System information

Console Commands
A-24
MicroVax 3100 Models 88/98 User Information
UNJAM
The UNJAM command performs an I/O bus reset, by writing a 1 (one) to IPR 55
(decimal).
Format:
UNJAM
Example:
>>> UNJAM
>>>
X -- Binary Load and Unload
The X command is for use by automatic systems communicating with the console. The X
command loads or unloads (that is, writes to memory or reads from memory) the specified
number of data bytes through the console serial line (regardless of console type) starting at
the specified address.
Format:
X {address} {count} CR {line_checksum} {data} {data_checksum}
Arguments:
{address} The address to unload data from or load data to.
{count} Indicates whether to load or unload data, and also indicates
the amount of data to load or unload.
If bit 31 of the count is clear, data is received by the console
and put into memory. If bit 31 is set, data is read from
memory and sent by the console. The remaining bits in the
count are a positive number indicating the number of bytes
to load or unload.)
CR The console accepts a load or unload command when it
receives the carriage return.
{line_checksum} The line_checksum is the next byte the console receives.
The line_checksum is not echoed.
The line_checksum is verified by adding all the command