
 README.DOC
 
NOTE: Remember to delete or rename the existing 3DS3\3DADI.CFG file before 
configuring 3D Studio.
 
                        * * * * * * * * * * * * 
 
This driver fixes a problem reported with PAL output.  One of the bits in the 
status byte is stuck high regardless what mode the deck is. This caused the 
driver to wait forever for that bit to clear (pre-roll bit).  This revision 
ignores the bit, but does wait for "in edit" to finish before sending the next 
frame. You will notice this wait when doing Disk to VTR as the turn around is 
faster than the deck can handle.
 
The speed difference between this revision and the old driver can be 
attributed to a new way of addressing the Frame Memory mode.  Prior to an 
edit, the deck switches to "DNR" mode so the frame is sent and stored in the 
deck's memory. That allows immediate return and 3D Studio can proceed with the 
next frame while the deck does the pre-roll and record. This might bring down 
the time it takes to lay a frame to tape from around 25 seconds to less than 
11 seconds. 
 
When in still mode (single step for example) the Frame Memory mode reverts to 
"BUFFER" where the frame is brought from tape and stored in the deck's 
memory, allowing a much more stable image. The image displayed is coming from 
memory not from tape. The head could even be stopped and it would not affect 
the image.
 
This Frame Memory mode can be set through the main driver configuration. Just 
delete 3DADI.CFG and run it again. It will be the very last question:
 
  Use digital frame memory (0=No):
 
If set to no, it will not change the Frame Memory mode. It will leave to 
whatever it may be after a reset.
 
This revision of the driver no longer acknowledges the STOP command sent from 
3D Studio prior to just about every command. It is ignored unless the tape is 
rolling. This was causing a double pre-roll making it take even longer to 
perform the edit.
 
