Texas Instruments 3000 - Manual (Page 133)

Diagnostics
Monochrome Adapter Test
Attribute test
Character test
Text test
Memory test
Color Graphics Adapter Test
Attribute test
Character test
Text test
Page test
Graphics test
Background test
Memory test
EGA Adapter Test
Attribute test
Character test
Text test
Page test
Graphics test
Background test
Memory test
VGA Adapter Test
Attribute test
Character test
Text test
Page test
Graphics test
Background test
Memory test
Parallel Port Test
Internal loopback
Printed pattern (requires connected printer)
External loopback (requires loopback. connector)
Diagnostics D-5