This is actually from a KA655 CPU (MicroVAX 3800), not a KA650 (MicroVAX 3500) - AKV, one of my MicroVAXen has had a CPU upgrade at some point. Most of the commands should work on a MicroVAX 3500 but as I understand it there is some variation. My other 3500 (LHN) doesn't even have a help command!

>>>help
Following is a brief summary of all the commands supported by the console:

        UPPERCASE  denotes a keyword that you must type in
        |          denotes an OR condition
        []         denotes optional parameters
        <>         denotes a field that must be filled in
                   with a syntactically correct value

Valid qualifiers:
    /B /W /L /Q /INSTRUCTION
    /G /I /V /P /M
    /STEP: /N: /NOT
    /WRONG /U

Valid commands:
    DEPOSIT [<qualifiers>] <address> [<datum> [<datum>]]
    EXAMINE [<qualifiers>] [<address>]
    MOVE [<qualifiers>] <address> <address>
    SEARCH [<qualifiers>] <address> <pattern> [<mask>]
    SET BFLG <boot_flags>
    SET BOOT <boot_device>[:]
    SET HOST/DUP/UQSSP </DISK | /TAPE> <controller_number> [<task>]
    SET HOST/DUP/UQSSP <physical_CSR_address> [<task>]
    SET HOST/MAINTENANCE/UQSSP/SERVICE <controller_number>
    SET HOST/MAINTENANCE/UQSSP <physical_CSR_address>
    SET LANGUAGE <language_number>
    SHOW BFLG
    SHOW BOOT
    SHOW DEVICE
    SHOW ETHERNET
    SHOW LANGUAGE
    SHOW MEMORY [/FULL]
    SHOW QBUS
    SHOW RLV12
    SHOW UQSSP
    SHOW VERSION
    HALT
    INITIALIZE
    UNJAM
    CONTINUE
    START <address>
    REPEAT <command>
    X <address> <count>
    FIND [/MEMORY | /RPB]
    TEST [<test_code> [<parameters>]]
    BOOT [/R5:<boot_flags> | /<boot_flags>] [<boot_device>[:]]
    NEXT [count]
    CONFIGURE
    HELP