Blimey Henno, you're bringing up some old memories here. PIP (Peripheral Interface Program) was indeed the general dog's body prog that did everything. I learned this stuff under CP/M 2.1 & 2.2, before I lost the flame with MP/M 3.0 (whooaa - multi-tasking with 3 serial terminals and a 5M Hard disk - no, sorry - Winchester Drive!)