Added Phils opr.s and kernel notes files
This commit is contained in:
Warren Toomey
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bin
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sys
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" ops and system calls from as7; as.s has no initial symbol table
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" so this needs to be included in any assembly of user programs
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" "sys" has it's own sop.s which includes I/O instructions, but lacks
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" system call definitions, and lacks some instructions used in
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" commands but not in the kernel, so it can't have been the file used
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" for user assemblies.
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save = 1 " saves core dump & user area!
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getuid = 2
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open = 3
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read = 4
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write = 5
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creat = 6
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seek = 7
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tell = 8
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close = 9
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link = 10
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unlink = 11
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setuid = 12
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rename = 13
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exit = 14
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time = 15
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intrp = 16
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chdir = 17
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chmod = 18
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chown = 19
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" 20 removed
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sysloc = 21 " return system addresses
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" 22 removed
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capt = 23 " capture display?
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rele = 24 " release display?
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status = 25 " "stat"
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smes = 27
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rmes = 28
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fork = 29
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" List of instruction names and machine code values
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" These come from https://raw.githubusercontent.com/simh/
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sys = 0020000 " "cal i" instruction (trap indirect thru 020)
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i = 0020000 " indirect bit
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" memory reference instructions
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dac = 0040000 " deposit AC
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jms = 0100000 " jump to subroutine
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dzm = 0140000 " deposit zero in memory
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lac = 0200000 " load AC
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xor = 0240000 " exclusive or
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add = 0300000 " one's complement add
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tad = 0340000 " two's complement add
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xct = 0400000 " execute
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isz = 0440000 " increment and skip if zero
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and = 0500000 " AND with contents of Y
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sad = 0540000 " skip if AC different from content of Y
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jmp = 0600000 " jump to Y
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" Type 177 Extended Arithmetic Element (EAE)
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eae = 0640000 " base instruction (nop)
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osc = 0640001 " OR SC into AC
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omq = 0640002 " OR MQ into AC
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cmq = 0640004 " Complement MQ
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div = 0640323 " divide
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norm = 0640444 " normalize unsigned
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lls = 0640600 " long left shift
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als = 0640700 " AC shift
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lrs = 0640500 " long right shift
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lacs = 0641001 " load AC with SC
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lacq = 0641002 " load AC with MQ
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abs = 0644000 " absolute value
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divs = 0644323 " divide signed
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clq = 0650000 " clear MQ
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frdiv = 0650323 " fractional divide
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lmq = 0652000 " load MQ from AC
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mul = 0653122 " multiply
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idiv = 0653323 " integer divide
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idivs = 0657323 " integer divide signed
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frdivs = 0654323 " fractional divide signed
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muls = 0657122 " multiply signed
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norms = 0660444 " normalize signed
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gsm = 0664000 " get sign and magnitude
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lrss = 0660500 " long right shift signed
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llss = 0660600 " long left shift signed
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alss = 0660700 " AC left shift signed
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" Operate Instructions
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" Group 1 (OPR 1) instructions
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opr = 0740000 " base operate instruction (nop)
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nop = 0740000
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cma = 0740001 " complement accumulator
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cml = 0740002 " complement link
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oas = 0740004 " inclusive or accumulator switches
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ral = 0740010 " rotate (ac link) left
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rar = 0740020 " rotate (ac link) right
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hlt = 0740040 " HALT
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xx = 0740040
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sma = 0740100 " skip on minus accumulator
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sza = 0740200 " skip on zero accumulator
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snl = 0740400 " skip on non-zero link
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skp = 0741000 " unconditional skip
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spa = 0741100 " skip on positive accumulator
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sna = 0741200 " skip on negative accumulator
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szl = 0741400 " skip on zero link
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rtl = 0742010 " rotate two left (ral*2)
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rtr = 0742020 " rotate two right (rar*2)
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cll = 0744000 " clear link
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stl = 0744002 " set link
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rcl = 0744010 " clear link rotate left
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rcr = 0744020 " clear link rotate right
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cla = 0750000 " clear accumulator
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clc = 0750001 " clear and complement acc
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las = 0750004 " load acc from switches
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glk = 0750010 " get link
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" Group 2 operate
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law = 0760000 " load accumulator with (instruction)
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PROCESSES
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=========
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uid -1 is superuser
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process 1 is "init", runs as superuser
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DISK
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====
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```
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RB09: Burroughs fixed head disk (same hardware as RD10!)
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64 word sectors; 80 sectors/track; 100 tracks/surface; 2 surfaces
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8000 sectors/surface
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one surface reserved for backup
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512,000 words per surface: 1,024,000 characters!!!
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first disk block is copy of "system data"
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contains time, free block information, process (user) list?!!
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12 word inodes (5 per block)
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710 sectors of inodes (max 3550 files)
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```
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inode format
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------------
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```
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i.flags
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400000 free?? (checked/toggled by icreat)
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200000 large file
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000040 special file
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000020 directory
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000017 can be changed by chmod.
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10 owner read
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04 owner write
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02 world read
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01 world write
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i.dskps 7 block numbers (all indirect blocks if "large file")
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i.uid owner
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i.nlks link count
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i.size size (in words?)
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i.uniq unique value assigned at creation
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```
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directory files can (only) be truncated by superuser
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directory node (dnode) format
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-----------------------------
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```
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d.i i-number of file
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d.name four words, space padded
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d.uniq i.uniq value of file
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```
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i numbers
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---------
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```
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1 core file?? (written by "sys save" or bad system call)
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2 "dd"??? "root" directory
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3 "system"??? default process cdir, must contain "init", "dd"
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6 "ttyin" special file
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7 "keyboard" (graphic-2) special file
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8 "pptin"?? (paper tape reader) special file
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10 "ttyout" special file
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11 "display" (graphic-2) special file
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12 "pptout" (paper tape punch) special file
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```
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