I don't think so... the IIsi is as every bit as soft-power as the IIci. Despite the different form factors, their PSUs have the same connector! You can use a IIcx/ci/vx, Quadra 700/650 or PowerMac 7100 PSU to power a IIsi -- on the bench, that is:
But instead of the discrete start-up circuit of the IIci, the IIsi goes the microcontroller way... that's why it doesn't have any programmer switches, the RESET and NMI signals are generated by the microcontroller from ADB key combos.
Back to the SE/30 project, quoting myself:
But instead of the discrete start-up circuit of the IIci, the IIsi goes the microcontroller way... that's why it doesn't have any programmer switches, the RESET and NMI signals are generated by the microcontroller from ADB key combos.
Back to the SE/30 project, quoting myself:
Just checked with the DMM, there's about 7.5 Kohm of resistance between the VIA port and the PDS pin -- enough to isolate a logic signal xx( Between the VIA pin and +5V I measure 3.8 Kohm, so it isn't just tied... the port should be strong enough for that reasonable pull-up. :?: