Since hard drives allocate storage in minimum blocks of 32K (typically), and Atom ROMs are so small (4K or 8K) it is efficient to store these ROMs in a single file.
| Atom_axr1.rom Atom_Basic.rom |
|
| Atom_BBC_BASIC_OS.rom | Operating System ROM for ATOM BBC BASIC upgrade (Also requires standard BBC BASIC ROM) |
| Atom_Combox.rom | |
| Atom_Demo.rom | Atom Demo ROM |
| Atom_DOS.rom | c431a9b7 dosrom.rom |
| Atom_Econet.rom | |
| Atom_FloatingPoint.rom | |
| Atom_FloatingPoint2.rom | maybe same as above |
| Atom_gags.rom | |
| Atom_Kernel.rom | c604db3d maybe same as Atom_DOS? |
| Atom_Mousebox.rom | |
| Atom_pcharme.rom | An interpreter for structured BASIC. By Frans van Hoesel |
| Atom_salfaa.rom | |
| Atom_Toolkit.rom | |
| Atom_unknown.rom | |
| Atom_werom.rom | |
| Atom_Windows.rom | |
| BBC_MOS_1_2.rom | |
| BBC_BASIC_4.rom |
A detailed description of how the Atom firmware works can be found in a book called: Splitting the Atom.