4pc 1MB 3 Chip SIMM Memory 30-pin IBM PC 286 386 486 XT Computer Ram 4mb 1x9 | eBay
RMCretro (Neil) on Twitter: "This Amiga 1000 has 1mb Chip RAM courtesy of piggybacked chips, hot snot and a labyrinth of wiring. Has anyone seen this mod before? #Amiga #Commodore https://t.co/op2DDNtVh1" /
U61000 - Wikipedia
4MB RAM: 30-PIN Simm TI brand 70ns 3-chip (four of them) 1Mb ea set of 4 $45.00 - PicClick AU
Synchronous dynamic random-access memory - Wikipedia