HardLabs

A500-DRAM-Board

kr239·A500-DRAM-Board·schematics/DRAM Board.kicad_pcb

A500-DRAM-Board layout, top view — open source board by kr239

About the A500-DRAM-Board

A500-DRAM-Board is an open source PCB design by kr239, published on GitHub under the GPL-2.0 license. It is a 2-layer board measuring 99.1 × 69.9 mm, with 42 components from 5 distinct parts.

Other key parts include the IS41C16257. By type, the board carries 16 diodes, 9 modules, 6 capacitors and 2 ICs.

It belongs with the retro computing designs in this gallery.

From the project

Replace the old 44256 DRAM chips on your A500 with newer EDO memory

Remember to grab the A500 Parts Library so that you have the correct footprints.

Main components on the A500-DRAM-Board

IS41C16257

A500-DRAM-Board bill of materials (BOM)

42 components, 5 distinct parts.

QtyPartRefs
2
IS41C16257
U1, U2
9
Conn_01x01
a0, a1, a2, a3, a4, a5, a6, a7 +1
9
Conn_01x01
/bras0, /bras1, gnd_u19, gnd_u20, gnd_u23, vcc_u17, vcc_u19, vcc_u20 +1
16
Conn_01x01
d0, d1, d2, d3, d4, d5, d6, d7 +8
6
0.1uF
C1, C2, C3, C4, C5, C6

A500-DRAM-Board design files

The KiCad project lives in the kr239/A500-DRAM-Board repository on GitHub; these links point at the commit this page was built from.

A500-DRAM-Board: common questions

How big is the A500-DRAM-Board?

The A500-DRAM-Board measures 99.1 × 69.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the A500-DRAM-Board?

42 components, from 5 distinct parts. The full bill of materials is listed on this page.

Where can I download the A500-DRAM-Board design files?

From the kr239/A500-DRAM-Board repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the A500-DRAM-Board design in my own project?

Yes, under the terms of its GPL-2.0 license, which kr239 chose for the repository.

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