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MacSnap SCSI Original Board

demik·MacSnap-SCSI·EDA/Original/MacSnap SCSI original.kicad_pcb

MacSnap SCSI Original Board layout, top view — open source board by demik
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About the MacSnap SCSI Original Board

MacSnap SCSI Original Board is an open source PCB design by demik, published on GitHub under the CERN-OHL-P-2.0 license. It is a 2-layer board measuring 78.2 × 80.9 mm, with 29 components from 18 distinct parts.

Other key parts include the MB_LOW, MB_HI, ROM_LOW, ROM_HI and DOV1. By type, the board carries 9 capacitors, 9 resistors, 6 ICs, 1 connector and 1 diode.

It belongs with the retro computing designs in this gallery.

From the project

SCSI interface by Dove Computer Corporation for Macintosh 512Ke

The MacSnap SCSI is an upgrade for the Macintosh 512K(e) It includes a SCSI controller and is designed to plug into the ROM slots It was developed by Dove Computer Corporation. This is a REcreation with a few improvements.

[Documentation]: https://github.com/demik/MacSnap-SCSI/tree/main/EDA/REloaded/README.md

[Button Documentation]: https://img.shields.io/badge/Documentation-FFDD21?style=for-the-badge&logoColor=white&logo=opensourcehardware

MacSnap SCSI Original Board, from the project README
From the project README

Main components on the MacSnap SCSI Original Board

MB_LOWMB_HIROM_LOWROM_HIDOV1DOV2

MacSnap SCSI Original Board bill of materials (BOM)

29 components, 18 distinct parts.

QtyPartRefs
1
MB_LOW
U1
1
MB_HI
U2
1
ROM_LOW
U3
1
ROM_HI
U4
1
DOV1
U5
1
DOV2
U6
1
Conn_01x03
J1
1
SCSI IDC-26
IDC26
1
SCSI IDC-50
IDC50
1
Z53C80
UZ53C80
1
1N4148
D1
6
0.1
C1, C2, C3, C5, C6, C7
1
1500pF
C4
2
10
C8, C9
3
10k
R1, R2, R3
1
470
R4
2
47
R5, R6
3
220/330
RN1, RN2, RN3

MacSnap SCSI Original Board design files

The KiCad project lives in the demik/MacSnap-SCSI repository on GitHub; these links point at the commit this page was built from.

MacSnap SCSI Original Board: common questions

How big is the MacSnap SCSI Original Board?

The MacSnap SCSI Original Board measures 78.2 × 80.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the MacSnap SCSI Original Board?

29 components, from 18 distinct parts. The full bill of materials is listed on this page.

Where can I download the MacSnap SCSI Original Board design files?

From the demik/MacSnap-SCSI repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the MacSnap SCSI Original Board design in my own project?

Yes, under the terms of its CERN-OHL-P-2.0 license, which demik chose for the repository.

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