QuNexus v2.2.1 firmware: reverse-engineered disassembly & pseudocode

Decompiled from stock QuNexus_Firmware_v2.2.1.bin (EFM8UB20F64G / 8051,
base 0x2400, 54279 bytes) with radare2 6.2.0.

- qunexus_v2.2.1.asm : full linear disassembly (37287 lines, byte-faithful)
- pseudocode_all.c   : r2 pdc pseudocode for all 1002 functions
- functions.txt     : function index (1002 functions)
- regen.sh + r2script.r2 : one-command reproduction (brew install radare2)

Verified: reconstructing the binary from the asm byte-columns reproduces the
original image byte-for-byte (30560 instructions + 195 data gaps).

regen.sh

@@ -0,0 +1,8 @@
+#!/bin/sh
+# regen.sh -- regenerate the disassembly & pseudocode from the stock binary.
+# Requires radare2 (>=6.x):  brew install radare2
+set -e
+BIN=QuNexus_Firmware_v2.2.1.bin
+command -v r2 >/dev/null || { echo "radare2 (r2) not found; brew install radare2"; exit 1; }
+r2 -a 8051 -b 8 -m 0x2400 -q -i r2script.r2 "$BIN" 2>&1 | grep -vE "^WARN|^INFO"
+echo "regenerated: functions.txt qunexus_v2.2.1.asm pseudocode_all.c"