visible screen memory. This results in a considerable performance win
at all depths.
- Correct clear_screen() behavior when clearing to the top and bottom of
screen; start at current cursor position, not current cursor row.
- Add local prototypes, and other KNF.
device and a printable "external name" (name + unit number), thus eliminating
if_name and if_unit. Updated interface to (*if_watchdog)() and (*if_start)()
to take a struct ifnet *, rather than a unit number.
Also change the device probing scheme to use something a bit more rational.
A current side-effect is that nubus cards are double-mapped. I expect
to fix that shortly.
Also change splclock() to block everything but serial hardware interrupts.
a condition that occurs with some slow SCSI devices when they disconnect
(e.g. the AppleCD 600), generating spurious selection interrupts.
- Reorganize the debugging code slightly.
- Disable interrupt-driven PDMA when writing (use polled PDMA instead).
- Be more careful about when to flag a transfer as completed.
The result of these changes is that interrupt-driven PDMA works well
enough to bring the system up.
- split softc size and match/attach out from cfdriver into
a new struct cfattach.
- new "attach" directive for files.*. May specify the name of
the cfattach structure, so that devices may be easily attached
to parents with different autoconfiguration semantics.
- Setting the "monitor BSY" flag for polled PDMA is non-optimal. The
polled requests generate an interrupt that isn't serviced until the
command has been cleared from the queue.
the MI 5380 driver. It has been verified to work on the IIx, IIsi,
and IIci only, but should work with any Macintosh 5380-based SCSI
controller.
- This driver is _not_ intended to be a general purpose replacement
for the `ncrscsi' driver. It is an alternative for those having
problems with that driver.
- Disconnect/reselect doesn't (yet) work, so don't expect SCSI tape
or magneto-optical disk drives to function properly.
scottr