Memory expansion for Amiga 500+ by 1MB or 512kb for Amiga 500 and connector modul RTC.

You can install 1 or 2 512kb RAM chips a RTC modul

For A500 it is enough to install only U1 RAM - 512kb slow RAM, for A500+ U1,U2 - 1MB chip RAM

JP1 - on/off slow RAM only for A500 (A500+ off)

I used 512kb RAM chips V53C16258HK35 SOJ-40

Other chips should also work, but I haven't tested them.

(AS4C256K16E0-50JC , HY514260BJC-70 , IC41C16257-35K , V53C16256HK50 , V53C16258SHK50)

Components RAM:

2x IC RAM V53C16258HK35 SOJ-40 U1,U2 (for a500 only U1 is enough)

6x capacitor 100nf 0805 C1,C2,C3,C4,C5,C6

1x capacitor 10uF - 100uF electrolytic capacitor - tantal smd or through hole radial lead (for better stability) C7

1x 2 pin 2.54mm (jumper) JP1

1x Goldpin strip 2x40 female 2.54mm pitch (2x28) J1

1x 2x12 goldpin plug, angled, pitch 2.54 mm J2

Tested A500 Rev 5, 6

A500+

RTC module: RTC for Amiga 500