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5.2 RAM DISK EMULATION
Preparing The Program
The RAM disk program is on the Utilities side of your MultiRam disk. You will
need to save this program to another disk as it cannot be used directly from the
Utilities disk. The Utilities disk uses the ProDOS operating system. Programs
stored on a ProDOS disk cannot be directly transferred to a DOS disk. You will
need to use the Convert program, also found on the Utilities disk, to transfer
the RAM disk program for you.
Before you start, please initialize a blank disk with your DOS 3.3 System Master
disk. You will transfer the RAM drive program to this disk. You may want to use
this disk for an auto—boot disk as discussed later in this chapter. A DOS
formatted disk with files already on it say also be used if at least 10 sectors
remain on the disk. Place the DOS formatted disk in drive 2.
Boot the Utilities disk (the back of the MultiRam disk). Choose the
MULTIDRIVE.DOS from the menu. Follow the on—screen instructions and press the
appropriate key to run the Convert program which will convert the ProDOS based
binary file into a DOS based file.
The Convert screen should show “DIRECTION: PRODOS —----> DOS 3.3 S6,D2” at the
top of the screen. Press “R” to reverse direction if it does not. If you are
not using an external drive, press “C" to change to drive 1.
Press “T” to transfer the file. Use the right arrow key to copy over the prefix
than enter “MULTIDRIVE.DOS” and press the Return key. After the disk drives
stop, your DOS RAIl disk will be ready for use.
You may place your DOS disk with the “MULTIDRIVE.DOS” program on it in drive 1
and press Control+[Open—Apple]+Reset to boot the disk.
To rerun the Utilities menu. leave the Utilities disk in drive 1. Press
“Escape” to return to the Convert main menu. Press “Q” to quit the Convert
program. Press the “Return” key at the “LOAD WHAT SYSTEM PROGRAM?” prompt.
Installation
Install DOS 3.3 by booting your DOS SYSTEM MASTER diskette, or any other DOS 3.3
disk that leaves you with an Applesoft prompt. “I”. on the screen The DOS RAM
disk can be installed now in slot 3 from the keyboard by typing “BRUN
MULTIDRIVE.DOS.’
To install the RAM disk from within an Applesoft program, enter this line: PRINT
CHR$(4)”BRUN MULTIDRIVE.DOS.” The RAM disk program should be on the same disk
as the Applesoft program using this line. When the program is run, a message
appears telling you the number and size of RAM disk drives initialized.
Transferring Files
Files must be copied to and from the RAM disk using a file copier. FID. found
on the DOS 3.3 System Master, is easily used for this purpose. A disk copy
program, such as COPYA, will not work. If you use a file copier other than FID,
it must be able to copy files to and from disks that have more than 35 tracks.