Difference between revisions of "List of SITS system calls"
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− | [[SITS]] system calls | + | [[SITS]] system calls were done using EMT in older versions, and TRAP in newer. The system call number makes up the lower 7 bits. Bit 200 can be set to have the call fault on error, in which case a $ replaces the . in the symbolic name. |
+ | |||
+ | System call inputs are popped off the stack, and outputs are pushed. On error, the Z flag is set and arguments are left on the stack. In the table below, (C) indicates a capability. | ||
{| class="wikitable" | {| class="wikitable" | ||
− | |||
! Number | ! Number | ||
! Name | ! Name | ||
− | ! | + | ! Description |
− | ! | + | ! colspan="4" | Inputs |
− | ! | + | ! Outputs |
|- | |- | ||
| 0 | | 0 | ||
| .NOOP | | .NOOP | ||
− | | | + | | - |
− | | | + | | colspan="4" | - |
− | | | + | | - |
|- | |- | ||
| 1 | | 1 | ||
| .FORK | | .FORK | ||
| Create new process | | Create new process | ||
− | | Entry point | + | | colspan="4" | Entry point |
− | | | + | | - |
|- | |- | ||
| 2 | | 2 | ||
| .POOFF | | .POOFF | ||
− | | Kill | + | | Kill this process |
− | | | + | | colspan="4" | - |
− | | | + | | - |
|- | |- | ||
| 3 | | 3 | ||
| .SLEEP | | .SLEEP | ||
| Sleep | | Sleep | ||
− | | | + | | colspan="2" | Time (least significant) |
− | | | + | | colspan="2" | Time (most significant) |
+ | | - | ||
|- | |- | ||
| 4 | | 4 | ||
| .SINK | | .SINK | ||
− | | | + | | Disable floating point |
− | | | + | | colspan="4" | - |
− | | | + | | - |
|- | |- | ||
| 5 | | 5 | ||
| .FLOAT | | .FLOAT | ||
− | | | + | | Enable floating point |
− | | | + | | colspan="4" | - |
− | | | + | | - |
|- | |- | ||
| 6 | | 6 | ||
| .INVOK | | .INVOK | ||
− | | | + | | Invoke capability |
− | | | + | | Function,,capability (C) |
− | | | + | | argument |
+ | | colspan="2" | argument | ||
+ | | (Variable) | ||
|- | |- | ||
| 7 | | 7 | ||
| .QULK | | .QULK | ||
− | | | + | | Lock queue |
− | | | + | | colspan="4" | Queue (C) |
− | | | + | | - |
|- | |- | ||
| 10 | | 10 | ||
| .QUNLK | | .QUNLK | ||
− | | | + | | Unlock queue |
− | | | + | | colspan="4" | Queue (C) |
− | | | + | | - |
|- | |- | ||
| 11 | | 11 | ||
| .TTGIV | | .TTGIV | ||
− | | | + | | Give TTY away |
− | | | + | | colspan="2" | Master sphere (C) |
− | | | + | | colspan="2" | Teletype (C) |
+ | | - | ||
|- | |- | ||
| 12 | | 12 | ||
| .TTGET | | .TTGET | ||
− | | | + | | Get the TTY |
− | | | + | | colspan="4" | Teletype (C) |
− | | | + | | - |
|- | |- | ||
| 13 | | 13 | ||
| .WRDI | | .WRDI | ||
− | | | + | | Word input |
− | | | + | | colspan="4" | File (C) |
− | | | + | | Data |
|- | |- | ||
| 14 | | 14 | ||
| .WRDO | | .WRDO | ||
− | | | + | | Word output |
− | | | + | | colspan="4" | File (C) |
− | | | + | | - |
|- | |- | ||
| 15 | | 15 | ||
| .BYTI | | .BYTI | ||
− | | | + | | Byte input |
− | | | + | | colspan="4" | File (C) |
− | | | + | | Data |
|- | |- | ||
| 16 | | 16 | ||
| .BYTO | | .BYTO | ||
− | | | + | | Byte output |
− | | | + | | colspan="4" | File (C) |
− | | | + | | - |
|- | |- | ||
| 17 | | 17 | ||
| .BLKI | | .BLKI | ||
− | | | + | | Block input File (C) |
− | | | + | | File (C) |
− | | | + | | Length |
+ | | colspan="2" | Address | ||
+ | | - | ||
|- | |- | ||
| 20 | | 20 | ||
| .BLKO | | .BLKO | ||
− | | | + | | Block output |
− | | | + | | File (C) |
− | | | + | | Length |
+ | | colspan="2" | Address | ||
+ | | - | ||
|- | |- | ||
| 21 | | 21 | ||
| .MAP | | .MAP | ||
− | | | + | | Create page |
− | | | + | | Access,,sphere (C) |
− | | | + | | Destination page,,source type |
+ | | Source page | ||
+ | | Page length,,page offset | ||
+ | | - | ||
|- | |- | ||
| 22 | | 22 | ||
| .ALLOC | | .ALLOC | ||
− | | | + | | Allocate swap |
− | | | + | | Size |
− | | | + | | Start |
+ | | colspan="2" | Disk | ||
+ | | - | ||
|- | |- | ||
| 23 | | 23 | ||
| .CRUSR | | .CRUSR | ||
− | | | + | | Make this a user process |
− | | | + | | Copy name |
− | | | + | | Length of name |
+ | | colspan="2" | Pointer to name | ||
+ | | - | ||
|- | |- | ||
| 24 | | 24 | ||
| .RDMAP | | .RDMAP | ||
− | | | + | | Read map |
− | | | + | | colspan="2" | Sphere (C) |
− | | | + | | colspan="2" | Address |
+ | | - | ||
|- | |- | ||
| 25 | | 25 | ||
| .FONT | | .FONT | ||
− | | | + | | Read or write font |
− | | | + | | colspan="2" | Function,,font |
− | | | + | | colspan="2" | Address |
+ | | - | ||
|- | |- | ||
| 26 | | 26 | ||
| .SSTAT | | .SSTAT | ||
− | | | + | | Read system status |
− | | | + | | colspan="4" | Address |
− | | | + | | - |
|- | |- | ||
| 27 | | 27 | ||
| .VIDSW | | .VIDSW | ||
− | | | + | | Set video switch modes |
− | | | + | | colspan="2" | Source |
− | | | + | | colspan="2" | Destination |
+ | | - | ||
|- | |- | ||
| 30 | | 30 | ||
| .RUG | | .RUG | ||
− | | | + | | System sphere breakpoint to RUG |
− | | | + | | colspan="4" | - |
− | | | + | | - |
|- | |- | ||
| 31 | | 31 | ||
| .GERRW | | .GERRW | ||
− | | | + | | Get error word |
− | | | + | | colspan="4" | - |
− | | | + | | (Variable) |
|- | |- | ||
| 32 | | 32 | ||
| .TIME | | .TIME | ||
− | | | + | | Get or set time |
− | | | + | | colspan="4" | Address of six words: seconds, minutes, hours, days, months, years |
− | | | + | | - |
|- | |- | ||
| 33 | | 33 | ||
− | | . | + | | .SYSJB |
− | | | + | | Perform system job |
− | | | + | | colspan="4" | - |
− | | | + | | - |
|- | |- | ||
| 34 | | 34 | ||
| .GETID | | .GETID | ||
− | | | + | | Get process id |
− | | | + | | colspan="4" | - |
− | | | + | | Id |
|- | |- | ||
| 35 | | 35 | ||
| .MFPI | | .MFPI | ||
− | | | + | | Read word from instruction address space |
− | | | + | | colspan="4" | Address |
− | | | + | | Data |
|- | |- | ||
| 36 | | 36 | ||
| .OSPAC | | .OSPAC | ||
− | | | + | | (?) |
− | | | + | | colspan="4" | |
− | | | + | | - |
|} | |} | ||
+ | |||
+ | The .INVOK call is further decoded from the function: | ||
+ | |||
+ | {| class="wikitable" | ||
+ | ! Number | ||
+ | ! Name | ||
+ | ! Description | ||
+ | ! Input | ||
+ | |- | ||
+ | | 200 | ||
+ | | .DELCP | ||
+ | | Delete capacity | ||
+ | | - | ||
+ | |- | ||
+ | | 201 | ||
+ | | .CPYCP | ||
+ | | Copy capacity | ||
+ | | Control bits to clear | ||
+ | |- | ||
+ | | 202 | ||
+ | | .GIVCP | ||
+ | | Give capacity to another sphere | ||
+ | | Source | ||
+ | |- | ||
+ | | 203 | ||
+ | | .TAKCP | ||
+ | | Take capacity from the sphere | ||
+ | | C-list | ||
+ | |} | ||
+ | |||
+ | [[Category: PDP-11 Operating Systems]] | ||
+ | [[Category: Non-DEC Operating Systems]] |
Latest revision as of 22:45, 26 March 2023
SITS system calls were done using EMT in older versions, and TRAP in newer. The system call number makes up the lower 7 bits. Bit 200 can be set to have the call fault on error, in which case a $ replaces the . in the symbolic name.
System call inputs are popped off the stack, and outputs are pushed. On error, the Z flag is set and arguments are left on the stack. In the table below, (C) indicates a capability.
Number | Name | Description | Inputs | Outputs | |||
---|---|---|---|---|---|---|---|
0 | .NOOP | - | - | - | |||
1 | .FORK | Create new process | Entry point | - | |||
2 | .POOFF | Kill this process | - | - | |||
3 | .SLEEP | Sleep | Time (least significant) | Time (most significant) | - | ||
4 | .SINK | Disable floating point | - | - | |||
5 | .FLOAT | Enable floating point | - | - | |||
6 | .INVOK | Invoke capability | Function,,capability (C) | argument | argument | (Variable) | |
7 | .QULK | Lock queue | Queue (C) | - | |||
10 | .QUNLK | Unlock queue | Queue (C) | - | |||
11 | .TTGIV | Give TTY away | Master sphere (C) | Teletype (C) | - | ||
12 | .TTGET | Get the TTY | Teletype (C) | - | |||
13 | .WRDI | Word input | File (C) | Data | |||
14 | .WRDO | Word output | File (C) | - | |||
15 | .BYTI | Byte input | File (C) | Data | |||
16 | .BYTO | Byte output | File (C) | - | |||
17 | .BLKI | Block input File (C) | File (C) | Length | Address | - | |
20 | .BLKO | Block output | File (C) | Length | Address | - | |
21 | .MAP | Create page | Access,,sphere (C) | Destination page,,source type | Source page | Page length,,page offset | - |
22 | .ALLOC | Allocate swap | Size | Start | Disk | - | |
23 | .CRUSR | Make this a user process | Copy name | Length of name | Pointer to name | - | |
24 | .RDMAP | Read map | Sphere (C) | Address | - | ||
25 | .FONT | Read or write font | Function,,font | Address | - | ||
26 | .SSTAT | Read system status | Address | - | |||
27 | .VIDSW | Set video switch modes | Source | Destination | - | ||
30 | .RUG | System sphere breakpoint to RUG | - | - | |||
31 | .GERRW | Get error word | - | (Variable) | |||
32 | .TIME | Get or set time | Address of six words: seconds, minutes, hours, days, months, years | - | |||
33 | .SYSJB | Perform system job | - | - | |||
34 | .GETID | Get process id | - | Id | |||
35 | .MFPI | Read word from instruction address space | Address | Data | |||
36 | .OSPAC | (?) | - |
The .INVOK call is further decoded from the function:
Number | Name | Description | Input |
---|---|---|---|
200 | .DELCP | Delete capacity | - |
201 | .CPYCP | Copy capacity | Control bits to clear |
202 | .GIVCP | Give capacity to another sphere | Source |
203 | .TAKCP | Take capacity from the sphere | C-list |