22 Jan
2007
22 Jan
'07
11:11 p.m.
[...]
What I'd really like I suppose is a user-space
driver for a widget that
provided SCSI and SASI support via a *totally* dumb HBA (i.e. polled I/O and
twiddling of bus lines "directly") - in other words, one step less intelligent
still than most "dumb" HBAs (which still use some sort of SCSI IC). It'd be
slow as molasses, but speed isn't the critical factor compared to flexibility
and ease of driving.
The lack of a decent 'user port' on PCs is a major pain for hardware
hackers like me :-). Peronally, I'd probably use something like an
HP9000/200 series machine (neat, repairable, and has an exceellent 16 bit
parallel I/O card availalbe), but that's hardly a universal solution.
Unfortunately a PC parallel port doesn't quite have enough I/O lines, I
Could yuo not add some latches/buffers to tha parallel port to get more
I/O lines, and use a couple of the 'handshake' outputs to select between
them?
-tony