Disconnected each wire on the DB9 to test effect on video:
1. Screen brighter...blue cast
2. No Effect
3. Green Cast
4. Orange Cast
5. Maybe Dimmer.
6. Screen Dimms ( i connected to 7 and the screen brightened to same levels as 6)
7. N/A
8. Kills signal
9. Kills signal
I also swapped 8 and 9...
I have a DisplayServer SE setup to display a Portrait Monitor along with the built in Monitor for the Macintosh SE.
As a first crack at decoding the video I checked the voltages with a Multi-Meter on the DB9:
1. Ground
2. Ground
3. 1.2K Ohm Resistance
4. 1.5K Ohm Resistance
5. 1.5K Ohm...
Cool article on how to connect a Raspberry Pi to a Mac Classic CRT to output the Raspberry Pi display...
Could be useful in Mac Classics totally destroyed by cap or battery leakage to at least be used under emulation on the Pi while appearing stock. Might also be useful for creating a custom...
Thanks for the reply...do you remember the value of the resistor network at RN1 for the adapter board? Please let me know as this is the last item I need to order to make a board.
Thank you for the resistor values...the resistor pack in the attached photo is the item I need to ID...an actual part number would be helpful if someone has that as I'm an electronics newb but can cross-reference.
I'm looking at the ROM board to create custom ROMs with ROM Disks for booting the...
Kai Robinson had a post on another forum with a PCB for replacing Mac SE ROMs with common EPROMs. Do we know the resistor rating for the RN1?
I attached the gerbers for that board from the post.
https://68kmla.org/bb/index.php?threads/macintosh-se-eeprom-to-rom-adapter.37766/