diff --git a/CHANGELOG.org b/CHANGELOG.org
index ab26d99..fb72e1d 100644
--- a/CHANGELOG.org
+++ b/CHANGELOG.org
@@ -17,6 +17,8 @@
 * Current
 ** Added
 Added support for envp in cc_x86.s
+Added support for --POSIX-MODE to allow cross-platform testing to be easier
+Expanded the disassembler's support of HALCODE to include POSIX instructions
 
 ** Changed
 Reduced stack usage thanks to akkartik
diff --git a/High_level_prototypes/disasm.c b/High_level_prototypes/disasm.c
index 929b68d..b95b7bb 100644
--- a/High_level_prototypes/disasm.c
+++ b/High_level_prototypes/disasm.c
@@ -1384,6 +1384,11 @@ void decode_HALCODE(struct Instruction* c)
 			strncpy(Name, "EXIT", 19);
 			break;
 		}
+		case 0x00003F: /* UNAME */
+		{
+			strncpy(Name, "UNAME", 19);
+			break;
+		}
 		case 0x00005A: /* CHMOD */
 		{
 			strncpy(Name, "CHMOD", 19);
diff --git a/ISA_HEX_Map.org b/ISA_HEX_Map.org
index c9f1c13..c9db01b 100644
--- a/ISA_HEX_Map.org
+++ b/ISA_HEX_Map.org
@@ -471,6 +471,7 @@ mappings have been exposed for use.
 | 42 00 00 03 | FCLOSE | close(int FD) using R0                                                     |
 | 42 00 00 08 | FSEEK  | seek(int FD, off_t OFFSET, int WHENCE) using R0, R1 and R2 respectively    |
 | 42 00 00 3C | EXIT   | exit(int ERROR_CODE) using R0                                              |
+| 42 00 00 3F | UNAME  | uname(struct utsname* BUF) using R0                                        |
 | 42 00 00 5A | CHMOD  | chmod(char* PATHNAME, int MODE) using R0 and R1 respectively               |
 |-------------+--------+----------------------------------------------------------------------------|
 | 42 10 01 00 | FGETC  | read 1 byte into register 0 from device who's ID is in register 1          |
diff --git a/vm.h b/vm.h
index 06cfa0d..37a59f8 100644
--- a/vm.h
+++ b/vm.h
@@ -29,6 +29,7 @@ typedef __uint256_t unsigned_vm_register;
 #define umax 256
 #define imax 255
 #define reg_size 32
+#define arch_name "knight256-base"
 #elif VM128
 typedef __int256_t signed_wide_register;
 typedef __uint256_t unsigned_wide_register;
@@ -37,6 +38,7 @@ typedef __uint128_t unsigned_vm_register;
 #define umax 128
 #define imax 127
 #define reg_size 16
+#define arch_name "knight128-base"
 #elif VM64
 typedef __int128_t signed_wide_register;
 typedef __uint128_t unsigned_wide_register;
@@ -45,6 +47,7 @@ typedef uint64_t unsigned_vm_register;
 #define umax 64
 #define imax 63
 #define reg_size 8
+#define arch_name "knight64-base"
 #elif VM32
 typedef int64_t signed_wide_register;
 typedef uint64_t unsigned_wide_register;
@@ -53,6 +56,7 @@ typedef uint32_t unsigned_vm_register;
 #define umax 32
 #define imax 31
 #define reg_size 4
+#define arch_name "knight32-base"
 #else
 typedef int32_t signed_wide_register;
 typedef uint32_t unsigned_wide_register;
@@ -61,6 +65,7 @@ typedef uint16_t unsigned_vm_register;
 #define umax 16
 #define imax 15
 #define reg_size 2
+#define arch_name "knight16-base"
 #endif
 
 /* Virtual machine state */
@@ -96,6 +101,7 @@ struct Instruction
 /* Prototypes for functions in vm_instructions.c*/
 void vm_EXIT(struct lilith* vm, uint64_t performance_counter);
 void vm_CHMOD(struct lilith* vm);
+void vm_UNAME(struct lilith* vm);
 void vm_FOPEN(struct lilith* vm);
 void vm_FOPEN_READ(struct lilith* vm);
 void vm_FOPEN_WRITE(struct lilith* vm);
diff --git a/vm_decode.c b/vm_decode.c
index 733dcad..f4818b0 100644
--- a/vm_decode.c
+++ b/vm_decode.c
@@ -280,6 +280,17 @@ bool eval_HALCODE(struct lilith* vm, struct Instruction* c)
 				vm_EXIT(vm, performance_counter);
 				break;
 			}
+			case 0x00003F: /* UNAME */
+			{
+				#ifdef DEBUG
+				strncpy(Name, "UNAME", 19);
+				#elif TRACE
+				record_trace("UNAME");
+				#endif
+
+				vm_UNAME(vm);
+				break;
+			}
 			case 0x00005A: /* CHMOD */
 			{
 				#ifdef DEBUG
diff --git a/vm_instructions.c b/vm_instructions.c
index a390003..138d56e 100644
--- a/vm_instructions.c
+++ b/vm_instructions.c
@@ -55,6 +55,16 @@ void writeout_bytes(struct lilith* vm, unsigned_vm_register pointer, unsigned_vm
 	}
 }
 
+void writeout_string(struct lilith* vm, char* s, unsigned_vm_register pointer)
+{
+	while(0 != s[0])
+	{
+		vm->memory[pointer] = s[0];
+		pointer = pointer + 1;
+		s = s + 1;
+	}
+}
+
 /* Allow the use of native data format for Register operations */
 unsigned_vm_register readin_bytes(struct lilith* vm, unsigned_vm_register pointer, bool Signed, int count)
 {
@@ -154,6 +164,15 @@ void vm_CHMOD(struct lilith* vm)
 	free(s);
 }
 
+void vm_UNAME(struct lilith* vm)
+{
+	writeout_string(vm, "sysname", vm->reg[0]);
+	writeout_string(vm, "nodename", vm->reg[0] + 65);
+	writeout_string(vm, "release", vm->reg[0] + 130);
+	writeout_string(vm, "version", vm->reg[0] + 195);
+	writeout_string(vm, arch_name, vm->reg[0] + 260);
+}
+
 void vm_FOPEN(struct lilith* vm)
 {
 	char* s = string_copy(vm, vm->reg[0]);