Elecraft P3 Programmer's Reference - Manual (Page 6)

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Appendix A: Change History [Applicable firmware revision shown in brackets]
A1, 10-20-10 [00.41]
Added commands #AVG, #CTF, #DPM, #FNL, #FNX, #LBL, #MFA/B,
#MKA/B, #PKM, #PS, #QSY, #REF, #SCL and #SPN.
A2, 11-05-10 [00.41] Added "Internal use only" commands to the table. Changed #DPM command
name to #DSM. Changed #SPN format. Added #PT and #VFB commands.
A3, 2-16-11 [01.05] Added commands #FXA, #FXT and #TP.
A4, 3-19-12 [01.11] Added commands RST, RVF and RVS