IBM PCjr Manual page 171

FIRST IBM PC/V TEST MENU SCREEN
Test Tag
Name
1 Diskette Drive Test
4
TV and 40 Column Display Test
8
80 Column Display Test
5
Light Pen Test
6
Attachable Joystick Test
9
Sound Test
J
Keyboard Test
K
Reserved for future use
G
Modem Test
SECOND IBM PCjr TEST MENU SCREEN
Test Tag Name
A Graphics Printer Test
Running the IBM PCjr Tests 6-29