JANUS 2020 Hand-Held Computer User's Manual
Learning How to Change the Contents of Drive C
Drive C contains the reader's AUTOEXEC.BAT and CONFIG.SYS startup files,
as well as software for the PC card drive. You can use the remaining space on
drive C to store applications and data files. In general, drive C should contain
files that you often read or execute, but do not often write to or replace.
Drive C is a 512K ROM drive implemented in flash memory. It is upgradeable, but
has limited write capability. You can use DOS commands to read from drive C, but
you cannot use DOS commands to write to drive C.
To write to drive C, you must use one of these special utilities:
• Auto-Loader
• MkImage and PutImage
• Binary file transfer (BFT)
These utilities let you create an image
file that contains an "image" or
"snapshot" of all the files you want on
drive C.
Then you use the utilities to load the
image file to drive C.
Once you load the image file to drive
C, the image file becomes transparent.
For example, when you use the DOS
DIR command for a directory listing
on drive C, all you see are the
individual files that were contained in
the image file.
You cannot directly add, edit, or delete
individual files on drive C. Instead,
you must replace the entire image.
3-10
BC
N F
AUTOEXEC.BAT
AUTOINST.BAT
Image file
CONFIG.SYS
MTSRAM.EXE
Drive C
2020U.212