OS_Byte 193 (changes)
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Programmer's OS Reference SWI Manuals Calls
» Part OS_Byte 15 – SWI Calls
» OS_Byte 193OS
» OS_Byte
» OS_Byte 193
OS_Byte 193
(SWI &06)
| Entry | |
|---|---|
| R0 | 193 (&C1) |
| R1 | EOR value |
| R2 | AND value |
| Exit | |
|---|---|
| R0 | Preserved |
| R1 | Value before being overwritten |
| R2 | Corrupted |
Use
The purpose of this call is to read or write the flash counter.
Notes
This call reads or sets the count-down timer for flashing colours. Provided that the flash period is not infinite, the counter is loaded with the duration of the first flash colour and counts down by one every VSync until it reaches zero. At this point the colours are swapped and the counter loaded with the second flash period. etc.
See also
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