net_tulip: L80225 transceiver emulation

src/network/net_l80225.c

@@ -0,0 +1,42 @@
+#include <stdint.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <string.h>
+#include <stdio.h>
+
+#include <86box/86box.h>
+#include <86box/timer.h>
+#include <86box/pci.h>
+#include <86box/io.h>
+#include <86box/mem.h>
+#include <86box/dma.h>
+#include <86box/device.h>
+#include <86box/thread.h>
+#include <86box/network.h>
+
+uint16_t
+l80225_mii_readw(uint16_t* regs, uint16_t addr)
+{
+    switch (addr)
+    {
+        case 0x1:
+            return 0x782D;
+        case 0x2:
+            return 0b10110;
+        case 0x3:
+            return 0xF830;
+        case 0x5:
+            return 0x41E1;
+        case 0x18:
+            return 0xC0;
+        default:
+            return regs[addr];
+    }
+    return 0;
+}
+
+void
+l80225_mii_writew(uint16_t* regs, uint16_t addr, uint16_t val)
+{
+    regs[addr] = val;
+}