diff --git a/arch/sparc32/aoutload.c b/arch/sparc32/aoutload.c
index b85561b..29defac 100644
--- a/arch/sparc32/aoutload.c
+++ b/arch/sparc32/aoutload.c
@@ -65,6 +65,7 @@ int aout_load(struct sys_info *info, const char *filename, const char *cmdline)
 	goto out;
 
     for (offset = 0; offset < 16 * 512; offset += 512) {
+        file_seek(offset);
         if (lfile_read(&ehdr, sizeof ehdr) != sizeof ehdr) {
             debug("Can't read a.out header\n");
             retval = LOADER_NOT_SUPPORT;
@@ -72,8 +73,6 @@ int aout_load(struct sys_info *info, const char *filename, const char *cmdline)
         }
         if (!N_BADMAG(ehdr))
             break;
-
-        file_seek(offset);
     }
 
     if (N_BADMAG(ehdr)) {
diff --git a/arch/sparc32/ldscript b/arch/sparc32/ldscript
index f885b98..884ca07 100644
--- a/arch/sparc32/ldscript
+++ b/arch/sparc32/ldscript
@@ -14,7 +14,7 @@ BASE_ADDR = 0xffd00000;
 HEAP_SIZE = 16384;
 STACK_SIZE = 16384;
 VMEM_SIZE = 128 * 1024;
-IOMEM_SIZE = 128 * 1024;
+IOMEM_SIZE = 256 * 1024;
 
 SECTIONS
 {
diff --git a/drivers/esp.c b/drivers/esp.c
index f7b45a4..ed4b3a4 100644
--- a/drivers/esp.c
+++ b/drivers/esp.c
@@ -140,9 +140,11 @@ do_command(esp_private_t *esp, sd_private_t *sd, int cmdlen, int replylen)
 
 // offset is multiple of 512, len in bytes
 static int
-ob_sd_read_sectors(esp_private_t *esp, sd_private_t *sd, int offset, void *dest, short len)
+ob_sd_read_sectors(esp_private_t *esp, sd_private_t *sd, int offset, void *dest,
+                   short len, short sect_offset)
 {
-    DPRINTF("ob_sd_read_sectors id %d %lx block=%d len=%d\n", sd->id, (unsigned long)dest, offset, len);
+    DPRINTF("ob_sd_read_sectors id %d %lx sector=%d len=%d soff %d\n",
+            sd->id, (unsigned long)dest, offset, len, sect_offset);
 
     // Setup command = Read(10)
     memset(esp->buffer, 0, 10);
@@ -157,10 +159,10 @@ ob_sd_read_sectors(esp_private_t *esp, sd_private_t *sd, int offset, void *dest,
     esp->buffer[8] = (len >> 8) & 0xff;
     esp->buffer[9] = len & 0xff;
 
-    if (do_command(esp, sd, 10, len * 512))
+    if (do_command(esp, sd, 10, len * 512 + sect_offset))
         return 0;
 
-    memcpy(dest, esp->buffer, len * 512);
+    memcpy(dest, esp->buffer + sect_offset, len * 512);
 
     return 0;
 }
@@ -179,12 +181,8 @@ read_capacity(esp_private_t *esp, sd_private_t *sd)
 
         return 0;
     }
-    sd->sectors =  (esp->buffer[0] << 24) | (esp->buffer[1] << 16) | (esp->buffer[2] << 8) | esp->buffer[3];
-#if 0
     sd->bs = (esp->buffer[4] << 24) | (esp->buffer[5] << 16) | (esp->buffer[6] << 8) | esp->buffer[7];
-#else
-    sd->bs = 512;
-#endif
+    sd->sectors = ((esp->buffer[0] << 24) | (esp->buffer[1] << 16) | (esp->buffer[2] << 8) | esp->buffer[3]) * (sd->bs / 512);
 
     return 1;
 }
@@ -232,16 +230,20 @@ ob_sd_read_blocks(sd_private_t **sd)
     cell n = POP(), cnt = n;
     ucell blk = POP();
     char *dest = (char*)POP();
+    int pos, spb, sect_offset;
 
     DPRINTF("ob_sd_read_blocks id %d %lx block=%d n=%d\n", (*sd)->id, (unsigned long)dest, blk, n );
 
-    n *= (*sd)->bs / 512;
+    spb = (*sd)->bs / 512;
     while (n) {
-        if (ob_sd_read_sectors(global_esp, *sd, blk, dest, 1)) {
-            DPRINTF("ob_ide_read_blocks: error\n");
+        sect_offset = blk / spb;
+        pos = (blk - sect_offset * spb) * 512;
+
+        if (ob_sd_read_sectors(global_esp, *sd, sect_offset, dest, 1, pos)) {
+            DPRINTF("ob_sd_read_blocks: error\n");
             RET(0);
         }
-        dest += (*sd)->bs;
+        dest += 512;
         n--;
         blk++;
     }
@@ -249,9 +251,9 @@ ob_sd_read_blocks(sd_private_t **sd)
 }
 
 static void
-ob_sd_block_size(sd_private_t **sd)
+ob_sd_block_size(__attribute__((unused))sd_private_t **sd)
 {
-    PUSH((*sd)->bs);
+    PUSH(512);
 }
 
 static void
diff --git a/forth/admin/nvram.fs b/forth/admin/nvram.fs
index 3b7d3f7..b6d4cdf 100644
--- a/forth/admin/nvram.fs
+++ b/forth/admin/nvram.fs
@@ -344,6 +344,17 @@ no-conf-def " security-mode"        secmode-config
 " true"     " little-endian?"       bool-config
 [THEN]
 
+[IFDEF] CONFIG_SPARC32
+\ ---- SPARC32 ----
+" true"     " tpe-link-test?"        bool-config
+" 9600,8,n,1,-" " ttya-mode"         str-config
+" true"     " ttya-ignore-cd"        bool-config
+" false"    " ttya-rts-dtr-off"      bool-config
+" 9600,8,n,1,-" " ttyb-mode"         str-config
+" true"     " ttyb-ignore-cd"        bool-config
+" false"    " ttyb-rts-dtr-off"      bool-config
+[THEN]
+
 \ --- ??? ---
 " "         " boot-screen"          str-config
 " "         " boot-script"          str-config
diff --git a/modules/sun-parts.c b/modules/sun-parts.c
index 30a71be..8425552 100644
--- a/modules/sun-parts.c
+++ b/modules/sun-parts.c
@@ -119,7 +119,7 @@ sunparts_open( sunparts_info_t *di )
 		RET(0);
 	}
 
-	bs = 512; // XXX get real block size?
+	bs = 512;
 	/* get partition data */
 	p = (struct sun_disklabel *)buf;