diff --git a/kernel/sysabi.md b/kernel/sysabi.md
index 946f68a..d00f8ec 100644
--- a/kernel/sysabi.md
+++ b/kernel/sysabi.md
@@ -54,11 +54,12 @@ The following calls should be implemented to some degree in noxos 1.0.
 | 0x0207 | `nx_proc_thread_kill`        | Kills the current processes' thread with thread id _tid_.                                                                                 | tid    |          |      |      | status | N/A    |
 
 ## Drivers
-| ID     | Name                           | Description                                                                                                                                                                                                                                                                                                                                                                                           | Arg1 | Arg2 | Arg3  | Arg4 | Result | Status | 
-|--------|--------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------|------|-------|------|--------|--------|
-| 0x0301 | `nx_drv_register`              | Registers the executable at the _n_ bytes long _path_ as driver with the configuration _conf_. The format of the conf struct can be found below.                                                                                                                                                                                                                                                      | path | len  | *conf |      | status | N/A    |
-| 0x0302 | `nx_drv_create_command_buffer` | This has to be called from a driver. Registers _addr_ as command queue buffer with the length _len_, which has to be greater or equal 16384. If _addr_ is NULL or not aligned to 32 bytes or _len_ is less than 16384, the kernel will map a command queue buffer into the drivers address space, which is of length _len_ but at least 16384. The address to the registered buffer will be returned. | addr | len  |       |      | addr   | N/A    |
-| 0x0303 | `nx_drv_flush_command_buffer`  | This has to be called from a driver. Flushes the command queue buffer at _addr_.                                                                                                                                                                                                                                                                                                                      | addr |      |       |      | status | N/A    |
+| ID     | Name                           | Description                                                                                                                                                                                                                                                                                                                                                                                           | Arg1  | Arg2 | Arg3 | Arg4 | Result | Status | 
+|--------|--------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------|------|------|------|--------|--------|
+| 0x0301 | `nx_drv_register`              | Registers the executable at the file descriptor _fd_ as driver.                                                                                                                                                                                                                                                                                                                                       | fd    |      |      |      | status | N/A    |
+| 0x0302 | `nx_drv_init`                  | This has to be called from a driver. This can only be called once per driver. Initializes the calling driver process with the configuration _conf_. The format of the conf struct can be found below.                                                                                                                                                                                                 | *conf |      |      |      | status | N/A    |
+| 0x0303 | `nx_drv_create_command_buffer` | This has to be called from a driver. Registers _addr_ as command queue buffer with the length _len_, which has to be greater or equal 16384. If _addr_ is NULL or not aligned to 32 bytes or _len_ is less than 16384, the kernel will map a command queue buffer into the drivers address space, which is of length _len_ but at least 16384. The address to the registered buffer will be returned. | addr  | len  |      |      | addr   | N/A    |
+| 0x0304 | `nx_drv_flush_command_buffer`  | This has to be called from a driver. Flushes the command queue buffer at _addr_.                                                                                                                                                                                                                                                                                                                      | addr  |      |      |      | status | N/A    |
 
 ## Kernel
 These syscalls can only be called from the kernel process.