ImageDisk / PC FDCs & single-density - test-drb@ccmp.vtda.org

22 Mar 2006

...
  From: Dave Dunfield [mailto:dave06a at dunfield.com]
 Sent: Wednesday, March 22, 2006 2:54 PM 
...
   This may or
may not help, but I have used a 1542c with 
 imagedisk to create mixed density floppies. Others have 
 then used these to successfully create new images.

 Interesting - I have a 1542 which does not work with 
 ImageDisk or TeleDisk/TESTSD
 at single-density - the user reporting the problems also has 
 a 1542 which does not
 work with any of the three programs ... Mine is a '1542CF' - 
 I assumed the 'F' ment
 "with floppy" ... Is this the same as yours? 

Sorry, my confusion. I have used an Adaptec '1542B' (no F) bios copyright is
1988 (checksum BB00) with mcode copyright 1990 (checksum F3F7). I have read
and written mixed density images using the floppy portion of this
controller. This is a 16-bit ISA SCSI controller with a big 50 pin
centronics type connector on the bracket.

...

  I have at least 3 controllers that will work at
SD with   imagedisk. I have
  tried ID in single density with about 15
different floppy   controllers, and
  have one more to test. Is there a FAQ about what 
 controllers will write SD
  images? If not, I'd gladly maintain a list.

 I've found 6-7 that work OK - and I've been adding them to 
 the documentaion.
 Feedback on what other controllers do and don't work would be 
 appreciated,
 however as noted here - some controllers seem to work for 
 some people and
 not others (more likely, there are "minor" version variations 
 in the controller).

Here is what has worked for me:
Adaptec 1542B (as primary and secondary) BIOS: BB00 MCODE: F3F7

LCS-6625 REV:A2 copyright 1992 - This is a german made 4 floppy controller
that autmatically works under 6.22 to give you 4 floppy drives. Tthe second
two use the "standard" secondary floppy port and come up as E and F for me.
C & D are hard drives and G is the CD-ROM drive in this machine. Works the
same under Linux. I also have a scan of the manual that the maufacturer was
kind enough to send along (just last year).

ACER MIO-400KF - works as primary only. The jumper settings for this are
available in TheRef99.

...
  So far - every controller I've tried that passes
Chuck's 
 "testsd" program
 also works for me with ImageDisk at single-density - the case 
 I have been
 discussing is the only one I am aware of where this has not 
 been the case.
  I have one more to test. Are the above notes enough for you to go on? Do you
want me to try "testsd" on any of them?

Kelly