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Alexandre Marcoux 3aec298bc3 Add Macintosh Portable RAM Expansion Card reference design		2022-02-06 20:42:15 -05:00
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README.md	Add Macintosh Portable RAM Expansion Card reference design	2022-02-06 20:42:15 -05:00

README.md

Reference Design Library

Mac DB15 to VGA v 1.0

Macintosh Portable RAM Expansion Card

This is the Kicad 6 schematics and PCB with connector to serve as the basis to make a Macintosh Portable RAM expansion card. The PCB was designed based off the dimensions shown on page 450 of the Designing Cards and Drivers for -the Macintosh Family Third Edition. I made two versions of the board with different connectors. One uses the original AMPMODU Mod II / Mod IV connector and the other uses a cheaper and easier to get female right-angle 50-pin connector.

Note that the schematic symbol for the connector notes the pins names for the M5120 non-backlit Macintosh Portable. For M5126 backlit Macintosh Portable pins 28 and 32 are defined as /RAM.CS and /REFRESH instead of /AS and /DELAY.CS respectively.

Bill of Materials

AMPMODU Mod II / Mod IV connector version:

Image	Quantity	Product Number	Datasheet
	1	66527-025LF 5-532956-8 5-534204-1	pdf pdf pdf

Right-angle connector version:

	Quantity	Product Number	Datasheet
	1	PPPC252LJBN-RC	pdf

License

Connector Shield for Macintosh II-Family Computer by Alexandre Marcoux is licensed under a Creative Commons Attribution 4.0 International License.

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