In the pursuit of getting to know our VSxx00 machines better with 
the goal of getting a VS port of NetBSD, here goes:

VAXstation 3100 Boot Monitor 'Research'

HELP command

Syntax:

 HELP

 Prints out the following:


 DEPOSIT [{ /B | /W | /L}] [{ /P | /V | /I }] [/G] [/U] [/N:<n>]
         [{ <addr> | <sym> | + | - | * | @ } [<datum>]]
 EXAMINE [{ /B | /W | /L}] [{ /P | /V | /I }] [/G] [/U] [/N:<n>]
         [{ <addr> | <sym> | + | - | * | @ }]
 SET BOOT <ddau>
 SET BFLG <bflg>
 SET HALT <1-3>
 SET KBD <0-15>
 SET MOP <0-1>
 SET TRIG <0-1>
 SET PWSD
 SET PSE <0-1>
 SHOW { BOOT | BFLG | DEV | ETHER | HALT | KBD | MOP |
        TRIG | MEM | ESTAT | SCSIA | SCSIB | PSE | VER}
 INITIALIZE
 UNJAM
 BOOT [/[R5:]<bflg>] <ddau>:
 CONTINUE
 START <addr>
 REPEAT <addr>
 TEST <n> [<m>]
 FIND [{ /MEMORY | /RPB }]
 LOGIN
 XFER <addr> <cnt> ...
 DTE
 HALT
 HELP

BOOT command

Syntax:

  BOOT [/[R5:]<bflg>] <ddau>:


 ddau - device in VMS/VMB column listed in 'SHOW DEV' command
 R5: - ???
 bflg - ???

  Bootstraps from and submits control to the loaded program retrieved from
  device 'ddau'

CONTINUE command

Syntax:

 CONTINUE

  Continues boot process interrupted by user

DTE  Command

Syntax:
 
 DTE

 Returns a '*>>>' prompt
 Runs Terminal mode (VT-100 compatible XON/XOFF flow control)
 ^P - exits terminal mode to Monitor mode.

DEPOSIT command

Syntax:

 DEPOSIT [{ /B | /W | /L}] [{ /P | /V | /I }] [/G] [/U] [/N:<n>]
         [{ <addr> | <sym> | + | - | * | @ } [<datum>]]

 Writes argument(s) to memory

  /B - byte  (8 bit) 
  /W - word  (16 bit)
  /L - long  (32 bit)
  /P - ???
  /V - ???
  /I - I registers (0x00-0x13) what are they for ???
  /G - G registers (0x00-0x0f) what are they for ???
  /U - ???
  /N:<n> - number of entries (bytes/words/longs)
  <addr> - memory address (hexidecimal)
  <sym> - ???
  + - increments pointer by byte/word/long
  - - decrements pointer by byte/word/long
  * - ???
  @ - ???
  <datum>  - that which is written to memory determined by  above  
             args 



EXAMINE command

Syntax:

 EXAMINE [{ /B | /W | /L}] [{ /P | /V | /I }] [/G] [/U] [/N:<n>]
         [{ <addr> | <sym> | + | - | * | @ }]

Examines memory contents

  /B - byte  (8 bit) 
  /W - word  (16 bit)
  /L - long  (32 bit)
  /P - ???
  /V - ???
  /I - I registers (0x00-0x13) what are they for???
  /G - G registers (0x00-0x0f) what are they for???
  /U - ???
  /N:<n> - number of entries (bytes/words/longs)
  <addr> - memory address (hexidecimal)
  <sym> - ???
  + - increment pointer by 1=byte, 2=word, 3=long
  - - decrement pointer by 1=byte, 2=word, 3=long
  * - ???
  @ - ???


LOGIN command

Syntax:

 LOGIN
  
  Prompts for username and password ???

HALT command

Syntax:

 HALT

  ???

XFER command

Syntax:

 XFER <addr> <cnt> ...

  ???

UNJAM command

Syntax:

 UNJAM

  ???

SHOW command

Syntax:

 SHOW { BOOT | BFLG | DEV | ETHER | HALT | KBD | MOP |
        TRIG | MEM | ESTAT | SCSIA | SCSIB | PSE | VER}

  Displays info on selected device.

  SHOW BOOT - Displays boot device set by 'SET BOOT' command
  SHOW BFLG - ???
  SHOW DEV - Displays peripheral device data according to
             the following structure:

   VMS/VMB  ULTRIX  ADDR  DEVTYP NUMBYTES RM/FX WP DEVNAM REV
   -------  ------  ----  ------ -------- ----- -- ------ ---
   xxxx     xxxx    xxxx  xxxx   xxxx     xx    xx  xxxx  xxxx
         
   VMS/VMB - Device name assigned by the VMS OS
   ULTRIX  - Device name assigned by the Ultrix OS
   ADDR    - Combination SCSI host / SCSI Dev ID / ??? / ???
   DEVTYP  - Device type such as DISK, INITR, etc.
   NUMBYTES - Device capacity
   RM/FX - Removable or fixed media
   WP - Write Protect active
   DEVNAM - Device name - RX23 = FDD, RZ24 = HDD, etc.
   REV - Device firmware revision info.   


  SHOW ETHER - Displays IP address: ID XX-XX-XX-XX-XX-XX
  SHOW HALT - ???
  SHOW KBD - Displays numeric code coresponding to language
             set by SET KBD or TEST 54 commands
  SHOW MOP - Displays master operating program info ???
  SHOW TRIG - ???
  SHOW MEM - Displays system RAM size.
  SHOW ESTAT - Displays ethernet status???
  SHOW SCSIA - Displays first SCSI host ID
  SHOW SCSIB - Displays second SCSI host ID
  SHOW PSE - ???
  SHOW VER - Displays ROM version info.

TEST command

Syntax:

 TEST <n> [<m>]

 n - number in decimal 00-99
 M - UNKNOWN

Function:
 
 Performs peripheral tests
00 - System diags???
01 - ??? 
02 - ???
03 - ???
04 - ???
05 - ???
06 - ???
07 - ???
08 - ???
09 - ???
50 - SCSI HDD subsystem
51 - SCSI FDD subsystem
54 - Set default language
61 - Reserved
62 - Reserved
75 - SCSI HDD format & surface test
76 - SCSI FDD format & surface test
80 - Video grid-circle-dots
81 - E's
82 - White full raster
83 - Blue-red-green=white vertical bars
84 - Red full raster
85 - Green full raster
86 - Blue full raster
87 - Black-blue-red-magenta-green-cyan-yellow-white vertical bars
88 - Ascending staircase AKA 'gray-scale'
89 - Upwardly scrolling H's

all other return '?23 ILL CMD'


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