Elevate your Commodore Amiga 500's memory capacity with this high-quality 512KB Trapdoor Memory Expansion PCB. This expansion board offers a reliable and efficient way of increasing the memory of your vintage computing device, allowing for smoother and more efficient usage. Crafted with precision and care, this Commodore memory expansion PCB is a must-have accessory for any vintage computing enthusiast. With its flawless design and top-of-the-line features, it is the perfect addition to your collection.

  • Retro Commodore Amiga 500 512KB Memory Expansion

  • (A501 Clone without RTC)

  • This is a tested and working project.

  • Components:

  • 4pcs. 256K x 4Bit DIP-20 Dynamic RAMs

  • 13pcs. 39 ohm 1/4 wattt resistances

  • 4pcs. 100nf ceramic capacitors

  • 1 piece toggle switch

  • 1 piece 2x28 pin female header. (get 2x40 pin and cut it)

  • Some of compatible 256K x 4Bit dynamic RAMs list: (You can find from Aliexpress)

  • MB81C4256 (Fujitsu)

  • GM71C4256 (Goldstar)

  • HM514256 (Hitachi)

  • HY534256 (Hyundai)

  • MT4C4256 (Micron)

  • M5M44256 (Mitsubishi)

  • MCM514256 (Motorola)

  • MSM514256 (Oki)

  • KM44C256 (Samsung)

  • TMS44C256 (Texas Instruments)

  • TC514256 (Toshiba)

  • LC324256 (SANYO)

  • UPD424256 (NEC)

  • In order to protect your electronical devices, always turn off your Amiga before connecting or disconnecting the cables or any other device.