-uint32_t BigBuf[10000];
-// BIG CHANGE - UNDERSTAND THIS BEFORE WE COMMIT
-#define TRACE_OFFSET 0
-#define TRACE_SIZE 3000
-#define RECV_CMD_OFFSET 3032
-#define RECV_CMD_SIZE 64
-#define RECV_RES_OFFSET 3096
-#define RECV_RES_SIZE 64
-#define DMA_BUFFER_OFFSET 3160
-#define DMA_BUFFER_SIZE 4096
-#define FREE_BUFFER_OFFSET 7256
-#define FREE_BUFFER_SIZE 2744
+#define BIGBUF_SIZE 40000
+uint32_t BigBuf[BIGBUF_SIZE / sizeof(uint32_t)];
+#define TRACE_OFFSET 0
+#define TRACE_SIZE 3000
+#define RECV_CMD_OFFSET (TRACE_OFFSET + TRACE_SIZE)
+#define MAX_FRAME_SIZE 256
+#define MAX_PARITY_SIZE ((MAX_FRAME_SIZE + 1)/ 8)
+#define RECV_CMD_PAR_OFFSET (RECV_CMD_OFFSET + MAX_FRAME_SIZE)
+#define RECV_RESP_OFFSET (RECV_CMD_PAR_OFFSET + MAX_PARITY_SIZE)
+#define RECV_RESP_PAR_OFFSET (RECV_RESP_OFFSET + MAX_FRAME_SIZE)
+#define CARD_MEMORY_OFFSET (RECV_RESP_PAR_OFFSET + MAX_PARITY_SIZE)
+#define CARD_MEMORY_SIZE 4096
+#define DMA_BUFFER_OFFSET CARD_MEMORY_OFFSET
+#define DMA_BUFFER_SIZE CARD_MEMORY_SIZE
+#define FREE_BUFFER_OFFSET (CARD_MEMORY_OFFSET + CARD_MEMORY_SIZE)
+#define FREE_BUFFER_SIZE (BIGBUF_SIZE - FREE_BUFFER_OFFSET - 1)