Osborne Executive OCC2 Schematic
The Osborne Executive OCC2 Schematic is Osborne Computer Corporation's schematic set for the Osborne Executive, in 15 sheets. "OCC2" was Osborne's internal designation for the machine.
Sheets cover the oscillator, CPU, memory and I/O timing; CPU and reset; modem; ROM; video RAM timing and RAM select; video timing; video address multiplexer; video RAM; font RAM; video and sync output; serial I/O; the floppy disk controller interface; the parallel interface; and the keyboard interface.
It contains no parts list. Component values appear on the drawings themselves and must be read sheet by sheet — and the scan has no text layer, so they cannot be searched. Transcribing them into a sourced table is outstanding work.
This is currently the only component-level source on this wiki for the Executive; the service manual covers assembly and disassembly procedures but carries no bill of materials.
Download here: Osborne Executive OCC2 Schematic.pdf