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OS_ReadVduVariables
Programmer's Reference Manuals
» Part 15 – SWI Calls
» OS
» OS_ReadVduVariables
OS_ReadVduVariables
(SWI &31)
| Entry | |
|---|---|
| R0 | Pointer to input block |
| R1 | Pointer to output block (can be the same as R0) |
| Exit | |
|---|---|
| R0 | Preserved |
| R1 | Preserved |
Use
The purpose of this call is to read a series of VDU variables.
Notes
The input block is a list of VDU variable numbers (words) terminated by -1. Each variable is read, and its value is written as a word into the output block.
Note: You can also read the mode variables with this call.