Macintosh-HW/macintosh-portable
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macintosh-portable/README.md
Pawel Pieczul 05ea5294e3 Added reset circuit.
2019-06-12 17:09:23 +02:00

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macintosh-portable

Introduction

This is an attempt to reverse-engineer Macintosh Portable motherboard's power distribution and management subsystem.

  • The files can be opened and edited using KiCad.
  • Check out the PDF releases of the schematics.
  • You may take a look at my collection of vintage computers: oldcrap.org

V1M Hybrid Board

front resistors back

Apple Power Manager Chip (PMGR)

This is Mitsubishi M50753 Microcontroller with embedded EPROM.

M50753-pinout M50753-pins

Apple Sander-Wozniak Integrated Machine (SWIM)

This is a floppy controller chip, full chip spec is here. Pin 0 is in the top row of the chip, considering how the text is printed on it.

SWIM-pinout SWIM-pins

Versatile Interface Adapter (VIA)

This is G65SC22PE-2, full chip spec is here.

VIA-pinout VIA-pins