Atari didn't provide term power on the TT. This is supposed to be 5v on pin 26 of the internal connection and pin 25 of the external. This is the reason we have silly internal resistors that no other SCSI computer bothers with .... makes me wonder about their logic? Anyway, it is EASY to fix... follow this guide:
- TT SCSI PORT ACTIVE TERM PWR MOD.jpg (45.87 KiB) Viewed 4489 times
EXAMPLE INSTALLATION:
- PXL_20211210_204003169.jpg (521.72 KiB) Viewed 4489 times
You can now REMOVE all the internal resistors & use an EXTERNAL SCSI terminator on the rear port.