TransAct Ithaca 8000, Руководство программиста

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Programming Codes Ithaca
®
8000 Programmer’s Guide
Page 74 Rev D 100-06908
Horizontal Motion Control
Several commands can be used to control the horizontal position of characters. Many
applications use space control to position fields. However, the Ithaca
®
8000 Printer has
the ability to control character position with horizontal tab stops. This is done using the
horizontal tab [HT] to move to those tab stops.
[HT] Horizontal tab
ASCII [HT]
Hexadecimal 09H
Decimal <9>
IPCL &%HT
EPOS [HT]
Description The [HT] command inserts spaces in the print buffer up to the next tab
stop. The default tab locations are every eight spaces.
[BS] Back space
ASCII [BS]
Hexadecimal 08H
Decimal <8>
IPCL &%BS
EPOS [BS]
Description The [BS] command moves the print buffer one character width to the left.
The pointer position cannot be moved to the left of the left margin. [BS]
does not cause the buffer to be printed; rather, the following data is OR'ed
with the previous data.
[ESC] D Set horizontal tab stops
ASCII [ESC] D <n
1
> <n
2
> <n
3
> ... <n
i
> 0
Hexadecimal 1BH 44H <n
1
> <n
2
> <n
3
> ... <n
i
> 00H
Decimal <27> <68> <n
1
> <n
2
> <n
3
> ... <n
i
> <0>
IPCL none
EPOS [ESC] D <n
1
> <n
2
> <n
3
> ... <n
i
> 0
Description The [ESC] D <n
1
> <n
2
> <n
3
> ... <n
i
> 0 command sets tab stops at the
character columns specified by <n>. The end of the settings is specified
by a <0>. All previously set tabs will be cleared. The restore-default
procedure other than to re-specify the tabs. Column sizes are in
accordance with the current character pitch. Setting tabs that are beyond
the station width is possible. A [CR] is inserted when the tab is used.
Printing begins at the home position. The power up default is every eight
spaces, i.e., 9, 17, 25, and so on.