--- param.h.orig	2021-01-24 11:38:14.061518336 +0100
+++ param.h	2021-01-24 13:40:43.670465262 +0100
@@ -7,7 +7,7 @@
 #define	NFILE	50		/* number of in core file structures */
 #define	NMOUNT	5		/* number of mountable file systems */
 #define	NEXEC	3		/* number of simultaneous exec's */
-#define	MAXMEM	(64*32)		/* max core per process - first # is Kw */
+#define	MAXMEM	(32*32)		/* max core per process - first # is Kw */
 #define	SSIZE	20		/* initial stack size (*64 bytes) */
 #define	SINCR	20		/* increment of stack (*64 bytes) */
 #define	NOFILE	15		/* max open files per process */
--- ken/main.c.orig	2021-01-24 11:38:46.900940245 +0100
+++ ken/main.c	2021-01-24 11:38:46.899919290 +0100
@@ -62,7 +62,7 @@
 	 */
 
 	updlock = 0;
-	printf("unix v6 11/%d\n",cputype);
+	printf("\nunix v6 11/%d\n",cputype);
 
 	UISA->r[7] = ka6[1]; /* io segment */
 	UISD->r[7] = 077406;
@@ -72,7 +72,7 @@
 	UISA->r[0] = *ka6 + USIZE;
 	UISD->r[0] = 077406;
 	for(; fuibyte(0) >= 0; UISA->r[0]++) {
-		if(UISA->r[0] == 07600)
+		if(UISA->r[0] == 0177600)
 			break;
 		clearseg(UISA->r[0]);
 		if(testmem(UISA->r[0]))
@@ -90,9 +90,9 @@
 				break;
 			}
 	}
-	printf("mem = %l KW", m*5/160);
+	printf("mem = %l KW", m/32);
 	maxmem = min(maxmem, MAXMEM);
-	printf(" max = %l\n", (maxmem-USIZE)*5/160);
+	printf(" max = %l\n", (maxmem-USIZE)/32);
 	mfree(swapmap, nswap, swplo);
 
 	startclk();
--- ken/prf.c.orig	2021-01-24 11:38:46.903983320 +0100
+++ ken/prf.c	2021-01-24 11:38:46.902939361 +0100
@@ -110,11 +110,8 @@
 	s = p->xsr;
 	p->xsr = 0;
 	p->xbr = rc;
-	if(rc == '\n') {
+	if(rc == '\n')
 		putchar('\r');
-		putchar(0177);
-		putchar(0177);
-	}
 	putchar(0);
 	p->xsr = s;
 }
@@ -150,10 +147,21 @@
 	for (i=0; p = devnames[i]; ++i)
 		if (i == dev.d_major)
 			break;
-	if (p == 0)
-		printf("%s on dev %l/%l\n", str, dev.d_major, dev.d_minor);
-	else
-		printf("%s on /dev/%s%l\n", str, p, dev.d_minor);
+	printf("%s on ", str);
+	if (p == 0) {
+		printf("dev %l/%l\n", dev.d_major, dev.d_minor);
+	} else {
+		printf("/dev/%s", p);
+		if ((p[0] == 'r' && p[1] == 'a' && p[2] == 0) ||
+		    (p[0] == 'r' && p[1] == 'r' && p[2] == 'a' && p[3] == 0)) {
+			printf("%l", dev.d_minor >> 3);
+			putchar('a' + (dev.d_minor & 7));
+		} else {
+	  		printf("%l", dev.d_minor);
+		}
+	}
+	putchar('\n');
+	putchar('\r');
 }
 
 /*
--- conf/l.s.orig	2021-01-24 11:38:38.015264960 +0100
+++ conf/l.s	2021-01-24 11:38:38.014261581 +0100
@@ -49,6 +49,11 @@
 	xyou; br5		/ xy plotter (120)
 .endif
 
+.if ra
+. = 154^.
+	raint; br5
+.endif
+
 .if rl
 . = 160^.
 	rlint; br5
@@ -305,3 +310,8 @@
 adin:	jsr	r0,call; _adrint
 aderr:	jsr	r0,call; _aderr
 .endif
+
+.if ra
+.globl _raintr
+raint:	jsr	r0,call; _raintr
+.endif
--- conf/f23.s.orig	2021-01-24 11:38:38.013256413 +0100
+++ conf/f23.s	2021-01-24 11:38:38.012198760 +0100
@@ -849,6 +849,7 @@
 / get a sp and start segmentation
 
 	mov	$_u+[usize*64.],sp
+	mov	$EN22BIT,SSR3		/ allow > 256KB
 	inc	SSR0
 
 / clear bss
@@ -936,6 +937,8 @@
 PS	= 177776
 SSR0	= 177572
 SSR2	= 177576
+SSR3	= 172516
+EN22BIT	= 20
 KISA0	= 172340
 KISA6	= 172354
 KISD0	= 172300
@@ -944,7 +947,7 @@
 UISA1	= 177642
 UISD0	= 177600
 UISD1	= 177602
-IO	= 7600
+IO	= 177600
 
 .data
 .globl	_ka6, _cputype