Newbie- G-CODE G11 and A

[respire]

Hello,
I'm trying to re-use programs from an old cnc alberti
i does not understand all lines
if someone could help me
G13X25A10 ??? i found A is rotation from X axis ! how can i find center position ?

thanks.
Lionel.

10000,5000,190,"M","ECUREUIL"
" O(4)X50Y70 O0"
" G10X37Y0Z3VX0.5O4"
" G13X25A10"
" G13X0Y27A30"
" G12X52Y88A40"
" G12X44Y122A10"
" G10X13Y110"
" ;"
" G13X40Y140A50"
" X95Y143A45"
" X120Y107A30"
" G12X92Y48A15"
" G00X130Y60"
" ;"
" G10X100Y60"
" G12X75Y50A15"
" G00X70Y35"
" ;"
" G10X70Y40"
" G02/X37Y10I40"
" ;"

[CNCRim]

Never see these code before, but I believe A is mean for radius not to index. I think some of these G-code equivalent to today G-code. You know like
G10=G1
G13=G2/G3
G12=G2/G3
G0=G0

But again at the end of the program there is G2 for something, so the best bet is find the manual for it.

[respire]

Thanks CNCRim
"A" can not be a radius because i found some codes lines where distance between origine and target points where greater than double of A

If someone have some manuals, it was on an old ABERTI with progs CNC90 and PTP400