IBM 31x Installation And Service Manual page 35

11-9-2005
Table A-1. User character definition: Logic Controls Emulation
Mode
Byte # 0 1 2
1 P8 P7 P6
2 P16 P15 P14
3 P24 P23 P22
4 P32 P31 P30
5 - - -
* These character definitions are maintained for application compatibility
with displays with 5x8 character boxes.
←– –– –5 pixels wide – – – –→
P1 P2 P3 P4
P6 P7 P8 P9
P11 P12 P13 P14
P16 P17 P18 P19
P21 P22 P23 P24
P26 P27 P28 P29
P31 P32 P33 P34
IBM Mode
IBM Mode allows nine user defined characters to be defined. See
Table A-2 for defined characters:
Table A-2. User character definition: IBM Mode
1. X'15'
2. X'16'
3. X'17'
4. X'18'
5. X'19'
The byte that follows the command byte represents an address
betweenX'15' and X'1A', or between X'1C' and X'1E' in the currently
selected character set. This byte is followed by eight bytes, which
define the actual bit patterns of the user-defined character.
Table A-3 on page A-4 shows the format of these eight bytes.
Note: A hyphen character in the table indicates a do-not-care bit.
The other values relate to the character pixel positions
shown in the diagram following the table. A value of 1 in the
appropriate place in the data stream indicates that the
related pixel position is ON; a 0 indicates that it is OFF.
Input/output device commands
Bit
3 4 5 6
P5 P4 P3 P2
P13 P12 P11 P10
P21 P20 P19 P18
P29 P28 P27 P26
- - P35 P34
P5
↑
P10 |
P15 |
P20 7 pixels high
P25 |
P30 |
P35 ↓
6. X'1A'
7. X'1C'
8. X'1D'
9. X'1E'
Appendix A. Input/output device commands
7
P1
P9
P17
P25
P33
A-3