IBM 6400 Programmer's Reference Manual page 108

Graphics Command Set
The Default byte has a value of either 0F or 8F. A value of 0F sets all indicated
items to their standard default values. A value of 8F and a mask bit equal to one
requires the appropriate data for a new default to be defined in the data field for
the corresponding attribute. Unreferenced data bytes not addressed by the
mask field are ignored.
The Data bytes contain immediate data that specifies values for the attributes in
this instruction. If the Default byte is 0F, these Data bytes are not present.
The Set byte specifies one of the following attributes or parameters:
Table 77. GDD Initial Graphics Defaults Self-Describing Instructions
Byte Value
0 X ' 21 '
1 X 04
' '
2
X 00
' '
X 01
' '
X ' 02 '
X ' 03 '
X 04
' '
X 0B
' '
3-4
5
X 0F
' '
X 8F
' '
6-End
Note: See "Drawing Orders" on page 97 for valid drawing order defaults.
92
6400 IPDS
Description
Set Current Defaults
-X FF Length of Data
' '
Set Byte
Drawing Attributes
Line Attributes
Character Attributes
Marker Attributes
Pattern Attributes
Arc Parameters
Mask Bytes See "Graphics Drawing Order Defaults
and Masks" on page 93 for explanation
Default Byte
Use Standard Values
Use the following Data Bytes
Data bytes
Error Code
X ' 0300..21 '
X 0300..03
' '
X 0300..02
' '
X ' 0300..03 '
X ' 0300..02 '
X 0300..03
' '
X ' 0300..21 '