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Warren Toomey f63ad33d10 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
 2016-03-21 14:28:50 +10:00
Warren Toomey 098c8a9e28 I've split the cmd and others Makefile rules out to individual utility rules, 
so that we don't keep building binaries for sources that have not changed.
 2016-03-21 06:51:00 +10:00
Warren Toomey 4a7752d637 More comments to top-level README.md 2016-03-20 22:17:04 +10:00
Warren Toomey 91e2f4dd1a Add details about the mailing list. 2016-03-20 22:07:54 +10:00
Warren Toomey 6b9151d3e3 Print out an error message if ls is given a name that doesn't exist. 2016-03-20 21:03:53 +10:00
Warren Toomey acf853d1a3 I changed the Makefiles so that I could make run without rebuilding 
everything. This is mainly because I often boot the system several times
in a row when debugging, and I didn't want to have to build everything
just to reboot the system :-)
 2016-03-20 20:55:43 +10:00
Warren Toomey f1629e9891 A few discrepancies fixed up. 2016-03-20 20:49:03 +10:00
Warren Toomey d1885214ce Fixed a bug when we had to skip a direntry with a zero i-num. 2016-03-20 09:26:55 +10:00
Warren Toomey 520478a3e4 I moved most of the building code into the build/Makefile. 2016-03-20 09:14:47 +10:00
Warren Toomey 2409028f15 Put back the original code from scans. 2016-03-20 08:42:26 +10:00
Warren Toomey b9fa7fb4fb Fix up the link count code. 2016-03-19 14:37:23 +10:00
Warren Toomey 64a118cb4a More kernel notes. 2016-03-19 11:05:37 +10:00
Warren Toomey 6d15e6f29a Slight changes to the top-level Readme. 2016-03-19 10:54:40 +10:00
Warren Toomey e44bc6daa3 Added note about fsck7. 2016-03-19 07:27:18 +10:00
Warren Toomey b232a4b1a6 Added simple code coverage output to a7out. Added a few ed comments. 2016-03-19 07:25:07 +10:00
Warren Toomey bc189fa861 More kernel comments. 2016-03-19 06:33:00 +10:00
Warren Toomey 0eb720f3ab It's time we had ed as a binary, so we have another goal to reach: making ed work. 2016-03-19 06:30:31 +10:00
Warren Toomey 17a828cfcd mkfs: I moved the order of ., .. and dd around to me more pleasing to the eye. I also 
added some simple link count code.
 2016-03-19 06:25:20 +10:00
Warren Toomey 956bd28ac1 Added the inum field. No idea why it didn't get picked up in the previous 
two commits.
 2016-03-18 19:55:33 +10:00
Warren Toomey 72322c23b2 A few more ls comments. 2016-03-18 19:53:47 +10:00
Warren Toomey 9483300758 sys status returns 13 words, the last one holds the i-number. 2016-03-18 19:47:05 +10:00
Warren Toomey b8b1ac5d95 I changed ls to have a directory as an optional argument. 
This allows it to work when we don't have .
 2016-03-18 10:25:45 +10:00
Warren Toomey fbbe0c6729 Added command line options to enable . and .. 2016-03-17 09:08:37 +10:00
Warren Toomey 3c3f946794 Added hello to the proto file. 2016-03-16 11:38:09 +10:00
Warren Toomey 320dd0418f Add missing dput to .rename 2016-03-16 11:24:56 +10:00
Warren Toomey bb0a7084b3 More kernel build comments. 2016-03-16 09:52:16 +10:00
Warren Toomey 248dfafe0d Change tti to the new unix format, and let the kernel boot up. 2016-03-16 09:48:10 +10:00
Warren Toomey 9f536032b0 Fixed stat so it works. 2016-03-16 09:42:44 +10:00
Warren Toomey 202fbcefb6 Fixed ln to have three arguments. Use stdout not stderr. 2016-03-16 09:22:06 +10:00
Warren Toomey 5f1229cb9c Tidy up. 2016-03-16 06:55:09 +10:00
Warren Toomey 6c5b207aba I uncommented Phil's code so that we can run binaries from system now. 2016-03-16 06:38:56 +10:00
Warren Toomey e5bcd5c264 More comments 2016-03-16 06:22:12 +10:00
Warren Toomey 1bee26fba1 Fixed the daynum value in the date output. 2016-03-16 06:17:39 +10:00
Warren Toomey f64b3f0799 Added code to skip over directory entries with i-num zero. 2016-03-16 06:08:53 +10:00
Warren Toomey b4891828de Merge branch 'master' of https://github.com/DoctorWkt/pdp7-unix 2016-03-16 05:37:25 +10:00
Warren Toomey 00c2de0292 I bit the bullet and implemented "." in the filesystem. I've changed the proto 
file to put the binaries in system. I added a few more checks to fsck, and I fixed
a few bugs in src/other/wktls.s.
 2016-03-16 05:36:22 +10:00
Warren Toomey 56f6da9cd8 New tool fsck7 2016-03-15 15:49:40 +10:00
Warren Toomey fe6c5cc8eb Updated the top-level Readme. 2016-03-14 21:52:25 +10:00
Warren Toomey f3519fc34b More build notes. 2016-03-14 21:24:13 +10:00
Warren Toomey 624776e0f3 Argh. A real dumb bug in mkfs7 that stopped us getting a shell. Fixed. 2016-03-14 21:22:29 +10:00
Warren Toomey 5f55b5dc79 More notes on bringing up the kernel. 2016-03-14 21:04:57 +10:00
Warren Toomey 4073baba05 Fix transcription error in s2.s link. 2016-03-14 20:19:48 +10:00
Warren Toomey cbdcf268f7 More kernel notes. 2016-03-14 19:53:00 +10:00
Warren Toomey 9da0484a39 I've got init past the link, but it then dies on the open("sh") immediately 
after that. Yes, dd has to be i-num 4. I've modified mkfs7 and the proto
file to allow this to occur. I've also make link counts negative.
 2016-03-14 19:49:37 +10:00
Warren Toomey cd7befb2de More kernel comments: link. 2016-03-14 18:26:36 +10:00
Warren Toomey cfa57f16b3 More kernel comments: partial comments for namei. 2016-03-14 17:50:13 +10:00
Warren Toomey 6ffdf4076d More kernel comments: iget 2016-03-14 17:40:46 +10:00
Warren Toomey 77c30047e9 Get the build Makefile to output a kernel symbol table. 2016-03-14 16:51:25 +10:00
Warren Toomey 7b5cd4a135 Changed init.s so that the new as7+cpp can process it. 2016-03-14 10:54:06 +10:00
Warren Toomey 588e2a30b8 More kernel notes. 2016-03-13 21:14:16 +10:00
Warren Toomey 3629461a20 Merge branch 'master' of https://github.com/DoctorWkt/pdp7-unix 2016-03-13 21:09:33 +10:00
Warren Toomey 8b421eb27b I've commited a change to as7 to use the C pre-processor. Not sure if it's 
to everybody's taste.
 2016-03-13 21:08:43 +10:00
Warren Toomey 98145f562a More kernel notes. 2016-03-13 15:11:19 +10:00
Warren Toomey d4e01c7da6 More kernel notes. 2016-03-13 14:43:38 +10:00
Warren Toomey 4860c0a8b0 I've commented out some of the code in s7.s to try and disable the 
Graphics-2 I/O operations.
 2016-03-13 14:36:33 +10:00
Warren Toomey ba3b33d7da There seems to be a transcription error in s7.s, I fixed by eyeballing 
the scans.
 2016-03-13 13:21:25 +10:00
Warren Toomey 4a51b4e6bb Added a notes file to store details of the attempts to bring up 
the kernel.
 2016-03-13 13:14:11 +10:00
Warren Toomey cff237d445 Added dir.5 and filesys.5 manuals. 2016-03-13 09:58:18 +10:00
Warren Toomey 1829f8577f Added graphviz output to xref7 so that we can see the call graph. 2016-03-13 07:27:29 +10:00
Warren Toomey abf5ae6149 Also print out the routine's filename in xref7. 2016-03-12 22:53:33 +10:00
Warren Toomey ffb6676a39 I wrote a very simplistic tool to generate kernel cross references. 2016-03-12 22:37:37 +10:00
Warren Toomey f3dad7916b Clean up comments. 2016-03-11 22:31:40 +10:00
Warren Toomey e7d04b5dee Added Readme comment 2016-03-11 22:27:06 +10:00
Warren Toomey fed0d959b7 Replace numeric literal with constant. 2016-03-11 22:18:04 +10:00
Warren Toomey e5457d15fb I've added code to mkfs7 to build a free block list, to write it out to 
the disk image, and to add a pointer in block zero to the beginning of
the list.
 2016-03-11 22:00:25 +10:00
Warren Toomey bfeb833141 Added sdump tool, added a coldboot option to build/Makefile, added a few 
kernel comments.
 2016-03-11 16:00:10 +10:00
Warren Toomey 97f29f046c Moved proto and password to build/ 2016-03-11 10:30:05 +10:00
Warren Toomey becb1f4996 So, SimH stores things big-endian. Fixed mkfs7. 2016-03-11 07:04:53 +10:00
Warren Toomey 8d487fee5c Off by 1 errors in mkfs7, now fixed. 2016-03-11 06:57:46 +10:00
Warren Toomey 947d44a681 I've used Phil's instructions to set up a build area with a Makefile. 
You can run make build from the top to build things.
 2016-03-10 17:02:46 +10:00
Warren Toomey 86135be03e More mkfs changes as Phil tries to get the kernel up to reading init. 2016-03-10 16:48:12 +10:00
Warren Toomey 7daa5f7a64 Get mkfs7 to write 8000 empty blocks to fill the bottom half before the 
real filesystem in the top half.
 2016-03-10 16:36:45 +10:00
Warren Toomey 436929b83c Changed the filesystem proto file and enhanced the mkfs7 tool based on 
Phi's analysis of the filesystem.
 2016-03-10 16:04:35 +10:00
Warren Toomey 19f13c8107 Merge branch 'master' of https://github.com/DoctorWkt/pdp7-unix 2016-03-10 15:29:14 +10:00
Warren Toomey 7e7b05ce17 I've created an area so that we can test kernel mode code in SimH. 2016-03-10 15:28:42 +10:00
Warren Toomey e28c9f1ee7 check.s comments 2016-03-10 15:06:08 +10:00
Warren Toomey ca13ce503e Fixed some typos in check.s 2016-03-10 14:21:10 +10:00
Warren Toomey 089c8b806f I made a change to the word2ascii routine and replicated it out to other programs. 2016-03-10 14:14:57 +10:00
Warren Toomey f468628159 Fixed a small i-node calculation bug, and added more debug messages. 2016-03-10 14:11:22 +10:00
Warren Toomey e784132ba4 Added better debugging output, fix a bug converting ASCII to words. 2016-03-10 13:28:02 +10:00
Warren Toomey 4b90522231 Fix list output logic. 2016-03-10 12:56:51 +10:00
Warren Toomey 3ef14fa6f6 Oops, I forgot to actually write the file contents into the filesystem image. 2016-03-10 12:54:46 +10:00
Warren Toomey d1b995e771 I've written more of mkfs7 but not tested it yet. 2016-03-10 12:46:00 +10:00
Warren Toomey 739d317415 More readme tweaks. 2016-03-10 10:26:52 +10:00
Warren Toomey 3952727b0b Merge branch 'master' of https://github.com/DoctorWkt/pdp7-unix 2016-03-10 10:23:04 +10:00
Warren Toomey 6ecf5da1a3 Updated README.md 2016-03-10 10:22:40 +10:00
Warren Toomey 2880d1b2e4 I've made a start on a mkfs tool for PDP-7 Unix. So far I have the routines 
to build the filesystem, but they are not tested. I need to add code to
parse the "proto" file, whose syntax is based on the 6th Edition proto file.
I also need to dump out the filesystem image.
 2016-03-10 09:53:05 +10:00
Warren Toomey 0517b7c2fc Merge branch 'master' of https://github.com/DoctorWkt/pdp7-unix 2016-03-10 07:44:54 +10:00
Warren Toomey b03cc44290 Fixed up the llss instruction in a7out. 2016-03-10 07:44:31 +10:00
Warren Toomey 3be45d4383 Moved opr.s to src/other as it is not a proper utility and wasn't in the scans. 2016-03-09 06:48:37 +10:00
Warren Toomey 10ab3acbc9 Merge branch 'master' of https://github.com/DoctorWkt/pdp7-unix 2016-03-09 06:48:15 +10:00
Warren Toomey 3cb05b5767 Added Phils opr.s and kernel notes files 2016-03-09 06:47:48 +10:00
Warren Toomey c65a5587fb Comments to kernel files by Phil. 2016-03-09 06:45:44 +10:00
Warren Toomey 286acea85b With src/cmd/as.s modified to use als (because a7out is broken) and removing 
the definitions of . and .. from wktopr.s, I can now assemble cat.s with
the PDP-7 as and execute the resulting a.out file!
 2016-03-08 20:05:14 +10:00
Warren Toomey 77505026ae I made my own opr.s with definitions for . and .. and now the native 
PDP-7 as can assemble cat.s. I haven't checked the output yet.
 2016-03-08 19:03:28 +10:00
Warren Toomey 10a0983cc4 as.s typo. 2016-03-08 18:47:14 +10:00
Warren Toomey e652be0b14 Added date manual. 2016-03-08 17:07:49 +10:00
Warren Toomey 7ab65c4727 Added a runsh option to the Makefile 2016-03-08 16:56:54 +10:00
Warren Toomey 07a098cb53 Changed the top-level Makefile to make date and to use the new ptr format 
for the binaries.
 2016-03-08 16:46:39 +10:00
Warren Toomey e9c8aae876 Merge branch 'master' of https://github.com/DoctorWkt/pdp7-unix 2016-03-08 16:43:47 +10:00