firmware: Correct segment names

Author: tuxuser

README.md

@@ -62,4 +62,5 @@ See [firmware/](./firmware/) for build & flash instructions.
 
 - [AssemblerGames](https://web.archive.org/web/20250327165519/https://assemblergames.org/viewtopic.php?p=870129) - first mentioning of FACET2 PCB
 - [FACET on xosft wiki](https://xboxoneresearch.github.io/wiki/hardware/facet/) - Technical documentation of FACET port
+- [POST code on xosft wiki](https://xboxoneresearch.github.io/wiki/hardware/post/) - Original MAX6958A circuit and error codes
 - [libaspect2](https://github.com/xboxoneresearch/libaspect2) - Attempt at an open source library

firmware/Core/Src/display.c

@@ -18,12 +18,14 @@ void Display_Init(void)
 
 const char *get_segment_name(uint8_t seg) {
   switch (seg & 0xF0) {
-    case 0x70:
-      return "OS";
-    case 0x30:
-      return "SP";
     case 0x10:
+      return "CPU";
+    case 0x30:
+      return "PSP";
+    case 0x70:
       return "SMC";
+    case 0xF0:
+      return "OS";
     default:
       return "???";
   }