shell: don't parse empty cmds

2019-07-13 15:34:43 -04:00 · 2019-07-13 15:34:43 -04:00 · 3861670bcc
commit 3861670bcc
parent 951dd2206d
1 changed files with 5 additions and 0 deletions
--- a/kernel/shell.asm
+++ b/kernel/shell.asm
@ -89,6 +89,11 @@ shellLoop:

 ; Parse command (null terminated) at HL and calls it
 shellParse:
+	; first thing: is command empty?
+	ld	a, (hl)
+	or	a
+	ret	z	; empty, nthing to do
+
 	push	af
 	push	bc
 	push	de