I've been working on recreating the INTERNATIONAL (revision D) analog board for quite a while.
This INTERNATIONAL board can be reconfigured to both 110V as 240V, although i have not test 110V setup yet. This revision board should be able to replace any revision (A/B/C/D) board, both US as INTERNATIONAL.
Although there is a lot of information about the US board to be found on- and offline, there is nearly no information about the INTERNATIONAL 240V boards. Larry Pina do refer to 'INTERNATIONAL' boards in his books, but I discovered that this refers to the first revision INTERNATIONAL board and that these do not correspond to the later variants like the later 820-0107-D revision.
So i decided to start from the beginning; I did reverse engineered the 240V power circuit and did redraw schematic which is used by this board.
The power schematics are added to the GIT repository.
I did add a 'usual suspect' section and added BOM to the GIT repo which should help by troubleshooting non-working 240V boards to bring them back to life on new boards.
After deploying multiple boards, finetuning the recreation and continuing implementing improvements the day has come: I finished my work and published it to my github.
The files, schematic and BOM can be found overhere:
github.com
Have fun with it!
Cheers,
Daan
This INTERNATIONAL board can be reconfigured to both 110V as 240V, although i have not test 110V setup yet. This revision board should be able to replace any revision (A/B/C/D) board, both US as INTERNATIONAL.
Although there is a lot of information about the US board to be found on- and offline, there is nearly no information about the INTERNATIONAL 240V boards. Larry Pina do refer to 'INTERNATIONAL' boards in his books, but I discovered that this refers to the first revision INTERNATIONAL board and that these do not correspond to the later variants like the later 820-0107-D revision.
So i decided to start from the beginning; I did reverse engineered the 240V power circuit and did redraw schematic which is used by this board.
The power schematics are added to the GIT repository.
I did add a 'usual suspect' section and added BOM to the GIT repo which should help by troubleshooting non-working 240V boards to bring them back to life on new boards.
After deploying multiple boards, finetuning the recreation and continuing implementing improvements the day has come: I finished my work and published it to my github.
The files, schematic and BOM can be found overhere:
GitHub - daanvdl/Macintosh-Analogboard: Macintosh 128K/512K/Plus Analogboard recreation (820-0107-D)
Macintosh 128K/512K/Plus Analogboard recreation (820-0107-D) - daanvdl/Macintosh-Analogboard
github.com
Have fun with it!
Cheers,
Daan
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