O'Neil microFlash Series - Manual (Page 116)

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Appendix B: Query User Manual and Technical Guide The O'Neil microFlash Series of Printers
ESC{VR?}
Version
Query Format: ESC{VR?}
Reply Format: {VR!F:x;B:x;D:x}
Function: Firmware, boot code, and download file #.
Reply Example: {VR!F:4.09;B:2.05;D:1.0}
Reply Explanation:
VR! This is a reply to a VERSION query.
F:4:09; The firmware (main program) version is 4.09.
B:2.05; The boot code version is 2.05.
D:1.0; The download file version is 1.0.
Query Reply Definition
F n.nn Firmware version is n.nn
B n.nn Boot code version is n.nn
D n.n Download (fonts, graphics, formats) version is n.n