• CPU: Zilog Z80 4 MHz
• RAM: 64K
• ROM: 4K
• Text Modes: 80 x 25
• Video: 640×200 LCD (built-in)
• Storage: 3.5” floppy diskette (built-in)
• I/O: Parallel, Serial
• OS: CP/M
• Expansion: Limited internal expansion

MESS currently supports the bw2 emulation with two floppy drives, “floppydisk1” (flop1) and “floppydisk2” (flop2), for disk images in .dsk format.

Also notice that the “printer” (prin) and the “serial” (serl) port are emulated as well.

This system requires full keyboard emulation to work correctly. At startup, full keyboard emulation mode is enabled by default. Whilst in full keyboard emulation mode, some key associated functionality may be disabled (like the ESC key for EXIT). The keyboard emulation mode is toggled using the “Scroll Lock” key (by default).

Different versions of the Bondwell Model 2 roms are supported. You can switch between them, changing the -bios parameter. At command line,

"-bios 0" or "-bios 20" = BW 2 v2.0

"-bios 1" or "-bios 12" = BW 2 v1.2

Different RAM configurations are possible for the bw2 in MESS. You can switch between them, changing the -ramsize parameter. At command line, you simply have to add -ramsize ram_value, where ram_value can assume one of the following values

64k (default)
96k
128k
160k
192k
224k

The Bondwell 2 was a late CP/M machine, designed and shipped towards the end of the lifecycle of the OS.

It is, however, a true portable computer running CP/M, which is quite rare.

(info from vintage-computer.com)

• Model 2 at vintage-computer.com