Labels:text | diagram | plan | technical drawing | schematic OCR: osc IN SHITCHES: DD/HD DISK- PRESENT HTRXD SELLOT HD/DD DRIVE SCHEME +5v (EXTERNAL DRIVE> osc OUT +5u DOTTED AREAS CAN BE REPLACED BY AN AND GATE MOTORON DRESET Cc +5v +5v 7438 +5v | pull-up resistor READY