From c6fa15797141c957dff6863f3bb212966f1a27fa Mon Sep 17 00:00:00 2001
From: Leo C <erbl259-lmu@yahoo.de>
Date: Tue, 31 May 2016 12:45:58 +0200
Subject: [PATCH] Support new error codes/messages: 'Write protected', 'No
 media', 'Access beyond disk size'

---
 cbios/sdio.180 | 31 +++++++++++++++++++------------
 1 file changed, 19 insertions(+), 12 deletions(-)

diff --git a/cbios/sdio.180 b/cbios/sdio.180
index 783e681..37b7276 100644
--- a/cbios/sdio.180
+++ b/cbios/sdio.180
@@ -322,21 +322,24 @@ prompt:
 
 	call	u$conin$echo	; get operator response
 	cp	'Y'
-	jr	z,retry		; Yes, then retry 10 more times
+	jr	z,retry		; Yes, then retry once more
 
 hard$error:
 				; otherwise,
 	xor	a
 	ld	(residual),a
-
-	ld	a,1		; return hard error to BDOS
+	ld	a,(recv_msg_rc)	; return hard error to BDOS
+	ld	c,0ffh
+	cp	6		; media changed?
+	jr	z,e_exit
+	ld	c,2
+	cp	5		; disk read only?
+	jr	z,e_exit
+	dec	c
+e_exit:
+	ld	a,c
 	ret
 
-cancel:				; here to abort job
-	jp	?wboot		; leap directly to warmstart vector
-
-
-
 ; Print message to error code in A
 ;
 
@@ -426,15 +429,19 @@ read$msg:
 write$msg:
 	db	', Write, ',0
 
+    ; general driver errors
+
 drvmsg0:	db	'Unknown Error, ',0
 drvmsg1:	db	'Invalid Parameter(s), ',0
 drvmsg2:	db	'Invalid Drive, ',0
 drvmsg3:	db	'Bus Timeout, ',0
+drvmsg4:	db	'Access beyond disk size, ',0
+drvmsg5:	db	'Write protected, ',0
+drvmsg6:	db	'No media, ',0
 drvmsg_size	equ	$ - drvmsg0
-drvmsg_count	equ	3
-
+drvmsg_count	equ	7
 
-; table of pointers to error message strings
+    ; fat file system errors
 
 fr$msg0:	db	'Unknown Error,',0
 fr$msg1:	db	'DISK_ERR,',0
@@ -458,6 +465,6 @@ fr$msg18:	db	'TOO_MANY_OPEN_FILES,',0
 fr$msg19:	db	'FR_INVALID_PARAMETER,',0
 fr$msg20:	db	'short read/write,',0
 fr$msg$size	equ	$ - fr$msg0
-fr$msg$count	equ	20
+fr$msg$count	equ	21
 
 	end
-- 
2.39.2