Installed the JROK code and the DS1220 NVRAM chip on a Mr. Do's Castle for a forum member and ran into a problem...
The board wouldn't boot with the DS1220 installed. It would boot when probing the lower address pins with my logic probe... otherwise it would sit stuck in watchdog.
Installed a 9 pin 470 ohm SIP resistor pack on the first 8 address lines and tied the 9th pin to +5v and the board boots every time.
Just thought I'd pass that along if you run into troubles with installing that.
RJ
The board wouldn't boot with the DS1220 installed. It would boot when probing the lower address pins with my logic probe... otherwise it would sit stuck in watchdog.
Installed a 9 pin 470 ohm SIP resistor pack on the first 8 address lines and tied the 9th pin to +5v and the board boots every time.
Just thought I'd pass that along if you run into troubles with installing that.
RJ

