The RISC OS 5.15 IOMD ROM recently made available on the ROOL website will run on versions of RPCEmu Spoon Edition 0.8.4 or later. However many caveats apply, not least that RPCEmu Spoon Edition and RISC OS 5.15 on IOMD are both of alpha quality.

Limitations

As the list below indicates, it's not possible to yet run a RISC OS boot sequence, which limits the usefulness of this ROM image.

• Does not support IDE harddiscs or CDROM. [1]
• Only works on A7000 machines. [1]
• Only supports 8MB RAM and 0MB VRAM. [1]
• Hardware scrolling does not work, leading to graphical glitches. eg. F12 to get to a command prompt. [1]
• Resets CMOS RAM (configuration) on machine reset. [1]
  Leading to the inability to boot from HostFS and the requirement to reconfigure mousetype on every boot.
• Does not support RPCEmu mouse following.

[1] Known Issue with ROOL ROM, affects real hardware too.

Required configuration

Edit the rpc.cfg file and make the following changes.

mouse_following = 0
cpu_type = ARM7500
mem_size = 16
vram_size = 0

mem_size is set to 16 (8MB in each bank), but only 8MB RAM will be in use in the emulator.

On running

RISC OS 5.15 will boot to a supervisor prompt. Configure the mousetype and enter the desktop.

*configure mousetype 3
*desktop