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1991-05-08
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Date: Sun, 28 Apr 91 17:55:14 MDT
From: grahamw@cpsc.ucalgary.ca (William Graham)
Subject: amiga virtual device
Anselm Hook asked me to submit his virtual device to comp.sys.amiga.
Here is a short poster file which he wrote; a longer doc file is included
in the uuencoded .lzh archive which I'll send in my next mail message.
-------------------------------------------------------------------------------
A VIRTUAL DEVICE DRIVER FOR THE AMIGA
or "THE POOR MANS FLOPTICAL"
ALPHA APRIL 15th 1991
By Anselm Hook
Its amazing that the Amiga is 5 yrs old and yet still has the best
operating system on the market. We all know that the Amiga supports a true
multitasking operating system. But the real proof of the pudding is the
fact that its extensible. The customer supported open architecture of the
Amiga Enviroment makes it possible for me to extend the functionality of
the entire system. The Virtual Device is in this sense, made possible by
the excellence and forethought that went into the design of the OS.
Matt Dillion wrote the original File System on which this one is
based.
The Virtual Device is simply another path on your system, like RAM:
(except its called VIR:)....you can copy files to and from it like a RAM disk,
and like a RAM disk all files are lost when you power off. But what you
can also do, which you cannot do with a RAM disk is not copy a file, but just
aquire a virtual reference to that files real location. This way the VIR:
device can appear to have hundreds of megabytes of files online, but in fact
it actually goes out and retrieves them from where they are really stored
(sometimes prompting you to insert a disk). So it acts as a *transparent*
disk manager as well. You can access VIR: from anywhere, from SID, from DPAINT,
from anyplace you can access any other device (like RAM:, DF0: etc...).
This is only an Alpha Version, there is no load save facility (although
I have a version here which is struggling to do that). I will be upgrading.
What I want at this point is to get feedback, inspiration, suggestions,
and any assistance that you may be willing to provide.
I can be reached on the AMUC VBBS in Calgary.
Yours Truly
Anselm Hook
C/O The Computer Shop
3515 18th St Sw
Calgary Alberta Canada
T2T 4T9
FAX: 243 2684
-------------------------------------------------------------------------------
- William Graham - grahamw@cpsc.ucalgary.ca - VE6UUG -