OS_GetEnv (changes)
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OS SWI Calls
» OS_GetEnv
OS_GetEnv
(SWI &10)
| Entry | |
|---|---|
| - | - |
| Exit | |
|---|---|
| R0 | Address of *command (read only) |
| R1 | RAM limit |
| R2 | Pointer to 5-byte time of program start |
Use
The purpose of this call is to read environment parameters.
Notes
The string pointed to by R0 is a copy of the command line used to start the program and can be passed to OS_ReadArgs to read the parameters.
The values in R0-R2 are only guaranteed to persist until the next program is run and so this call should be used at the start of a program and always before the first Wimp_Poll.
The values returned by this SWI in R0 and R2 can be set with OS_WriteEnv, the RAM limit is set with OS_ChangeEnvironment with a handle number of zero.
See also
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