Xerox 721P88200 manual 2. Towers and command sets, Data towers, IM Image function set IM/1

DOCUPRINT IPS SYSTEM

These command sets have corresponding towers. Figure 3-2 shows the data and resource towers and their associated command sets.

Figure 3-2.Towers and command sets

During initialization, the IPDS command sets are communicated to PSF by the Acknowledge Reply to the ‘Obtain Printer Characteristics’ command. The IPS responds to PSF with the data tower and resource tower command sets. These command sets are part of the Device Control function set (DC1), which is composed of commands and an acknowledge protocol. The commands set up the logical page environment and communicate device controls. The acknowledge protocol transmits printer characteristics, status, resource information, and error information to PSF.

Data towers

The following sections define the command sets for the data towers.

Text function set – PTOCA (PT1, PT2, and PT3)

The text command set is composed of the IPDS command for presenting text information in a page, a page segment, or an overlay. The lowest level of this support is known as PT1. The next level, PT2, allows the use of Overstrike, Underscore, and Temporary Baseline Move (for superscript and subscript). Then comes PT3 which includes an additional extended text color selection method.

IM Image function set (IM/1)

The IM-image command set contains the commands for presenting image raster data on a logical page, a page segment, or an overlay.

DOCUPRINT IPS SOLUTIONS GUIDE 3-5