari 520ST(M) Expansion
*PCBWay community is a shared platform and we are not responsible for any design issues.
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- Engineer Apr 06,2024
- Francisco Meza Sep 16,2023
- Panagiotis Katsiris Sep 15,2023
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- David Hansen Jun 21,2023
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