phil
4b284c6bbe
Improve sys annotations
...
Finally understand location 7 (incremented at 60Hz)
setting it to -1 causes clock interrupt every jiffy
Improve comments in dsktrans
Clarify cnop/cskp usage in iread/iwrite code
iwrite and iread have common code
entry at iwrite save return address at iread
and overwrites return address to "skp" inst
entry at iread puts "nop" inst at iwrite
"xct iwrite" skips on write entry
2019-10-21 22:24:09 -04:00
Warren Toomey
f6f05e6483
A few lines got lost in the last edit to s6.s, now fixed.
2016-04-28 15:04:29 +10:00
Phil Budne
1a4c0c3c71
s6.s: add comments
2016-04-17 13:26:12 -04:00
Phil Budne
c8129d7fa4
s4.s: comment disk block free and (self modifiying) char queue routines
2016-04-17 13:26:12 -04:00
Phil Budne
cb187e12be
update queue (and other) storage comments
2016-04-17 13:26:11 -04:00
Phil Budne
032dc37705
sys: alloc comments
2016-04-17 13:26:11 -04:00
Phil Budne
208ed1dbf5
sys comments
2016-03-31 22:53:27 -04:00
Phil Budne
615bdba101
s4.s: more comments
2016-03-29 22:18:47 -04:00
Phil Budne
687bbb06cf
fix buffer cache search
2016-03-29 21:20:37 -04:00
Phil Budne
77d49f4328
s3.s: fix a comment typo
2016-03-29 11:05:03 -04:00
Phil Budne
fa74947215
sys: comments for seek & tell
2016-03-28 01:02:54 -04:00
Phil Budne
9b675f2c52
fix comment paste-o
2016-03-27 01:26:30 -04:00
Phil Budne
72bbd8d4e6
s8.s: adjust "init" literal to be acceptable to native "as"
2016-03-25 01:02:38 -04:00
Phil Budne
989bd7039e
coped maksys.s from scans; fixed assembly errors
2016-03-24 01:03:44 -04:00
Warren Toomey
ce0a5401a9
Add trysys.s to src/sys.
2016-03-24 06:20:38 +10:00
Phil Budne
ac6e7470cf
disk buffer comments (and comments about a mystery)
2016-03-22 21:29:46 -04:00
Phil Budne
164125be7e
sys comments
2016-03-21 11:00:19 -04:00
Warren Toomey
94fd5d49e0
I've restructured the alternative version of PDP-7 Unix so that the
...
source code is now in src/alt. All the files in src/sys and src/cmd
are only annotated versions of the files in scans/.
The build/Makefile has been updated so that it can build the
original PDP-7 Unix or the alternative version.
Phil has fixed the Graphics-2 code, so that there is no need to
have any #ifdef code in the original kernel.
2016-03-21 16:01:36 +10:00
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
Phil Budne
053aedcf95
s7.s: fix sna/sma confusion that caused hangs in display PI code
2016-03-19 00:51:07 -04:00
Warren Toomey
64a118cb4a
More kernel notes.
2016-03-19 11:05:37 +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
Phil Budne
89356e9aea
sys (display) comments
2016-03-17 00:08:28 -04:00
Phil Budne
f91b929d90
fix/add sys comments
2016-03-17 00:08:28 -04:00
Warren Toomey
320dd0418f
Add missing dput to .rename
2016-03-16 11:24:56 +10:00
Phil Budne
fe48c8cdc8
system comments
2016-03-15 20:48:42 -04:00
Phil Budne
b94ca04259
sop.s: add comment for "cdf" IOT
2016-03-15 06:53:15 -04:00
Phil Budne
ab76e46005
sys: add comments
2016-03-15 06:53:04 -04:00
Warren Toomey
4073baba05
Fix transcription error in s2.s link.
2016-03-14 20:19:48 +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
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
Phil Budne
8c20d30cd1
sop: add missing "spa" (not used in kernel!)
2016-03-13 00:05:57 -05:00
Phil Budne
a929bc08b7
fix OMQ definition
2016-03-13 00:05:57 -05:00
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
Phil Budne
adc6fdcc50
sys NOTES.md: update i.nlnks comment
2016-03-11 16:33:53 -05:00
Phil Budne
9372fa5f56
sys: more comments
2016-03-11 16:32:11 -05:00
Phil Budne
802ab257b9
sys: kernel comments
2016-03-11 16:01:01 -05:00
Phil Budne
df1d8e29dd
update sys NOTES
2016-03-11 11:23:59 -05:00
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
Phil Budne
2ff3a45a64
sys: fix "mul" in sop.s
2016-03-10 17:54:21 -05:00
Warren Toomey
b03cc44290
Fixed up the llss instruction in a7out.
2016-03-10 07:44:31 +10:00
Phil Budne
cf47a841b2
more markdown
2016-03-08 12:14:05 -05:00
Phil Budne
858fe3dd13
notes on kernel & disk format
2016-03-08 12:10:31 -05:00
Phil Budne
03d5e49ae9
sys comments for rmes/smes calls, process table (user list) words
...
noticed "exit" call falls into "rmes" call!!!
2016-03-08 11:51:03 -05:00
Phil Budne
a80e2afda7
update comments for "passone" (return one character from special device)
2016-03-07 17:22:33 -05:00
Phil Budne
1033fa24bf
update comment for TTY inter char (ALT MODE key?)
2016-03-07 17:22:32 -05:00
Phil Budne
efb0553d7f
system comments
2016-03-03 21:14:35 -05:00
