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C128-dcr dual sid

ytmytm·c128-dcr-dual-sid·kicad-c128d/C128DCR Dual SID.kicad_pcb

C128-dcr dual sid PCB layout, top view — open source board by ytmytm

About the C128-dcr dual sid PCB

C128-dcr dual sid is an open source PCB design by ytmytm, published on GitHub under the MIT license. It is a 2-layer board measuring 67.8 × 41 mm, with 19 components from 12 distinct parts.

Other key parts include the MOS_6581 and SID_ADAPTER. By type, the board carries 5 resistors, 4 jumpers, 4 capacitors, 2 ICs, 1 module and 1 connector.

It belongs with the audio and retro computing designs in this gallery.

From the project

Dual SID for C128DCR

This is a daughterboard that allows to have dual SID audio in a C128DCR. Although C128DCR has a huge case the space near SID and MMU is very awkward due to power supply.

This project is meant for two 8580 chips, as far as I know the only type installed in C128DCRs. But you never know, so just in case I left information about supporting 6581 SIDs too.

The goal of this project was to make the PCB fit in the narrow area between power supply and already installed 256K MMU expansion.

C128-dcr dual sid, from the project README
From the project README

Main components on the C128-dcr dual sid

MOS_6581SID_ADAPTER

C128-dcr dual sid bill of materials (BOM)

19 components, 12 distinct parts.

QtyPartRefs
2
MOS_6581
U1, U2
1
SID_ADAPTER
A1
1
~{CS}
J4
1
SEL1_Noise_reduction
JP1
1
SEL2_Noise_reduction
JP2
1
SEL1_digitboost
JP3
1
SEL2_digitboost
JP4
2
1M
RV1, RV2
2
100n
C1, C2
2
470pF*
C70, C71
2
220K
R1, R2
3
1k
R3, R4, R8

C128-dcr dual sid design files

The KiCad project lives in the ytmytm/c128-dcr-dual-sid repository on GitHub; these links point at the commit this page was built from.

C128-dcr dual sid: common questions

How big is the C128-dcr dual sid PCB?

The C128-dcr dual sid measures 67.8 × 41 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the C128-dcr dual sid?

19 components, from 12 distinct parts. The full bill of materials is listed on this page.

Where can I download the C128-dcr dual sid design files?

From the ytmytm/c128-dcr-dual-sid repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the C128-dcr dual sid design in my own project?

Yes, under the terms of its MIT license, which ytmytm chose for the repository.

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