ROM Drive as the Boot Device
To boot your computer with the ROM Disk:1.) You should already have your ROM Disk set to the size you want.2.) Copy the system files needed to boot the operating system you want to use.*Important! When copying the boot files with the Finder, you’ll need to open the disk icon, use the Select All option, then drag all the files from
the boot disk to the ROM disk. Simply dragging the System Disk icon to the AEROM will put the boot files in a folder and the computer will give you an Unable to load ProDOS” error.
◊If you plan to run only one application from your ROM Disk, you could simply copy the application’s boot disk to the ROM Disk (the application must not be copy protected). Then copy the other program files to the ROM Disk.
◊If you want to use the Finder, copy the files necessary to run the Finder from the Apple IIGS System Disk. The IIGS System Utilities Manual is a great reference source for setup information.
*Remember: If you want to access RamKeeper’s firmware in ProDOS 16, you’ll need to copy the
AERAMKEEPER file to the Desk Accessories folder in the System folder.
3.) Set your ROM Disk as your Startup Slot.a)Enter the Classic Desk Accessories menu.b)Select the Control Panel option.c)Choose the option, Slots.
d)Select Startup Slot.
e)Use the left or right arrow to select ROM Disk.
f)Press 
4.) Reboot the GS.
Hold down the 
and 
keys then press the reset button. This is almost the same as turning your computer off and back on but it doesn’t reset the RAM Disk and it saves a lot of wear and tear on the switch.