diff --git a/docs/changelog/roadmap.md b/docs/changelog/roadmap.md
index 96127e4..4a51ede 100644
--- a/docs/changelog/roadmap.md
+++ b/docs/changelog/roadmap.md
@@ -44,7 +44,7 @@ Currently, I have two options:
 
 ### Current status
 
-Work on PingusVM have been started. At worst there will be an assembly-like scripting language, with options to write a compiler.
+~~Work on PingusVM have been started. At worst there will be an assembly-like scripting language, with options to write a compiler.~~ Dropped in favor of a binding to wasmtime.
 
 ## Path management
 
@@ -64,7 +64,7 @@ Added benefits are speed (10 000+ objects per frame!), the possibility of low-re
 
 ### Pre-requirements
 
-Mostly finishing iota to a state it can replace the current SDL functionality.
+Mostly finishing iota to a state it can replace the current SDL functionality. (DONE!)
 
 ### Things probably need to be changed before, through, or after the GPU transition
 
diff --git a/docs/formats/imbc.md b/docs/formats/imbc.md
index 995f3d8..dfe7add 100644
--- a/docs/formats/imbc.md
+++ b/docs/formats/imbc.md
@@ -391,13 +391,13 @@ Bytecode layout:
 ```
 or
 ```
-[02]{24 most significant bits of time value}{32 least significant bits of time value}
+[02]{24 least significant bits of time value}{32 most significant bits of time value}
 ```
 
 Human-readable format:
 
 ```
-wait {int}
+wait {number of tics in time format}
 ```
 or
 ```
@@ -639,10 +639,20 @@ Control commands are used to control the processing of the file in real time.
 
 #### Set register
 
-`ctrl setReg R25 6181`
+`ctrl setReg [Register] [Data to be written to register]`
+
+`0xF0 0x01 [register number: 8 bits] [padding: 8 bits] [data to be written to register 32 bits]`
 
 `0x01`/`setReg` will set the register value specified by command code
 
+#### Sync for external chain
+
+`ctrl syncXC [sync flags as hexanumeric data]`
+
+`0xF0 0x02 [sync flags: 16 bits]`
+
+`0x02`/`syncXC` tells the sequencer that it's okay to process synchronized (external) pattern branching commands with the given flags.
+
 ## Display command
 
 Bytecode layout: