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OS_ReadSysInfo 6 Items
Programmer's Reference Manuals
» Part 15 – SWI Calls
» OS
» OS_ReadSysInfo
» OS_ReadSysInfo 6
» Items
Items
| Item | OS version | Value |
|---|---|---|
| 0 | 3.80+ | CamEntriesPtr |
| 1 | 3.80+ | MaxCamEntry |
| 2 | 3.80+ | PageFlags_Unavailable |
| 3 | 3.80+ | PhysRamTable |
| 4 | 3.80+ | ARMA_Cleaner_flipflop1 |
| 5 | 3.80+ | TickNodeChain |
| 6 | 3.80+ | ROMModuleChain |
| 7 | 3.80+ | DAList |
| 8 | 3.80+ | AppSpaceDANode |
| 9 | 3.80+ | Module_List |
| 10 | 3.80+ | ModuleSHT_Entries |
| 11 | 3.80+ | ModuleSWI_HashTab |
| 12 | 3.80+ | IOSystemType |
| 13 | 3.80+ | Level 1 page table pointer (L1PT) |
| 14 | 3.80+ | Level 2 page table pointer (L2PT) |
| 15 | 3.80+ | Address of top of UND stack |
| 16 | 3.80+ | Address of top of SVC stack |
| 17 | 3.80+ | SysHeapStart |
| 18 | ROL2 | Address of kernel MessageTrans block |
| 5.00+ | Address of SWI dispatch table | |
| 19 | ROL2 | Address of error semaphore |
| 5.00+ | Base of IRQ device head nodes | |
| 20 | ROL2 | Address of OS_PrettyPrint dictionaty |
| 5.00+ | End of IRQ device head nodes | |
| 21 | ROL2 | Address of timer 0 latch value |
| 5.00+ | Address of top of IRQ stack | |
| 22 | ROL2 | FastTickerV counts per second |
| 5.00+ | SoundWorkSpace | |
| 23 | ROL2 | Address of vector claimants table |
| 5.00+ | IRQsema | |
| 24 | ROL2 | Number of vectors supported |
| 25 | ROL2 | Address of top of IRQ stack |
| 26 | ROL2 | Address of SWI dispatch table |
| 27 | ROL2 | Address of branch back to OS after SWIs |
| 28-63 | - | Reserved for RISCOS Ltd. |
| 64 | 5.17+ | Address of SWI dispatch table |
| 65 | 5.17+ | Base of IRQ device head nodes |
| 66 | 5.17+ | End of IRQ device head nodes |
| 67 | 5.17+ | Address of top of IRQ stack |
| 68 | 5.17+ | SoundWorkSpace |
| 69 | 5.17+ | IRQsema |
| 70 | 5.17+ | DomainId |
| 71 | 5.17+ | Address of OS byte variables |
| 72 | 5.17+ | Foreground ECF OraEor block |
| 73 | 5.17+ | Background ECF OraEor block |
| 74 | 5.17+ | Base of debugger space |
| 75 | 5.17+ | Size of debugger space |
| 76 | 5.17+ | CannotReset |
| 77 | 5.17+ | MetroGnome (OS_ReadMonotonicTime counter) |
| 78 | 5.17+ | CLibCounter |
| 79 | 5.17+ | RISCOSLibWord |
| 80 | 5.17+ | CLibWord |
| 81 | 5.17+ | FPEAnchor |
| 82 | 5.17+ | ESC_Status |
| 83-127 | - | Reserved for ROOL |
1 Unused in RISC OS 5; returns zero.
2 Refers to OS versions released by RISCOS Ltd, i.e. RISC OS 4 & RISC OS 6.
Notes
This call was introduced in RISC OS 3.80, which supported items 0-17. Later versions of RISC OS introduced additional items. However lack of communication between different development teams has lead to values 18-23 being used for different purposes in different OS versions.
Starting with RISC OS 5.17, items 18-23 have been duplicated into items 64-69. This allows new software aimed at 5.17+ to read the values without risk of accidentally reading the wrong values when used on versions of ROL’s OS.