Color Computer CoCo SDC, Руководство пользователя

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12 | Chapter 3
DRIVE – Mounting SD Based Images
The DRIVE command is multi-faceted. As
stated above, issuing just the DRIVE command
will give you a status on the CoCo SDC’s drive
mapping. However, the DRIVE command, as
displayed in the SDC-DOS updating section,
also instructs the Atmega micro-controller to
map the disk images stored on the SD card to a
virtual drive.
The proper context for the command is:
DRIVE n, “path name”
Where n is the drive number; path name is the
folder that holds your target disk image.
For example, issuing:
DRIVE 0, “APPS/TW64/TW64.DSK”
Would tell the Atmega to map DRIVE 0 to the
TW64.DSK image in the folder listed in the
path name.
Another example; let’s say you want to play
Pitstop II, on the PITSTOP.DSK image, located
in the Epyx folder under games. The command
you would issue is:
DRIVE 0, “GAMES/EPYX/PITSTOP.
DSK
Entering the DIR command would display a list
of the files on the disk image, just like it would
with real floppy hardware. You can LOAD &
RUN or LOADM & EXEC just as you would
with conventional hardware.
Multiple Disks
As discussed earlier, one of the features
CoCo SDC has over products that preceded
it to market is the ability to use software that
contains multiple disks, as well as software that
uses non-standard DSKCON routines.
In order to use games and applications that
utilize multiple disks, the CoCo SDC has a way
of knowing when this is necessary. The disk
images for multi-disk games and applications
need to be located in the same folder, and
the last character of the disk title must be a
number. An example from early will be used –
Sinistaar.
Entering the following command:
DIR “GAMES/SUNDOG/COCO3/SIN
STAR/
Returns the following:
Now, to mount the first disk image in the
folder, simply enter: