During steady state Q1 is open, which keeps Q2 closed. So reset is high during normal operation, just like any other MCU.
And I could only google some repair manuals, not the datasheets. If you are judging by not having a line over the RESET name, then I would not trust that. If there is some test that explicitly stated that reset is active high, then where it is?
Also, I found a manual where RES pin is marked as active negative. And the same exact circuit is used.