dual fdd startup banner fix

src/basic/basic_commands_04/cmd_sysinfo.s

@@ -119,17 +119,23 @@ print_sysinfo_video:
 	ldx #IDX__STR_DOS_FD
 	jsr print_packed_misc_str
 
-	; Print floppy unit ID
+	; Print floppy unit IDs
 
 	lda #$01
 	jsr cmd_sysinfo_print_dev
 
+	lda #'/'
+	jsr JCHROUT
+
+	lda #$02
+	jsr cmd_sysinfo_print_dev
+
 	; Print ram disk unit ID
 
 	ldx #IDX__STR_DOS_RD
 	jsr print_packed_misc_str
 
-	lda #$02
+	lda #$03
 	jsr cmd_sysinfo_print_dev
 
 	jmp print_return