The first thing I always do is power on the device.

I was greeted with this screen.

I wasn't quite sure what to do, so naturally I disassembled the machine and took a look inside.

  • The logic board looked surprisingly clean. Finding no obvious issues with the motherboard, I proceeded to find some documentation on the internals of the Macintosh SE. Below I list some documents which proved rather helpful.
  • Macintosh Family 2nd Edition May 1990
  • Motorola 68K Microprocessor Datasheet
  • http://www.ccadams.org/se/pinouts.html Macintosh SE Schematics and Pinout
  • Macintosh Family Hardware Reference

With respect to the large body of knowledge that I gleaned from these resources, the following pieces of information largely determined my next steps.

  • The CRT will behave like a 100KV capacitor if improperly handled
  • The Macintosh SE has a Processor Direct Slot - The 1980s equivalent of a PCIE slot
  • The Macintosh SE System I kernel partially resides on board in a ROM
  • The SE uses a BBU which is essentially a very primitive MMU/bus arbiter

To Do List

  • Remove CopyRighted Material and insert legal reproductions
  • Refresh Board
    • Itemize components on board
    • Remove all capacitors and Resistors
    • Scrub Board with Alcohol
    • Install newly purchased components
  • Add updates to display controller
    • Display Text
    • Take text input from keyboard - (also useful to gain experience with UART for writing automatic C based prober in the future.)
  • Test SUMP2
  • Design PCB for FPGA with memory and Voltage level shifter
  • Design PCB that house the HIGH and LOW roms and captures contents to verify.

If no success by this point:

  • Determine Faulty component and replace - if not replaceable logic, wrtie FPGA implementation, reflow board, and seat FPGA into logic board.)
  • macintosh_se.txt
  • Last modified: 2018/10/15 11:47
  • by yehowshua