Based on the project of PeteAU, http://pibus.info/amiga/pa501/

Amiga 500/500+ Memory and RTC Board

Tested on M/B Rev 5, 6, 8 (PAL & NTSC)

Part    Value         Device       

100K    100K          resistor 1% 0805 1/4W

BAT1    Li Battery    CR2032

C1      0.1uF         MLCC 0805 X7R 10V

C2      100nF         MLCC 0805 X7R 10V

C3      100nF         MLCC 0805 X7R 10V

C4      100nF         MLCC 0805 X7R 10V

C5      100nF         MLCC 0805 X7R 10V

C6      22uF          MLCC 0805 X7R 10V

C7      100uF          10V Aluminium Electrolytic lead space 2mm diameter 5mm Radial

C8      22uF          MLCC 0805 X7R 10V

C9      100nF         MLCC 0805 X7R 10V

CLOCK                  1X2    Pin Header Connector

CNY                    2X20   Pin Header Connector

CNY2                   2X8    Pin Header Connector

D1      BAT721C       BAT54C SOT23 

ENABLE                 1X2    Pin Header Connector

POWER   LED     2.2V 20mA 0805

R1      10K           resistor 1% 0805 1/4W

R2      10K           resistor 1% 0805 1/4W

R3      10K           resistor 1% 0805 1/4W

R4      470           resistor 1% 0805 1/4W

R5      470           resistor 1% 0805 1/4W

R6      1K            resistor 1% 0805 1/4W

R7      100K          MLCC 0805 X7R 10V

RAM1    1Mx16bit      DRAM   SOJ40

RAM2    1Mx16bit      DRAM   SOJ40

RTC     RTC-62423A    SOP24