M-S Cash Drawer A794 用户手册

Chapter 6: Programming Information

A794 Owner’s Guide

December 1999

134

GS " U n1 n

1D 22 55 n1 n2

29 34 85 n1 n2

1 (see below)

1 (see below)

n1 is the number of 64k sectors used for logos and user-defined characters.
n2 is the number of 64k sectors used for user data storage.

n1 + n2 <= 2 (512K)
n1 + n2 <= 10 (1M)
n1 + n2 <= 18 (2M)

If n1 + n2 is greater than the maximum number of sectors available, the command is
ignored.

Issuing this command with parameters different from current parameters will erase all
sectors.

GS @ n

1D 40 n

29 64 n

49 - 50

n = 49 (ASCII n = 1)
This command erases all 64K Flash Memory sectors allocated to user-defined character
and logos storage. Those sectors should be erased in two situations: when the logo
definition area is full and an application is attempting to define new logos, and when an
application wants to replace one user-defined character set with another. In both cases,
all logos and character set definitions are erased and must be redefined.

n = 50 (ASCII n = 2)
This command erases all sectors available for user data storage.

Erases a page of Flash Memory and sends a carriage return when the operation is
complete.

See command “Flash Memory User Sectors Allocation” (1D 22 55 n1 n2).

While erasing Flash Memory, the printer disables all interrupts, including
communications. To provide feedback to the application, the printer responds to the
application when the erase is complete. After sending the Erase User Flash Sector (1D 40
n) command, an application should wait for the response from the printer before
sending data. Otherwise, data will be lost. If an application is unable to receive data, it
should wait a minimum of five seconds after sending the Erase User Flash Sector (1D 40
n) command before sending data.