diff --git a/pidrive/pidrive.s b/pidrive/pidrive.s
index e0c51f7..e112b78 100755
--- a/pidrive/pidrive.s
+++ b/pidrive/pidrive.s
@@ -259,6 +259,15 @@ IOERR:	LDA	#PDIOERR
 CMDERR:	PLP
 	SEC
 DOCLK:	RTS			; NO OP CLOCK ROUTINE
+STATUS: JSR	RECVACC
+	TAX
+	JSR	RECVACC
+	TAY
+CMDEX:	JSR	RECVACC
+	BNE	CMDERR
+	PLP
+	CLC
+	RTS
 RDBLK:	JSR	RECVACC
 	STA	(PDBUFF),Y
 	INY
@@ -266,13 +275,7 @@ RDBLK:	JSR	RECVACC
 	INC	PDBUFH
 	DEX
 	BNE	RDBLK
-STATUS: LDX	#$FF
-        DEY			; LDY	#$FF
-CMDEX:	JSR	RECVACC
-	BNE	CMDERR
-	PLP
-	CLC
-	RTS
+	BEQ	CMDEX
 WRBLK:	LDA	(PDBUFF),Y
 	JSR	SENDACC
 	INY
@@ -300,3 +303,5 @@ RECVWT:	LDA	ACIASR
 	BEQ	RECVWT
 FIXUP4:	LDA	ACIADR
 	RTS
+	.ASSERT	* - DOCMD <= DRVRLEN, error, "Driver too big"
+	.OUT	.SPRINTF("Driver size %i", * - DOCMD)
diff --git a/pidrive/rom.s b/pidrive/rom.s
index dea8f5b..38880ff 100755
--- a/pidrive/rom.s
+++ b/pidrive/rom.s
@@ -249,18 +249,19 @@ STATUS:
 	LDA	#'S'-$40
 	STA	INDCTR+3
 .ENDIF
+	LDA	IOSLOT
+	AND	#$0F
+	TAY
 	JSR	RECVACC
-	LDX	#$FF
-	LDY	#$FF
-;	PHA
-;       JSR	RECVACC
-;	TAY
-;	PLA
-;	TAX
-;	BNE	:+
-;	CPY	#$00
-;	BEQ	NODEV
-;:	LDA	#$00
+	STA	SCRTCH6,Y
+	JSR	RECVACC
+	STA	SCRTCH7,Y
+	JSR	RECVACC
+	PHA
+	LDX	SCRTCH6,Y
+	LDA	SCRTCH7,Y
+	TAY
+	PLA
 	RTS
 ;*
 ;* READ A BLOCK (512 BYTES) FROM SIDRIVE
@@ -406,7 +407,7 @@ ENDCMD:
 	.REPEAT $C700+250-*
 	DB	$00
 	.ENDREP
-	DB	"Si"		; SIGNATURE
+	DB	"SI"		; SIGNATURE
 	DW	0		; USE STATUS TO GET SIZE
 	DB	$97		; REMOVEABLE, 2 DEVICES, R/W
 	DB	<CMDENTRY
diff --git a/src/a2pid.c b/src/a2pid.c
index 23effce..c9124ca 100755
--- a/src/a2pid.c
+++ b/src/a2pid.c
@@ -140,8 +140,18 @@ int vdrvtime(int afd)
 {
     return write(afd, prodos_time(), 4);
 }
-int vdrvstatus(int drive)
+int vdrvstat(int afd, int drive)
 {
+    struct stat vstat;
+    unsigned char size_buff[2];
+    
+    if (vdrvfd[drive])
+        fstat(vdrvfd[drive], &vstat);
+    else
+        vstat.st_size = 0;
+    size_buff[0] = vstat.st_size >> 9;
+    size_buff[1] = vstat.st_size >> 17;
+    write(afd, size_buff, 2);
     return vdrvfd[drive] == 0 ? 0x28 : 0x00;
 }
 int vdrvread(int afd, int drive, int block)
@@ -833,7 +843,7 @@ reset:
                             //printf("vdrive: STATUS unit:%d\n", (iopkt[0] >> 1) & 0x01);
                             iopkt[3] = iopkt[0] + 1; /* ack */
                             write(a2fd, &iopkt[3], 1);
-                            iopkt[0] = vdrvstatus((iopkt[0] >> 1) & 0x01);
+                            iopkt[0] = vdrvstat(a2fd, (iopkt[0] >> 1) & 0x01);
                             write(a2fd, iopkt, 1);
                             if (a2reqlist && !(a2reqlist->type & AWAIT_COMPLETE)) /* resend last request */
                             {