From 8d7aab73ae556c9ccdd34a56913d0f89f4dd1e78 Mon Sep 17 00:00:00 2001
From: Leo C <erbl259-lmu@yahoo.de>
Date: Wed, 15 Jun 2016 12:55:31 +0200
Subject: [PATCH] Reverse local stack patch for sdio/cfio

---
 cbios/cfio.180 | 17 ++---------------
 cbios/sdio.180 | 20 +-------------------
 2 files changed, 3 insertions(+), 34 deletions(-)

diff --git a/cbios/cfio.180 b/cbios/cfio.180
index fc3bea1..5dd8a2e 100644
--- a/cbios/cfio.180
+++ b/cbios/cfio.180
@@ -649,9 +649,6 @@ rw$common:
    endif
 
 rwc_new_sectors:
-	ld	(cfstack),sp
-	ld	sp,cfstack
-
 	in0	a,(dcntl)
 	and	a,~(M_DMS1+M_DIM1+M_DIM0)
 	or	b
@@ -708,8 +705,7 @@ retry:
 	pop	hl
 	jr	c,lba_ok
 	ld	a,1		; block# >= partition size, return error
-	jp	exit
-;	ret
+	ret
 
 lba_ok:
 	WAITREADY
@@ -766,8 +762,7 @@ err_out:
 	pop	bc
 	ld	e,a
 	and	10001001b	; Busy, DRQ, or Error?
-	jr	z,exit
-;	ret	z		; Return to BDOS if no error
+	ret	z		; Return to BDOS if no error
 
 	ld	hl,print_details
 	call	pr.errors
@@ -777,8 +772,6 @@ err_out:
 	ld	(residual),a
 
 	ld	a,1		; return hard error to BDOS
-exit:
-	ld	sp,(cfstack)
 	ret
 
 ;-------------------------------------------------------------------------------
@@ -831,10 +824,4 @@ parttbl:
 tmpsecbuf:		;temporary sector buffer
 	ds	512
 
-	rept	80
-	 db	07CH
-	endm
-cfstack::
-	dw	0
-
 	end
diff --git a/cbios/sdio.180 b/cbios/sdio.180
index d934ef4..28ed4dd 100644
--- a/cbios/sdio.180
+++ b/cbios/sdio.180
@@ -164,9 +164,6 @@ sd$init7:
 ;     relative drive number in @rdrv (8 bits)	+1
 
 sd$login:
-	ld	(sdstack),sp
-	ld	sp,sdstack
-
 	xor	a
 	ld	(residual),a
 	ld	hl,send_msg+1
@@ -198,9 +195,6 @@ sd$login:
 
 	ld	a,(recv_msg_rc)
 	or	a
-
-	ld	sp,(sdstack)
-
 	ret	z
 	ld	hl,0
 	ld	(@xdph),hl
@@ -236,9 +230,6 @@ sd$write:
 	ret
 
 rwc_new_sectors:
-	ld	(sdstack),sp
-	ld	sp,sdstack
-
 	ld	b,1		; assume 1 sector to transfer
 	ld	a,(@cnt)
 	or	a
@@ -289,8 +280,7 @@ retry:
 	call	msg.recv
 	ld	a,(recv_msg_rc)
 	or	a
-;	ret	z		; check status and return to BDOS if no error
-	jr	z,exit
+	ret	z		; check status and return to BDOS if no error
 
 	ld	hl,print_details
 	call	pr.errors
@@ -308,8 +298,6 @@ retry:
 	dec	c
 e_exit:
 	ld	a,c
-exit:
-	ld	sp,(sdstack)
 	ret
 
 ;-------------------------------------------------------------------------------
@@ -403,10 +391,4 @@ fr$msg19:	db	'FR_INVALID_PARAMETER,',0
 fr$msg20:	db	'short read/write,',0
 		db	0
 
-	rept	80
-	 db	07CH
-	endm
-sdstack::
-	dw	0
-
 	end
-- 
2.39.2