Subject: Floppy driver
To: None <amiga-dev@sun-lamp.cs.berkeley.edu>
From: None <rhealey@aggregate.com>
List: amiga-dev
Date: 04/04/1994 16:46:28
Has there been any progress on getting a mostly working floppy
driver in to the main source tree? At least something would be
better than what we have now.
Additionally, anybody have the programming info on the RAMDAC
used in the A2410 card? I have the 340x0 programming and reference
guides thanks to TI generousity, and 50 minutes on the phone
trying to convince them that I wasn't interested in their newest
wiz-bang graphics controller that replaces the 340x0 line... It looks
like a text display wouldn't be too bad but you'd have to write a
full blown GM for graphics mode and that would add ~64k to the
kernel; OUCH! More likely is you'd run an ioctl and squirt the
code down to the board only when you needed it thus saving
kernel memory for more important things. Can the RAMDAC support the
16 bit deep bitblane capability of the 340x0? It would be cool to
have a 64K color X server! Apparently the 340x0 can handle 1,2,4,8 and
16 bits deep in the same number of read/write cycles so 64K mode might
even be spunky!
While I'm rambling, I was able to mount the NetBSD partitions under
AmigaUNIX read only. Any idea if I will nuke the BSD file system if
I mount them read/write and let AMIX scribble on them? Device nodes
look bizarre due to the weird bit allocation for major/minor on
SVR4 but everything else seems to be OK.
Also, for those that might still be running AmigaUNIX. You can
bump the number of supported partitions from 8 to 16 by editing
/usr/sys/amiga/alien/sd.h and changing the sdpart macro mask from
07 to 0xf. For prettyness sake you may want to edit the scsi printf's
in sdpart.c and dd.c to change the partition field from %d to %x to
keep the values 0-f in device names. I have 14 partitions on my
disk to cover AmigaUNIX, ADOS and NetBSD. As far as device nodes go
you can change in to /dev/{r}dsk/c?d1s? and rename them to c?d0s{8-f}.
I think they originally intended to use the high bit for multiple
drives on the same target but never got around to actually doing it.
Finally, anybody working on a workable audio device? A mute Amiga is
a sad Amiga... It needs to sing every once in a while! B^).
-Rob
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