Index: kernel/genarch/include/drivers/via-cuda/cuda.h
===================================================================
--- kernel/genarch/include/drivers/via-cuda/cuda.h	(revision c2417bcc6cc9caba6dca867e322c9cc5723b35f4)
+++ kernel/genarch/include/drivers/via-cuda/cuda.h	(revision 925be4ecd563f177285f5d0da2d0bf42b4bb85f6)
@@ -39,7 +39,59 @@
 #include <arch/types.h>
 #include <console/chardev.h>
+#include <synch/spinlock.h>
 
 typedef struct {
+	uint8_t b;
+	uint8_t pad0[0x1ff];
+
+	uint8_t a;
+	uint8_t pad1[0x1ff];
+
+	uint8_t dirb;
+	uint8_t pad2[0x1ff];
+
+	uint8_t dira;
+	uint8_t pad3[0x1ff];
+
+	uint8_t t1cl;
+	uint8_t pad4[0x1ff];
+
+	uint8_t t1ch;
+	uint8_t pad5[0x1ff];
+
+	uint8_t t1ll;
+	uint8_t pad6[0x1ff];
+
+	uint8_t t1lh;
+	uint8_t pad7[0x1ff];
+
+	uint8_t t2cl;
+	uint8_t pad8[0x1ff];
+
+	uint8_t t2ch;
+	uint8_t pad9[0x1ff];
+
+	uint8_t sr;
+	uint8_t pad10[0x1ff];
+
+	uint8_t acr;
+	uint8_t pad11[0x1ff];
+
+	uint8_t pcr;
+	uint8_t pad12[0x1ff];
+
+	uint8_t ifr;
+	uint8_t pad13[0x1ff];
+
+	uint8_t ier;
+	uint8_t pad14[0x1ff];
+
+	uint8_t anh;
+	uint8_t pad15[0x1ff];
 } cuda_t;
+
+enum {
+	CUDA_RCV_BUF_SIZE = 5
+};
 
 typedef struct {
@@ -47,4 +99,6 @@
 	cuda_t *cuda;
 	indev_t *kbrdin;
+	uint8_t rcv_buf[CUDA_RCV_BUF_SIZE];
+	SPINLOCK_DECLARE(dev_lock);
 } cuda_instance_t;