Q-bus to CF [was: IOmega]

[woodelf]

der Mouse wrote:
>>> Some time back (years), someone was working on an IDE interface for
>>> a Qbus MicroVAX and I was doing the driver.  [...]
> 
>>> We never got it working, and it is not clear to me, now, why not.
>>> [...] what memory I have indicates that there were hardware issues,
> 
>> the likely reason is PDP-11 and VAX does read before write and IDE
>> does not like that.
> 
> Huh?  The only sense I can think of in which the PDP-1 and VAX could be
> said to do read before write is in the bus transaction sense, and
> anything that could be called "IDE" was insulated from bus
> transactions.  While the card didn't have much smarts, it did have that
> much; it looked enough like a wdc that I did the driver as an "attach
> wdc at uba with wdc_uba" attachment layer, rather than a completely new
> driver.  I find I still have my copy of the dev directory, including a
> boot-time console log:

Well if my SBC6120 ( PDP 8 Clone) can have a IDE interface
why not some other PDP.  We are not looking for high speed
just hardware in this case.