North Star Horizon Z80 Computer Emulator (NSE) GTK+ Based

1978 North star Horizon ad.

NSE is a North Star Horizon Z80 Computer emulator for linux/unix systems. The North Star Horizon was an S100-Bus Z80 Computer which had one of the earliest floppy disk controllers at a time when most 'home computers' used extremely slow audio-cassette tapes to store programs and data.

NSE will run most of the North Star Computers disk image files which remain from the 1970's and 1980's.

This is the 2020 public release of the GUI emulator, following several previous ncurses-based releases going back to 1998. NSE is GTK+ based. The screen emulates either a TVI-920 or an ADM3A 'green screen' ASCII terminal while drop-down menus control disk-selection and other operator activities. NSE has the capability of using North Star hard-disk software as well as the North Star floppy-disk software.

This emulator has both single and double-density floppy controllers, a hard-disk controller, a Z80 CPU, and emulates most ancillary peripherals.

GUI-Interface North Star HORIZON Emulator screenshots.

GUI-Interface North Star HORIZON Emulator User Guide.

Download GUI-Interface 'NSE' source code

North Star floppy-disk images.

North Star Software & Hardware Manuals

North Star 'Compass' Magazines.

Miscellaneous CP/M Software

Extra Resources:

Harte Technologies for North Star Manuals

Dave's Old Computers for Lots of Stuff for Many Companies' Equipment.
He also has his own embedded systems software.

Dave's Old Computers Website for Dave Dunfield's North Star Horizon emulator for MSDOS.
If you have any queries, bug-fixes, or suggestions email me at

This was where the company was located during the early days in 1978 when I bought my Horizon:
 North Star Computers Address in 1978