diff --git a/libr/core/cmd_anal.c b/libr/core/cmd_anal.c
index a64a7db263..be97f3759c 100644
--- a/libr/core/cmd_anal.c
+++ b/libr/core/cmd_anal.c
@@ -2762,6 +2762,7 @@ static void __anal_reg_list(RCore *core, int type, int bits, char mode) {
 	} else if (!bits) {
 		bits = core->anal->bits;
 	}
+	int mode2 = mode;
 	if (core->anal) {
 		core->dbg->reg = core->anal->reg;
 		if (core->anal->cur && core->anal->cur->arch) {
@@ -2771,10 +2772,16 @@ static void __anal_reg_list(RCore *core, int type, int bits, char mode) {
 			}
 			/* workaround for 6502 */
 			if (!strcmp (core->anal->cur->arch, "6502") && bits == 8) {
-				r_debug_reg_list (core->dbg, R_REG_TYPE_GPR, 16, mode, use_color); // XXX detect which one is current usage
+				mode2 = mode == 'j' ? 'J' : mode;
+				r_cons_printf ("{");
+				r_debug_reg_list (core->dbg, R_REG_TYPE_GPR, 16, mode2, use_color); // XXX detect which one is current usage
+				r_cons_printf (",");
 			}
 			if (!strcmp (core->anal->cur->arch, "avr") && bits == 8) {
-				r_debug_reg_list (core->dbg, R_REG_TYPE_GPR, 16, mode, use_color); // XXX detect which one is current usage
+				mode2 = mode == 'j' ? 'J' : mode;
+				r_cons_printf ("{");
+				r_debug_reg_list (core->dbg, R_REG_TYPE_GPR, 16, mode2, use_color); // XXX detect which one is current usage
+				r_cons_printf (",");
 			}
 		}
 	}
@@ -2790,8 +2797,12 @@ static void __anal_reg_list(RCore *core, int type, int bits, char mode) {
 			r_debug_reg_list (core->dbg, R_REG_TYPE_GPR, pcbits, 2, use_color); // XXX detect which one is current usage
 		}
 	}
-	r_debug_reg_list (core->dbg, type, bits, mode, use_color);
+	r_debug_reg_list (core->dbg, type, bits, mode2, use_color);
+	if (mode2 == 'J') {
+		r_cons_printf ("}");
+	}
 	core->dbg->reg = hack;
+	r_cons_newline ();
 }
 
 // XXX dup from drp :OOO
diff --git a/libr/debug/dreg.c b/libr/debug/dreg.c
index c435ae4669..bf13df3bc5 100644
--- a/libr/debug/dreg.c
+++ b/libr/debug/dreg.c
@@ -175,7 +175,7 @@ R_API int r_debug_reg_list(RDebug *dbg, int type, int size, int rad, const char
 				diff = r_reg_get_value (dbg->reg, item);
 				r_reg_arena_swap (dbg->reg, false);
 				delta = value-diff;
-				if (rad == 'j') {
+				if (tolower (rad) == 'j') {
 					snprintf (strvalue, sizeof (strvalue),"%"PFMT64d, value);
 				} else {
 					snprintf (strvalue, sizeof (strvalue),"0x%08"PFMT64x, value);
@@ -200,6 +200,7 @@ R_API int r_debug_reg_list(RDebug *dbg, int type, int size, int rad, const char
 			itmidx++;
 
 			switch (rad) {
+			case 'J':
 			case 'j':
 				dbg->cb_printf ("%s\"%s\":%s",
 					n?",":"", item->name, strvalue);
@@ -278,6 +279,8 @@ R_API int r_debug_reg_list(RDebug *dbg, int type, int size, int rad, const char
 beach:
 	if (rad == 'j') {
 		dbg->cb_printf ("}\n");
+	} else if (rad == 'J') {
+		// do nothing
 	} else if (n > 0 && rad == 2 && ((n%cols))) {
 		dbg->cb_printf ("\n");
 	}