User`s guide

KA52/53/54 Firmware Commands
3.2 Console Commands
into an 8-bit register initially set to zero. If the final content of the register is
nonzero, the data or checksum are in error, and the console responds with an
error message.
If the command is a binary unload (bit 31 of the count is set), the console
responds with the input prompt (>>>), followed by the specified number of
bytes of binary data. As each byte is sent, it is added to a checksum register
initially set to zero. At the end of the transmission, the two’s complement of
the low byte of the register is sent.
If the data checksum is incorrect on a load, or if memory or line errors occur
during the transmission of data, the entire transmission is completed, then the
console issues an error message. If an error occurs during loading, the contents
of the memory being loaded are unpredictable.
The console represses echo while it is receiving the data string and checksums.
The console terminates all flow control when it receives the carriage return at
the end of the command line in order to avoid treating flow control characters
from the terminal as valid command line checksums.
You can control the console serial line during a binary unload using control
characters (
Ctrl/C
,
Ctrl/S
,
Ctrl/O
, and so on). You cannot control the console
serial line during a binary load, since all received characters are valid binary
data.
The console has the following timing requirements:
• It must receive data being loaded with a binary load command at a rate of
at least one byte every 60 seconds.
• It must receive the command checksum that precedes the data within 60
seconds of the carriage return that terminates the command line.
• It must receive the data checksum within 60 seconds of the last data byte.
If any of these timing requirements are not met, then the console aborts the
transmission by issuing an error message and returning to the console prompt.
The entire command, including the checksum, can be sent to the console as a
single burst of characters at the specified character rate of the console serial
line. The console is able to receive at least 4 Kbytes of data in a single X
command.
KA52/53/54 Firmware Commands 3–35