[Reference Design Library](https://github.com/alxlab-zone66x/Reference_Design_Library)
![Mac DB15 to VGA v 1.0](docs/macintosh_portable_ram_expansion_card_design_guide.png)
# 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](../docs/books/Designing_Cards_and_Drivers_for_the_Macintosh_Family_3rd_Edition_1992.pdf#page=491). 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](docs/datasheets/J1_66527.pdf)
[pdf](docs/datasheets/J1_ENG_CD_532956_AF3.pdf)
[pdf](docs/datasheets/J1_ENG_CD_532956_AF3.pdf) |
Right-angle connector version:
| | Quantity | Product Number | Datasheet |
| ------------------------------------------------------------ | :------- | -------------- | ----------------------------------------------- |
|
| 1 | PPPC252LJBN-RC | [pdf](docs/datasheets/J1_Right-Angle_10494.pdf) |
## License
Connector Shield for Macintosh II-Family Computer by Alexandre Marcoux is licensed under a Creative Commons Attribution 4.0 International License.
## Community
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