Extended Floppy Image Building Supplement

                For Users of RFDISK, RFORMAT and CDTOOLS.



Users with RFDISK, RFORMAT and CDTOOLS can prepare Extended Floppy Emulation
Boot Images in an expedited manner, using the tools in combination.

Since there is no penalty for using Boot Mode 3 for any size Image, the
Instructions are written for Mode 3. You would need to change the Sectors
per Track to 15 for Mode 1 or 18 for Mode 2, instead of 36, and recompute the
Number of Cylinders required for the desired Image size.



Step 1 is to determine the size of the Image you want to create. If you have
plenty of room on the Disk you are creating, you can use the maximum size
as given in the examples. In this case you can skip the rest of Step 1.
Otherwise you will need to estimate the amount of space you will need. A
conservative estimate of size would be as follows.

Total Size of Data
plus
Number of Files and Directories multiplied by 1KB.
plus 1% of the above amounts
plus 20KB

Divide the number of Bytes by 512 to get the number of Sectors (73728 Max).
Divide the number of Sectors by 2 then by 36 (or 15 or 18 see above) to get
the number of Cylinders (1024 Max).



Step 2 is to create a Partition to hold the Image during assembly.

If you have a blank Hard Drive or a Hard Drive that can be completely erased,
go to Step 2A.

If you have a blank USB Drive or a USB Drive that can be completely erased,
go to Step 2B.

If you must use an existing Hard Drive, there must be enough space for a new
Partition big enough or a Partition that can be reformatted. Go to Step 2C.


Step 2A

1. Run RFDISK.
2. Select the Hard Drive to be used.
3. M  (Create MBR)
4. K  (Remove all existing Partitions (if needed))
5. G 2 36  (set Geometry (adjust if using Mode 1 or 2)).
6. A E 1 1024  (substitute # of Cylinders plus 1 if not maximum size)
7. E 1  (Erase Partition Data)
8. W  (Write to Disk)
9. Q  (Quit)


Step 2B

You can create an Image using USB with MBR by following the Steps in 2A except that you
select the USB Drive in step 2.


Step 2C

If you adding a Partition, follow the instructions for RFDISK to add a 5
Cylinder Type E Partition (40MB for typical Geometry). Otherwise choose a
Partition that can be erased that is at least 5 Cylinders (40MB).

Change the Partition Type to E if not already set.

Use the Erase "E" Command to clear the Partition before Writing to the Disk.

If you added a Partition, reboot the Computer.

Go to Step 3A instead of Step 3.



Step 3 is to Format the Partition (after Steps 2A or 2B ONLY).

1. Run RFORMAT as follows:

   RFORMAT DriveNumber P1 16 M 0xF0

   DriveNumber is the INT 13 Number, 0x80 = First Hard Drive

2. Reboot Computer if using a Hard Disk. Unplug and replug if using a USB
   Drive.


Step 3A is to Format the Partition after Step 2C ONLY.

1. Run RFORMAT as follows:

   RFORMAT DriveLetter 16 S 73728 G 2 36 512 M 0xF0

   DriveLetter is the Letter the Drive is mounted to (C: to Z:).

   Replace 73728 with actual number of Sectors if not using the Maximum Size.
   If number of Sectors is less than 5000 replace 16 with 12.
   Replace 36 with 15 or 18 if using Modes 1 or 2 respectively.

2. Reboot Computer.



Step 4 is to Assemble the Partition.

Build Image by Creating Directories and adding Files to new Partition.



Step 5 is to Rip the Partition to create the Boot Image File.

Rip the Image using a Disk Ripper. The included GETDISK can do this as
follows:

GETDISK DriveLetter 0 73728 ImageFile (Replace 73728 with the actual
number of Sectors if not using the Maximum. Do not put the Image File
on the new Partition.



If you are creating more than one Boot Image and do not need to increase the
size of the Partition, you can go to Step 3 or 3A (as appropriate) to create
the next one.


If you used Step 2C, you will have a non-standard Partition on your Hard
Drive. When you are finished using the Partition and no longer need it, you
can restore your Hard Drive as follows.

1. Run RFDISK.
2. Select the Drive
3. You should see a Partition that is marked "INV".
4. If you had created the Partition, you can simply remove it.
5. If you want to keep it, or restore a reformatted Partition, clear the
   Partition with the 'E' Command.
6. Write the Updates to the Drive.
7. Reboot the Computer.
8. If you kept the Partition, reformat it normally.



Step 6 is to create ISO Files or burn Disks using the Boot Image File.
See the CDTOOLS Manual for this procedure.

NOTE: The Image Files as created this way do not have the correct settings
for direct use. Use the Force Mode Optino "-F" even if the Images are the
same size as one of the three standard sized Floppies. BUILDCD or MAKECD
will reject the Boot Image if the Force Mode Option is not set.