diff --git a/libr/core/bin.c b/libr/core/bin.c
index 84ad87034d..cbbd44268b 100644
--- a/libr/core/bin.c
+++ b/libr/core/bin.c
@@ -600,7 +600,8 @@ static int bin_sections (RCore *r, int mode, ut64 baddr, int va, ut64 at, const
 				int bits = section->bits;
 				if (!arch) arch = info->arch;
 				if (!bits) bits = info->bits;
-				r_io_section_set_archbits (r->io, section->offset, arch, bits);
+				r_io_section_set_archbits (r->io,
+					baddr+section->rva, arch, bits);
 			}
 			snprintf (str, R_FLAG_NAME_SIZE, "[%i] va=0x%08"PFMT64x" pa=0x%08"PFMT64x" sz=%"
 					PFMT64d" vsz=%"PFMT64d" rwx=%c%c%c%c %s",
@@ -650,7 +651,7 @@ static int bin_sections (RCore *r, int mode, ut64 baddr, int va, ut64 at, const
 						if (!bits) bits = info->bits;
 						r_cons_printf ("Sa %s %d @ 0x%08"
 							PFMT64x"\n", arch, bits,
-							section->offset);
+							baddr+section->rva);
 					}
 					r_cons_printf ("f section.%s %"PFMT64d" 0x%08"PFMT64x"\n",
 							section->name, section->size, va?baddr+section->rva:section->offset);
@@ -664,14 +665,24 @@ static int bin_sections (RCore *r, int mode, ut64 baddr, int va, ut64 at, const
 							R_BIN_SCN_WRITABLE (section->srwx)?'w':'-',
 							R_BIN_SCN_EXECUTABLE (section->srwx)?'x':'-',
 							section->name,va?baddr+section->rva:section->offset);
-				} else r_cons_printf ("idx=%02i addr=0x%08"PFMT64x" off=0x%08"PFMT64x" sz=%"PFMT64d" vsz=%"PFMT64d" "
-						"perm=%c%c%c%c name=%s\n",
+				} else {
+					char str[128];
+					if (section->arch || section->bits) {
+						const char *arch = section->arch;
+						int bits = section->bits;
+						if (!arch) arch = info->arch;
+						if (!bits) bits = info->bits;
+						snprintf (str, sizeof (str), "arch=%s bits=%d ", arch, bits);
+					} else str[0] = 0;
+					r_cons_printf ("idx=%02i addr=0x%08"PFMT64x" off=0x%08"PFMT64x" sz=%"PFMT64d" vsz=%"PFMT64d" "
+						"perm=%c%c%c%c %sname=%s\n",
 						i, baddr+section->rva, section->offset, section->size, section->vsize,
 						R_BIN_SCN_SHAREABLE (section->srwx)?'s':'-',
 						R_BIN_SCN_READABLE (section->srwx)?'r':'-',
 						R_BIN_SCN_WRITABLE (section->srwx)?'w':'-',
-				R_BIN_SCN_EXECUTABLE (section->srwx)?'x':'-',
-				section->name);
+						R_BIN_SCN_EXECUTABLE (section->srwx)?'x':'-',
+						str, section->name);
+				}
 			}
 			i++;
 		}
diff --git a/libr/core/core.c b/libr/core/core.c
index 87e71dd4fc..99d1d0f973 100644
--- a/libr/core/core.c
+++ b/libr/core/core.c
@@ -682,28 +682,6 @@ R_API int r_core_seek_align(RCore *core, ut64 align, int times) {
 	return r_core_seek (core, seek+diff, 1);
 }
 
-R_API int r_core_seek_delta(RCore *core, st64 addr) {
-	ut64 tmp = core->offset;
-	int ret;
-	if (addr == 0)
-		return R_TRUE;
-	if (addr>0LL) {
-		/* check end of file */
-		if (0) addr = 0; // XXX tmp+addr>) {
-		else addr += tmp;
-	} else {
-		/* check < 0 */
-		if (-addr > tmp) addr = 0;
-		else addr += tmp;
-	}
-	core->offset = addr;
-	ret = r_core_block_read (core, 0);
-	//if (ret == -1)
-	//	memset (core->block, 0xff, core->blocksize);
-	//	core->offset = tmp;
-	return ret;
-}
-
 R_API char *r_core_op_str(RCore *core, ut64 addr) {
 	RAsmOp op;
 	ut8 buf[64];
diff --git a/libr/core/disasm.c b/libr/core/disasm.c
index 3ac3588fc3..880211073d 100644
--- a/libr/core/disasm.c
+++ b/libr/core/disasm.c
@@ -208,6 +208,7 @@ toro:
 	for (i=idx=ret=0; idx < len && lines < l; idx+=oplen,i++, lines++) {
 		ut64 at = addr + idx;
 
+		r_core_seek_archbits (core, at); // slow but safe
 		hint = r_core_hint_begin (core, hint, at);
 		if (cbytes && idx>=l)
 			break;
diff --git a/libr/core/io.c b/libr/core/io.c
index 44325f5afa..9de7574419 100644
--- a/libr/core/io.c
+++ b/libr/core/io.c
@@ -88,6 +88,27 @@ beach:
 	return ret;
 }
 
+R_API int r_core_seek_archbits (RCore *core, ut64 addr) {
+	static char *oldarch = NULL;
+	static int oldbits;
+	int bits = 0;// = core->io->section->bits;
+	const char *arch = r_io_section_get_archbits (core->io, core->offset, &bits);
+	if (arch && bits) {
+		oldarch = strdup (r_config_get (core->config, "asm.arch"));
+		oldbits = r_config_get_i (core->config, "asm.bits");
+		r_config_set (core->config, "asm.arch", arch);
+		r_config_set_i (core->config, "asm.bits", bits);
+		return 1;
+	}
+	if (oldarch) {
+		r_config_set (core->config, "asm.arch", oldarch);
+		r_config_set_i (core->config, "asm.bits", oldbits);
+		free (oldarch);
+		oldarch = NULL;
+	}
+	return 0;
+}
+
 R_API boolt r_core_seek(RCore *core, ut64 addr, boolt rb) {
 	RIOSection *newsection;
 	ut64 old = core->offset;
@@ -110,7 +131,7 @@ R_API boolt r_core_seek(RCore *core, ut64 addr, boolt rb) {
 		//core->offset = addr;
 		if (!core->io->va)
 			return R_FALSE;
-		memset (core->block, 0xff, core->blocksize);
+		//memset (core->block, 0xff, core->blocksize);
 	} else core->offset = addr;
 	if (rb) {
 		ret = r_core_block_read (core, 0);
@@ -128,17 +149,35 @@ R_API boolt r_core_seek(RCore *core, ut64 addr, boolt rb) {
 		}
 	}
 	if (core->section != newsection) {//&& core->io->section->arch) {
-		int bits = 0;// = core->io->section->bits;
-		const char *arch = r_io_section_get_archbits (core->io, core->offset, &bits);
-		if (arch && bits) {
-			r_config_set (core->config, "asm.arch", arch);
-			r_config_set_i (core->config, "asm.bits", bits);
-		}
+		r_core_seek_archbits (core, core->offset);
 		core->section = core->io->section;
 	}
 	return (ret==-1)? R_FALSE: R_TRUE;
 }
 
+R_API int r_core_seek_delta(RCore *core, st64 addr) {
+	ut64 tmp = core->offset;
+	int ret;
+	if (addr == 0)
+		return R_TRUE;
+	if (addr>0LL) {
+		/* check end of file */
+		if (0) addr = 0;
+		else addr += tmp;
+	} else {
+		/* check < 0 */
+		if (-addr > tmp) addr = 0;
+		else addr += tmp;
+	}
+	core->offset = addr;
+	ret = r_core_seek (core, addr, 1);
+	//ret = r_core_block_read (core, 0);
+	//if (ret == -1)
+	//	memset (core->block, 0xff, core->blocksize);
+	//	core->offset = tmp;
+	return ret;
+}
+
 R_API int r_core_write_at(RCore *core, ut64 addr, const ut8 *buf, int size) {
 	int ret;
 	if (!core->io || !core->file || size<1)
diff --git a/libr/include/r_core.h b/libr/include/r_core.h
index 802ab4d014..167d4a5530 100644
--- a/libr/include/r_core.h
+++ b/libr/include/r_core.h
@@ -174,6 +174,7 @@ R_API boolt r_core_seek(RCore *core, ut64 addr, boolt rb);
 R_API void r_core_seek_previous (RCore *core, const char *type);
 R_API void r_core_seek_next (RCore *core, const char *type);
 R_API int r_core_seek_align(RCore *core, ut64 align, int count);
+R_API int r_core_seek_archbits (RCore *core, ut64 addr);
 R_API int r_core_block_read(RCore *core, int next);
 R_API int r_core_block_size(RCore *core, int bsize);
 R_API int r_core_read_at(RCore *core, ut64 addr, ut8 *buf, int size);