The BF command fills the specified range of memory with a data
pattern. If an increment is specified, then data is incremented by
this value following each write, otherwise data remains a constant
value. A decrementing pattern may be accomplished by entering a
negative increment. The data that you enter is right-justified in
either a byte, word, or longword field (as specified by the option
selected).
If the user-entered data does not fit into the data field size, then
leading bits are truncated to make it fit. If truncation occurs, then a
message is printed stating the data pattern which was actually
written (or initially written if an increment was specified).
If the user-entered increment
does not fit into the data field size, then leading bits are truncated to make it fit. If truncation occurs, then a message is printed stating the increment which was actually used. If the upper address of the range is not on the correct boundary for an integer multiple of the data to be stored, then data is stored to the last boundary before the upper address. No address outside of the specified range is ever disturbed in any case. The "Effective address" messages displayed by the command show exactly where data was stored.
BH - Bootstrap Operating System and Halt
BH is used to load an operating system or control program from disk into memory. This command works in exactly the same way as the BO command, except that control is not given to the loaded program. After the registers are initialized, control is returned to the 16XBug debugger and the prompt reappears on the terminal screen. Because control is retained by 16XBug, all the 16XBug facilities are available for debugging the loaded program if necessary. A device probe with entry into the device descriptor table is done whenever a specified device is accessed via BH.
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