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- DDFPAT (MULTIPLE FORMAT SUPPORT FOR DDFORMAT) DOCUMENTATION
- by Julian Loke, 1986 July 06
- No distribution for profit without author's express permission.
-
-
- INTRODUCTION
-
- With the capability of using powerful utilities such as
- SETDRIVE, SETDISK, SDR, DRIVESET, etc., etc., on my MicroBee 56k,
- it seemed sad that it was not possible to format disks compatible
- with other machines, such as the ubiquitous and widely supported
- KAYPRO II. This situation does not exist for a some other
- machines in the market.
-
- The DDFORMAT.COM utility provided with my system produces
- disk formats with 10 sectors per track, 40 tracks per side, 2
- sides per disk. It is a relatively simple matter to patch it to
- produced formats compatible with machines using 10 sector per
- track formats. Fortunately the KAYPRO II (SSDD) and the AMPRO
- (DSDD) are systems fitting this description.
-
- So, to produce disks compatible with a Kaypro II system, I
- can now type:
- A>ddformat kaypro2
-
-
- USAGE AND NOTES
-
- The syntax for the patch appears below:
-
- DDFORMAT [ M | K | A ]
-
- 1) No parameters: A menu showing the options available is
- displayed. Pushing the appropriate key (M for
- Microbee, K for KayproII, and A for Ampro) will set up
- the program for the required system. Typing Ctrl-C
- aborts the program.
-
- 2) Parameter M, K, A: The patch program will select the
- correct data for the corresponding system, and DDFORMAT
- will run in a manner akin to the unpatched version.
-
- 3) Parameters other than M, K, A: The program behaves as if no
- parameter had been entered, and the menu is displayed.
-
-
- FURTHER NOTES AND DISCLAIMER
-
- Disk formats produced using this method ARE NOT THE SAME as
- those produced on the proper target machines. However, the
- formats are COMPATIBLE with the appropriate target machine, which
- can read and write data/text on the disk. Of course they are not
- "system" disks, and so cannot be used for booting. Despite this,
- there is no problem with using them as TRANSFER disks.
-
- There is only one new error message produced by the patch
- program. A "Bad Version" error results if your version of
- DDFORMAT.COM is not one of the two supported. If this is the
- case, then a new patch program will have to be written.
-
-
- INSTALLING THE PATCH
-
- The two versions of DDFORMAT.COM supported use the same
- installation sequence. Before you start, make sure that you are
- NOT altering your system disk. Work with backup copies. You'll
- need the following files:
-
- DDFORMAT.COM Your original copy, of course!
- DDFPAT.HEX The patch program itself
- DDT.COM A standard CP/M utility
-
- Use the following sequence of commands to produce the file
- NDDF.COM, which you will rename later. Note that the letters in
- lower case are to be typed by the user:
-
- A>ddt ddformat.com
- DDT VERS 2.2
- NEXT PC
- 0500 0100
- -iddfpat.hex
- -r
- NEXT PC
- 0688 0000
- -g0
-
- A>save 6 nddf.com
- A>_
-
- Now, test the formatting program using a blank disk (NOT
- the disk with your precious public domain software on it!), and
- the NDDF command. Once you are satisfied with the new program,
- rename it to DDFORMAT.COM using the following commands:
-
- A>era ddformat.com
- A>ren ddformat.com=nddf.com
- A>_
-
-
- ACKNOWLEDGEMENTS AND ENQUIRIES
-
- Thanks to Mirko Fluher for his help and advice in the
- development and testing of this software.
-
- If you have any enquiries, requests for source, etc, please
- feel free to get in touch with for me either via the magazine, or
- via the MBUG bulletin board (7*24h (03)-882-1571).
-
-
- END OF DOCUMENTATION