Mountain Mach-2 Tape Controller

@7401.ADF - QIC80 Tape Drive Controller (used by various brands)

J1-3 Solder pads for 40 pin headers
P1 DB25 external port
U1 NCR 609-0381722 Mountain Mach 2
U2 N82077AA-1
Y1 4S2400A xtal

ADF Sections   AdapterID 7401h  "QIC80 Tape Drive Controller"

I/O Address Range
   I/O base address used by this adapter.  
     <"0200H-0210H">, 0600H-0610H, 0A00H-0A10H, 0E00H-0E10H, 1200H-1210H, 1600H-1610H, 1A00H-1A10H, 1E00H-1E10H

Interrupt Level
    Interrupt level used by this adapter. If possible select an interrupt level that is not being used.
     <Choice "Int_3" >, 4, 5, 6, 7, 10, 11, 12

DMA Arbitration Level
   An arbitration level of 0 has the highest priority, and increasing levels have corresponding decreased priority. Channels 0 to 14 will correspond to arbitration levels 0 to 14 respectively."
     <Choice "Level_0">, 1,  2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14

DMA Transfer Mode
   "This setting determines which type of DMA transfers will  occur between the host and this adapter. If Burstmode is  selected, data will be transfered in blocks. If Single_Transfer is selected, a full DMA handshake will occur for each byte transfered. 
   Burstmode DMA transfers may be incompatible with some types of computers. If it is suspected that this card is causing the system to crash intermittently, the problem may be solved by choosing Single_Transfer DMA Mode."
     <"Burstmode" >, Single_Transfer

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