orion128

An emulator of the Orion-128, a home computer built around the KR580VM80A processor (an i8080 clone).

orion128 emulates the hardware — memory-mapped video, the keyboard, ports and the disk controller — and runs the real ROM and software on top of it. It is built on the z80 package for the i8080 core and aims to stay in pure Python. The display is built on PySDL2 and numpy.

Norton Commander (NC.COM) running under CP/M, booted from a disk image:

NC.COM running under CP/M

It ships with the MS7007 Monitor and an ORDOS 4.03 ROM-disk, so it boots a working system out of the box:

orion128

--rk86 selects the RK-86 keyboard machine, with its own Monitor and keyboard layout, for software written for that keyboard. --z80 runs on the Z80 core, for software that uses Z80 instructions. --monitor PATH and --romdisk PATH replace the bundled ROMs.

Each extra argument is a file the emulator loads. An ORDOS program (.ORD or .BRU) is placed on the RAM-disk (drive B:). A disk image is put in a floppy drive; give several to fill the drives in turn:

orion128 PENX4$.ORD
orion128 system.img data.img

With a disk in the drive the Orion's own disk software runs: the ORDOS file manager copies files to and from disks, and CP/M boots from a system disk. Changes to a disk are kept in memory, so your image files are left as they are.

F12 is the RESET button. F10 closes the emulator.

Each PC key is mapped to the Orion key that gives the same character, so :, ; and # come out as expected, even though the Orion's own keyboard is laid out quite differently. Old games that scan the keyboard ports directly, like Manic Miner, keep working too.

The bundled ROMs are the copyright of their original authors and are not covered by this package's MIT licence; see orion128/ROMS.txt.

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