| name | supported | description | year | publisher | cloneof | notes | roms | disks | rom_size | rom_size_text | disk_size | disk_size_text |
|---|
| mass | yes | Mass storage ROM for 9831 | 1977 | Hewlett-Packard | | | 1 | | 8192 | 8 Kilobytes (KiB) | | |
| matrix | no | Matrix/plotter ROM for 9831 | 1977 | Hewlett-Packard | | | 1 | | 2048 | 2 Kilobytes (KiB) | | |
