I-Data 5250 ALLY - Manual (Page 193)

Page B-11 APPENDIX B — SCS/DCA COMMAND SUMMARY
Command: Set Line Density (SLD)
Format: 2B C6 nn ld
Printers: 3812, 4214, 5219, 5224, 5225
Action: Sets the height of one line of print to be the value of the
ld parameter divided by 72 inches.
For the 4214, if the value of the ld parameter is greater
than 48h, a default value of 0Ch (6 lines per inch) will be
used.
For the 5219, ld parameter values other than 12h (4 lines
per inch), 0Eh (5.33 lines per inch), 0Ch (6 lines per
inch), 09h (8 lines per inch), 08h (9 lines per inch) and
06h (12 lines per inch) will result in no operation; line
density remains unchanged.
For the 3812, 5224 and 5225, all values of the ld
parameter are allowed.
For the 3812, Computer Output Reduction (COR) mode
causes the ld parameter to be reduced automatically to
70% of its set value (the default value for Option 4E —
Percentage Vertical Reduction in COR). This reduces a
form height of 11 inches to 7.7 inches.
IBMEMUL: Same as the 3812.
Because many target printers are not capable of changing
line density (line density is a function of the font
selected), the 5250 ALLY does not send line feeds to
most printers. Instead, it performs vertical downward
movements (with PFS 0D — VERMOVE) to simulate
IBM line spacing and to provide full support for this
command.
If the Initial Condition Set specified by Set Initial
Conditions (SIC) is Data Processing (DP), the line
density set either by this command or by the Set Single
Line Distance (SSLD) command is used in page length
calculations when determining orientation automatically.
275EMUL: No effect, except that if the vv parameter is less than 0Ch
(6 lines per inch), subsequent lines are double spaced.