.SHOW DEVICE
 Device    Status          CSR     Vector(s)
 ------    ------          ---     ---------
  DU      Resident       172150   154
  DZ      Not installed  174200   310
  DW      Not installed  174000   300 304
  NL      Installed      000000   000
  PI     -Not installed  000000   000
  DD      Installed      176500   300 304
  DL      Installed      174400   160
  DM      Not installed  177440   210
  DX      Not installed  177170   264
  DY      Installed      177170   264
  LD      Installed      000000   000
  LP      Not installed  177514   200
  LS      Installed      173400   220 224
  MM      Not installed  172440   224
  MS      Not installed  172522   224 300
  MT      Not installed  172520   224
  RK      Not installed  177400   220
  SL      Installed      000000   000
  VM      Not installed  177572   000
  XL      Installed      176500   300 304
  SP      Installed      000000   110
  XC      Not installed  173300   210 214
 .DIR DL0:
 ?DIR-F-Error reading directory 
DL installed - it seems that the controller side of the M8061 is OK.
I had the "?DIR-F-Error reading directory" also (some time ago).
It was solved by using another external connection cable!
- Henk