there are propably only two possibilities.
1. Shortcut against ground or vcc. Might be caused by a borked ttl chip or resistor.
2. another driver driving on the same net the same time ramsey is active.
At first I'd check all data and address lines from/to ramsey for short curcuits against vcc/gnd. If thats not the cause then have a look at the schematics and check for possible ttls or gals with connections to ramsey. At first possibly only with connections to ramsey as other parts don't seem to get hot.
