help me with my device driver

[MKL at sri-nic.arpa]

A friend of mine asked me to forward this answer to Unix-Wizards...

Date: 10 May 1986 23:01:69-CDT
From: Suzie%SWAPPED at FULL.DEC
Subject: Re: help me with my device driver

> From: dragonpup <dwaagon%sdcc6.uucp at BRL.ARPA>
> Subject: help me with my device driver
> Date: 6 May 86 05:48:16 GMT
> Keywords: please, please, please
> To:       unix-wizards at brl-sem.arpa

> i have this problem see,
> i'm futility trying to write this driver for
> /dev/clit for our System V machine (i realize that this comes
> with a BSD version)
> every time i try to load it up, the buffers seem to overflow
> and alot of our circuits seem to be erroding from this.
> is this a problem with "bucket" size ?
> i hope someone out there can straigthen this out.

Writing your own driver for this device is not an easy task.  I have
used many inadequate versions, and the VMS code is probably the
hairiest around.  I suggest you find the /dev/vibrator tool as this
can be a useful aid when noone is around to help and is much better
for testing purposes than /dev/nul.  Also you should avoid any pubic
domain versions of the driver, as these may contain the Acquired
Incorrect Device Syndrome which will destroy any unprotected system.
To avoid the buffer overflow problem I suggest you skip using buffers
and access the device as quickly as possible.

Let me know if you'd like some help testing the code.
Suzie.

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