Showing changes from revision #5 to #6:
Added | Removed | Changed
Entry | |
---|---|
R0 | EOR mask |
R1 | AND mask |
Exit | |
---|---|
R0 | Old speed value |
R1 | New speed value |
The purpose of this call is to set the processor speed.
The new speed is set as:
New value = (old speed AND
R2) R1) EOR R1 R0
Currently supported speed settings are:
0 | Fast |
1 | Slow |
Some hardware allows programs to exert more control over the CPU speed by SWI Portable_Speed2 to specify what clock rates the ‘slow’ and ‘fast’ speed settings equate to.