Index: hw/fdc.c
===================================================================
--- hw/fdc.c	(revision 4215)
+++ hw/fdc.c	(working copy)
@@ -46,6 +46,9 @@
 /********************************************************/
 /* Floppy drive emulation                               */
 
+#define GET_CUR_DRV(fdctrl) ((fdctrl)->cur_drv)
+#define SET_CUR_DRV(fdctrl, drive) ((fdctrl)->cur_drv = (drive))
+
 /* Will always be a fixed parameter for us */
 #define FD_SECTOR_LEN 512
 #define FD_SECTOR_SC  2   /* Sector size code */
@@ -706,7 +709,7 @@
 
     if (level) {
         // XXX
-        FLOPPY_DPRINTF("TC pulsed\n");
+        FLOPPY_DPRINTF("Terminal Count Line pulsed\n");
     }
 }
 
@@ -798,7 +801,7 @@
 
 static fdrive_t *get_cur_drv (fdctrl_t *fdctrl)
 {
-    switch (fdctrl->dor & FD_DOR_SELMASK) {
+    switch (GET_CUR_DRV(fdctrl)) {
         case 0: return drv0(fdctrl);
         case 1: return drv1(fdctrl);
 #if MAX_FD == 4
@@ -1036,7 +1039,7 @@
 
     cur_drv = get_cur_drv(fdctrl);
     /* Add head and drive to status0 */
-    status0 |= (cur_drv->head << 2) | (fdctrl->cur_drv);
+    status0 |= (cur_drv->head << 2) | GET_CUR_DRV(fdctrl);
 
     FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
                    fdctrl->status0, fdctrl->status1, fdctrl->status2,
@@ -1063,13 +1066,13 @@
     fdrive_t *cur_drv;
     uint8_t kh, kt, ks;
 
-    fdctrl->cur_drv = fdctrl->fifo[1] & FD_DOR_SELMASK;
+    SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
     cur_drv = get_cur_drv(fdctrl);
     kt = fdctrl->fifo[2];
     kh = fdctrl->fifo[3];
     ks = fdctrl->fifo[4];
     FLOPPY_DPRINTF("Start transfer at %d %d %02x %02x (%d)\n",
-                   fdctrl->cur_drv, kh, kt, ks,
+                   GET_CUR_DRV(fdctrl), kh, kt, ks,
                    _fd_sector(kh, kt, ks, cur_drv->last_sect));
     switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & FD_CONFIG_EIS)) {
     case 2:
@@ -1200,7 +1203,7 @@
             len = FD_SECTOR_LEN - rel_pos;
         FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x "
                        "(%d-0x%08x 0x%08x)\n", len, dma_len, fdctrl->data_pos,
-                       fdctrl->data_len, fdctrl->cur_drv, cur_drv->head,
+                       fdctrl->data_len, GET_CUR_DRV(fdctrl), cur_drv->head,
                        cur_drv->track, cur_drv->sect, fd_sector(cur_drv),
                        fd_sector(cur_drv) * FD_SECTOR_LEN);
         if (fdctrl->data_dir != FD_DIR_WRITE ||
@@ -1326,13 +1329,13 @@
     fdrive_t *cur_drv;
     uint8_t kh, kt, ks;
 
-    fdctrl->cur_drv = fdctrl->fifo[1] & FD_DOR_SELMASK;
+    SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
     cur_drv = get_cur_drv(fdctrl);
     kt = fdctrl->fifo[6];
     kh = fdctrl->fifo[7];
     ks = fdctrl->fifo[8];
     FLOPPY_DPRINTF("format sector at %d %d %02x %02x (%d)\n",
-                   fdctrl->cur_drv, kh, kt, ks,
+                   GET_CUR_DRV(fdctrl->dor), kh, kt, ks,
                    _fd_sector(kh, kt, ks, cur_drv->last_sect));
     switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & FD_CONFIG_EIS)) {
     case 2:
@@ -1499,7 +1502,7 @@
 {
     fdrive_t *cur_drv;
 
-    fdctrl->cur_drv = fdctrl->fifo[1] & FD_DOR_SELMASK;
+    SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
     cur_drv = get_cur_drv(fdctrl);
     fdctrl->data_state |= FD_STATE_FORMAT;
     if (fdctrl->fifo[0] & 0x80)
@@ -1539,14 +1542,14 @@
 {
     fdrive_t *cur_drv;
 
-    fdctrl->cur_drv = fdctrl->fifo[1] & FD_DOR_SELMASK;
+    SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
     cur_drv = get_cur_drv(fdctrl);
     cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
     /* 1 Byte status back */
     fdctrl->fifo[0] = (cur_drv->ro << 6) |
         (cur_drv->track == 0 ? 0x10 : 0x00) |
         (cur_drv->head << 2) |
-        fdctrl->cur_drv |
+        GET_CUR_DRV(fdctrl) |
         0x28;
     fdctrl_set_fifo(fdctrl, 1, 0);
 }
@@ -1555,7 +1558,7 @@
 {
     fdrive_t *cur_drv;
 
-    fdctrl->cur_drv = fdctrl->fifo[1] & FD_DOR_SELMASK;
+    SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
     cur_drv = get_cur_drv(fdctrl);
     fd_recalibrate(cur_drv);
     fdctrl_reset_fifo(fdctrl);
@@ -1569,7 +1572,7 @@
     fdrive_t *cur_drv = get_cur_drv(fdctrl);
 
     fdctrl->fifo[0] =
-        fdctrl->status0 | (cur_drv->head << 2) | fdctrl->cur_drv;
+        fdctrl->status0 | (cur_drv->head << 2) | GET_CUR_DRV(fdctrl);
     fdctrl->fifo[1] = cur_drv->track;
     fdctrl_set_fifo(fdctrl, 2, 0);
     fdctrl_reset_irq(fdctrl);
@@ -1580,7 +1583,7 @@
 {
     fdrive_t *cur_drv;
 
-    fdctrl->cur_drv = fdctrl->fifo[1] & FD_DOR_SELMASK;
+    SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
     cur_drv = get_cur_drv(fdctrl);
     fdctrl_reset_fifo(fdctrl);
     fdctrl->status0 |= FD_SR0_SEEK;
@@ -1640,16 +1643,16 @@
     } else if (fdctrl->data_len > 7) {
         /* ERROR */
         fdctrl->fifo[0] = 0x80 |
-            (cur_drv->head << 2) | fdctrl->cur_drv;
+            (cur_drv->head << 2) | GET_CUR_DRV(fdctrl->dor);
         fdctrl_set_fifo(fdctrl, 1, 1);
     }
 }
 
 static void fdctrl_handle_relative_seek_out (fdctrl_t *fdctrl, int direction)
 {
-    fdrive_t *cur_drv = get_cur_drv(fdctrl);
+    fdrive_t *cur_drv;
 
-    fdctrl->cur_drv = fdctrl->fifo[1] & FD_DOR_SELMASK;
+    SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
     cur_drv = get_cur_drv(fdctrl);
     if (fdctrl->fifo[2] + cur_drv->track >= cur_drv->max_track) {
         cur_drv->track = cur_drv->max_track - 1;
@@ -1663,9 +1666,9 @@
 
 static void fdctrl_handle_relative_seek_in (fdctrl_t *fdctrl, int direction)
 {
-    fdrive_t *cur_drv = get_cur_drv(fdctrl);
+    fdrive_t *cur_drv;
 
-    fdctrl->cur_drv = fdctrl->fifo[1] & FD_DOR_SELMASK;
+    SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
     cur_drv = get_cur_drv(fdctrl);
     if (fdctrl->fifo[2] > cur_drv->track) {
         cur_drv->track = 0;