6530 Programmer's Guide

Block Mode Operation
6530 Programmer’s Guide 3-75
Bit 0 is always set to 1 for compatibility with the 653x. Bit 1 is set the
first time this escape sequence is issued after a power up. Bits 2 and 4 are
set or cleared based on the last output operation to the respective devices.
Bits 3 and 5 are set only when the respective ports are busy outputting
data.
term-id is an ASCII character that identifies the terminal type. For
the 6530, this is always F.
maj-rev-level is an ASCII character that identifies the major
revision level of the 6530 (for example B for B30 or B40).
max-page is an ASCII character whose code specifies the
maximum number of pages available (as defined by default or the
Esc p sequence).
fields1 and fields2 are encoded ASCII characters whose six
least significant bits comprise a 12-bit integer. This integer
represents the average number of fields that can be defined for each
page. For example, if the ASCII characters X and Y are returned in
fields1 and fields2, respectively, they represent an average of 1561
fields that can be defined per page. The maximum value returned is
4096. If room is available for more than this number of fields, 4096
is returned. The value returned is only valid in protect submode.
terminator comprises the control characters ETX (03H) and
LRC (Longitudinal Redundancy Check) in block mode.
Read Full Revision Level (Esc _)
The Esc _ sequence causes the 6530 to transmit its full revision level to
the host. The returned message has the following general format
S0H # rev-level TO device-rev-level terminator
where:
SOH is a control character (01H) that acts as a start of header for
messages returned to the host.
The number sign (#) identifies this message as a firmware message.
rev-level consists of three ASCII characters that identify the
6530’s revision level (for example, B42).
TO and
device-rev-level are returned for compatibility with
6530 options. device-rev-level is always the same as rev-level.
terminator comprises the control characters ETX (03H) and
LRC (Longitudinal Redundancy Check) in block mode.