OS_Hardware 5 (changes)
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Hardware Abstraction Layer
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» OS_Hardware 5
OS_Hardware 5
(SWI &7A)
| Entry | |
|---|---|
| R0 | Bits 0-15 = type to match |
| Bits 16-31 = maximum major version number to match | |
| R1 | 0 to start an enumeration, else preserved from last call |
| R8 | 5 |
| Exit | |
|---|---|
| R1 | -1 if there are no (more) devices of this type |
| R2 | Pointer to device descriptor (undefined if R1 = -1) |
| - | Other registers preserved |
Use
Enumerates the device list, searching for devices of a particular type.
Notes
Devices will be returned in the same order as the order they were registered. Use OS_Hardware 4 if you want the devices to be returned in the opposite order.
This call first became available in RISC OS 5.19.
See also
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