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162 lines
5.1 KiB
Groff
Executable File
162 lines
5.1 KiB
Groff
Executable File
;;; Copyright (c) 1999 Massachusetts Institute of Technology
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;;; See the COPYING file at the top-level directory of this project.
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;channel header pointer (location 40, read only)
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;
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; ADDRESS(channel header area)
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; ADDRESS(pointer area)
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; I/O version number
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; source file version number
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; 0 always 0
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; INITED non-zero indicates PDP-11 is running ok(can be cleared by PDP-10)
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; 0 always 0
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; GDOWN used as flag by PDP-10 to acknowledge clear of INITED
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;
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;channel header area (aligned on PDP-10 word)
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;
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; KBD channel:
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; KBDFLG cleared by 10/set by 11 (chain of activated KBD buffers)
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; 0 allows PDP-10 to do SKIPN for activation test
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; DPY channel: (1 per console)
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; DPYCHN buffer assigned to channel, if zero then DPY channel is closed
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; DPYKBD .BYTE KBD#, DPY# (377 for either implies not assigned)
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; KBD flags: (1 per console)
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; ECOFLG Set by PDP-10. Next time DPYBUF is empty clear ECOFLG
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; and put flag on KBD ring to signal this condition
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; CHNCLS if -1, log this guy out!!!!
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; WHO flags: (1 per console)
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; WHOLIN who line variables for this console
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; WHOUSR -1=>do system line, 0=>user who line
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;
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;format of KBD buffer (aligned on PDP-10 word)
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;
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; KBDSTS negative=>-(data byte count), 0=>free
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; 0
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; KBDRNG next KBD buffer associated with this KBD
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; KBDLST next buffer on activated list (0=>end of chain)
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; KBDCHN keyboard channel
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; 0 not used
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; KBDATA key board data area (1 PDP-11 word/character)
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;
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;format of DPY buffer (aligned on PDP-10 word)
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;
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; DPY10B word PDP-10 is hacking (used only for initailization)
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; DPY11B word PDP-11 is hacking
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; DPYPP page printer variables
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; DPYLGL last legal address in this buffer
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; DPYSIZ size of data area in bytes
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; 0 not used
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; DPYATA display data area (1 PDP-11 word/character)
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;
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;format of pointer area (aligned on PDP-10 word)
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;
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; ADDRESS(system who line variables)
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; ADDRESS(PDP-10/PDP-11 communication area)
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; TENWHO (SET TO -1 WHENEVER ANYONE TYPES WHO LINE COMMAND, RESET TO 0 WHEN 10
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; UPDATES WHO LINES
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; TENWH1 PADDING
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;
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;Notes:
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;
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;1. All addresses and pointers are in PDP-11 address space.
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;
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;2. KBD buffers are ringed two per channel. While the PDP-10 is
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; emptying one, the PDP-11 can fill the other.
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;
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;3. There is only one DPY buffer per channel. When the buffer is filled
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; with negative numbers, it is free. When the PDP-10 writes a positive
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; number in the current word: then the PDP-11 processes the data in that
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; word, sets that word to a negative number, and advances to the next word.
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; WHO LINE VARIABLES
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;
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;SYSTEM WHO LINE (one PDP-11 word/line unless otherwise indicated)
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; ITSTCH # total # 10/11 dpy channels (read only for PDP-10)
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; ITSCHN # 10/11 dpy channels in use (read only for PDP-10)
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; ITSVER ITS version #
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; ITSJOB total jobs
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; ITSCOR total core
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; ITSRU runnable users
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; ITSWBJ # jobs swap blocked
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; ITSJWP # jobs waiting for pages
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; ITSTRC total runable core
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; ITSCFU core available for users
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; ITSDAT date [byte (7) year (4) month (5) day]
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; ITSDBG system debug flag
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; ITSTIM time of day (# half seconds since midnight) aligned on PDP-10 word
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; ITSTI1 low order of time
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; ITSUSR total number of users
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;
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;USER WHO LINE (One PDP-11 word per line unless otherwise noted)
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WHJOB==0 ;job #, -1=>who line not in use
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; WHJOB1 ;pads WHJOB
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WHMODE==1 ;mode 0=>follow keyboard
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; 1=>freeze
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; 2=>next higher (when PDP-10 sees this state, it searches
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; user variables for next higher job index number with same
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; uname. When it finds it, it stores the number in job #
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; and changes mode to 1
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; 3=>next lower
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; WHMOD1 ;pads WHMODE
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WHUNAM==2 ;uname in sixbit (left 18 bits in first two words, right in next two)
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; WHUNM1
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WHUNM2==3
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; WHUNM3
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WHJNAM==4 ;jname in sixbit
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; WHJNM1
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WHJNM2==5
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; WHJNM3
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WHSNAM==6 ;sname in sixbit
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; WHSNM1
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WHSNM2==7
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; WHSNM3
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WHSTAT==10 ;status in sixbit, 0=>job does not exist
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; WHSTA1
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WHSTA2==11
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; WHSTA3
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WHJ%RT==12 ;job % run time
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; WHJTRT job total run time (one millisec units)
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; WHRPAG job number of pages real mem assigned
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; WHPAG job number of pages virtual mem assigned
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; WHO1 user who line control word
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; WHO1A
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; WHO2 first user who line variable
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; WHO2A
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; WHO2B
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; WHO2C
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; WHO3 second user who line variable
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; WHO3A
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; WHO3B
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; WHO3C
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;
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;
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;NOTE: The PDP-11 will not update who lines until it sees that ITSTIM
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; has changed.
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;
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;PDP-10/PDP-11 COMMAND CHANNEL
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;
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; CMDFLG aligned on PDP-10
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; 0=>buffer is free (PDP-10 can write CMDBUF)
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; positive=>command # from PDP-10 (PDP-11 can write CMDBUF)
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; negative=>affirmative reply from PDP-11 (0=>command failed)
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; PDP-10 can read CMDBUF, then must zero CMDFLG
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; CMDFL1 always 0
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; CMDBUF each arg takes 4 bytes (1 PDP-10 word)
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;
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; PDP-10/PDP-11 COMMANDS
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;
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; 1 video switch
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; arg1: video switch input # (set by PDP-10)
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; arg2: video switch output # ( " " " " )
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;
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; 2 reserve DPY
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; arg1: DPY reserved (set by PDP-11)
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;
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; 3 free DPY
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; arg1: DPY to free (set by PDP-10)
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;
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;;other 10-11 commuincation issues ..
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;
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;;go down resetting video switch vs not
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;;PDP-11 indicates it has reset video switch
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; ;(PDP-10 then detaches all jobs with tv ttys)
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