> Request For Comment

Personally, I'd probably block the CS (Chip select) line, rather than
WE.  This would prevent *ALL* communication with the device (reads and
writes), and would probably be more gracefully handled by various
drivers, BIOS, and other low-level stuff talking directly to the IDE
device.  Either should make the device unwritable.

As to the delay caused by inserting logic into one of the lines, you are
correct to be concerned.  I would probably use a pass-transistor sort of
connection.  These are basically digital switches, and have very little
propogation delay when on (typically measured in pico-seconds), vs
actual logic gates, which have delays in the nanosecond realm.

Single-gate switches are available from a variety of sources, in small
SMT packaging...I'd try TI and National Semi fisrt.  Maybe something
like TI's 74HCT1G66GW...

Charles Steinkuehler
http://lrp.steinkuehler.net
http://c0wz.steinkuehler.net (lrp.c0wz.com mirror)



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