Q-bus to CF [was: IOmega]
Gordon JC Pearce
gordonjcp at gjcp.net
Thu Feb 28 02:41:13 CST 2008
On Thu, 2008-02-28 at 00:19 -0500, tiggerlasv at aim.com wrote:
> I stopped holding my breath for creation of a Q-Bus IDE
> controller a long time ago. While I like to think that I
> do a reasonable job troubleshooting some problems,
> I'm definitely not a hardware/software engineer.
> It would have been nice, but it makes more sense
> these days to go Q-Bus to SATA. I would imagine
> that it would be alot less hassle, and certainly alot less
> real estate on the board, with the smaller connectors,
> and fewer traces.
Actually SATA is extremely exacting and needs unbelievably complicated
PATA, on the other hand, is just a fast parallel port. You can hook a
CF card up to anything, even a microcontroller, with just a tiny amount
of glue logic.
> At any rate, back to the topic, Q-Bus to Compact Flash.
> If you can do Q-bus to Compact Flash, then you can do
> Q-bus to IDE, because CF *is* an IDE interface.
> Those wonderful CF to IDE adapter boards generally don't
> have any circuitry on-board, except to drive status LED's.
Exactly. Simply grafting a PATA interface onto a QBus card is trivial.
Actually getting something that will either pretend to be an existing
controller or writing a device driver for the operating system in use is
much much harder.
If you really wanted to push this forwards, write me some MSCP
controller firmware for an Atmel microcontroller...
> Right now, I have Compact flash / IDE on my Q-bus,
> albeit in a round-about way.
> I have older CMD SCSI controllers (CQD-200's).
> Attached to those are ACard 7720U SCSI <> IDE adapters.
These seem to crop up on the various sampler mailing lists I'm on, as a
way of using CF with older samplers which often have "funny" SCSI
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