diff --git a/c64/aliases/,aliases_config.s b/c64/aliases/,aliases_config.s
index 4524efdf..619223aa 100644
--- a/c64/aliases/,aliases_config.s
+++ b/c64/aliases/,aliases_config.s
@@ -317,7 +317,7 @@
 #if !CONFIG_IEC_JIFFYDOS
 	.eval features_str = ADD_FEATURE(features_str, "IEC")
 #else
-	.eval features_str = ADD_FEATURE(features_str, "IEC+JIFFY DEF")
+	.eval features_str = ADD_FEATURE(features_str, "IEC+JIFFY DEV")
 #endif
 #endif
 
diff --git a/c64/kernal/iec/f000.iec_jiffydos.s b/c64/kernal/iec/f000.iec_jiffydos.s
index bc238d4f..aeab1fd3 100644
--- a/c64/kernal/iec/f000.iec_jiffydos.s
+++ b/c64/kernal/iec/f000.iec_jiffydos.s
@@ -78,7 +78,7 @@ __jd_check1:
 	and #%00110000                     // clear everything but CLK/DATA
 	sta CIA2_PRA
 
-	// Signal EOI if needed     XXX calculate cycles for quicklyy pulling CLK
+	// Signal EOI if needed     XXX calculate cycles for quickly pulling CLK
 	lda C3PO
 	ldx IECPROTO
 	beq iec_tx_byte_jiffydos_wait_eoi
diff --git a/c64/kernal/iec/iec_tx_byte.s b/c64/kernal/iec/iec_tx_byte.s
index 15b5d01c..40259cbb 100644
--- a/c64/kernal/iec/iec_tx_byte.s
+++ b/c64/kernal/iec/iec_tx_byte.s
@@ -78,9 +78,10 @@ iec_jiffydos_detect_loop:
 	bne iec_jiffydos_detect_loop       // 3 cycles if branch
 
 	lda #$00                           // normal protocol
-	skip_2_bytes_trash_nvz
+	beq iec_jiffydos_store_proto       // branch always
 
 iec_jiffydos_detected:
+	jsr iec_wait_for_data_release      // guessed from VICE logs
 	lda #$01                           // JiffyDOS protocol
 
 iec_jiffydos_store_proto:
@@ -118,7 +119,7 @@ iec_tx_common_bit_is_sent:
 
 	cli
 
-	// Give device time to tell if they are busy by pulling DATA
+	// Give devices time to tell if they are busy by pulling DATA
 	// They should do it within 1ms
 	ldx #$FF
 !: