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# macintosh-portable
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## Introduction
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This is an attempt to reverse-engineer **Macintosh Portable** motherboard's power distribution and management subsystem.
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* The files can be opened and edited using [KiCad ](http://www.kicad-pcb.org/ ).
* Check out the [PDF releases ](https://github.com/ppieczul/macintosh-portable/releases ) of the schematics.
* You may take a look at my collection of vintage computers: [oldcrap.org ](https://oldcrap.org )
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## V1M Hybrid Board
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![front ](pictures/macintosh-portable-v1m-front.jpeg )
![resistors ](pictures/macintosh-portable-v1m-resistors.jpeg )
![back ](pictures/macintosh-portable-v1m-back.jpeg )
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## Apple Power Manager Chip (PMGR)
This is [Mitsubishi M50753 ](http://www.bitsavers.org/components/mitsubishi/_dataBooks/1989_Mitsubishi_Single-Chip_8-Bit_Microcomputers.pdf ) Microcontroller with embedded EPROM.
![M50753-pinout ](pictures/macintosh-portable-PMGR-M50753-pinout.png )
![M50753-pins ](pictures/macintosh-portable-PMGR-M50753-pin-description.png )