BitsUndBolts BitsUndBolts

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Jean-Philippe Baud

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Gary Sands

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Components

	SMD 1206 100nF Ceramic Capacitor	x 2
	AMS1117-3.3	x 2
	3Pin PCB 1P2T Miniature Toggle Switch 2mm	x 1

Description

16MB (2x 16Mx4bit +3.3V) SIMM PCBs with dual power supply

This PCB allows you to build the highest capacity 30-pin SIMM modules for use in vintage hardware like 386 and 486 systems and probably also in sound cards like certain Creative SoundBlaster models that support 30-pin SIMM memory.

The PCB has the EDO-2-FPM mod integrated. Per switch, jumper, or solder, you can configure the PCB to either treat the chips as their default (switch set to EDO), or you can force EDO memory to operate in FPM (switch set to FPM).

More details and a use case in form of a 386 system can be found in the following video:

Cheers,

BitsUndBolts

Download Gerbers

Jun 22,2024

6,003 views

16MB (2x 16Mx4bit +3.3V) SIMM PCBs with dual power supply

2 Layers PCB 22.7 x 88.9 mm FR-4, 1.2 mm, 1, HASL with lead, Black Solder Mask, White silkscreen

EDO memory chips on old hardware? With the EDO-2-FPM mod integrated into the PCB, you can have high density memory in your retro gear!

6003

Published: Jun 22,2024

Standard PCB

Download Gerber file 178

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