This is the beginnings of a alternative version of the PDP-7 Unix
system which corresponds to a later development point, around mid-1971, where the system had lost the "dd" directory and gained . and .. entries. This is close to the system as described in http://www.tuhs.org/Archive/PDP-11/Distributions/research/McIlroy_v0/UnixEditionZero.txt except there are no pathnames. To use this version: cd build; make alt; make altrun
This commit is contained in:
Warren Toomey
+41
-2
@@ -22,16 +22,29 @@ BINARIES=../binaries/
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all: cmd others a.rim image.fs copybinaries
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# Make alternative everything: no dd but . and ..
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alt: altcmd altothers alta.rim altimage.fs
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# The run rule has no dependencies so that the system can be booted easily
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# and frequently with make run. However, you have to manually make all first!
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run:
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$(PDP7) unixv0.simh
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# Alternative run, use the altimage.fs
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altrun:
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$(PDP7) altunixv0.simh
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# Warm boot Unix kernel: boots into init and a login prompt
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a.rim:
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$(AS) -f rim -o a.rim $(SYSSRC)/sop.s $(SYSSRC)/s[1-8].s
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$(AS) -n -f list -o a.lst $(SYSSRC)/sop.s $(SYSSRC)/s[1-8].s
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# Alternative kernel: no dd, but . and ..
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alta.rim:
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$(AS) -f rim -o alta.rim -DNO_DD $(SYSSRC)/sop.s $(SYSSRC)/s[1-8].s
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$(AS) -n -f list -o alta.lst -DNO_DD $(SYSSRC)/sop.s $(SYSSRC)/s[1-8].s
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# Cold boot Unix kernel: attempts to build a minimal filesystem.
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# Don't use this one!
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coldboot:
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@@ -40,16 +53,22 @@ coldboot:
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# Filesystem image
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image.fs: cmd others
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$(MKFS) --format simh proto
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$(MKFS) proto
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$(FSCK) image.fs
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# Alternate filesystem image: . and .. but no dd
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altimage.fs: altcmd altothers
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$(MKFS) -1 -2 -3 -o altimage.fs altproto
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$(FSCK) -3 altimage.fs
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copybinaries:
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mkdir -p $(BINARIES)
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cp image.fs $(BINARIES)
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cp a.rim $(BINARIES)
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clean:
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rm -f a.rim image.fs a.lst n.out
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rm -f a.rim image.fs a.lst n.out altimage.fs alta.rim alta.lst
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rm -rf $(BINDIR)
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rm -rf $(TESTDIR)
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rm -rf $(BINARIES)
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@@ -62,6 +81,11 @@ cmd: dirs $(BINDIR)/as $(BINDIR)/cat $(BINDIR)/check $(BINDIR)/chmod \
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$(BINDIR)/chown $(BINDIR)/chrm $(BINDIR)/cp $(BINDIR)/ds $(BINDIR)/ed \
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$(BINDIR)/init
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# Alternate commands: no dd, but . and ..
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altcmd: dirs $(BINDIR)/as $(BINDIR)/cat $(BINDIR)/check $(BINDIR)/chmod \
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$(BINDIR)/chown $(BINDIR)/altchrm $(BINDIR)/cp $(BINDIR)/ds $(BINDIR)/ed \
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$(BINDIR)/altinit
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$(BINDIR)/as: $(CMDSRC)/as.s
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$(AS) $(ASARGS) -o $(BINDIR)/as $(CMDSRC)/as.s
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@@ -80,6 +104,9 @@ $(BINDIR)/chown: $(CMDSRC)/chown.s
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$(BINDIR)/chrm: $(CMDSRC)/chrm.s
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$(AS) $(ASARGS) -o $(BINDIR)/chrm $(CMDSRC)/chrm.s
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$(BINDIR)/altchrm: $(OTHERSRC)/wktchrm.s
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$(AS) $(ASARGS) -o $(BINDIR)/altchrm -DNO_DD $(OTHERSRC)/wktchrm.s
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$(BINDIR)/cp: $(CMDSRC)/cp.s
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$(AS) $(ASARGS) -o $(BINDIR)/cp $(CMDSRC)/cp.s
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@@ -92,10 +119,19 @@ $(BINDIR)/ed: $(CMDSRC)/ed1.s $(CMDSRC)/ed2.s
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$(BINDIR)/init: $(CMDSRC)/init.s
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$(AS) $(ASARGS) -o $(BINDIR)/init $(CMDSRC)/init.s
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# Alternative init: no dd directory
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$(BINDIR)/altinit: $(CMDSRC)/init.s
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$(AS) $(ASARGS) -DNO_DD -o $(BINDIR)/altinit $(CMDSRC)/init.s
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# The commands that did not come from the scans
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others: dirs $(BINDIR)/sh $(BINDIR)/wktcat $(BINDIR)/wktcp $(BINDIR)/date \
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$(BINDIR)/ln $(BINDIR)/ls $(BINDIR)/mv $(BINDIR)/stat
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# Alternative other commands: no dd, but . and ..
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altothers: dirs $(BINDIR)/sh $(BINDIR)/wktcat $(BINDIR)/wktcp $(BINDIR)/date \
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$(BINDIR)/ln $(BINDIR)/altls $(BINDIR)/mv $(BINDIR)/stat
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$(BINDIR)/sh: $(OTHERSRC)/pbsh.s
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$(AS) $(ASARGS) -o $(BINDIR)/sh $(OTHERSRC)/pbsh.s
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@@ -114,6 +150,9 @@ $(BINDIR)/ln: $(OTHERSRC)/wktln.s
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$(BINDIR)/ls: $(OTHERSRC)/wktls.s
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$(AS) $(ASARGS) -o $(BINDIR)/ls $(OTHERSRC)/wktls.s
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$(BINDIR)/altls: $(OTHERSRC)/wktls.s
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$(AS) $(ASARGS) -o $(BINDIR)/altls -DNO_DD $(OTHERSRC)/wktls.s
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$(BINDIR)/mv: $(OTHERSRC)/wktmv.s
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$(AS) $(ASARGS) -o $(BINDIR)/mv $(OTHERSRC)/wktmv.s
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@@ -0,0 +1,47 @@
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# Alternative prototype file for PDP-7 Unix filesystem layout
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#
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# This one has . and .. but no dd directory entries
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#
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# Entries are one of:
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# filename f[r-][w-][r-][w-] uid local_file_to_insert
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# dirname d[r-][w-][r-][w-] uid [inumber]
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# device i[r-][w-][r-][w-] uid inumber
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# link l---- inumber
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#
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# The top directory's name is ignored
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# Numeric values are in decimal
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# Contents of each directory ends with a $ on a line by itself
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# Format was inspired by 6th Edition mkfs
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#
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/ drwr- -1 2
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system drwr- -1 3
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ttyin irwr- -1 6
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keyboard irwr- -1 7
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pptin irwr- -1 8
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ttyout irwr- -1 11
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display irwr- -1 12
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pptout irwr- -1 13
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as frwr- -1 bin/as
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cat frwr- -1 bin/cat
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chmod frwr- -1 bin/chmod
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chown frwr- -1 bin/chown
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chrm frwr- -1 bin/altchrm
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cp frwr- -1 bin/cp
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date frwr- -1 bin/date
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ds frwr- -1 bin/ds
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ed frwr- -1 bin/ed
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init frwr- -1 bin/altinit
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ln frwr- -1 bin/ln
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ls frwr- -1 bin/altls
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mv frwr- -1 bin/mv
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password frw-- -1 fs/password
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sh frwr- -1 bin/sh
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stat frwr- -1 bin/stat
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$
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ken drwr- 10
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system l---- 3
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hello frwr- 10 fs/hello
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$
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dmr drwr- 12
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system l---- 3
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$
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@@ -0,0 +1,12 @@
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set cpu 8k
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set cpu eae
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set cpu history=100
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show cpu
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set tti unix
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set rb ena
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att rb altimage.fs
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show dev
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load -S alta.rim
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dep pc 0100
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