Unisys manual EFP9800 ESC/POS Commands Limitations

EFP9800 ESC/POS Commands

Limitations

Be aware of the following limitations in page mode:

•Bi-directional printing may cause problems and should be avoided.

Use Set/Cancel Uni-Directional Printing (1B 55) to set uni-directional printing.

•Half dots cannot be used.

Page mode requires full dots for 5 x 9 dot font characters (user defined) and bit images. Convert any half-dot values referenced in the following commands to full dot values:

Set Right-Side Character Spacing (1B 20)		Set Absolute Starting
Position (1B 24)
Set Relative Print Position (1B 5C)		Set Line Spacing (1B 33)
Set Horizontal Tab Positions (1B 44)	Print and Feed Paper (1B 4A)
Set Printing Area in Page Mode (1B 57)

•Because of the need to use full dot values only, the following commands are limited in how they are used in page mode:

−Select Print Modes (1B 21): Double-strike and all 7 x 7 selections are not valid. Double-high, double-wide, and underlined selections can be used.

−Select Bit Image Mode (1B 2A): Double-Density bit images cannot be used. Single-density can be used.

−Print Downloaded Bit Image (1D 2F): Double-Density bit images cannot be used. Single-density can be used.

•Set/Cancel Double-Strike Mode (1B 47) cannot be used to double-strike characters in page mode.

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