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23 lines
990 B
Markdown
23 lines
990 B
Markdown
# 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/).
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* Check out the [PDF releases](https://github.com/ppieczul/macintosh-portable/releases) of the schematics.
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* 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)
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![resistors](pictures/macintosh-portable-v1m-resistors.jpeg)
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![back](pictures/macintosh-portable-v1m-back.jpeg)
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## Apple Power Manager Chip (PMGR)
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This is [Mitsubishi M50753](http://www.bitsavers.org/components/mitsubishi/_dataBooks/1989_Mitsubishi_Single-Chip_8-Bit_Microcomputers.pdf) Microcontroller with embedded EPROM.
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![M50753-pinout](pictures/macintosh-portable-PMGR-M50753-pinout.png)
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![M50753-pins](pictures/macintosh-portable-PMGR-M50753-pin-description.png)
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