diff --git a/scans/Makefile b/scans/Makefile
index 2d84114..8d6b259 100644
--- a/scans/Makefile
+++ b/scans/Makefile
@@ -1,4 +1,4 @@
-AS7=../tools/as7 -d
+AS7=../tools/as7
 
 system:
-	$(AS7) s?.s > output
+	$(AS7) s?.s sop.s > output
diff --git a/scans/Readme b/scans/Readme
index 8915dc2..fbf09a3 100644
--- a/scans/Readme
+++ b/scans/Readme
@@ -6,16 +6,19 @@ For modified versions of these files, look in src/cmds and src/sys.
 
 Details of the files:
 
-s1.s: pages 2-5    of 01-s1.pdf, incomplete
-s2.s: pages 7-
-s3.s: pages 14-
-s4.s: pages 21-
-s5.s: pages 28-
-s6.s: pages 34-
-s7.s: pages ??? of ???
-s8.s: pages ??? of ???
-s9.s: pages ??? of ???
-sx.s: temp symbol defns (pages ??? of s1.s)
+s1.s: pages 2-5    of 01-s1.pdf
+s2.s: pages 7-12   of 01-s1.pdf
+s3.s: pages 14-19  of 01-s1.pdf
+s4.s: pages 21-26  of 01-s1.pdf
+s5.s: pages 28-32  of 01-s1.pdf
+s6.s: pages 34-38  of 01-s1.pdf
+s7.s: pages 41-46  of 01-s1.pdf
+s8.s: pages 48-51  of 01-s1.pdf
+s9.s: pages 53-54  of 01-s1.pdf
+sop.s pages 62-63  of 01-s1.pdf
+sx.s: temp additional symbol defns
+maksys.s: page 64  of 01-s1.pdf
+trysys.s: page 65  of 01-s1.pdf
 
 bc.s:  pages 7-11  of 06-5-12.pdf
 bi.s:  pages 12-19 of 06-5-12.pdf
diff --git a/scans/maksys.s b/scans/maksys.s
new file mode 100644
index 0000000..e04585a
--- /dev/null
+++ b/scans/maksys.s
@@ -0,0 +1,52 @@
+"** 01-s1.pdf page 64 -- handwritten maksys
+" copy a.out to disk track 18x
+" where x is the argument
+
+   lac 017777 i; sad d8; skp; jmp error
+   lac 017777; tad d5; dac track
+   lac i track; lrss 9; tad om60
+   spa; jmp error; dac track
+   tad dm10; sma; jmp error
+
+   sysopen; a.out; 0
+   spa; jmp error
+   sys read; bufp; buf; 3072
+   sad .-1
+   jmp error
+
+   dscs
+   -3072; dslw
+   lac bufp; dslm
+   lac track; alss 8; xor o300000; dsld
+   lac o30000; dsls
+   dssf; jmp .-1
+   dsrs; spa; jmp error
+   -1024; dslw
+   lac d3072; dslm
+   lac track; alss 8; xor o300110; dsld
+   lac o3000; dsls
+   dssf; jmp .-1
+   dsrs; spa; jmp error
+   sys exit
+
+error:
+   lac d1; sys write; 1f; 2
+   sys exit
+1: 077077;012
+
+dm10: -10
+dm5: 5
+om60: -060
+o300000: 0300000
+o300100: 0300110
+d8: 8
+d3072: 3072
+o3000: 03000
+d1: 1
+a.out:
+   <a.>;<ou>;<t 040;040040
+
+track: .=.+1
+
+buf:
+
diff --git a/scans/s2.s b/scans/s2.s
index 5c51afc..3847776 100644
--- a/scans/s2.s
+++ b/scans/s2.s
@@ -98,12 +98,12 @@
    jms arg
    dac 2f
    lac d4
-   jms namei; 0; 0
+   jms namei; 0:0
       jms error
-   jms namei; 1; 0
+   jms namei; 1:0
       jms error
    dac u.base
-   jms copy; 2; 0; name; 4
+   jms copy; 2:0; name; 4
    lac u.cdir
    jms namei; name
       skp
@@ -160,12 +160,12 @@
    jms arg
    dac 1f
    lac u.cdir
-   jms namei; 0;0
+   jms namei; 0:0
       jms error
    lac d1
    dac mode
    jms access
-   jms copy; 1; 0; d.name; 4
+   jms copy; 1:0; d.name; 4
    jmp okexit
 
 .time:
@@ -197,7 +197,7 @@
    lac d2
    dac mode
    lac u.cdir
-   jms namei; 0; 0
+   jms namei; 0:0
       jms error
    jms iget
    jms access
diff --git a/scans/s3.s b/scans/s3.s
index 6ca7b28..742c0a3 100644
--- a/scans/s3.s
+++ b/scans/s3.s
@@ -51,8 +51,8 @@ lookfor: 0
    law sysexit
    dac u.swapret
    lac o200000
-   tad u.listp i
-   dac u.listp i
+   tad u.ulistp i
+   dac u.ulistp i
    jms dskswap; 07000
    lac 9f+t
    dac u.ulistp
@@ -138,7 +138,7 @@ t = t+1
    sad u.ac
    skp
    jmp 1b i
-   lac 1u+2
+   lac lu+2
    sad dm1
    jmp 1f
    lac o100000
@@ -158,7 +158,7 @@ t = t+1
 1:
    -3
    tad 8
-   dac 0f+t
+   dac 9f+t
    lac o700000
    tad 9f+t i
    dac 9f+t i
@@ -281,7 +281,7 @@ rkbdi:
 3:
    jms sleep; sfiles+2
    jms swap
-   jmp rkdbi
+   jmp rkbdi
 
 wdspo:
    jms chkint1
diff --git a/scans/s4.s b/scans/s4.s
index c4cdfbf..e1e406f 100644
--- a/scans/s4.s
+++ b/scans/s4.s
@@ -55,7 +55,7 @@ free: 0
 t = t+1
 
 laci: 0
-   and o1777
+   and o17777
    tad o200000
    dac .+1
    lac ..
@@ -144,7 +144,7 @@ getchar: 0
    tad o200001
    dac .+3
    cla
-   jms putc
+   jms putq
    lac q2+1 ..
    isz getchar
    jmp i getchar
@@ -155,7 +155,7 @@ takeq: 0
    dac .+7
    tad o640000
    dac .+17
-   dad s1
+   tad d1
    dac .+14
    tad o500000
    dac .+5
@@ -234,7 +234,7 @@ collapse: 0
    sna
    jmp 0f+3
    dac 0f+2
-   jms copy; 0; ..; ..; ..
+   jms copy; 0:..; ..; ..
    -65
    tad edskbsp
    dac 9f+t
@@ -242,7 +242,7 @@ collapse: 0
    dac 0f
    lac dskaddr
    dac 9f+t i
-   jms copy; dskbuf; 0; ..; 64
+   jms copy; dskbuf; 0:..; 64
    jmp collapse i
 
 dskrd: 0
@@ -265,7 +265,7 @@ dskrd: 0
    dac .+2
    jms copy; ..; dskbuf; 64
 2:
-   jms collaps
+   jms collapse
    jmp dskrd i
 
 dskwr: 0
diff --git a/scans/s5.s b/scans/s5.s
index 0d20930..8f12620 100644
--- a/scans/s5.s
+++ b/scans/s5.s
@@ -89,6 +89,11 @@ forall: 0
    lrs 9
    and o777
    jmp forall i
+failr:
+   lac u.base
+   add o400000
+   dac u.base
+   jmp forall+1
 1:
    lac u.count
    dac u.ac
@@ -207,7 +212,7 @@ dspnl: 0
    jmp dspnl i
 1:
    lac o2000
-   wbi			"** ??
+   wbl
    isz dspput
    jmp dspput i
 
diff --git a/scans/s7.s b/scans/s7.s
index 42d841e..6d12062 100644
--- a/scans/s7.s
+++ b/scans/s7.s
@@ -3,15 +3,16 @@
 
 pibreak:
    dac .ac	"** CROSSED OUT....
-   lpsf
+
+   dpsf
    jmp 1f
 
-   lpcf
-   dprs		"** ??
+   dpcf
+   dprs
    dac dpstat
    sma ral
    jmp 2f
-   dprc		"** ??
+   dprc
    dac dpchar
    -1
    dac dpread
@@ -71,11 +72,7 @@ cnop:
    jmp piret
 
 1: lds		"** BEGIN CROSSED OUT
-   sma ra1
-   jmp 1f
-   cdf
-   lac .dspb
-   sna
+   sma ral
    jmp 1f
    cdf
    lac .dspb
@@ -86,8 +83,16 @@ cnop:
    jmp dsprestart
    dac .dspb
    jmp piret
+dsprestart:
+   lac d1
+   dac .dspb
+   lac dspbufp
+   beg		"** ???
+   -10
+   dac .dsptm
+   jmp piret
 
-1: sna ra1
+1: sna ral
    jmp .+3
    racf
    jmp piret
@@ -125,7 +130,7 @@ cnop:
 
 "** 01-s1.pdf page 43
 
-   jms ptcr
+   jms putcr
    jms ttyrestart
    jmp piret
 
@@ -261,7 +266,7 @@ ttyrestart: 0
    jms wakeup
    dac sfiles+6
    cla
-   wbi
+   wbl
    jmp piret	"** END CROSSED OUT
 
 1: crsf
@@ -277,7 +282,7 @@ ttyrestart: 0
 
 piret:
    lac 0
-   rai
+   ral
    lac .ac
    ion
    jmp 0 i
@@ -292,7 +297,7 @@ wakeup: 0
    dac 2f+1
 1:
    lac 9f+t
-   rao
+   ral
    dac 9f+t
    sma
    jmp 2f+2
diff --git a/scans/s8.s b/scans/s8.s
index e70e643..88ad5f4 100644
--- a/scans/s8.s
+++ b/scans/s8.s
@@ -4,7 +4,7 @@
 
 " manifests
 mnproc = 10
-dspbss = 270
+dspbsz = 270
 ndskbs = 4
 
 " flags
@@ -24,7 +24,7 @@ maxquant: 30
 ofilesp: u.ofiles
 idskpp: i.dskps
 dskbufp: dskbuf
-edspbuf: dspbuf+dspbzs
+edspbuf: dspbuf+dspbsz
 fblksp: s.fblks
 dacq1: dac q1
 lacq1: lac q1
@@ -113,7 +113,7 @@ coldentry:
    ion
    clon
    law 3072
-   vcga
+   wcga
    jms dspinit
    law dspbuf
    jms movdsp
@@ -142,6 +142,7 @@ ttydelay: .=.+1
 name: .=.+4
 lnkaddr: .=.+1
 char: .=.+1
+dskaddr: .=.+1
 uniqpid: 1
 lu: .=.+4
 sfiles: .=.+10
@@ -180,7 +181,7 @@ userdata:
    u.uid: -1
    u.pid: 1
    u.cdir: 3
-   u.ulistp: clist
+   u.ulistp: ulist
    u.swapret: 0
    u.base: 0
    u.count: 0
@@ -200,6 +201,7 @@ inode:
    i.uniq: .=.+1
       .= inode+12
 di: .=.+1
+dnode:
    d.i: .=.+1
    d.name: .=.+4
    d.uniq: .=.+1
diff --git a/scans/s9.s b/scans/s9.s
index 77004b2..b308170 100644
--- a/scans/s9.s
+++ b/scans/s9.s
@@ -1,4 +1,4 @@
-"** 01-s1.pdf page 54
+"** 01-s1.pdf page 53
 " s9 -- cold boot
 
 . = coldentry+4
@@ -8,7 +8,7 @@
    dzm ii
    jms copyz; dskbuf; 64
 1:
-   iac ii
+   lac ii
    jms dskio; 0700
    isz ii
    -710
@@ -38,11 +38,11 @@
    jmp 1b " 0 count means pause
    dac xx
    isz ii
-   iac ii
+   lac ii
    jms iget
    jms copyz; inode; 12
    jms getw " flags
-   dac i.dlags
+   dac i.flags
    -1
    dac i.uid
    jms getw " number links
@@ -51,7 +51,7 @@
    tad xx
    dac i.size
    lac ii
-   dac u.uniq
+   dac i.uniq
    law 4096-1
    dac 8
    -1
@@ -65,7 +65,7 @@
 2:
    jms getw
    dac 8 i
-   iss xx
+   isz xx
    jmp 2b
 3:
    lac sum
@@ -80,7 +80,7 @@
    jms iwrite; 4096; ..
    jms iput
    cla
-   jms dksio
+   jms dskio
 
 
 
@@ -90,13 +90,13 @@
 getw: 0
    jms getc
    alss 12
-   imq
+   lmq
    jms getc
-   omg
-   lmg
+   omq
+   lmq
    jms getc
-   omg
-   lmg
+   omq
+   lmq
    add sum
    dac sum
    lacq
diff --git a/scans/sop.s b/scans/sop.s
new file mode 100644
index 0000000..22ca2a4
--- /dev/null
+++ b/scans/sop.s
@@ -0,0 +1,97 @@
+"** 01-s1.pdf page 62
+" sop
+
+dac = 0040000
+jms = 0100000
+dzm = 0140000
+lac = 0200000
+xor = 0240000
+add = 0300000
+tad = 0340000
+xct = 0400000
+isz = 0440000
+and = 0500000
+sad = 0540000
+jmp = 0600000
+nop = 0740000
+i = 020000
+law = 0760000
+cma = 0740001
+las = 0750004
+ral = 0740010
+rar = 0740020
+hlt = 0740040
+sma = 0740100
+sza = 0740200
+snl = 0740400
+skp = 0741000
+sna = 0741200
+szl = 0741400
+rtl = 0742010
+rtr = 0742020
+cil = 0744000
+rcl = 0744010
+rcr = 0744020
+cia = 0750000
+lrs = 0640500
+lrss = 0660500
+lls = 0640600
+llss = 0660600
+als = 0640700
+alss = 0660700
+mul = 0653323
+idiv = 0653323
+lacq = 0641002
+clq = 0650000
+omq = 0650002
+cmq = 0650004
+lmq = 0652000
+
+dscs = 0707141
+dslw = 0707124
+dslm = 0707142
+dsld = 0707104
+dsls = 0707144
+dssf = 0707121
+dsrs = 0707132
+
+iof = 0700002
+ion = 0700042
+caf = 0703302
+clon = 0700044
+clsf = 0700001
+
+"** 01-s1.pdf page 63
+clof = 0700004
+ksf = 0700301
+krb = 0700312
+tsf = 0700401
+tcf = 0700402
+tls = 0700406
+sck = 0704301
+cck = 0704304
+lck = 0704312
+rsf = 0700101
+rsa = 0700104
+rrb = 0700112
+psf = 0700201
+pcf = 0700202
+psa = 0700204
+cdf = 0700501
+lds = 0701052
+lda = 0701012
+wcga = 0704206
+raef = 0700742
+rlpd = 0700723
+beg = 0700547
+spb = 0704401
+cpb = 0704404
+lpb = 0704412
+wbl = 0704424
+dprs = 0704752
+dpsf = 0704741
+dpcf = 0704761
+dprc = 0704712
+crsf = 0706701
+crrb = 0706712
+
diff --git a/scans/sx.s b/scans/sx.s
index 8c16094..6b08758 100644
--- a/scans/sx.s
+++ b/scans/sx.s
@@ -1,4 +1,3 @@
-
 " For now, this stuff is defined so that
 " the assembler doesn't complain about it
 
diff --git a/scans/trysys.s b/scans/trysys.s
new file mode 100644
index 0000000..db45d59
--- /dev/null
+++ b/scans/trysys.s
@@ -0,0 +1,40 @@
+"** 01-s1.pdf page 65
+" trysys
+
+   sys open; a.out; 0
+   spa
+   jmp error
+   sys read; buf; 3072
+   sad .-1
+   jmp error
+   iof
+   caf
+   cdf
+   clof
+   law buf
+   dac t1
+   dzm t2
+   -3072
+   dac c1
+1:
+   lac t1 i
+   dac r2 i
+   isz t1
+   isz r2
+   isz c1
+   jmp 1b
+   jmp 0100
+
+error:
+   lac d1
+   sys write; 1f; 1
+   sys exit
+1: 077012
+
+a.out:
+   <a.>;<ou><t 040; 040040
+t1: 0
+t2: 0
+c1: 0
+d1: 1
+buf: