From 09734734a10deb488f74a5ef2766a4cbf4d7e12d Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Tue, 19 Dec 1995 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1995-12-19

---
 pc/devata.c |  7 ++++++-
 pc/main.c   | 10 +++++-----
 2 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/pc/devata.c b/pc/devata.c
index 7ded22646623e7c1c89d805b764dc234cde6d61e..7021974439fcb8a9711c5baa5d32eb8a4683f0b2 100644
--- a/pc/devata.c
+++ b/pc/devata.c
@@ -1392,15 +1392,18 @@ atapart(Drive *dp)
 		 *  we still check if there is a valid partition table in
 		 *  the last sector if none is found in the second last.
 		 */
-		ataxfer(dp, &dp->p[0], Cread, dp->p[0].end-1, dp->bytes, buf);
+print("R%d|", dp->p[0].end-2);
+		ataxfer(dp, &dp->p[0], Cread, dp->p[0].end-2, dp->bytes, buf);
 		buf[dp->bytes-1] = 0;
 		n = getfields((char*)buf, line, Npart+1, "\n");
 		if(n > 0 && strncmp(line[0], PARTMAGIC, sizeof(PARTMAGIC)-1) == 0){
 			dp->p[0].end--;
 			dp->p[1].start--;
 			dp->p[1].end--;
+print("OK%d|", dp->p[1].start);
 		}
 		else{
+print("r%d|", dp->p[1].start);
 			ataxfer(dp, &dp->p[1], Cread, 0, dp->bytes, buf);
 			buf[dp->bytes-1] = 0;
 			n = getfields((char*)buf, line, Npart+1, "\n");
@@ -1408,7 +1411,9 @@ atapart(Drive *dp)
 				dp->p[0].end--;
 				dp->p[1].start--;
 				dp->p[1].end--;
+print("nok%d|", dp->p[1].start);
 			}
+else print("ok%d|", dp->p[1].start);
 		}
 	}
 	else{
diff --git a/pc/main.c b/pc/main.c
index 5559616e4a753d91caac435e9fa22e7ded59f21d..30c2d9571e6fcd46ad9846ece7afb446cb814c3e 100644
--- a/pc/main.c
+++ b/pc/main.c
@@ -338,18 +338,18 @@ romscan(void)
 			p += p[2]*512;
 			continue;
 		}
-		p[0] = 0xff;
-		p[2048-1] = 0xff;
-		if(p[0] == 0xff && p[2048-1] == 0xff)
+		p[0] = 0xCC;
+		p[2048-1] = 0xCC;
+		if(p[0] != 0xCC && p[2048-1] != 0xCC)
 			putisa(PADDR(p), 2048);
 		p += 2048;
 	}
 
 	p = (uchar*)(KZERO+0xE0000);
 	if(p[0] != 0x55 || p[1] != 0xAA){
-		p[0] = 0xff;
+		p[0] = 0xCC;
 		p[64*1024-1] = 0xff;
-		if(p[0] == 0xff && p[64*1024-1] == 0xff)
+		if(p[0] != 0xCC && p[64*1024-1] != 0xCC)
 			putisa(PADDR(p), 64*1024);
 	}
 }