is dependent on the number of RAM boards and amounts to a multiple of 32.
The interfacing is extremely simple and for
is available while for other applications flow diagrams are available.
After this description of the system I shall now mention a number of
advantages with regard to the systems mentioned before. The RAMDISK
such as many systems apply it. constitutes the system memory and is
then addressed in page mode or via banking. These are often costly
provisions which make a system for non-users of it unnecessarily
expensive. The software for this is also very complicated and
everything is system bound. Another possibility are instant I/O boards
for a particular bussystem with certain great quantities of memory
which are also systembound and often cost a great amount of money.
The advantage of the chipdisk is in this case the modular buildup so
that one can start with a small and relatively cheap system. In
comparison to the Winchester which couples great storage to high speed
the Chipdisk is as regards the price per bit disadvantageous but the
great vulnerability and the high purchase price of the Winchester drive
are the reverse side of the medal. The hard- and software interfacing
is much more complex too.
In the way of speed the Chipdisk is in all cases amply the winner and a
speed gain with a factor 30 is with respects to a floppy no exception.
I do not wish to conceal a disadvantage of the Chipdisk either. It is
clear that when the computer is switched off the data in the Chipdisk
get lost, so that the results of an operation as the last stage must
always be written to a real floppy.
The application of the Chipdisk
therefore lies mainly in the realm of sorting, assembling, compiling
and designing operating systems.
For further information about this new medium please you can apply to
the designers of the Chipdisk.
H. Vermeulen,H. Rietveld