Free Key Operation - IBM 5251 11 Maintenance Information Manual

205
FREE KEY OPERATION
A free key operation can be entered after the power-on
diagnostic and before the customer sign-on. In free key
operation, the display station communicates with the
controller and permits key character displays; this
checks alphameric keys and most function keys. The
following function keys, if pressed in free key mode, will
return an error code 0099:
Print
Help
Rollt (Up)
RolI+ (Down)
Enter / Record Advance
Test Request
Attention
Command function
keys 1 through 24
Use online tests (206) to check these key operations.
Cursor in
position E
204·205
System Available
indicator is on
~
Line Sync
o
Line Check
o
Internal Check
o
Storage Check
• Ready
Controller and display
station polling complete
Maintenance Procedures 5251 MIM 1-67