@7401.ADF - QIC80 Tape Drive Controller (used by various brands)
QIC80 Tape Drive Controller
|J1-3 Solder pads for 40 pin headers
P1 DB25 external port
U1 NCR 609-0381722 Mountain Mach
Y1 4S2400A xtal
VR1 NS LM7805ACZ
ADF Sections AdapterID 7401h "QIC80 Tape Drive Controller"
I/O Address Range
I/O base address used by this adapter.
0600H-0610H, 0A00H-0A10H, 0E00H-0E10H, 1200H-1210H, 1600H-1610H, 1A00H-1A10H,
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."
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