Grid-line draw control is used to store the grid-line screen format in
the PC400. The format of the control data is as follows:
Figure 1. Grid-Line Control
Data Format
This control data is sent as normal display data from an application
program on the host system. The starting position for displaying this data
should be specified as follows:
Grid-line draw control code: first line, first column
Grid-line designation data: first line, fourth column
The last byte of the control code should be the attribute X'20' or X'27', which indicates the end of the field. This attribute character should
be sent from the host so that it can be overridden with the non-display attribute X'27', which is the first byte of the grid-line designation data. Items
1 and 2 should be defined as different fields. When it receives the grid-line
draw control code and the grid-line designation data, PC400 stores the grid-line
designation data in the specified grid-line information buffer.
However, the grid-line screen format is displayed when receiving character
data that contains the information to display the grid-line screen format.
