Lowercase Characters
When Viewmaster 80 is activated with a PR#3 from BASIC, it
automatically enters uppercase mode. To toggle this shift lock feature
between uppercase and lowercase, use Control-A (Press the A key
while holding the CTRL key down). For this feature to work within a
commercial application program, the program must support this
lowercase display feature. Some application programs (e.g.
AppleWriter ][) use a different method to support upper and
lowercase character display.
Optional Shift Key Hardware Modification
This is an easy to install, one-wire modification for the Apple ][ Plus
which will enable you to use the lowercase feature of Viewmaster 80
and use the Shift key as a real shift key. If you are running an
Applesoft BASIC program or AppleWorks, this relieves you of
toggling Control-A every time you wish to change case (Control-A
will still function as a shift-lock).
No cutting or soldering is required. The only part needed is readily
available at your local Radio Shack
®
store. It is called a "Mini Clip
Lead" and the part number is 278-016.
This modification requires a newer style keyboard used on
revision 7
or later
Apple ][ Plus computers. Contact your authorized Apple
dealer for an upgrade to the latest revision main logic board &
keyboard.
Here’s how to apply the shift key modification to an Apple ][ Plus:
1.
Turn the computer OFF and remove the cover.
2.
Attach one of the lead's spring loaded clips to pin 1 of the
74LS251 integrated circuit "chip, " which is just forward of the
Game I/O connector (toward the keyboard). See drawing
following.
3.
Connect the other end of the mini clip wire to pin 24 of the
keyboard encoder connector. This connector is a row of 25
parallel wires extending between the keyboard and the keyboard
encoder circuit card suspended below it. Pin 1 of this connector
is nearest the power supply; pin 25 is nearest the right side of the
computer (...pin 24 is second from the right).
4.
Replace the cover; installation is complete.
8
ViewMaster 80