Design description of the Nova 3 Cartridge Disk Emulator on the Stanford Emmy system

Technical Report · Thu Jun 01 04:00:00 EDT 1978

OSTI ID:6795973

Hafeman, D R

The emulation of a Nova 4047A Cartridge Disk System on the Stanford Emmy is described. The Cartridge Disk Emulator (CDE) serves as a peripheral to a Nova 3 processor emulator, also installed on the Emmy. With a disk system, DG disk-based operating systems can be installed; a wide range of programs can thus be studied. The Cartridge Disk Emulator uses the Mini UNIX system to provide I/O services and manage the physical disk resources. CDE transforms Nova I/O commands into UNIX file access requests and processes all status resulting from those requests. All other peripheral emulators currently installed on Novaem are small, simple programs that may easily be understood from the program listing. CDE, however, is in itself a very complex program. It is comparable in complexity and code space to the entire Nova Code Emulation Program. Therefore, a document dedicated to its description is required. Appendix A of this document discusses how to add a new peripheral to NovaemU and NovaemCD. 1 figure, 1 table.

• Research Organization: Stanford Univ., CA (USA). Digital Systems Lab.
• OSTI ID: 6795973
• Report Number(s): SU-326-P.39-29
• Country of Publication: United States
• Language: English

Related Subjects

99 GENERAL AND MISCELLANEOUS
990200* -- Mathematics & Computers
ANALOG SYSTEMS
COMPUTERS
DESIGN
FUNCTIONAL MODELS
MAGNETIC DISKS
MAGNETIC STORAGE DEVICES
MEMORY DEVICES
PROGRAMMING
SIMULATION
SIMULATORS