Axiohm 7156 Spezifikationen Seite 180

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A756- 8xxx new commands and features
January 14, 1998 file name 568xcmds.doc page 1 of 11
Axiohm IPB company confidential
User accessible flash memory
Description
The A756-8xxx provides two 64K pages of non-volatile flash memory that are user accessible.
The advantage of flash memory is that when written, the contents are preserved over a printer
power cycle. Flash memory remains intact until it is erased. Flash memory can be written one
byte at a time, but it cannot be erased one byte at a time: an entire 64K page must be erased
at once. The A756-8xxx offers new commands to support user access to flash memory.
One 64K page is available for user-defined characters and multiple logos. The original
commands to define and print user-defined characters and logos remain unchanged. New
commands handle access to multiple logos, user-defined characters in flash, and flash memory
management.
An existing application, without any changes, will gain the benefit of having a logo stored in
flash automatically: in case of an inadvertent power cycle, the logo is still preserved.
However user-defined characters are not automatically stored in flash, to prevent possibly
printing the wrong characters after a printer power cycle. Application changes are needed to
store user-defined characters in flash.
The other 64K page is available for user data storage. This is a completely new feature, and
new commands handle reads, writes, and memory management.
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