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Content 4/4


Retro Commodore Amiga 500 512KB Trapdoor Memory Card

(A501 Clone without RTC)



This is a tested and working project.


Components

4pcs. 256K x 4Bit 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 unconnecting any device.



Have fun

Thank you




Mar 19,2020
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    • jordanyte from UNITED STATES OF AMERICA
      Ben Jordan is a board level electronics and embedded systems design engineer. Always an avid tinkerer, Ben started with his first soldering iron at the age of 8, designing and etching his own PCBs soon after. Ben is an expert in EDA with Altium, Protel, CircuitMaker and CircuitStudio and has a Bachelor of Engineering (CompSys) Hon I. from the University of Southern Queensland, Australia. He is an IPC-CID+ certified PCB designer, and makes training videos for Altium Academy.
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    • Jorge from SPAIN
      maker. I like to build things, to understand how things work. Co-founder of Ripolab Hacklab, a non-profit organization to explain the culture maker
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    • www.cursoderobotica.com
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    • Inventor of TV-B-Gone, a keychain that turns off TVs in public places. Co-founder of 3ware, a successful Silicon Valley startup in the 1990s. Pioneer of Virtual Reality in the 1980s. Author and teacher. I go around the world giving talks and workshops. Promoter of hackerspaces, open source hardware. Mentor for others wherever I goes. Co-founder of Noisebridge hackerspace in San Francisco. President and CEO of Cornfield Electronics. http://en.wikipedia.org/wiki/Mitch_Altman
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    • Emre KONCA from TURKEY
      I'm system engineer. https://www.youtube.com/ArduinoHaberTV
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