6530 Programmer's Guide

Block Mode Operation
6530 Programmer’s Guide 3-39
Define Data Type Table (Esc r)
The Esc r sequence allows you to redefine the contents of the data type
table. (See Table 3-1 on page 3-5 or Appendix D for the predefined
values.) The table entries cannot be addressed individually; you must
redefine the entire table to change any of the predefined values.
The data type table consists of 96 entries, one entry for each ASCII
character in the graphics range (20H-7FH). The entries consist of 8 bits
that represent the data types (0-7). A value of 1 in a bit position defines
the character as valid for that data type. For example, the first entry in the
table is for the space character (20H). A 1 in bit 0 of that entry defines the
space character as valid for data type 0.
To specify the 8-bit entries, your application must send pairs of ASCII
encoded hexadecimal digits whose binary values represent the 8-bit
patterns. For example, the following bit pattern:
1110 0001
is represented by the hexadecimal digits E1.
The Esc r is followed by 96 pairs of these hexadecimal digits that define
the entire table. The following shows part of the predefined table as an
example:
After a mode switch, the 6530 reinitializes the predefined data type table.
ASCII
Character
Bit/Data Type
Hexadecimal
Digits 76543210
Space 1 1100001 El
! 00000001 01
“ 00000001 01
# 0000000 1 01
$ 00 11000 131
% 111 0 0 00 1 01