Entry | |
---|---|
R1 | 67 (&43) |
R2 | 5 |
R3 | Alphabet number |
R4 | ASCII of first character |
R5 | ASCII of last character |
Exit | |
---|---|
R1 | 0 to claim service, else preserved |
R2 | Preserved |
R3 | Preserved |
R4 | Preserved |
R5 | Preserved |
This service defines a range of characters for a given alphabet number.
If a module provides additional countries it should check this service – if the number matches one provided by the module it should claim this service, and call VDU 23 to define any characters in the range (R4-R5) inclusive defined in this alphabet.