Macintosh-HW/macintosh-portable
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Macintosh Portable Reverse Engineered Schematics
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Pawel Pieczul bd6d14b59b More progress on PMGR chip
2019-06-16 22:44:12 +02:00
pictures Added reset circuit. 2019-06-12 17:09:23 +02:00
.gitignore More progress on PMGR chip 2019-06-16 22:44:12 +02:00
LICENSE
macintosh-portable-12v-generator.sch More progress on PMGR chip 2019-06-16 22:44:12 +02:00
macintosh-portable-pmgr.sch More progress on PMGR chip 2019-06-16 22:44:12 +02:00
macintosh-portable-power-distribution.sch More progress on PMGR chip 2019-06-16 22:44:12 +02:00
macintosh-portable-ttl-logic.sch More progress on PMGR chip 2019-06-16 22:44:12 +02:00
macintosh-portable-v1m.sch More progress on PMGR chip 2019-06-16 22:44:12 +02:00
macintosh-portable.dcm Symbol library cleanup 2019-06-01 12:17:55 +02:00
macintosh-portable.kicad_pcb First version of schematics. 2019-05-22 01:17:37 +02:00
macintosh-portable.lib Symbol library cleanup 2019-06-01 12:17:55 +02:00
macintosh-portable.pro Finished V1M, more references on other sheets. 2019-05-28 00:10:25 +02:00
macintosh-portable.sch More progress on PMGR chip 2019-06-16 22:44:12 +02:00
README.md Added reset circuit. 2019-06-12 17:09:23 +02:00
sym-lib-table Symbol library cleanup 2019-06-01 12:17:55 +02:00

README.md

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