A fast and easily customised operating system
for ARM devices
OS_Byte 9
Programmer's Reference Manuals
» Part 15 – SWI Calls
» OS
» OS_Byte
» OS_Byte 9
OS_Byte 9
(SWI &06)
| Entry | |
|---|---|
| R0 | 9 |
| R1 | New duration (in video frames, or 0 for ‘forever’) |
| Exit | |
|---|---|
| R0 | Preserved |
| R1 | Previous duration |
| R2 | Corrupted |
Use
The purpose of this call is to set the duration of the first flash colour in frames-per-second.
Notes
A duration of 0 means display the first colour constantly. The current duration may be read with OS_Byte 195, and may also be set with VDU 23,9?.
The second flash colour duration can be set using OS_Byte 10.
See also
- OS_Byte
- OS_Byte 10
- OS_Byte 195
- VDU 23,9?