added salv to image

build/Makefile

@@ -97,7 +97,7 @@ cmd: dirs $(BINDIR)/as $(BINDIR)/cat $(BINDIR)/check $(BINDIR)/chmod \
 	$(BINDIR)/dskres $(BINDIR)/dsksav $(BINDIR)/ed $(BINDIR)/init \
 	$(BINDIR)/db $(BINDIR)/stat $(BINDIR)/tm $(BINDIR)/dsw $(BINDIR)/apr \
 	$(BINDIR)/cas $(BINDIR)/rm $(BINDIR)/rn $(BINDIR)/pd $(BINDIR)/nm \
-	$(BINDIR)/roff $(BINDIR)/p $(BINDIR)/apr
+	$(BINDIR)/roff $(BINDIR)/p $(BINDIR)/apr $(BINDIR)/salv
 
 # Alternate commands: no dd, but . and ..
 altcmd: dirs $(BINDIR)/as $(BINDIR)/cat $(BINDIR)/check $(BINDIR)/chmod \
@@ -197,6 +197,9 @@ $(BINDIR)/roff: $(CMDSRC)/roff.s
 $(BINDIR)/p: $(CMDSRC)/p0.s $(CMDSRC)/p1.s $(CMDSRC)/p2.s $(CMDSRC)/p3.s $(CMDSRC)/p4.s $(CMDSRC)/p5.s
 	$(AS) $(ASARGS) -o $(BINDIR)/p $(CMDSRC)/p0.s $(CMDSRC)/p1.s $(CMDSRC)/p2.s $(CMDSRC)/p3.s $(CMDSRC)/p4.s $(CMDSRC)/p5.s
 
+$(BINDIR)/salv: $(CMDSRC)/salv.s
+	$(AS) $(ASARGS) -o $(BINDIR)/salv $(CMDSRC)/salv.s
+
 # Alternative init: no dd directory
 $(BINDIR)/altinit: $(ALTSRC)/init.s
 	$(AS) $(ASARGS) -o $(BINDIR)/altinit $(ALTSRC)/init.s

build/proto

@@ -51,6 +51,7 @@ dd           drwr- -1 4
         roff     frwr- -1 bin/roff
         rn       frwr- -1 bin/rn
         rm       frwr- -1 bin/rm
+        salv     frwr- -1 bin/salv
         sh       frwr- -1 bin/sh
         stat     frwr- -1 bin/stat
         tm       frwr- -1 bin/tm

src/cmd/salv.s

@@ -0,0 +1,298 @@
+" ** 11-45-91.pdf page 25
+" salv
+
+   lac d1
+   sys sysloc
+   dac iget
+
+   lac d2
+   sys sysloc
+   dac inode
+
+   lac d4
+   sys sysloc
+   dac nxfblk
+   tad d1
+   dac nfblks
+   tad d1
+   dac fblks
+
+   lac d5
+   sys sysloc
+   dac copy
+
+   lac d6
+   sys sysloc
+   dac copyz
+
+   lac d7
+   sys sysloc
+   dac betwen
+
+   lac d8
+   sys sysloc
+   dac dskrd
+
+   lac d10
+   sys sysloc
+   dac dskbuf
+
+   lac d15
+   sys sysloc
+   dac free
+
+      dzm indircnt
+      dzm icnt
+      dzm licnt
+      dzm blcnt
+      dzm curi
+      jms copyz i; usetab; 500
+
+iloop:
+   isz curi
+   -3400
+   tad curi
+   sma
+   jmp part2
+   lac curi
+   jms iget i
+   jms copy i; inode: 0; linode; 12
+   lac iflags
+   sma
+   jmp iloop
+   isz icnt
+
+" ** 11-45-91.pdf page 26
+
+   lac iflags
+   and 040
+   sza
+   jmp iloop
+   law idskps
+   dac t1
+   -7
+   dac t2
+1:
+   lac i t1
+   sza
+   jms dupcheck
+   isz t1
+   isz t2
+   jmp 1b
+   lac iflags
+   and o200000
+   sna
+   jmp iloop
+
+   isz licnt
+   law idskps
+   dac t1
+   -7
+   dac t2
+1:
+   lac i t1
+   sna
+   jmp 3f
+   jms dskrd i
+   jms copy i; dskbuf: 0; idskbuf: 64
+   isz indircnt
+   law ldskbuf
+   dac t3
+   -64
+   dac t4
+2:
+   lac i t3
+   sza
+   jms dupcheck
+   isz t3
+   isz t4
+   jmp 2b
+3:
+   isz t1
+   isz t2
+   jmp 1b
+   jmp iloop
+
+dupcheck: 0
+   isz blcnt
+   jms betwen i; d709; d6400
+   jmp badadr
+   dac t5
+   lrss 4
+   tad usetabp
+   dac t6
+   cla
+   llss 4
+   tad alsscom
+   dac 2f
+
+" ** 11-45-91.pdf page 27
+
+      lac d1
+2: alss 0
+      dac bit
+      lac i t6
+      and bit
+      sza
+      jmp dup
+      lac i t6
+      xor bit
+      dac i t6
+      jmp i dupcheck
+
+badadr:
+      jms print
+      lac d1
+      sys write; badmes; 3
+      jmp i dupcheck
+badmes:
+      < b>;<ad>;<r 012
+
+dup:
+      lac t5
+      jms print
+      lac d1
+      sys write; dupmes; 3
+      jmp i dupcheck
+dupmes:
+      < d>;<up><a 012
+
+print: 0
+      lmq
+      law prbuf-1
+      dac 8
+      -6
+      dac t6
+1:
+      cla
+      llss 3
+      tad o60
+      dac i 8
+      isz t6
+      jmp 1b
+      lac d1
+      sys write; prbuf; 6
+      jmp i print
+
+part2:
+      lac icnt
+      jms print
+      lac d1
+      sys write; m3; m3s
+      lac licnt
+      jms print
+      lac d1
+      sys write; m4; m4s
+      lac indircnt
+      jms print
+      lac d1
+      sys write; m5; m5s
+      lac blcnt
+      jms print
+
+" ** 11-45-91.pdf page 28
+
+      lac d1
+      sys write; m6; m6s
+      dzm blcnt
+      dzm nxfblk i
+      dzm nfblks i
+
+      lac d709
+      dac t1
+1:
+      isz t1
+      lac t1
+      sad d6400
+      jmp part3
+      lrss 4
+      tad usetabp
+      dac t2
+      cla
+      lrss 4
+      tad alsscom
+      dac 2f
+      lac d1
+2: alss 0
+      dac bit
+      lac i t2
+      and bit
+      sza
+      jmp 1b
+
+
+part3:
+      lac blcnt
+      jms print
+      lac d1
+      sys write; m7; m7s
+
+d1: 1
+d2: 2
+d4: 4
+d5: 5
+d6: 6
+d7: 7
+d8: 8
+d10: 10
+d15: 15
+o60: 060
+o400000: 0400000
+o400001: 0400001
+o40: 040
+o200000: 0200000
+alsscom: alss 0
+d709: 709
+d6400: 6400
+
+m3:
+      040;<fi>;<le>;<s 012
+   m3s = .-m3
+
+m4:
+" ** 11-45-91.pdf page 29
+      040;<la>;<rg>;<e 012
+   m4s = .-m4
+m5:
+      040;<in>;<di>;<r 012
+   m5s = .-m5
+m6:
+      040;<us>;<ed>;012
+   m6s = .-m6
+m7:
+      040;<fr>;<ee>;012
+   m7s = .-m7
+m8:
+      040;<mi>;<ss>;<in>;<g 012
+   m8s = .-m8
+
+usetabp: usetab
+curi: 0
+bit: 0
+blcnt: 0
+indircnt: 0
+icnt: 0
+licnt: 0
+t1: 0
+t2: 0
+t3: 0
+t4: 0
+t5: 0
+t6: 0
+
+iget: 0
+nxfblk: 0
+nfblks: 0
+fblks: 0
+copy: 0
+copyz: 0
+betwen: 0
+dskrd: 0
+free: 0
+
+ldskbuf: .=.+64
+linode: .=.+12
+  iflags = linode
+  idskps = iflags+1
+usetab: .=.+500
+prbuf: .=.+6