Initial commit for GitHub migration based on spice2x-25-03-03

src/spice2x/acio2emu/firmware/bi2x.cpp

@@ -0,0 +1,67 @@
+#include "bi2x.h"
+
+namespace acio2emu::firmware {
+    bool BI2XNode::handle_packet(const acio2emu::Packet &in, std::vector<uint8_t> &out) {
+        auto cur = in.payload.begin();
+        while ((cur + 1) < in.payload.end()) {
+            auto cmd = (cur[0] << 8) | cur[1];
+            out.push_back(*cur++);
+            out.push_back(*cur++);
+            out.push_back(0);
+
+            switch (cmd) {
+            case 2: // query firmware version
+                read_firmware_version(out);
+                cur = in.payload.end();
+                break;
+            
+            case 16:
+                out.push_back(2);
+                cur = in.payload.end();
+                break;
+
+            case 800:
+            case 802:
+            case 19:
+                cur = in.payload.end();
+                break;
+
+            case 120:
+                out.push_back(3);
+                cur = in.payload.end();
+                break;
+
+            case 801:
+                out.push_back(33);
+                out.push_back(0);
+                cur = in.payload.end();
+                break;
+
+            case 784: // poll input
+                if (!read_input(out)) {
+                    return false;
+                }
+                break;
+
+            case 785: { // write output
+                auto count = write_output(std::span{&*cur, static_cast<size_t>(in.payload.end() - cur)});
+                if (count < 0) {
+                    return false;
+                }
+                cur += count;
+                break;
+            }
+
+            case 786:
+                cur += 4;
+                break;
+
+            default:
+                log_warning("bi2x", "unknown command: {}", cmd);
+                return false;
+            }
+        } 
+
+        return true;
+    }
+}