Floppy Disk Configuration - Adaptec AHA-1740A Installation Manual

adaptec
AHA-1740A/1742A/1744
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for a toggling among options available. There is no facility for
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Floppy Disk Configuration
The AHA-1742A is normally shipped with its floppy disk con-
troller enabled. This may be disabled to prevent conflict with
an existing floppy disk controller already in the system by
re-
moving the rightmost jumper from J6 on the lower left of the
board. If the jumper is removed, the board will return the
iden~
tity of an AHA-17 40A to any software inquiry command. This
allows software to use the appropriate configuration file for the
main part of the board, as described previously.
The floppy disk can reside at one of two address blocks. Nor-
mally, it uses addresses 3FOh - 3F6h as the primary address. A
secondary address of 370h - 376h can be selected by placing a
jumper on block J6 in the second position from the right, next
to the floppy enable jumper described above.
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