APPENDIX D
Hardware
Switches
The controller card has a block of four switches located in the
lower right hand corner.
What They Do
Switch 1, Interrupt Enable - This switch must be closed in
order for any interrupts generated by the Hard Drive to
pass through to the Apple. (Interrupts are not used at
this time.)
Switch 2, PS Enable - When pseudo-slotting in the Apple
IIGS, this switch must be closed. When pseudo-slotting
in a //e or ][+, this switch must be open.
Switch 3, ][+ Boot Enable - Leaving this switch open allows a
II+ or an unenhanced //e to boot directly from the hard
disk. If the hard disk is not to be the boot device in these
systems, this switch should be closed. In a IIGS or an
enhanced //e, this switch should also be closed.
Switch 4, Pseudo-Slot Enable - When this switch is closed,
the controller card will show up in slot 7, no matter
which slot it is in. With it open, the card uses the slot in
which it is placed.
How To Set Them
To change the switch settings, use a small, pointed object,
like a wooden toothpick or bent-out paperclip. The circle
on each switch represents the end that is pressed.
Push down on Push down on
number side to side marked “OPEN”
close (ON) to open (OFF)
Side View Side View
(from right end) (from right end)
Flipping the Switches
50 Vulcan
