AMSTRAD

DISC DRIVE & INTERFACE

DDI-1

Congratulations on becoming the proud owner of the Amstrad DDI-1. You will soon discover the wisdom of your choice, and what a worthwhile investment your unit is.

Its speed will allow you to load and save files in seconds which would take several minutes using cassette. Furthermore, each disc allows you to store up to 180k Bytes of program on a single disc surface (360k on both sides). In other words, all your utilities on a disc, 10 or so games on a disc, all your standard letter files on a disc, the database from your indexing system on a disc - and so on.

Moreover, you can access files at random - which means that you don't have to pass laboriously through unwanted program files to get to the one that you want to use.

Disc operation comes into its own when you want to write any sort of program. When developing any software, it's very reassuring to take a copy every now and again in case you happen to attempt to run it, and then discover that you've left an 'ON BREAK GOSUB' lurking to prevent you from ever escaping back to direct mode; and if you can do this in 5 seconds rather than 5 minutes, you will obviously get a lot more done!

When developing assembler programs, the convenience of being able to assemble from disc and then test within seconds rather than minutes will be a boon to both the seasoned programmer, and the novice feeling his way through machine code for the first time.

The inclusion of CP/M opens a vast wealth of programming experience to the user. The 80 column mode ensures that programs will require minimal modification to run on the CPC464 - and the number of books written on the subject of CP/M and its use runs well into three figures.

In short, you have made exactly the right decision to upgrade to disc based operation. It will help and speed up your understanding and appreciation of computing in a way that is simply not comparable with cassette-only systems.

Furthermore, the 3 inch compact floppy disc format, in its tough plastic casing (with a protective shutter covering the head area) prevents accidental damage and provides a positive and rigid location in the drive mechanism.

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Amstrad manual Amstrad Disc Drive & Interface DDI-1