6530 Programmer's Guide

Conversational Mode Operation
6530 Programmer’s Guide 2-41
where:
SOH is a control character (01H) that acts as a start of header for
messages returned to the host.
The apostrophe (’) identifies this message as a directory and
redirection message.
drive is an ASCII character in the range of 41H through 5AH that
specifies the current default drive of the workstation or PC.
DC2 is a control character (l2H) used to delimit the following string
values.
string1 is an ASCII string of 1 or more characters that represents
the full pathname (starting from the root and including the backslash)
of the current directory for the specified drive. If the length of stringl
is 0, the 6530 received an operating system error when retrieving the
information.
string2 is an ASCII string of 1 or more characters that represents
the network redirection entry for the specified drive. If the length of
string2 is 0, either the 6530 received an operating system error when
retrieving the information or the specified drive is not in the network
redirection table.
CR is a control character (0DH) that terminates the message.
Device Control This group of escape sequences performs operations on devices attached
to the workstation or PC.
Print Screen (Esc 0)
The Esc 0 sequence transfers the contents of the display screen (except
for the message/status line) to the workstation or PC device specified by
the Auxl parameter. The 6530 reserves a one-page print buffer to save the
data to be printed. When the print function is invoked, the screen data is
moved into the print buffer. Because this is saved in a separate area of
memory, the keyboard need not be locked while the data is printing.
Print requests from your application always take precedence over local
requests by the user. If your application requests a print operation while
one is in process, the 6530 performs the following: